1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2012, 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 -- Checksum Control --
54 ----------------------
56 -- Checksums are computed for sources to check for sources being the same
57 -- from a compilation point of view (e.g. spelling of identifiers and
58 -- white space layout do not count in this computation).
60 -- The way the checksum is computed has evolved across the various versions
61 -- of GNAT. When gprbuild is called with -m, the checksums must be computed
62 -- the same way in gprbuild as it was in the GNAT version of the compiler.
63 -- The different ways are
65 -- Version 6.4 and later:
67 -- The Accumulate_Token_Checksum procedure is called after each numeric
68 -- literal and each identifier/keyword. For keywords, Tok_Identifier is
69 -- used in the call to Accumulate_Token_Checksum.
71 -- Versions 5.04 to 6.3:
73 -- For keywords, the token value were used in the call to procedure
74 -- Accumulate_Token_Checksum. Type Token_Type did not include Tok_Some.
78 -- For keywords, the token value were used in the call to
79 -- Accumulate_Token_Checksum. Type Token_Type did not include
80 -- Tok_Interface, Tok_Overriding, Tok_Synchronized and Tok_Some.
82 -- Versions 5.02 and before:
84 -- No calls to procedure Accumulate_Token_Checksum (the checksum
85 -- mechanism was introduced in version 5.03).
87 -- To signal to the scanner whether Accumulate_Token_Checksum needs to be
88 -- called and what versions to call, the following Boolean flags are used:
90 Checksum_Accumulate_Token_Checksum : Boolean := True;
92 -- Set to False by gprbuild when the version of GNAT is 5.02 or before. If
93 -- this switch is False, then we do not call Accumulate_Token_Checksum, so
94 -- the setting of the following two flags is irrelevant.
96 Checksum_GNAT_6_3 : Boolean := False;
98 -- Set to True by gprbuild when the version of GNAT is 6.3 or before.
100 Checksum_GNAT_5_03 : Boolean := False;
102 -- Set to True by gprbuild when the version of GNAT is 5.03 or before.
104 ----------------------------------------------
105 -- Settings of Modes for Current Processing --
106 ----------------------------------------------
108 -- The following mode values represent the current state of processing.
109 -- The values set here are the default values. Unless otherwise noted,
110 -- the value may be reset in Switch-? with an appropriate switch. In
111 -- some cases, the values can also be modified by pragmas, and in the
112 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
113 -- the default values.
115 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012);
116 pragma Ordered (Ada_Version_Type);
117 -- Versions of Ada for Ada_Version below. Note that these are ordered,
118 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
119 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely
120 -- what you want, because it will apply to future versions of the language.
122 Ada_Version_Default : constant Ada_Version_Type := Ada_2005;
123 pragma Warnings (Off, Ada_Version_Default);
125 -- Default Ada version if no switch given. The Warnings off is to kill
126 -- constant condition warnings.
128 -- WARNING: some scripts rely on the format of this line of code. Any
129 -- change must be coordinated with the scripts requirements.
131 Ada_Version : Ada_Version_Type := Ada_Version_Default;
133 -- Current Ada version for compiler, as set by configuration pragmas,
134 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
135 -- predefined or internal file is compiled.
137 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
139 -- Like Ada_Version, but does not get set implicitly for predefined
140 -- or internal units, so it reflects the Ada version explicitly set
141 -- using configuration pragmas or compiler switches (or if neither
142 -- appears, it remains set to Ada_Version_Default). This is used in
143 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05/12)
144 -- where in the run-time we want the explicit version set.
146 Ada_Version_Runtime : Ada_Version_Type := Ada_2012;
148 -- Ada version used to compile the runtime. Used to set Ada_Version (but
149 -- not Ada_Version_Explicit) when compiling predefined or internal units.
151 Ada_Final_Suffix : constant String := "final";
152 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
154 -- The name of the procedure that performs the finalization at the end of
155 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
157 Ada_Init_Suffix : constant String := "init";
158 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
160 -- The name of the procedure that performs initialization at the start
161 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
163 Ada_Main_Name_Suffix : constant String := "main";
165 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
166 -- can be referenced in a uniform manner to create either the default
167 -- value of Ada_Main_Name (declared below), or the non-default name
168 -- set by Gnatbind.Scan_Bind_Arg.
170 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
172 -- The name of the Ada package generated by the binder (when in Ada mode).
173 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
175 Address_Clause_Overlay_Warnings : Boolean := True;
177 -- Set False to disable address clause warnings
179 Address_Is_Private : Boolean := False;
181 -- Set True if package System has the line "type Address is private;"
183 All_Errors_Mode : Boolean := False;
185 -- Flag set to force display of multiple errors on a single line and
186 -- also repeated error messages for references to undefined identifiers
187 -- and certain other repeated error messages. Set by use of -gnatf.
189 All_Sources : Boolean := False;
191 -- Set to True to require all source files to be present. This flag is
192 -- directly modified by gnatmake to affect the shared binder routines.
194 Alternate_Main_Name : String_Ptr := null;
196 -- Set to non null when Bind_Alternate_Main_Name is True. This value
197 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
199 ASIS_Mode : Boolean := False;
201 -- Enable semantic checks and tree transformations that are important
202 -- for ASIS but that are usually skipped if Operating_Mode is set to
203 -- Check_Semantics. This flag does not have the corresponding option to set
204 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
205 -- from the code of GNSA-based tool (a client may need to set ON the
206 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
207 -- make very much sense, because GNSA cannot do back annotation).
209 Assertions_Enabled : Boolean := False;
211 -- Enable assertions made using pragma Assert
213 Assume_No_Invalid_Values : Boolean := False;
215 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
216 -- that values could have invalid representations, unless it can clearly
217 -- prove that the values are valid. If this switch is set (by -gnatB or by
218 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
219 -- are valid and in range of their representations. This feature is now
220 -- fully enabled in the compiler.
222 Back_Annotate_Rep_Info : Boolean := False;
224 -- If set True, enables back annotation of representation information
225 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
226 -- (list representation information) or -gnatt (generate tree). It is
227 -- also set true if certain Unchecked_Conversion instantiations require
228 -- checking based on annotated values.
230 Back_End_Handles_Limited_Types : Boolean;
231 -- This flag is set true if the back end can properly handle limited or
232 -- other by reference types, and avoid copies. If this flag is False, then
233 -- the front end does special expansion for conditional expressions to make
234 -- sure that no copy occurs. If the flag is True, then the expansion for
235 -- conditional expressions relies on the back end properly handling things.
236 -- Currently the default is False for all cases (set in gnat1drv). The
237 -- default can be modified using -gnatd.L (sets the flag True).
239 Bind_Alternate_Main_Name : Boolean := False;
241 -- True if main should be called Alternate_Main_Name.all.
242 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
244 Bind_Main_Program : Boolean := True;
246 -- Set to False if not binding main Ada program
248 Bind_For_Library : Boolean := False;
250 -- Set to True if the binder needs to generate a file designed for building
251 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
253 Bind_Only : Boolean := False;
254 -- GNATMAKE, GPRMAKE, GPRBUILD
255 -- Set to True to skip compile and link steps
256 -- (except when Compile_Only and/or Link_Only are True).
258 Blank_Deleted_Lines : Boolean := False;
260 -- Output empty lines for each line of preprocessed input that is deleted
261 -- in the output, including preprocessor lines starting with a '#'.
263 Brief_Output : Boolean := False;
265 -- Force brief error messages to standard error, even if verbose mode is
266 -- set (so that main error messages go to standard output).
268 Build_Bind_And_Link_Full_Project : Boolean := False;
270 -- Set to True to build, bind and link all the sources of a project file
273 Check_Aliasing_Of_Parameters : Boolean := False;
275 -- Set to True to detect whether subprogram parameters and function results
276 -- alias the same object(s).
278 Check_Object_Consistency : Boolean := False;
279 -- GNATBIND, GNATMAKE
280 -- Set to True to check whether every object file is consistent with
281 -- its corresponding ada library information (ALI) file. An object
282 -- file is inconsistent with the corresponding ALI file if the object
283 -- file does not exist or if it has an older time stamp than the ALI file.
284 -- Default above is for GNATBIND. GNATMAKE overrides this default to
285 -- True (see Make.Initialize) since we normally do need to check source
286 -- consistencies in gnatmake.
288 Check_Only : Boolean := False;
290 -- Set to True to do checks only, no output of binder file
292 Check_Policy_List : Node_Id := Empty;
294 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
295 -- that are linked through the Next_Pragma fields, with the list being
296 -- terminated by Empty. The order is most recently processed first. Note
297 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
298 -- of this variable, implementing the required scope control for pragmas
299 -- appearing a declarative part.
301 Check_Readonly_Files : Boolean := False;
303 -- Set to True to check readonly files during the make process
305 Check_Source_Files : Boolean := True;
306 -- GNATBIND, GNATMAKE
307 -- Set to True to enable consistency checking for any source files that
308 -- are present (i.e. date must match the date in the library info file).
309 -- Set to False for object file consistency check only. This flag is
310 -- directly modified by gnatmake, to affect the shared binder routines.
312 Check_Switches : Boolean := False;
313 -- GNATMAKE, GPRMAKE, GPBUILD
314 -- Set to True to check compiler options during the make process
316 Check_Unreferenced : Boolean := False;
318 -- Set to True to enable checking for unreferenced entities other
319 -- than formal parameters (for which see Check_Unreferenced_Formals)
321 Check_Unreferenced_Formals : Boolean := False;
323 -- Set to True to check for unreferenced formals. This is turned on by
324 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
326 Check_Validity_Of_Parameters : Boolean := False;
328 -- Set to True to check for proper scalar initialization of subprogram
329 -- parameters on both entry and exit. Turned on by??? turned off by???
331 Check_Withs : Boolean := False;
333 -- Set to True to enable checking for unused withs, and also the case
334 -- of withing a package and using none of the entities in the package.
336 CodePeer_Mode : Boolean := False;
338 -- Enable full CodePeer mode (SCIL generation, disable switches that
339 -- interact badly with it, etc...).
341 Commands_To_Stdout : Boolean := False;
343 -- True if echoed commands to be written to stdout instead of stderr
345 Comment_Deleted_Lines : Boolean := False;
347 -- True if source lines removed by the preprocessor should be commented
348 -- in the output file.
350 Compile_Only : Boolean := False;
351 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
352 -- GNATMAKE, GPRMAKE, GPRMAKE:
353 -- set to True to skip bind and link steps (except when Bind_Only is
355 -- GNATCLEAN, GPRCLEAN:
356 -- set to True to delete only the files produced by the compiler but not
357 -- the library files or the executable files.
359 Config_File : Boolean := True;
361 -- Set to False to inhibit reading and processing of gnat.adc file
363 Config_File_Names : String_List_Access := null;
365 -- Names of configuration pragmas files (given by switches -gnatec)
367 Configurable_Run_Time_Mode : Boolean := False;
369 -- Set True if the compiler is operating in configurable run-time mode.
370 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
371 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
372 -- for details on the handling of the latter pragma.
374 Constant_Condition_Warnings : Boolean := False;
376 -- Set to True to activate warnings on constant conditions
378 Create_Mapping_File : Boolean := False;
380 -- Set to True (-C switch) to indicate that the compiler will be invoked
381 -- with a mapping file (-gnatem compiler switch).
383 Debug_Pragmas_Enabled : Boolean := False;
385 -- Enable debug statements from pragma Debug
387 Debug_Pragmas_Disabled : Boolean := False;
389 -- Debug pragmas completely disabled (no semantic checking)
391 subtype Debug_Level_Value is Nat range 0 .. 3;
392 Debugger_Level : Debug_Level_Value := 0;
394 -- The value given to the -g parameter. The default value for -g with
395 -- no value is 2. This is usually ignored by GNATBIND, except in the
396 -- VMS version where it is passed as an argument to __gnat_initialize
397 -- to trigger the activation of the remote debugging interface.
398 -- Is this still true ???
400 Debug_Generated_Code : Boolean := False;
402 -- Set True (-gnatD switch) to debug generated expanded code instead
403 -- of the original source code. Causes debugging information to be
404 -- written with respect to the generated code file that is written.
406 Default_Exit_Status : Int := 0;
408 -- Set the default exit status value. Set by the -Xnnn switch for the
411 Default_Stack_Size : Int := -1;
413 -- Set to default primary stack size in units of bytes. Set by
414 -- the -dnnn switch for the binder. A value of -1 indicates that no
415 -- default was set by the binder.
417 Default_Sec_Stack_Size : Int := -1;
419 -- Set to default secondary stack size in units of bytes. Set by
420 -- the -Dnnn switch for the binder. A value of -1 indicates that no
421 -- default was set by the binder, and that the default should be the
422 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
424 Default_Pool : Node_Id := Empty;
426 -- Used to record the storage pool name (or null literal) that is the
427 -- argument of an applicable pragma Default_Storage_Pool.
428 -- Empty: No pragma Default_Storage_Pool applies.
429 -- N_Null node: "pragma Default_Storage_Pool (null);" applies.
430 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and
431 -- this points to the name X.
432 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value.
434 Detect_Blocking : Boolean := False;
436 -- Set True to force the run time to raise Program_Error if calls to
437 -- potentially blocking operations are detected from protected actions.
439 Display_Compilation_Progress : Boolean := False;
440 -- GNATMAKE, GPRMAKE, GPRBUILD
441 -- Set True (-d switch) to display information on progress while compiling
442 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
444 type Distribution_Stub_Mode_Type is
447 -- Normal mode, no generation/compilation of distribution stubs
449 Generate_Receiver_Stub_Body,
450 -- The unit being compiled is the RCI body, and the compiler will
451 -- generate the body for the receiver stubs and compile it.
453 Generate_Caller_Stub_Body);
454 -- The unit being compiled is the RCI spec, and the compiler will
455 -- generate the body for the caller stubs and compile it.
457 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
459 -- This enumeration variable indicates the five states of distribution
460 -- annex stub generation/compilation.
462 Do_Not_Execute : Boolean := False;
464 -- Set to True if no actual compilations should be undertaken.
466 Dump_Source_Text : Boolean := False;
468 -- Set to True (by -gnatL) to dump source text intermingled with generated
469 -- code. Effective only if either of Debug/Print_Generated_Code is true.
471 Dynamic_Elaboration_Checks : Boolean := False;
473 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
474 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
476 Dynamic_Stack_Measurement : Boolean := False;
478 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
480 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
482 -- Number of measurements we want to store during dynamic stack analysis.
483 -- When the buffer is full, non-storable results will be output on the fly.
484 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
485 -- by processing of -u flag for gnatbind.
487 Elab_Dependency_Output : Boolean := False;
489 -- Set to True to output complete list of elaboration constraints
491 Elab_Order_Output : Boolean := False;
493 -- Set to True to output chosen elaboration order
495 Elab_Warnings : Boolean := False;
497 -- Set to True to generate full elaboration warnings (-gnatwl)
499 Error_Msg_Line_Length : Nat := 0;
501 -- Records the error message line length limit. If this is set to zero,
502 -- then we get the old style behavior, in which each call to the error
503 -- message routines generates one line of output as a separate message.
504 -- If it is set to a non-zero value, then continuation lines are folded
505 -- to make a single long message, and then this message is split up into
506 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
508 Exception_Handler_Encountered : Boolean := False;
510 -- This flag is set true if the parser encounters an exception handler.
511 -- It is used to set Warn_On_Exception_Propagation True if the restriction
512 -- No_Exception_Propagation is set.
514 Exception_Extra_Info : Boolean := False;
516 -- True when switch -gnateE is used. When True, generate extra information
517 -- associated with exception messages (in particular range and index
520 Exception_Locations_Suppressed : Boolean := False;
522 -- Set to True if a Suppress_Exception_Locations configuration pragma is
525 type Exception_Mechanism_Type is
526 -- Determines the handling of exceptions. See Exp_Ch11 for details
528 (Front_End_Setjmp_Longjmp_Exceptions,
529 -- Exceptions use setjmp/longjmp generated explicitly by the
530 -- front end (this includes gigi or other equivalent parts of
531 -- the code generator). AT END handlers are converted into
532 -- exception handlers by the front end in this mode.
534 Back_End_Exceptions);
535 -- Exceptions are handled by the back end. The front end simply
536 -- generates the handlers as they appear in the source, and AT
537 -- END handlers are left untouched (they are not converted into
538 -- exception handlers when operating in this mode.
539 pragma Convention (C, Exception_Mechanism_Type);
541 Exception_Mechanism : Exception_Mechanism_Type :=
542 Front_End_Setjmp_Longjmp_Exceptions;
544 -- Set to the appropriate value depending on the default as given in
545 -- system.ads (ZCX_By_Default). The C convention is there to make this
546 -- variable accessible to gigi.
548 Exception_Tracebacks : Boolean := False;
550 -- Set to True to store tracebacks in exception occurrences (-E)
552 Extensions_Allowed : Boolean := False;
554 -- Set to True by switch -gnatX if GNAT specific language extensions
555 -- are allowed. For example, the use of 'Constrained with objects of
556 -- generic types is a GNAT extension.
558 type External_Casing_Type is (
559 As_Is, -- External names cased as they appear in the Ada source
560 Uppercase, -- External names forced to all uppercase letters
561 Lowercase); -- External names forced to all lowercase letters
563 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
565 -- The setting of this flag determines the casing of external names
566 -- when the name is implicitly derived from an entity name (i.e. either
567 -- no explicit External_Name or Link_Name argument is used, or, in the
568 -- case of extended DEC pragmas, the external name is given using an
569 -- identifier. The As_Is setting is not permitted here (since this would
570 -- create Ada source programs that were case sensitive).
572 External_Name_Exp_Casing : External_Casing_Type := As_Is;
574 -- The setting of this flag determines the casing of an external name
575 -- specified explicitly with a string literal. As_Is means the string
576 -- literal is used as given with no modification to the casing. If
577 -- Lowercase or Uppercase is set, then the string is forced to all
578 -- lowercase or all uppercase letters as appropriate. Note that this
579 -- setting has no effect if the external name is given using an identifier
580 -- in the case of extended DEC import/export pragmas (in this case the
581 -- casing is controlled by External_Name_Imp_Casing), and also has no
582 -- effect if an explicit Link_Name is supplied (a link name is always
583 -- used exactly as given).
585 External_Unit_Compilation_Allowed : Boolean := False;
587 -- When True (set by gnatmake switch -x), allow compilation of sources
588 -- that are not part of any project file.
590 Fast_Math : Boolean := False;
592 -- Indicates the current setting of Fast_Math mode, as set by the use
593 -- of a Fast_Math pragma (set on by Fast_Math (On)).
595 Float_Format : Character := ' ';
597 -- A non-blank value indicates that a Float_Format pragma has been
598 -- processed, in which case this variable is set to 'I' for IEEE or
599 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
602 Float_Format_Long : Character := ' ';
604 -- A non-blank value indicates that a Long_Float pragma has been
605 -- processed (this pragma is recognized only in OpenVMS versions
606 -- of GNAT), in which case this variable is set to D or G for
607 -- D_Float or G_Float.
609 Force_ALI_Tree_File : Boolean := False;
611 -- Force generation of ALI file even if errors are encountered.
612 -- Also forces generation of tree file if -gnatt is also set.
614 Disable_ALI_File : Boolean := False;
616 -- Disable generation of ALI file
618 Force_Checking_Of_Elaboration_Flags : Boolean := False;
620 -- True if binding with forced checking of the elaboration flags
623 Force_Compilations : Boolean := False;
624 -- GNATMAKE, GPRMAKE, GPRBUILD
625 -- Set to force recompilations even when the objects are up-to-date.
627 Full_Path_Name_For_Brief_Errors : Boolean := False;
629 -- When True, in Brief_Output mode, each error message line
630 -- will start with the full path name of the source.
631 -- When False, only the file name without directory information
634 Full_List : Boolean := False;
636 -- Set True to generate full source listing with embedded errors
638 Full_List_File_Name : String_Ptr := null;
640 -- Set to file name to generate full source listing to named file (or if
641 -- the name is of the form .xxx, then to name.xxx where name is the source
642 -- file name with extension stripped.
644 Generate_Processed_File : Boolean := False;
646 -- True when switch -gnateG is used. When True, create in a file
647 -- <source>.prep, if the source is preprocessed.
649 Generate_SCO : Boolean := False;
651 -- True when switch -gnateS is used. When True, Source Coverage Obligation
652 -- (SCO) information is generated and output in the ALI file. See unit
653 -- Par_SCO for full details.
655 Generating_Code : Boolean := False;
657 -- True if the frontend finished its work and has called the backend to
658 -- process the tree and generate the object file.
660 Global_Discard_Names : Boolean := False;
662 -- True if a pragma Discard_Names appeared as a configuration pragma for
663 -- the current compilation unit.
665 GNAT_Mode : Boolean := False;
667 -- True if compiling in GNAT system mode (-gnatg switch)
669 Heap_Size : Nat := 0;
671 -- Heap size for memory allocations. Valid values are 32 and 64. Only
674 Identifier_Character_Set : Character;
676 -- This variable indicates the character set to be used for identifiers.
677 -- The possible settings are:
678 -- '1' Latin-5 (ISO-8859-1)
679 -- '2' Latin-5 (ISO-8859-2)
680 -- '3' Latin-5 (ISO-8859-3)
681 -- '4' Latin-5 (ISO-8859-4)
682 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
683 -- '9' Latin-5 (ISO-8859-9)
684 -- 'p' PC (US, IBM page 437)
685 -- '8' PC (European, IBM page 850)
686 -- 'f' Full upper set (all distinct)
687 -- 'n' No upper characters (Ada 83 rules)
688 -- 'w' Latin-1 plus wide characters allowed in identifiers
690 -- The setting affects the set of letters allowed in identifiers and the
691 -- upper/lower case equivalences. It does not affect the interpretation of
692 -- character and string literals, which are always stored using the actual
693 -- coding in the source program. This variable is initialized to the
694 -- default value appropriate to the system (in Osint.Initialize), and then
695 -- reset if a command line switch is used to change the setting.
697 Ignore_Rep_Clauses : Boolean := False;
699 -- Set True to ignore all representation clauses. Useful when compiling
700 -- code from foreign compilers for checking or ASIS purposes. Can be
701 -- set True by use of -gnatI.
703 Implementation_Unit_Warnings : Boolean := True;
705 -- Set True to active warnings for use of implementation internal units.
706 -- Can be controlled by use of -gnatwi/-gnatwI.
708 Implicit_Packing : Boolean := False;
710 -- If set True, then a Size attribute clause on an array is allowed to
711 -- cause implicit packing instead of generating an error message. Set by
712 -- use of pragma Implicit_Packing.
714 Ineffective_Inline_Warnings : Boolean := False;
716 -- Set True to activate warnings if front-end inlining (-gnatN) is not
717 -- able to actually inline a particular call (or all calls). Can be
718 -- controlled by use of -gnatwp/-gnatwP.
720 Init_Or_Norm_Scalars : Boolean := False;
722 -- Set True if a pragma Initialize_Scalars applies to the current unit.
723 -- Also set True if a pragma Normalize_Scalars applies.
725 Initialize_Scalars : Boolean := False;
727 -- Set True if a pragma Initialize_Scalars applies to the current unit.
728 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
730 Initialize_Scalars_Mode1 : Character := 'I';
731 Initialize_Scalars_Mode2 : Character := 'N';
733 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
734 -- is IN (invalid values), used if no -S switch is used.
736 Inline_Active : Boolean := False;
738 -- Set True to activate pragma Inline processing across modules. Default
739 -- for now is not to inline across module boundaries.
741 Inline_Level : Nat := 0;
743 -- Set to indicate the inlining level: 0 means that an appropriate value is
744 -- to be computed by the compiler based on the optimization level (-gnatn),
745 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full
746 -- inlining across modules (-gnatn2).
748 Interface_Library_Unit : Boolean := False;
750 -- Set to True to indicate that at least one ALI file is an interface ALI:
751 -- then elaboration flag checks are to be generated in the binder
754 Generate_SCIL : Boolean := False;
756 -- Set True to activate SCIL code generation.
758 Invalid_Value_Used : Boolean := False;
760 -- Set True if a valid Invalid_Value attribute is encountered
762 Follow_Links_For_Files : Boolean := False;
764 -- Set to True (-eL) to process the project files in trusted mode. If
765 -- Follow_Links is False, it is assumed that the project doesn't contain
766 -- any file duplicated through symbolic links (although the latter are
767 -- still valid if they point to a file which is outside of the project),
768 -- and that no directory has a name which is a valid source name.
770 Follow_Links_For_Dirs : Boolean := False;
772 -- Set to True if directories can be links in this project, and therefore
773 -- additional system calls must be performed to ensure that we always see
774 -- the same full name for each directory.
776 Front_End_Inlining : Boolean := False;
778 -- Set True to activate inlining by front-end expansion
780 Inline_Processing_Required : Boolean := False;
782 -- Set True if inline processing is required. Inline processing is required
783 -- if an active Inline pragma is processed. The flag is set for a pragma
784 -- Inline or Inline_Always that is actually active.
786 In_Place_Mode : Boolean := False;
788 -- Set True to store ALI and object files in place i.e. in the object
789 -- directory if these files already exist or in the source directory
792 Keep_Going : Boolean := False;
793 -- GNATMAKE, GPRMAKE, GPRBUILD
794 -- When True signals to ignore compilation errors and keep processing
795 -- sources until there is no more work.
797 Keep_Temporary_Files : Boolean := False;
799 -- When True the temporary files created by the GNAT driver are not
800 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
802 Leap_Seconds_Support : Boolean := False;
804 -- Set to True to enable leap seconds support in Ada.Calendar and its
807 Link_Only : Boolean := False;
808 -- GNATMAKE, GPRMAKE, GPRBUILD
809 -- Set to True to skip compile and bind steps (except when Bind_Only is
812 List_Inherited_Aspects : Boolean := False;
814 -- List inherited invariants, preconditions, and postconditions from
815 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited
816 -- subtype predicates. Set True by use of -gnatw.l and False by use of
819 List_Restrictions : Boolean := False;
821 -- Set to True to list restrictions pragmas that could apply to partition
823 List_Units : Boolean := False;
825 -- List units in the active library for a compilation (-gnatu switch)
827 List_Closure : Boolean := False;
829 -- List all sources in the closure of a main (-R gnatbind switch)
831 List_Dependencies : Boolean := False;
833 -- When True gnatmake verifies that the objects are up to date and
834 -- outputs the list of object dependencies (-M switch).
835 -- Output depends if -a switch is used or not.
836 -- This list can be used directly in a Makefile.
838 List_Representation_Info : Int range 0 .. 3 := 0;
840 -- Set non-zero by -gnatR switch to list representation information.
841 -- The settings are as follows:
843 -- 0 = no listing of representation information (default as above)
844 -- 1 = list rep info for user defined record and array types
845 -- 2 = list rep info for all user defined types and objects
846 -- 3 = like 2, but variable fields are decoded symbolically
848 List_Representation_Info_To_File : Boolean := False;
850 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be
851 -- written to file.rep (where file is the name of the source file) instead
852 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
853 -- representation info is written to x.adb.ref.
855 List_Representation_Info_Mechanisms : Boolean := False;
857 -- Set true by -gnatRm switch. Causes information on mechanisms to be
858 -- included in the representation output information.
860 List_Preprocessing_Symbols : Boolean := False;
862 -- Set to True if symbols for preprocessing a source are to be listed
863 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
864 -- -s in preprocessing data file for the compiler.
866 type Create_Repinfo_File_Proc is access procedure (Src : String);
867 type Write_Repinfo_Line_Proc is access procedure (Info : String);
868 type Close_Repinfo_File_Proc is access procedure;
869 -- Types used for procedure addresses below
871 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
872 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
873 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
875 -- These three locations are left null when operating in non-compiler (e.g.
876 -- ASIS mode), but when operating in compiler mode, they are set to point
877 -- to the three corresponding procedures in Osint-C. The reason for this
878 -- slightly strange interface is to stop Repinfo from dragging in Osint in
879 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
881 type Create_List_File_Proc is access procedure (S : String);
882 type Write_List_Info_Proc is access procedure (S : String);
883 type Close_List_File_Proc is access procedure;
884 -- Types used for procedure addresses below
886 Create_List_File_Access : Create_List_File_Proc := null;
887 Write_List_Info_Access : Write_List_Info_Proc := null;
888 Close_List_File_Access : Close_List_File_Proc := null;
890 -- These three locations are left null when operating in non-compiler
891 -- (e.g. from the binder), but when operating in compiler mode, they are
892 -- set to point to the three corresponding procedures in Osint-C. The
893 -- reason for this slightly strange interface is to prevent Repinfo
894 -- from dragging in Osint-C in the binder, which would include unwanted
895 -- units in the binder.
897 Locking_Policy : Character := ' ';
899 -- Set to ' ' for the default case (no locking policy specified). Reset to
900 -- first character (uppercase) of locking policy name if a valid pragma
901 -- Locking_Policy is encountered.
903 Locking_Policy_Sloc : Source_Ptr := No_Location;
905 -- Remember location of previous Locking_Policy pragma. This is used for
906 -- inconsistency error messages. A value of System_Location is used if the
907 -- policy is set in package System.
909 Look_In_Primary_Dir : Boolean := True;
910 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
911 -- Set to False if a -I- was present on the command line. When True we are
912 -- allowed to look in the primary directory to locate other source or
915 Make_Steps : Boolean := False;
917 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
920 Main_Index : Int := 0;
922 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
923 -- the main program is the nnn unit in a multi-unit source file.
925 Mapping_File_Name : String_Ptr := null;
927 -- File name of mapping between unit names, file names and path names.
928 -- (given by switch -gnatem)
930 Maximum_Messages : Int := 9999;
932 -- Maximum default number of errors before compilation is terminated, or in
933 -- the case of GNAT, maximum number of warnings before further warnings are
934 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
936 Maximum_File_Name_Length : Int;
938 -- Maximum number of characters allowed in a file name, not counting the
939 -- extension, as set by the appropriate switch. If no switch is given,
940 -- then this value is initialized by Osint to the appropriate value.
942 Maximum_Instantiations : Int := 8000;
944 -- Maximum number of instantiations permitted (to stop runaway cases
945 -- of nested instantiations). These situations probably only occur in
946 -- specially concocted test cases. Can be modified by -gnateinn switch.
948 Maximum_Processes : Positive := 1;
949 -- GNATMAKE, GPRMAKE, GPRBUILD
950 -- Maximum number of processes that should be spawned to carry out
953 Minimal_Recompilation : Boolean := False;
955 -- Set to True if minimal recompilation mode requested
957 Multiple_Unit_Index : Int;
959 -- This is set non-zero if the current unit is being compiled in multiple
960 -- unit per file mode, meaning that the current unit is selected from the
961 -- sequence of units in the current source file, using the value stored
962 -- in this variable (e.g. 2 = select second unit in file). A value of
963 -- zero indicates that we are in normal (one unit per file) mode.
965 No_Main_Subprogram : Boolean := False;
966 -- GNATMAKE, GNATBIND
967 -- Set to True if compilation/binding of a program without main
968 -- subprogram requested.
970 No_Run_Time_Mode : Boolean := False;
972 -- This flag is set True if a No_Run_Time pragma is encountered. See
973 -- spec of Rtsfind for a full description of handling of this pragma.
975 No_Split_Units : Boolean := False;
977 -- Set to True with switch --no-split-units. When True, unit sources, spec,
978 -- body and subunits, must all be in the same project.This is checked after
981 No_Stdinc : Boolean := False;
982 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
983 -- Set to True if no default source search dirs added to search list
985 No_Stdlib : Boolean := False;
986 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
987 -- Set to True if no default library search dirs added to search list
989 No_Strict_Aliasing : Boolean := False;
991 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
993 Normalize_Scalars : Boolean := False;
995 -- Set True if a pragma Normalize_Scalars applies to the current unit.
996 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
998 Object_Directory_Present : Boolean := False;
1000 -- Set to True when an object directory is specified with option -D
1002 Object_Path_File_Name : String_Ptr := null;
1004 -- Path of the temporary file that contains a list of object directories
1005 -- passed by -gnateO=<obj_pat_file>.
1007 One_Compilation_Per_Obj_Dir : Boolean := False;
1008 -- GNATMAKE, GPRBUILD
1009 -- Set to True with switch --single-compile-per-obj-dir. When True, there
1010 -- cannot be simultaneous compilations with the object files in the same
1011 -- object directory, if project files are used.
1013 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
1014 Operating_Mode : Operating_Mode_Type := Generate_Code;
1016 -- Indicates the operating mode of the compiler. The default is generate
1017 -- code, which runs the parser, semantics and backend. Switches can be
1018 -- used to set syntax checking only mode, or syntax and semantics checking
1019 -- only mode. Operating_Mode can also be modified as a result of detecting
1020 -- errors during the compilation process. In particular if any serious
1021 -- error is detected then this flag is reset from Generate_Code to
1022 -- Check_Semantics after generating an error message.
1024 Optimize_Alignment : Character := 'O';
1025 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
1026 -- be modified by use of pragma Optimize_Alignment.
1028 Optimize_Alignment_Local : Boolean := False;
1029 -- Set True if Optimize_Alignment mode is set by a local configuration
1030 -- pragma that overrides the gnat.adc (or other configuration file) default
1031 -- so that the unit is not dependent on the default setting. Also always
1032 -- set True for internal units, since these always have a default setting
1033 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
1034 -- them all having such an explicit pragma in each unit).
1036 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
1038 -- Indicates the original operating mode of the compiler as set by compiler
1039 -- options. This is identical to Operating_Mode except that this is not
1040 -- affected by errors.
1042 Optimization_Level : Int;
1043 pragma Import (C, Optimization_Level, "optimize");
1044 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
1045 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
1046 -- GNAAMP back ends.
1048 Optimize_Size : Int;
1049 pragma Import (C, Optimize_Size, "optimize_size");
1050 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
1051 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
1052 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
1054 Output_File_Name_Present : Boolean := False;
1055 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
1056 -- Set to True when the output C file name is given with option -o for
1057 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
1058 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
1060 Output_Linker_Option_List : Boolean := False;
1062 -- True if output of list of linker options is requested (-K switch set)
1064 Output_ALI_List : Boolean := False;
1065 ALI_List_Filename : String_Ptr;
1067 -- True if output of list of ALIs is requested (-A switch set). List is
1068 -- output under the given filename, or standard output if not specified.
1070 Output_Object_List : Boolean := False;
1071 Object_List_Filename : String_Ptr;
1073 -- True if output of list of objects is requested (-O switch set). List is
1074 -- output under the given filename, or standard output if not specified.
1076 Persistent_BSS_Mode : Boolean := False;
1078 -- True if a Persistent_BSS configuration pragma is in effect, causing
1079 -- potentially persistent data to be placed in the persistent_bss section.
1081 Pessimistic_Elab_Order : Boolean := False;
1083 -- True if pessimistic elaboration order is to be chosen (-p switch set)
1085 Polling_Required : Boolean := False;
1087 -- Set to True if polling for asynchronous abort is enabled by using
1088 -- the -gnatP option for GNAT.
1090 Preprocessing_Data_File : String_Ptr := null;
1092 -- Set by switch -gnatep=. The file name of the preprocessing data file.
1094 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4);
1095 -- An extensible array to temporarily stores symbol definitions specified
1096 -- on the command line with -gnateD switches.
1097 -- What is this magic constant 4 ???
1098 -- What is extensible about this fixed length array ???
1100 Preprocessing_Symbol_Last : Natural := 0;
1101 -- Index of last symbol definition in array Symbol_Definitions
1103 Print_Generated_Code : Boolean := False;
1105 -- Set to True to enable output of generated code in source form. This
1106 -- flag is set by the -gnatG switch.
1108 Print_Standard : Boolean := False;
1110 -- Set to true to enable printing of package standard in source form.
1111 -- This flag is set by the -gnatS switch
1113 Propagate_Exceptions : Boolean := False;
1115 -- Indicates if subprogram descriptor exception tables should be
1116 -- built for imported subprograms. Set True if a Propagate_Exceptions
1117 -- pragma applies to the extended main unit.
1119 type Usage is (Unknown, Not_In_Use, In_Use);
1120 Project_File_In_Use : Usage := Unknown;
1122 -- Indicates if a project file is used or not. Set to In_Use by the first
1125 Queuing_Policy : Character := ' ';
1127 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1128 -- first character (uppercase) of locking policy name if a valid
1129 -- Queuing_Policy pragma is encountered.
1131 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1133 -- Remember location of previous Queuing_Policy pragma. This is used for
1134 -- inconsistency error messages. A value of System_Location is used if the
1135 -- policy is set in package System.
1137 Quiet_Output : Boolean := False;
1138 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1139 -- Set to True if the tool should not have any output if there are no
1140 -- errors or warnings.
1142 Replace_In_Comments : Boolean := False;
1144 -- Set to True if -C switch used
1146 RTS_Lib_Path_Name : String_Ptr := null;
1147 RTS_Src_Path_Name : String_Ptr := null;
1149 -- Set to the "adalib" and "adainclude" directories of the run time
1150 -- specified by --RTS=.
1152 RTS_Switch : Boolean := False;
1153 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1154 -- Set to True when the --RTS switch is set
1156 Run_Path_Option : Boolean := True;
1157 -- GNATMAKE, GNATLINK
1158 -- Set to False when no run_path_option should be issued to the linker
1160 Search_Directory_Present : Boolean := False;
1162 -- Set to True when argument is -I. Reset to False when next argument, a
1163 -- search directory path is taken into account. Note that this is quite
1164 -- different from other switches in this section in that it is only set in
1165 -- a transitory manner as a result of scanning a -I switch with no file
1166 -- name, and if set, is an indication that the next argument is to be
1167 -- treated as a file name.
1169 Sec_Stack_Used : Boolean := False;
1171 -- Set True if generated code uses the System.Secondary_Stack package. For
1172 -- the binder, set if any unit uses the secondary stack package.
1174 Setup_Projects : Boolean := False;
1176 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1177 -- object, library and exec directories.
1179 Shared_Libgnat : Boolean;
1181 -- Set to True if a shared libgnat is requested by using the -shared option
1182 -- for GNATBIND and to False when using the -static option. The value of
1183 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1185 Short_Circuit_And_Or : Boolean := False;
1187 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1189 Short_Descriptors : Boolean := False;
1191 -- Set True if a pragma Short_Descriptors applies to the current unit.
1193 Special_Exception_Package_Used : Boolean := False;
1195 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
1196 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
1197 -- local raise statements into gotos in the presence of either package.
1199 Sprint_Line_Limit : Nat := 72;
1201 -- Limit values for chopping long lines in Sprint output, can be reset
1202 -- by use of NNN parameter with -gnatG or -gnatD switches.
1204 Stack_Checking_Enabled : Boolean;
1206 -- Set to indicate if -fstack-check switch is set for the compilation. True
1207 -- means that the switch is set, so that stack checking is enabled. False
1208 -- means that the switch is not set (no stack checking). This value is
1209 -- obtained from the external imported value flag_stack_check in the gcc
1210 -- backend (see Frontend) and may be referenced throughout the compilation
1213 Style_Check : Boolean := False;
1215 -- Set True to perform style checks. Activates checks carried out in
1216 -- package Style (see body of this package for details of checks). This
1217 -- flag is set True by either the -gnatg or -gnaty switches.
1219 Suppress_All_Inlining : Boolean := False;
1221 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1222 -- regardless of any other switches that are set.
1224 Suppress_Control_Flow_Optimizations : Boolean := False;
1226 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1227 -- that interfere with coverage analysis based on the object code.
1229 System_Extend_Pragma_Arg : Node_Id := Empty;
1231 -- Set non-empty if and only if a correct Extend_System pragma was present
1232 -- in which case it points to the argument of the pragma, and the name can
1233 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1235 System_Extend_Unit : Node_Id := Empty;
1237 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1238 -- is never appropriate in GNAT_Mode (and causes troubles, including
1239 -- bogus circularities, if we try to compile the run-time library with
1240 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1241 -- is a copy of the value set in System_Extend_Pragma_Arg.
1243 Subunits_Missing : Boolean := False;
1245 -- This flag is set true if missing subunits are detected with code
1246 -- generation active. This causes code generation to be skipped.
1248 Suppress_Checks : Boolean := False;
1250 -- Set to True if -gnatp (suppress all checks) switch present.
1252 Suppress_Options : Suppress_Record;
1254 -- Indicates outer level setting of check suppression. This initializes
1255 -- the settings of the outer scope level in any unit compiled. This is
1256 -- initialized by Osint.Initialize, and further initialized by the
1257 -- Adjust_Global_Switches flag in Gnat1drv.
1259 Suppress_Back_Annotation : Boolean := False;
1261 -- This flag is set True if back annotation of representation information
1262 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1263 -- This avoids unnecessary time being spent on back annotation.
1265 Table_Factor : Int := 1;
1267 -- Factor by which all initial table sizes set in Alloc are multiplied.
1268 -- Used in Table to calculate initial table sizes (the initial table size
1269 -- is the value in Alloc, used as the Table_Initial parameter value,
1270 -- multiplied by the factor given here. The default value is used if no
1271 -- -gnatT switch appears.
1273 Tagged_Type_Expansion : Boolean := True;
1275 -- Set True if tagged types and interfaces should be expanded by the
1276 -- front-end. If False, the original tree is left unexpanded for tagged
1277 -- types and dispatching calls, assuming the underlying target supports
1278 -- it (e.g. in the JVM case).
1280 Task_Dispatching_Policy : Character := ' ';
1282 -- Set to ' ' for the default case (no task dispatching policy specified).
1283 -- Reset to first character (uppercase) of task dispatching policy name
1284 -- if a valid Task_Dispatching_Policy pragma is encountered.
1286 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1288 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1289 -- used for inconsistency error messages. A value of System_Location is
1290 -- used if the policy is set in package System.
1292 Tasking_Used : Boolean := False;
1293 -- Set True if any tasking construct is encountered. Used to activate the
1294 -- output of the Q, L and T lines in ALI files.
1296 Time_Slice_Set : Boolean := False;
1298 -- Set True if a pragma Time_Slice is processed in the main unit, or
1299 -- if the -gnatTnn switch is present to set a time slice value.
1301 Time_Slice_Value : Nat;
1303 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1304 -- Time_Slice pragma has been processed. Set to the time slice value in
1305 -- microseconds. Negative values are stored as zero, and the value is not
1306 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1307 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1309 Tolerate_Consistency_Errors : Boolean := False;
1311 -- Tolerate time stamp and other consistency errors. If this flag is set to
1312 -- True (-t), then inconsistencies result in warnings rather than errors.
1314 Treat_Categorization_Errors_As_Warnings : Boolean := False;
1315 -- Normally categorization errors are true illegalities. If this switch
1316 -- is set, then such errors result in warning messages rather than error
1317 -- messages. Set True by -gnateP (P for Pure/Preelaborate).
1319 Treat_Restrictions_As_Warnings : Boolean := False;
1321 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1324 Tree_Output : Boolean := False;
1326 -- Set to True (-gnatt) to generate output tree file
1328 True_VMS_Target : Boolean := False;
1329 -- Set True if we are on a VMS target. The setting of this flag reflects
1330 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1331 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1332 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1334 Try_Semantics : Boolean := False;
1336 -- Flag set to force attempt at semantic analysis, even if parser errors
1337 -- occur. This will probably cause blowups at this stage in the game. On
1338 -- the other hand, most such blowups will be caught cleanly and simply
1339 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1341 Unchecked_Shared_Lib_Imports : Boolean := False;
1343 -- Set to True when shared library projects are allowed to import projects
1344 -- that are not shared library projects. Set by switch
1345 -- --unchecked-shared-lib-imports.
1347 Undefined_Symbols_Are_False : Boolean := False;
1349 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1350 -- file for the compiler. Indicates that while preprocessing sources,
1351 -- symbols that are not defined have the value FALSE.
1353 Unique_Error_Tag : Boolean := Tag_Errors;
1355 -- Indicates if error messages are to be prefixed by the string error:
1356 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1358 Universal_Addressing_On_AAMP : Boolean := False;
1360 -- Indicates if library-level objects should be accessed and updated using
1361 -- universal addressing instructions on the AAMP architecture. This flag is
1362 -- set to True when pragma Universal_Data is given as a configuration
1365 Unreserve_All_Interrupts : Boolean := False;
1367 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1368 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1369 -- corresponding attribute set in GNATBIND.
1371 Upper_Half_Encoding : Boolean := False;
1373 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1374 -- used in the normal way to represent themselves. If the wide character
1375 -- encoding method uses the upper bit for this encoding, then this flag is
1376 -- set True, and upper half characters in the source indicate the start of
1377 -- a wide character sequence. Set by -gnatW or -W switches.
1379 Use_Include_Path_File : Boolean := False;
1380 -- GNATMAKE, GPRBUILD
1381 -- When True, create a source search path file, even when a mapping file
1384 Usage_Requested : Boolean := False;
1385 -- GNAT, GNATBIND, GNATMAKE
1386 -- Set to True if -h (-gnath for the compiler) switch encountered
1387 -- requesting usage information
1389 Use_Expression_With_Actions : Boolean;
1390 -- The N_Expression_With_Actions node has been introduced relatively
1391 -- recently, and not all back ends are prepared to handle it yet. So
1392 -- we use this flag to suppress its use during a transitional period.
1393 -- Currently the default is False for all cases (set in gnat1drv).
1394 -- The default can be modified using -gnatd.X/-gnatd.Y.
1396 Use_Pragma_Linker_Constructor : Boolean := False;
1398 -- True if pragma Linker_Constructor applies to adainit
1400 Use_VADS_Size : Boolean := False;
1402 -- Set to True if a valid pragma Use_VADS_Size is processed
1404 Validity_Checks_On : Boolean := True;
1406 -- This flag determines if validity checking is on or off. The initial
1407 -- state is on, and the required default validity checks are active. The
1408 -- actual set of checks that is performed if Validity_Checks_On is set is
1409 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1410 -- is controlled by pragma Validity_Checks (On | Off), and also some
1411 -- generated compiler code (typically code that has to do with validity
1412 -- check generation) is compiled with this flag set to False. This flag is
1413 -- set to False by the -gnatp switch.
1415 Verbose_Mode : Boolean := False;
1416 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1417 -- GPRMAKE, GPRBUILD, GPRCLEAN
1418 -- Set to True to get verbose mode (full error message text and location
1419 -- information sent to standard output, also header, copyright and summary)
1421 type Verbosity_Level_Type is (None, Low, Medium, High);
1422 pragma Ordered (Verbosity_Level_Type);
1423 Verbosity_Level : Verbosity_Level_Type := High;
1424 -- GNATMAKE, GPRMAKE
1425 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1426 -- the level of verbosity of informational messages:
1428 -- In Low Verbosity, the reasons why a source is recompiled, the name
1429 -- of the executable and the reason it must be rebuilt is output.
1431 -- In Medium Verbosity, additional lines are output for each ALI file
1434 -- In High Verbosity, additional lines are output when the ALI file
1435 -- is part of an Ada library, is read-only or is part of the runtime.
1437 Warn_On_Ada_2005_Compatibility : Boolean := True;
1439 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1440 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1441 -- mode. Set False by -gnatwY.
1443 Warn_On_Ada_2012_Compatibility : Boolean := True;
1445 -- Set to True to generate all warnings on Ada 2012 compatibility issues,
1446 -- including warnings on Ada 2012 obsolescent features used in Ada 2012
1447 -- mode. Set False by -gnatwY.
1449 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1451 -- Set to True to generate warnings in all cases where a variable is
1452 -- modified by being passed as to an OUT formal, but the resulting value is
1453 -- never read. The default is that this warning is suppressed, except in
1456 Warn_On_Assertion_Failure : Boolean := True;
1458 -- Set to True to activate warnings on assertions that can be determined
1459 -- at compile time will always fail. Set false by -gnatw.A.
1461 Warn_On_Assumed_Low_Bound : Boolean := True;
1463 -- Set to True to activate warnings for string parameters that are indexed
1464 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1465 -- False by -gnatwW.
1467 Warn_On_Atomic_Synchronization : Boolean := False;
1469 -- Set to True to generate information messages for atomic synchronization.
1470 -- Set True by use of -gnatw.n.
1472 Warn_On_Bad_Fixed_Value : Boolean := False;
1474 -- Set to True to generate warnings for static fixed-point expression
1475 -- values that are not an exact multiple of the small value of the type.
1477 Warn_On_Biased_Representation : Boolean := True;
1479 -- Set to True to generate warnings for size clauses, component clauses
1480 -- and component_size clauses that force biased representation. Set False
1483 Warn_On_Constant : Boolean := False;
1485 -- Set to True to generate warnings for variables that could be declared
1486 -- as constants. Modified by use of -gnatwk/K.
1488 Warn_On_Deleted_Code : Boolean := False;
1490 -- Set to True to generate warnings for code deleted by the front end
1491 -- for conditional statements whose outcome is known at compile time.
1492 -- Modified by use of -gnatwt/T.
1494 Warn_On_Dereference : Boolean := False;
1496 -- Set to True to generate warnings for implicit dereferences for array
1497 -- indexing and record component access. Modified by use of -gnatwd/D.
1499 Warn_On_Export_Import : Boolean := True;
1501 -- Set to True to generate warnings for suspicious use of export or
1502 -- import pragmas. Modified by use of -gnatwx/X.
1504 Warn_On_Hiding : Boolean := False;
1506 -- Set to True to generate warnings if a declared entity hides another
1507 -- entity. The default is that this warning is suppressed.
1509 Warn_On_Modified_Unread : Boolean := False;
1511 -- Set to True to generate warnings if a variable is assigned but is never
1512 -- read. Also controls warnings for similar cases involving out parameters,
1513 -- but only if there is only one out parameter for the procedure involved.
1514 -- The default is that this warning is suppressed.
1516 Warn_On_No_Value_Assigned : Boolean := True;
1518 -- Set to True to generate warnings if no value is ever assigned to a
1519 -- variable that is at least partially uninitialized. Set to false to
1520 -- suppress such warnings. The default is that such warnings are enabled.
1522 Warn_On_Non_Local_Exception : Boolean := False;
1524 -- Set to True to generate warnings for non-local exception raises and also
1525 -- handlers that can never handle a local raise. This warning is only ever
1526 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1527 -- default is not to generate the warnings except that if the source has
1528 -- at least one exception handler, and this restriction is set, and the
1529 -- warning was not explicitly turned off, then it is turned on by default.
1531 No_Warn_On_Non_Local_Exception : Boolean := False;
1533 -- This is set to True if the above warning is explicitly suppressed. We
1534 -- use this to avoid turning it on by default when No_Exception_Propagation
1535 -- restriction is set and an exception handler is present.
1537 Warn_On_Object_Renames_Function : Boolean := False;
1539 -- Set to True to generate warnings when a function result is renamed as
1540 -- an object. The default is that this warning is disabled.
1542 Warn_On_Obsolescent_Feature : Boolean := False;
1544 -- Set to True to generate warnings on use of any feature in Annex or if a
1545 -- subprogram is called for which a pragma Obsolescent applies.
1547 Warn_On_Overlap : Boolean := False;
1549 -- Set to True to generate warnings when a writable actual which is not
1550 -- a by-copy type overlaps with another actual in a subprogram call.
1552 Warn_On_Questionable_Missing_Parens : Boolean := True;
1554 -- Set to True to generate warnings for cases where parentheses are missing
1555 -- and the usage is questionable, because the intent is unclear.
1557 Warn_On_Parameter_Order : Boolean := False;
1559 -- Set to True to generate warnings for cases where the argument list for
1560 -- a call is a sequence of identifiers that match the formal identifiers,
1561 -- but are in the wrong order.
1563 Warn_On_Redundant_Constructs : Boolean := False;
1565 -- Set to True to generate warnings for redundant constructs (e.g. useless
1566 -- assignments/conversions). The default is that this warning is disabled.
1568 Warn_On_Reverse_Bit_Order : Boolean := True;
1570 -- Set to True to generate warning (informational) messages for component
1571 -- clauses that are affected by non-standard bit-order. The default is
1572 -- that this warning is enabled.
1574 Warn_On_Suspicious_Contract : Boolean := False;
1576 -- Set to True to generate warnings for suspicious contracts expressed as
1577 -- pragmas or aspects precondition and postcondition. The default is that
1578 -- this warning is disabled.
1580 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1582 -- Set to True to generate warnings for suspicious modulus values. The
1583 -- default is that this warning is enabled.
1585 Warn_On_Unchecked_Conversion : Boolean := True;
1587 -- Set to True to generate warnings for unchecked conversions that may have
1588 -- non-portable semantics (e.g. because sizes of types differ). The default
1589 -- is that this warning is enabled.
1591 Warn_On_Unordered_Enumeration_Type : Boolean := False;
1593 -- Set to True to generate warnings for inappropriate uses (comparisons
1594 -- and explicit ranges) on unordered enumeration types (which includes
1595 -- all enumeration types for which pragma Ordered is not given). The
1596 -- default is that this warning is disabled.
1598 Warn_On_Unrecognized_Pragma : Boolean := True;
1600 -- Set to True to generate warnings for unrecognized pragmas. The default
1601 -- is that this warning is enabled.
1603 Warn_On_Unrepped_Components : Boolean := False;
1605 -- Set to True to generate warnings for the case of components of record
1606 -- which have a record representation clause but this component does not
1607 -- have a component clause. The default is that this warning is disabled.
1609 Warn_On_Warnings_Off : Boolean := False;
1611 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1612 -- where either the pragma is never used, or it could be replaced by a
1613 -- pragma Unmodified or Unreferenced.
1615 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1616 Warning_Mode : Warning_Mode_Type := Normal;
1618 -- Controls treatment of warning messages. If set to Suppress, warning
1619 -- messages are not generated at all. In Normal mode, they are generated
1620 -- but do not count as errors. In Treat_As_Error mode, warning messages
1621 -- are generated and are treated as errors.
1623 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1625 -- Method used for encoding wide characters in the source program. See
1626 -- description of type in unit System.WCh_Con for a list of the methods
1627 -- that are currently supported. Note that brackets notation is always
1628 -- recognized in source programs regardless of the setting of this
1629 -- variable. The default setting causes only the brackets notation to be
1630 -- recognized. If this is the main unit, this setting also controls the
1631 -- output of the W=? parameter in the ALI file, which is used to provide
1632 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1633 -- the value set here overrides this main unit default.
1635 Wide_Character_Encoding_Method_Specified : Boolean := False;
1637 -- Set True if the value in Wide_Character_Encoding_Method was set as
1638 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1640 Xref_Active : Boolean := True;
1642 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1644 Zero_Formatting : Boolean := False;
1646 -- Do no formatting (no title, no leading spaces, no empty lines) in
1647 -- auxiliary outputs (-e, -K, -l, -R).
1649 ----------------------------
1650 -- Configuration Settings --
1651 ----------------------------
1653 -- These are settings that are used to establish the mode at the start of
1654 -- each unit. The values defined below can be affected either by command
1655 -- line switches, or by the use of appropriate configuration pragmas in a
1656 -- configuration pragma file.
1658 Ada_Version_Config : Ada_Version_Type;
1660 -- This is the value of the configuration switch for the Ada 83 mode, as
1661 -- set by the command line switches -gnat83/95/05, and possibly modified by
1662 -- the use of configuration pragmas Ada_*. This switch is used to set the
1663 -- initial value for Ada_Version mode at the start of analysis of a unit.
1664 -- Note however that the setting of this flag is ignored for internal and
1665 -- predefined units (which are always compiled in the most up to date
1668 Ada_Version_Explicit_Config : Ada_Version_Type;
1670 -- This is set in the same manner as Ada_Version_Config. The difference is
1671 -- that the setting of this flag is not ignored for internal and predefined
1672 -- units, which for some purposes do indeed access this value, regardless
1673 -- of the fact that they are compiled the most up to date ada version).
1675 Assertions_Enabled_Config : Boolean;
1677 -- This is the value of the configuration switch for assertions enabled
1678 -- mode, as possibly set by the command line switch -gnata, and possibly
1679 -- modified by the use of the configuration pragma Assertion_Policy.
1681 Assume_No_Invalid_Values_Config : Boolean;
1683 -- This is the value of the configuration switch for assuming "no invalid
1684 -- values enabled" mode, as possibly set by the command line switch
1685 -- -gnatB, and possibly modified by the use of the configuration pragma
1686 -- Assume_No_Invalid_Values.
1688 Check_Policy_List_Config : Node_Id;
1690 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1691 -- that are linked through the Next_Pragma fields, with the list being
1692 -- terminated by Empty. The order is most recently processed first. This
1693 -- list includes only those pragmas in configuration pragma files.
1695 Debug_Pragmas_Disabled_Config : Boolean;
1697 -- This is the value of the configuration switch for debug pragmas disabled
1698 -- mode, as possibly set by use of the configuration pragma Debug_Policy.
1700 Debug_Pragmas_Enabled_Config : Boolean;
1702 -- This is the value of the configuration switch for debug pragmas enabled
1703 -- mode, as possibly set by the command line switch -gnata and possibly
1704 -- modified by the use of the configuration pragma Debug_Policy.
1706 Default_Pool_Config : Node_Id := Empty;
1708 -- Same as Default_Pool above, except this is only for Default_Storage_Pool
1709 -- pragmas that are configuration pragmas.
1711 Dynamic_Elaboration_Checks_Config : Boolean := False;
1713 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1714 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1716 Exception_Locations_Suppressed_Config : Boolean := False;
1718 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1720 Extensions_Allowed_Config : Boolean;
1722 -- This is the flag that indicates whether extensions are allowed. It can
1723 -- be set True either by use of the -gnatX switch, or by use of the
1724 -- configuration pragma Extensions_Allowed (On). It is always set to True
1725 -- for internal GNAT units, since extensions are always permitted in such
1728 External_Name_Exp_Casing_Config : External_Casing_Type;
1730 -- This is the value of the configuration switch that controls casing of
1731 -- external symbols for which an explicit external name is given. It can be
1732 -- set to Uppercase by the command line switch -gnatF, and further modified
1733 -- by the use of the configuration pragma External_Name_Casing in the
1734 -- gnat.adc file. This flag is used to set the initial value for
1735 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1736 -- however that the setting of this flag is ignored for internal and
1737 -- predefined units (which are always compiled with As_Is mode).
1739 External_Name_Imp_Casing_Config : External_Casing_Type;
1741 -- This is the value of the configuration switch that controls casing of
1742 -- external symbols where the external name is implicitly given. It can be
1743 -- set to Uppercase by the command line switch -gnatF, and further modified
1744 -- by the use of the configuration pragma External_Name_Casing in the
1745 -- gnat.adc file. This flag is used to set the initial value for
1746 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1747 -- however that the setting of this flag is ignored for internal and
1748 -- predefined units (which are always compiled with Lowercase mode).
1750 Fast_Math_Config : Boolean;
1752 -- This is the value of the configuration switch that controls Fast_Math
1753 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1754 -- used to set the initial value of Fast_Math at the start of each new
1755 -- compilation unit.
1757 Initialize_Scalars_Config : Boolean;
1759 -- This is the value of the configuration switch that is set by the
1760 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1761 -- This switch is not set when the pragma appears ahead of a given
1762 -- unit, so it does not affect the compilation of other units.
1764 Optimize_Alignment_Config : Character;
1766 -- This is the value of the configuration switch that controls the
1767 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1768 -- It is used to set the initial value of Optimize_Alignment at the start
1769 -- of each new compilation unit, except that it is always set to 'O' (off)
1770 -- for internal units.
1772 Persistent_BSS_Mode_Config : Boolean;
1774 -- This is the value of the configuration switch that controls whether
1775 -- potentially persistent data is to be placed in the persistent_bss
1776 -- section. It can be set True by use of the pragma Persistent_BSS.
1777 -- This flag is used to set the initial value of Persistent_BSS_Mode
1778 -- at the start of each compilation unit, except that it is always
1779 -- set False for predefined units.
1781 Polling_Required_Config : Boolean;
1783 -- This is the value of the configuration switch that controls polling
1784 -- mode. It can be set True by the command line switch -gnatP, and then
1785 -- further modified by the use of pragma Polling in the gnat.adc file. This
1786 -- flag is used to set the initial value for Polling_Required at the start
1787 -- of analyzing each unit.
1789 Short_Descriptors_Config : Boolean;
1791 -- This is the value of the configuration switch that controls the use of
1792 -- Short_Descriptors for setting descriptor default sizes. It can be set
1793 -- True by the use of the pragma Short_Descriptors in the gnat.adc file.
1794 -- This flag is used to set the initial value for Short_Descriptors at the
1795 -- start of analyzing each unit.
1797 Use_VADS_Size_Config : Boolean;
1799 -- This is the value of the configuration switch that controls the use of
1800 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1801 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1802 -- This flag is used to set the initial value for Use_VADS_Size at the
1803 -- start of analyzing each unit. Note however that the setting of this flag
1804 -- is ignored for internal and predefined units (which are always compiled
1805 -- with the standard Size semantics).
1807 type Config_Switches_Type is private;
1808 -- Type used to save values of the switches set from Config values
1810 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1811 -- This procedure saves the current values of the switches which are
1812 -- initialized from the above Config values, and then resets these switches
1813 -- according to the Config value settings.
1815 procedure Set_Opt_Config_Switches
1816 (Internal_Unit : Boolean;
1817 Main_Unit : Boolean);
1818 -- This procedure sets the switches to the appropriate initial values. The
1819 -- parameter Internal_Unit is True for an internal or predefined unit, and
1820 -- affects the way the switches are set (see above). Main_Unit is true if
1821 -- switches are being set for the main unit (this affects setting of the
1822 -- assert/debug pragma switches, which are normally set false by default
1823 -- for an internal unit, except when the internal unit is the main unit,
1824 -- in which case we use the command line settings).
1826 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1827 -- This procedure restores a set of switch values previously saved by a
1828 -- call to Save_Opt_Switches.
1830 procedure Register_Opt_Config_Switches;
1831 -- This procedure is called after processing the gnat.adc file and other
1832 -- configuration pragma files to record the values of the Config switches,
1833 -- as possibly modified by the use of command line switches and pragmas
1834 -- appearing in these files.
1836 ------------------------
1837 -- Other Global Flags --
1838 ------------------------
1840 Expander_Active : Boolean := False;
1841 -- A flag that indicates if expansion is active (True) or deactivated
1842 -- (False). When expansion is deactivated all calls to expander routines
1843 -- have no effect. Note that the initial setting of False is merely to
1844 -- prevent saving of an undefined value for an initial call to the
1845 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1846 -- this flag, see package Expander. Indeed this flag might more logically
1847 -- be in the spec of Expander, but it is referenced by Errout, and it
1848 -- really seems wrong for Errout to depend on Expander.
1850 -- Note: for many purposes, it is more appropriate to test the flag
1851 -- Full_Expander_Active, which also checks that Alfa mode is not active.
1853 Static_Dispatch_Tables : Boolean := True;
1854 -- This flag indicates if the backend supports generation of statically
1855 -- allocated dispatch tables. If it is True, then the front end will
1856 -- generate static aggregates for dispatch tables that contain forward
1857 -- references to addresses of subprograms not seen yet, and the back end
1858 -- must be prepared to handle this case. If it is False, then the front
1859 -- end generates assignments to initialize the dispatch table, and there
1860 -- are no such forward references. By default we build statically allocated
1861 -- dispatch tables for all library level tagged types in all platforms.This
1862 -- behavior can be disabled using switch -gnatd.t which will set this flag
1863 -- to False and revert to the previous dynamic behavior.
1865 -----------------------
1866 -- Tree I/O Routines --
1867 -----------------------
1869 procedure Tree_Read;
1870 -- Reads switch settings from current tree file using Tree_Read
1872 procedure Tree_Write;
1873 -- Writes out switch settings to current tree file using Tree_Write
1875 --------------------------
1876 -- ASIS Version Control --
1877 --------------------------
1879 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1880 -- are supposed to be used in the GNAT/ASIS version check performed in
1881 -- the ASIS code (this package is also a part of the ASIS implementation).
1882 -- They are set by Tree_Read procedure, so they represent the version
1883 -- number (and the version string) of the compiler which has created the
1884 -- tree, and they are supposed to be compared with the corresponding values
1885 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1888 Tree_Version_String : String_Access;
1889 -- Used to store the compiler version string read from a tree file to check
1890 -- if it is from the same date as stored in the version string in Gnatvsn.
1891 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1892 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1893 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1894 -- of the corresponding source sets, using version strings that may be
1895 -- of different lengths.
1897 Tree_ASIS_Version_Number : Int;
1898 -- Used to store the ASIS version number read from a tree file to check if
1899 -- it is the same as stored in the ASIS version number in Tree_IO.
1901 -----------------------------------
1902 -- Modes for Formal Verification --
1903 -----------------------------------
1905 Alfa_Mode : Boolean := False;
1906 -- Specific compiling mode targeting formal verification through the
1907 -- generation of Why code for those parts of the input code that belong to
1908 -- the Alfa subset of Ada. Set by debug flag -gnatd.F.
1910 Strict_Alfa_Mode : Boolean := False;
1911 -- Interpret compiler permissions as strictly as possible. E.g. base ranges
1912 -- for integers are limited to the strict minimum with this option. Set by
1913 -- debug flag -gnatd.D.
1915 function Full_Expander_Active return Boolean;
1916 pragma Inline (Full_Expander_Active);
1917 -- Returns the value of (Expander_Active and not Alfa_Mode). This "flag"
1918 -- indicates that expansion is fully active, that is, not in the reduced
1919 -- mode for Alfa (True) or that expansion is either deactivated, or active
1920 -- in the reduced mode for Alfa (False). For more information on full
1921 -- expansion, see package Expander. For more information on reduced
1922 -- Alfa expansion, see package Exp_Alfa.
1926 -- The following type is used to save and restore settings of switches in
1927 -- Opt that represent the configuration (i.e. result of config pragmas).
1929 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1930 -- flag that once set does not get reset, since the whole idea of this flag
1931 -- is to record the setting for the main unit.
1933 type Config_Switches_Type is record
1934 Ada_Version : Ada_Version_Type;
1935 Ada_Version_Explicit : Ada_Version_Type;
1936 Assertions_Enabled : Boolean;
1937 Assume_No_Invalid_Values : Boolean;
1938 Check_Policy_List : Node_Id;
1939 Debug_Pragmas_Disabled : Boolean;
1940 Debug_Pragmas_Enabled : Boolean;
1941 Default_Pool : Node_Id;
1942 Dynamic_Elaboration_Checks : Boolean;
1943 Exception_Locations_Suppressed : Boolean;
1944 Extensions_Allowed : Boolean;
1945 External_Name_Exp_Casing : External_Casing_Type;
1946 External_Name_Imp_Casing : External_Casing_Type;
1947 Fast_Math : Boolean;
1948 Initialize_Scalars : Boolean;
1949 Normalize_Scalars : Boolean;
1950 Optimize_Alignment : Character;
1951 Optimize_Alignment_Local : Boolean;
1952 Persistent_BSS_Mode : Boolean;
1953 Polling_Required : Boolean;
1954 Short_Descriptors : Boolean;
1955 Use_VADS_Size : Boolean;
1958 -- The following declarations are for GCC version dependent flags. We do
1959 -- not let client code in the compiler test GCC_Version directly, but
1960 -- instead use deferred constants for relevant feature tags.
1962 -- Note: there currently are no such constants defined in this section,
1963 -- since the compiler front end is currently entirely independent of the
1964 -- GCC version, which is a desirable state of affairs.
1966 function get_gcc_version return Int;
1967 pragma Import (C, get_gcc_version, "get_gcc_version");
1969 GCC_Version : constant Nat := get_gcc_version;
1971 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1972 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
projects / gcc.git / blob