1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2013, 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_2012;
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 Ada_Version : Ada_Version_Type := Ada_Version_Default;
130 -- Current Ada version for compiler, as set by configuration pragmas,
131 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
132 -- predefined or internal file is compiled.
134 Ada_Version_Pragma : Node_Id := Empty;
135 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used
136 -- to specialize error messages complaining about the Ada version in use.
138 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
140 -- Like Ada_Version, but does not get set implicitly for predefined
141 -- or internal units, so it reflects the Ada version explicitly set
142 -- using configuration pragmas or compiler switches (or if neither
143 -- appears, it remains set to Ada_Version_Default). This is used in
144 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05/12)
145 -- where in the run-time we want the explicit version set.
147 Ada_Version_Runtime : Ada_Version_Type := Ada_2012;
149 -- Ada version used to compile the runtime. Used to set Ada_Version (but
150 -- not Ada_Version_Explicit) when compiling predefined or internal units.
152 Ada_Final_Suffix : constant String := "final";
153 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
155 -- The name of the procedure that performs the finalization at the end of
156 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
158 Ada_Init_Suffix : constant String := "init";
159 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
161 -- The name of the procedure that performs initialization at the start
162 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
164 Ada_Main_Name_Suffix : constant String := "main";
166 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
167 -- can be referenced in a uniform manner to create either the default
168 -- value of Ada_Main_Name (declared below), or the non-default name
169 -- set by Gnatbind.Scan_Bind_Arg.
171 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
173 -- The name of the Ada package generated by the binder (when in Ada mode).
174 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
176 Address_Clause_Overlay_Warnings : Boolean := True;
178 -- Set False to disable address clause warnings. Modified by use of
181 Address_Is_Private : Boolean := False;
183 -- Set True if package System has the line "type Address is private;"
185 All_Errors_Mode : Boolean := False;
187 -- Flag set to force display of multiple errors on a single line and
188 -- also repeated error messages for references to undefined identifiers
189 -- and certain other repeated error messages. Set by use of -gnatf.
191 All_Sources : Boolean := False;
193 -- Set to True to require all source files to be present. This flag is
194 -- directly modified by gnatmake to affect the shared binder routines.
196 Alternate_Main_Name : String_Ptr := null;
198 -- Set to non null when Bind_Alternate_Main_Name is True. This value
199 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
201 ASIS_Mode : Boolean := False;
203 -- Enable semantic checks and tree transformations that are important
204 -- for ASIS but that are usually skipped if Operating_Mode is set to
205 -- Check_Semantics. This flag does not have the corresponding option to set
206 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
207 -- from the code of GNSA-based tool (a client may need to set ON the
208 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
209 -- make very much sense, because GNSA cannot do back annotation).
211 Assertions_Enabled : Boolean := False;
213 -- Indicates default policy (True = Check, False = Ignore) to be applied
214 -- to all assertion aspects and pragmas, and to pragma Debug, if there is
215 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma.
216 -- Set True by use of -gnata.
218 Assume_No_Invalid_Values : Boolean := False;
219 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end
220 -- assumes that values could have invalid representations, unless it can
221 -- clearly prove that the values are valid. If this switch is set (by
222 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
223 -- are valid and in range of their representations. This feature is now
224 -- fully enabled in the compiler.
226 Back_Annotate_Rep_Info : Boolean := False;
228 -- If set True, enables back annotation of representation information
229 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
230 -- (list representation information) or -gnatt (generate tree). It is
231 -- also set true if certain Unchecked_Conversion instantiations require
232 -- checking based on annotated values.
234 Back_End_Handles_Limited_Types : Boolean;
235 -- This flag is set true if the back end can properly handle limited or
236 -- other by reference types, and avoid copies. If this flag is False, then
237 -- the front end does special expansion for if/case expressions to make
238 -- sure that no copy occurs. If the flag is True, then the expansion for
239 -- if and case expressions relies on the back end properly handling things.
240 -- Currently the default is False for all cases (set in gnat1drv). The
241 -- default can be modified using -gnatd.L (sets the flag True). This is
242 -- used to test the possibility of having the backend handle this.
244 Bind_Alternate_Main_Name : Boolean := False;
246 -- True if main should be called Alternate_Main_Name.all.
247 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
249 Bind_Main_Program : Boolean := True;
251 -- Set to False if not binding main Ada program
253 Bind_For_Library : Boolean := False;
255 -- Set to True if the binder needs to generate a file designed for building
256 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
258 Bind_Only : Boolean := False;
259 -- GNATMAKE, GPRMAKE, GPRBUILD
260 -- Set to True to skip compile and link steps
261 -- (except when Compile_Only and/or Link_Only are True).
263 Blank_Deleted_Lines : Boolean := False;
265 -- Output empty lines for each line of preprocessed input that is deleted
266 -- in the output, including preprocessor lines starting with a '#'.
268 Brief_Output : Boolean := False;
270 -- Force brief error messages to standard error, even if verbose mode is
271 -- set (so that main error messages go to standard output).
273 Build_Bind_And_Link_Full_Project : Boolean := False;
275 -- Set to True to build, bind and link all the sources of a project file
278 Check_Aliasing_Of_Parameters : Boolean := False;
280 -- Set to True to detect whether subprogram parameters and function results
281 -- alias the same object(s).
283 Check_Float_Overflow : Boolean := False;
285 -- Set to True to check that operations on predefined unconstrained float
286 -- types (e.g. Float, Long_Float) do not overflow and generate infinities
287 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use
288 -- of the -gnateF switch.
290 Check_Object_Consistency : Boolean := False;
291 -- GNATBIND, GNATMAKE
292 -- Set to True to check whether every object file is consistent with its
293 -- corresponding ada library information (ALI) file. An object file is
294 -- inconsistent with the corresponding ALI file if the object file does
295 -- not exist or if it has an older time stamp than the ALI file. Default
296 -- above is for GNATBIND. GNATMAKE overrides this default to True (see
297 -- Make.Initialize) since we normally do need to check source consistencies
300 Check_Only : Boolean := False;
302 -- Set to True to do checks only, no output of binder file
304 Check_Policy_List : Node_Id := Empty;
306 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
307 -- that are linked through the Next_Pragma fields, with the list being
308 -- terminated by Empty. The order is most recently processed first. Note
309 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
310 -- of this variable, implementing the required scope control for pragmas
311 -- appearing in a declarative part.
313 Check_Readonly_Files : Boolean := False;
315 -- Set to True to check readonly files during the make process
317 Check_Source_Files : Boolean := True;
318 -- GNATBIND, GNATMAKE
319 -- Set to True to enable consistency checking for any source files that
320 -- are present (i.e. date must match the date in the library info file).
321 -- Set to False for object file consistency check only. This flag is
322 -- directly modified by gnatmake, to affect the shared binder routines.
324 Check_Switches : Boolean := False;
325 -- GNATMAKE, GPRMAKE, GPBUILD
326 -- Set to True to check compiler options during the make process
328 Check_Unreferenced : Boolean := False;
330 -- Set to True to enable checking for unreferenced entities other
331 -- than formal parameters (for which see Check_Unreferenced_Formals)
332 -- Modified by use of -gnatwu/U.
334 Check_Unreferenced_Formals : Boolean := False;
336 -- Set to True to check for unreferenced formals. This is turned on by
337 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
339 Check_Validity_Of_Parameters : Boolean := False;
341 -- Set to True to check for proper scalar initialization of subprogram
342 -- parameters on both entry and exit. Turned on by??? turned off by???
344 Check_Withs : Boolean := False;
346 -- Set to True to enable checking for unused withs, and also the case
347 -- of withing a package and using none of the entities in the package.
348 -- Modified by use of -gnatwu/U.
350 CodePeer_Mode : Boolean := False;
351 -- GNAT, GNATBIND, GPRBUILD
352 -- Enable full CodePeer mode (SCIL generation, disable switches that
353 -- interact badly with it, etc...).
355 Commands_To_Stdout : Boolean := False;
357 -- True if echoed commands to be written to stdout instead of stderr
359 Comment_Deleted_Lines : Boolean := False;
361 -- True if source lines removed by the preprocessor should be commented
362 -- in the output file.
364 Compile_Only : Boolean := False;
365 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
366 -- GNATMAKE, GPRMAKE, GPRMAKE:
367 -- set to True to skip bind and link steps (except when Bind_Only is
369 -- GNATCLEAN, GPRCLEAN:
370 -- set to True to delete only the files produced by the compiler but not
371 -- the library files or the executable files.
373 Config_File : Boolean := True;
375 -- Set to False to inhibit reading and processing of gnat.adc file
377 Config_File_Names : String_List_Access := null;
379 -- Names of configuration pragmas files (given by switches -gnatec)
381 Configurable_Run_Time_Mode : Boolean := False;
383 -- Set True if the compiler is operating in configurable run-time mode.
384 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
385 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
386 -- for details on the handling of the latter pragma.
388 Constant_Condition_Warnings : Boolean := False;
390 -- Set to True to activate warnings on constant conditions. Modified by
393 Create_Mapping_File : Boolean := False;
395 -- Set to True (-C switch) to indicate that the compiler will be invoked
396 -- with a mapping file (-gnatem compiler switch).
398 subtype Debug_Level_Value is Nat range 0 .. 3;
399 Debugger_Level : Debug_Level_Value := 0;
401 -- The value given to the -g parameter. The default value for -g with
402 -- no value is 2. This is usually ignored by GNATBIND, except in the
403 -- VMS version where it is passed as an argument to __gnat_initialize
404 -- to trigger the activation of the remote debugging interface.
405 -- Is this still true ???
407 Debug_Generated_Code : Boolean := False;
409 -- Set True (-gnatD switch) to debug generated expanded code instead
410 -- of the original source code. Causes debugging information to be
411 -- written with respect to the generated code file that is written.
413 Default_Exit_Status : Int := 0;
415 -- Set the default exit status value. Set by the -Xnnn switch for the
418 Default_Stack_Size : Int := -1;
420 -- Set to default primary stack size in units of bytes. Set by
421 -- the -dnnn switch for the binder. A value of -1 indicates that no
422 -- default was set by the binder.
424 Default_Sec_Stack_Size : Int := -1;
426 -- Set to default secondary stack size in units of bytes. Set by
427 -- the -Dnnn switch for the binder. A value of -1 indicates that no
428 -- default was set by the binder, and that the default should be the
429 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
431 Default_Pool : Node_Id := Empty;
433 -- Used to record the storage pool name (or null literal) that is the
434 -- argument of an applicable pragma Default_Storage_Pool.
435 -- Empty: No pragma Default_Storage_Pool applies.
436 -- N_Null node: "pragma Default_Storage_Pool (null);" applies.
437 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and
438 -- this points to the name X.
439 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value.
441 Detect_Blocking : Boolean := False;
443 -- Set True to force the run time to raise Program_Error if calls to
444 -- potentially blocking operations are detected from protected actions.
446 Directories_Must_Exist_In_Projects : Boolean := True;
448 -- Set to False with switch -f of gnatclean and gprclean
450 Display_Compilation_Progress : Boolean := False;
451 -- GNATMAKE, GPRMAKE, GPRBUILD
452 -- Set True (-d switch) to display information on progress while compiling
453 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
455 type Distribution_Stub_Mode_Type is
458 -- Normal mode, no generation/compilation of distribution stubs
460 Generate_Receiver_Stub_Body,
461 -- The unit being compiled is the RCI body, and the compiler will
462 -- generate the body for the receiver stubs and compile it.
464 Generate_Caller_Stub_Body);
465 -- The unit being compiled is the RCI spec, and the compiler will
466 -- generate the body for the caller stubs and compile it.
468 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
470 -- This enumeration variable indicates the five states of distribution
471 -- annex stub generation/compilation.
473 Do_Not_Execute : Boolean := False;
475 -- Set to True if no actual compilations should be undertaken.
477 Dump_Source_Text : Boolean := False;
479 -- Set to True (by -gnatL) to dump source text intermingled with generated
480 -- code. Effective only if either of Debug/Print_Generated_Code is true.
482 Dynamic_Elaboration_Checks : Boolean := False;
484 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
485 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
487 Dynamic_Stack_Measurement : Boolean := False;
489 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
491 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
493 -- Number of measurements we want to store during dynamic stack analysis.
494 -- When the buffer is full, non-storable results will be output on the fly.
495 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
496 -- by processing of -u flag for gnatbind.
498 Elab_Dependency_Output : Boolean := False;
500 -- Set to True to output complete list of elaboration constraints
502 Elab_Order_Output : Boolean := False;
504 -- Set to True to output chosen elaboration order
506 Elab_Warnings : Boolean := False;
508 -- Set to True to generate full elaboration warnings (-gnatwl)
510 Error_Msg_Line_Length : Nat := 0;
512 -- Records the error message line length limit. If this is set to zero,
513 -- then we get the old style behavior, in which each call to the error
514 -- message routines generates one line of output as a separate message.
515 -- If it is set to a non-zero value, then continuation lines are folded
516 -- to make a single long message, and then this message is split up into
517 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
519 Error_To_Warning : Boolean := False;
521 -- If True, then certain error messages (e.g. parameter overlap messages
522 -- for procedure calls in Ada 2012 mode) are treated as warnings instead
523 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning
524 -- will identify affected messages.
526 Exception_Handler_Encountered : Boolean := False;
528 -- This flag is set true if the parser encounters an exception handler.
529 -- It is used to set Warn_On_Exception_Propagation True if the restriction
530 -- No_Exception_Propagation is set.
532 Exception_Extra_Info : Boolean := False;
534 -- True when switch -gnateE is used. When True, generate extra information
535 -- associated with exception messages (in particular range and index
538 Exception_Locations_Suppressed : Boolean := False;
540 -- Set to True if a Suppress_Exception_Locations configuration pragma is
543 type Exception_Mechanism_Type is
544 -- Determines the handling of exceptions. See Exp_Ch11 for details
546 (Front_End_Setjmp_Longjmp_Exceptions,
547 -- Exceptions use setjmp/longjmp generated explicitly by the front end
548 -- (this includes gigi or other equivalent parts of the code generator).
549 -- AT END handlers are converted into exception handlers by the front
552 Back_End_Exceptions);
553 -- Exceptions are handled by the back end. The front end simply
554 -- generates the handlers as they appear in the source, and AT END
555 -- handlers are left untouched (they are not converted into exception
556 -- handlers when operating in this mode.
557 pragma Convention (C, Exception_Mechanism_Type);
559 Exception_Mechanism : Exception_Mechanism_Type :=
560 Front_End_Setjmp_Longjmp_Exceptions;
562 -- Set to the appropriate value depending on the default as given in
563 -- system.ads (ZCX_By_Default). The C convention is there to make this
564 -- variable accessible to gigi.
566 Exception_Tracebacks : Boolean := False;
568 -- Set to True to store tracebacks in exception occurrences (-E)
570 Extensions_Allowed : Boolean := False;
572 -- Set to True by switch -gnatX if GNAT specific language extensions
573 -- are allowed. Currently there are no such defined extensions.
575 type External_Casing_Type is (
576 As_Is, -- External names cased as they appear in the Ada source
577 Uppercase, -- External names forced to all uppercase letters
578 Lowercase); -- External names forced to all lowercase letters
580 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
582 -- The setting of this flag determines the casing of external names
583 -- when the name is implicitly derived from an entity name (i.e. either
584 -- no explicit External_Name or Link_Name argument is used, or, in the
585 -- case of extended DEC pragmas, the external name is given using an
586 -- identifier. The As_Is setting is not permitted here (since this would
587 -- create Ada source programs that were case sensitive).
589 External_Name_Exp_Casing : External_Casing_Type := As_Is;
591 -- The setting of this flag determines the casing of an external name
592 -- specified explicitly with a string literal. As_Is means the string
593 -- literal is used as given with no modification to the casing. If
594 -- Lowercase or Uppercase is set, then the string is forced to all
595 -- lowercase or all uppercase letters as appropriate. Note that this
596 -- setting has no effect if the external name is given using an identifier
597 -- in the case of extended DEC import/export pragmas (in this case the
598 -- casing is controlled by External_Name_Imp_Casing), and also has no
599 -- effect if an explicit Link_Name is supplied (a link name is always
600 -- used exactly as given).
602 External_Unit_Compilation_Allowed : Boolean := False;
604 -- When True (set by gnatmake switch -x), allow compilation of sources
605 -- that are not part of any project file.
607 Fast_Math : Boolean := False;
609 -- Indicates the current setting of Fast_Math mode, as set by the use
610 -- of a Fast_Math pragma (set True by Fast_Math (On)).
612 Float_Format : Character := ' ';
614 -- A non-blank value indicates that a Float_Format pragma has been
615 -- processed, in which case this variable is set to 'I' for IEEE or to
616 -- 'V' for VAX. The setting of 'V' is only possible on OpenVMS versions
619 Float_Format_Long : Character := ' ';
621 -- A non-blank value indicates that a Long_Float pragma has been processed
622 -- (this pragma is recognized only in OpenVMS versions of GNAT), in which
623 -- case this variable is set to D or G for D_Float or G_Float.
625 Force_ALI_Tree_File : Boolean := False;
627 -- Force generation of ALI file even if errors are encountered. Also forces
628 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ.
630 Disable_ALI_File : Boolean := False;
632 -- Disable generation of ALI file
634 Force_Checking_Of_Elaboration_Flags : Boolean := False;
636 -- True if binding with forced checking of the elaboration flags
639 Force_Compilations : Boolean := False;
640 -- GNATMAKE, GPRMAKE, GPRBUILD
641 -- Set to force recompilations even when the objects are up-to-date.
643 Full_Path_Name_For_Brief_Errors : Boolean := False;
645 -- When True, in Brief_Output mode, each error message line
646 -- will start with the full path name of the source.
647 -- When False, only the file name without directory information
650 Full_List : Boolean := False;
652 -- Set True to generate full source listing with embedded errors
654 Full_List_File_Name : String_Ptr := null;
656 -- Set to file name to generate full source listing to named file (or if
657 -- the name is of the form .xxx, then to name.xxx where name is the source
658 -- file name with extension stripped.
660 Generate_Processed_File : Boolean := False;
662 -- True when switch -gnateG is used. When True, create in a file
663 -- <source>.prep, if the source is preprocessed.
665 Generate_SCO : Boolean := False;
667 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source
668 -- Coverage Obligation (SCO) information is generated and output in the ALI
669 -- file. See unit Par_SCO for full details.
671 Generate_SCO_Instance_Table : Boolean := False;
673 -- True when switch -fdebug-instances is used. When True, a table of
674 -- instances is included in SCOs.
676 Generating_Code : Boolean := False;
678 -- True if the frontend finished its work and has called the backend to
679 -- process the tree and generate the object file.
681 Global_Discard_Names : Boolean := False;
683 -- True if a pragma Discard_Names appeared as a configuration pragma for
684 -- the current compilation unit.
686 GNAT_Mode : Boolean := False;
688 -- True if compiling in GNAT system mode (-gnatg switch)
690 Heap_Size : Nat := 0;
692 -- Heap size for memory allocations. Valid values are 32 and 64. Only
695 Identifier_Character_Set : Character;
697 -- This variable indicates the character set to be used for identifiers.
698 -- The possible settings are:
699 -- '1' Latin-5 (ISO-8859-1)
700 -- '2' Latin-5 (ISO-8859-2)
701 -- '3' Latin-5 (ISO-8859-3)
702 -- '4' Latin-5 (ISO-8859-4)
703 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
704 -- '9' Latin-5 (ISO-8859-9)
705 -- 'p' PC (US, IBM page 437)
706 -- '8' PC (European, IBM page 850)
707 -- 'f' Full upper set (all distinct)
708 -- 'n' No upper characters (Ada 83 rules)
709 -- 'w' Latin-1 plus wide characters allowed in identifiers
711 -- The setting affects the set of letters allowed in identifiers and the
712 -- upper/lower case equivalences. It does not affect the interpretation of
713 -- character and string literals, which are always stored using the actual
714 -- coding in the source program. This variable is initialized to the
715 -- default value appropriate to the system (in Osint.Initialize), and then
716 -- reset if a command line switch is used to change the setting.
718 Ignore_Rep_Clauses : Boolean := False;
720 -- Set True to ignore all representation clauses. Useful when compiling
721 -- code from foreign compilers for checking or ASIS purposes. Can be
722 -- set True by use of -gnatI.
724 Ignore_Style_Checks_Pragmas : Boolean := False;
726 -- Set True to ignore all Style_Checks pragmas. Can be set True by use
729 Ignore_Unrecognized_VWY_Switches : Boolean := False;
731 -- Set True to ignore unrecognized y, V, w switches. Can be set True
732 -- by use of -gnateu, causing subsequent unrecognized switches to result
733 -- in a warning rather than an error.
735 Implementation_Unit_Warnings : Boolean := True;
737 -- Set True to active warnings for use of implementation internal units.
738 -- Modified by use of -gnatwi/-gnatwI.
740 Implicit_Packing : Boolean := False;
742 -- If set True, then a Size attribute clause on an array is allowed to
743 -- cause implicit packing instead of generating an error message. Set by
744 -- use of pragma Implicit_Packing.
746 Ineffective_Inline_Warnings : Boolean := False;
748 -- Set True to activate warnings if front-end inlining (-gnatN) is not
749 -- able to actually inline a particular call (or all calls). Can be
750 -- controlled by use of -gnatwp/-gnatwP.
752 Init_Or_Norm_Scalars : Boolean := False;
754 -- Set True if a pragma Initialize_Scalars applies to the current unit.
755 -- Also set True if a pragma Normalize_Scalars applies.
757 Initialize_Scalars : Boolean := False;
759 -- Set True if a pragma Initialize_Scalars applies to the current unit.
760 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
762 Initialize_Scalars_Mode1 : Character := 'I';
763 Initialize_Scalars_Mode2 : Character := 'N';
765 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
766 -- is IN (invalid values), used if no -S switch is used.
768 Inline_Active : Boolean := False;
770 -- Set True to activate pragma Inline processing across modules. Default
771 -- for now is not to inline across module boundaries.
773 Inline_Level : Nat := 0;
775 -- Set to indicate the inlining level: 0 means that an appropriate value is
776 -- to be computed by the compiler based on the optimization level (-gnatn),
777 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full
778 -- inlining across modules (-gnatn2).
780 Interface_Library_Unit : Boolean := False;
782 -- Set to True to indicate that at least one ALI file is an interface ALI:
783 -- then elaboration flag checks are to be generated in the binder
786 Generate_SCIL : Boolean := False;
788 -- Set True to activate SCIL code generation.
790 Invalid_Value_Used : Boolean := False;
792 -- Set True if a valid Invalid_Value attribute is encountered
794 Follow_Links_For_Files : Boolean := False;
796 -- Set to True (-eL) to process the project files in trusted mode. If
797 -- Follow_Links is False, it is assumed that the project doesn't contain
798 -- any file duplicated through symbolic links (although the latter are
799 -- still valid if they point to a file which is outside of the project),
800 -- and that no directory has a name which is a valid source name.
802 Follow_Links_For_Dirs : Boolean := False;
804 -- Set to True if directories can be links in this project, and therefore
805 -- additional system calls must be performed to ensure that we always see
806 -- the same full name for each directory.
808 Front_End_Inlining : Boolean := False;
810 -- Set True to activate inlining by front-end expansion
812 Inline_Processing_Required : Boolean := False;
814 -- Set True if inline processing is required. Inline processing is required
815 -- if an active Inline pragma is processed. The flag is set for a pragma
816 -- Inline or Inline_Always that is actually active.
818 In_Place_Mode : Boolean := False;
820 -- Set True to store ALI and object files in place i.e. in the object
821 -- directory if these files already exist or in the source directory
824 Keep_Going : Boolean := False;
825 -- GNATMAKE, GPRMAKE, GPRBUILD
826 -- When True signals to ignore compilation errors and keep processing
827 -- sources until there is no more work.
829 Keep_Temporary_Files : Boolean := False;
831 -- When True the temporary files created by the GNAT driver are not
832 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
834 Leap_Seconds_Support : Boolean := False;
836 -- Set to True to enable leap seconds support in Ada.Calendar and its
839 Link_Only : Boolean := False;
840 -- GNATMAKE, GPRMAKE, GPRBUILD
841 -- Set to True to skip compile and bind steps (except when Bind_Only is
844 List_Body_Required_Info : Boolean := False;
846 -- List info messages about why a package requires a body. Modified by use
849 List_Inherited_Aspects : Boolean := False;
851 -- List inherited invariants, preconditions, and postconditions from
852 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited
853 -- subtype predicates. Modified by use of -gnatw.l/.L.
855 List_Restrictions : Boolean := False;
857 -- Set to True to list restrictions pragmas that could apply to partition
859 List_Units : Boolean := False;
861 -- List units in the active library for a compilation (-gnatu switch)
863 List_Closure : Boolean := False;
865 -- List all sources in the closure of a main (-R gnatbind switch)
867 List_Dependencies : Boolean := False;
869 -- When True gnatmake verifies that the objects are up to date and
870 -- outputs the list of object dependencies (-M switch).
871 -- Output depends if -a switch is used or not.
872 -- This list can be used directly in a Makefile.
874 List_Representation_Info : Int range 0 .. 3 := 0;
876 -- Set non-zero by -gnatR switch to list representation information.
877 -- The settings are as follows:
879 -- 0 = no listing of representation information (default as above)
880 -- 1 = list rep info for user defined record and array types
881 -- 2 = list rep info for all user defined types and objects
882 -- 3 = like 2, but variable fields are decoded symbolically
884 List_Representation_Info_To_File : Boolean := False;
886 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3/m to be
887 -- written to file.rep (where file is the name of the source file) instead
888 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
889 -- representation info is written to x.adb.ref.
891 List_Representation_Info_Mechanisms : Boolean := False;
893 -- Set true by -gnatRm switch. Causes information on mechanisms to be
894 -- included in the representation output information.
896 List_Preprocessing_Symbols : Boolean := False;
898 -- Set to True if symbols for preprocessing a source are to be listed
899 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
900 -- -s in preprocessing data file for the compiler.
902 type Create_Repinfo_File_Proc is access procedure (Src : String);
903 type Write_Repinfo_Line_Proc is access procedure (Info : String);
904 type Close_Repinfo_File_Proc is access procedure;
905 -- Types used for procedure addresses below
907 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
908 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
909 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
911 -- These three locations are left null when operating in non-compiler (e.g.
912 -- ASIS mode), but when operating in compiler mode, they are set to point
913 -- to the three corresponding procedures in Osint-C. The reason for this
914 -- slightly strange interface is to stop Repinfo from dragging in Osint in
915 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
917 type Create_List_File_Proc is access procedure (S : String);
918 type Write_List_Info_Proc is access procedure (S : String);
919 type Close_List_File_Proc is access procedure;
920 -- Types used for procedure addresses below
922 Create_List_File_Access : Create_List_File_Proc := null;
923 Write_List_Info_Access : Write_List_Info_Proc := null;
924 Close_List_File_Access : Close_List_File_Proc := null;
926 -- These three locations are left null when operating in non-compiler
927 -- (e.g. from the binder), but when operating in compiler mode, they are
928 -- set to point to the three corresponding procedures in Osint-C. The
929 -- reason for this slightly strange interface is to prevent Repinfo
930 -- from dragging in Osint-C in the binder, which would include unwanted
931 -- units in the binder.
933 Locking_Policy : Character := ' ';
935 -- Set to ' ' for the default case (no locking policy specified). Reset to
936 -- first character (uppercase) of locking policy name if a valid pragma
937 -- Locking_Policy is encountered.
939 Locking_Policy_Sloc : Source_Ptr := No_Location;
941 -- Remember location of previous Locking_Policy pragma. This is used for
942 -- inconsistency error messages. A value of System_Location is used if the
943 -- policy is set in package System.
945 Look_In_Primary_Dir : Boolean := True;
946 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
947 -- Set to False if a -I- was present on the command line. When True we are
948 -- allowed to look in the primary directory to locate other source or
951 Make_Steps : Boolean := False;
953 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
956 Main_Index : Int := 0;
958 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
959 -- the main program is the nnn unit in a multi-unit source file.
961 Mapping_File_Name : String_Ptr := null;
963 -- File name of mapping between unit names, file names and path names.
964 -- (given by switch -gnatem)
966 Maximum_Messages : Int := 9999;
968 -- Maximum default number of errors before compilation is terminated, or in
969 -- the case of GNAT, maximum number of warnings before further warnings are
970 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
972 Maximum_File_Name_Length : Int;
974 -- Maximum number of characters allowed in a file name, not counting the
975 -- extension, as set by the appropriate switch. If no switch is given,
976 -- then this value is initialized by Osint to the appropriate value.
978 Maximum_Instantiations : Int := 8000;
980 -- Maximum number of instantiations permitted (to stop runaway cases
981 -- of nested instantiations). These situations probably only occur in
982 -- specially concocted test cases. Can be modified by -gnateinn switch.
984 Maximum_Processes : Positive := 1;
985 -- GNATMAKE, GPRMAKE, GPRBUILD
986 -- Maximum number of processes that should be spawned to carry out
989 Minimal_Recompilation : Boolean := False;
991 -- Set to True if minimal recompilation mode requested
993 Multiple_Unit_Index : Int := 0;
995 -- This is set non-zero if the current unit is being compiled in multiple
996 -- unit per file mode, meaning that the current unit is selected from the
997 -- sequence of units in the current source file, using the value stored
998 -- in this variable (e.g. 2 = select second unit in file). A value of
999 -- zero indicates that we are in normal (one unit per file) mode.
1001 No_Backup : Boolean := False;
1003 -- Set by switch --no-backup.
1004 -- Do not create backup copies of project files.
1006 No_Deletion : Boolean := False;
1008 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies
1009 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all
1010 -- branches of #if constructs.
1012 No_Main_Subprogram : Boolean := False;
1013 -- GNATMAKE, GNATBIND
1014 -- Set to True if compilation/binding of a program without main
1015 -- subprogram requested.
1017 No_Run_Time_Mode : Boolean := False;
1019 -- This flag is set True if a No_Run_Time pragma is encountered. See
1020 -- spec of Rtsfind for a full description of handling of this pragma.
1022 No_Split_Units : Boolean := False;
1024 -- Set to True with switch --no-split-units. When True, unit sources, spec,
1025 -- body and subunits, must all be in the same project.This is checked after
1026 -- each compilation.
1028 No_Stdinc : Boolean := False;
1029 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
1030 -- Set to True if no default source search dirs added to search list
1032 No_Stdlib : Boolean := False;
1033 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
1034 -- Set to True if no default library search dirs added to search list
1036 No_Strict_Aliasing : Boolean := False;
1038 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
1040 Normalize_Scalars : Boolean := False;
1042 -- Set True if a pragma Normalize_Scalars applies to the current unit.
1043 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
1045 Object_Directory_Present : Boolean := False;
1047 -- Set to True when an object directory is specified with option -D
1049 Object_Path_File_Name : String_Ptr := null;
1051 -- Path of the temporary file that contains a list of object directories
1052 -- passed by -gnateO=<obj_path_file>.
1054 One_Compilation_Per_Obj_Dir : Boolean := False;
1055 -- GNATMAKE, GPRBUILD
1056 -- Set to True with switch --single-compile-per-obj-dir. When True, there
1057 -- cannot be simultaneous compilations with the object files in the same
1058 -- object directory, if project files are used.
1060 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
1061 Operating_Mode : Operating_Mode_Type := Generate_Code;
1063 -- Indicates the operating mode of the compiler. The default is generate
1064 -- code, which runs the parser, semantics and backend. Switches can be
1065 -- used to set syntax checking only mode, or syntax and semantics checking
1066 -- only mode. Operating_Mode can also be modified as a result of detecting
1067 -- errors during the compilation process. In particular if any serious
1068 -- error is detected then this flag is reset from Generate_Code to
1069 -- Check_Semantics after generating an error message.
1071 Optimize_Alignment : Character := 'O';
1072 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
1073 -- be modified by use of pragma Optimize_Alignment.
1075 Optimize_Alignment_Local : Boolean := False;
1076 -- Set True if Optimize_Alignment mode is set by a local configuration
1077 -- pragma that overrides the gnat.adc (or other configuration file) default
1078 -- so that the unit is not dependent on the default setting. Also always
1079 -- set True for internal units, since these always have a default setting
1080 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
1081 -- them all having such an explicit pragma in each unit).
1083 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
1085 -- Indicates the original operating mode of the compiler as set by compiler
1086 -- options. This is identical to Operating_Mode except that this is not
1087 -- affected by errors.
1089 Optimization_Level : Int;
1090 pragma Import (C, Optimization_Level, "optimize");
1091 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
1092 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
1093 -- GNAAMP back ends.
1095 Optimize_Size : Int;
1096 pragma Import (C, Optimize_Size, "optimize_size");
1097 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
1098 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
1099 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
1101 Output_File_Name_Present : Boolean := False;
1102 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
1103 -- Set to True when the output C file name is given with option -o for
1104 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
1105 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
1107 Output_Linker_Option_List : Boolean := False;
1109 -- True if output of list of linker options is requested (-K switch set)
1111 Output_ALI_List : Boolean := False;
1112 ALI_List_Filename : String_Ptr;
1114 -- True if output of list of ALIs is requested (-A switch set). List is
1115 -- output under the given filename, or standard output if not specified.
1117 Output_Object_List : Boolean := False;
1118 Object_List_Filename : String_Ptr;
1120 -- True if output of list of objects is requested (-O switch set). List is
1121 -- output under the given filename, or standard output if not specified.
1123 Partition_Elaboration_Policy : Character := ' ';
1125 -- Set to ' ' for the default case (no elaboration policy specified). Reset
1126 -- to first character (uppercase) of locking policy name if a valid pragma
1127 -- Partition_Elaboration_Policy is encountered.
1129 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location;
1131 -- Remember location of previous Partition_Elaboration_Policy pragma. This
1132 -- is used for inconsistency error messages. A value of System_Location is
1133 -- used if the policy is set in package System.
1135 Persistent_BSS_Mode : Boolean := False;
1137 -- True if a Persistent_BSS configuration pragma is in effect, causing
1138 -- potentially persistent data to be placed in the persistent_bss section.
1140 Pessimistic_Elab_Order : Boolean := False;
1142 -- True if pessimistic elaboration order is to be chosen (-p switch set)
1144 Polling_Required : Boolean := False;
1146 -- Set to True if polling for asynchronous abort is enabled by using
1147 -- the -gnatP option for GNAT.
1149 Preprocessing_Data_File : String_Ptr := null;
1151 -- Set by switch -gnatep=. The file name of the preprocessing data file.
1153 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4);
1154 -- An extensible array to temporarily stores symbol definitions specified
1155 -- on the command line with -gnateD switches.
1156 -- What is this magic constant 4 ???
1157 -- What is extensible about this fixed length array ???
1159 Preprocessing_Symbol_Last : Natural := 0;
1160 -- Index of last symbol definition in array Symbol_Definitions
1162 Print_Generated_Code : Boolean := False;
1164 -- Set to True to enable output of generated code in source form. This
1165 -- flag is set by the -gnatG switch.
1167 Print_Standard : Boolean := False;
1169 -- Set to true to enable printing of package standard in source form.
1170 -- This flag is set by the -gnatS switch
1172 type Usage is (Unknown, Not_In_Use, In_Use);
1173 Project_File_In_Use : Usage := Unknown;
1175 -- Indicates if a project file is used or not. Set to In_Use by the first
1178 Queuing_Policy : Character := ' ';
1180 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1181 -- first character (uppercase) of locking policy name if a valid
1182 -- Queuing_Policy pragma is encountered.
1184 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1186 -- Remember location of previous Queuing_Policy pragma. This is used for
1187 -- inconsistency error messages. A value of System_Location is used if the
1188 -- policy is set in package System.
1190 Quiet_Output : Boolean := False;
1191 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1192 -- Set to True if the tool should not have any output if there are no
1193 -- errors or warnings.
1195 Overriding_Renamings : Boolean := False;
1197 -- Set to True to enable compatibility mode with Rational compiler, and
1198 -- to accept renamings of implicit operations in their own scope.
1200 Relaxed_RM_Semantics : Boolean := False;
1202 -- Set to True to ignore some Ada semantic error to help parse legacy
1203 -- Ada code for use in e.g. static analysis (such as CodePeer). This
1204 -- deals with cases where other compilers allow illegal constructs. Tools
1205 -- such as CodePeer are interested in analyzing code rather than enforcing
1206 -- legality rules, so as long as these illegal constructs end up with code
1207 -- that can be handled by the tool in question, there is no reason to
1208 -- reject the code that is considered correct by the other compiler.
1210 Replace_In_Comments : Boolean := False;
1212 -- Set to True if -C switch used
1214 RTS_Lib_Path_Name : String_Ptr := null;
1215 RTS_Src_Path_Name : String_Ptr := null;
1217 -- Set to the "adalib" and "adainclude" directories of the run time
1218 -- specified by --RTS=.
1220 RTS_Switch : Boolean := False;
1221 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1222 -- Set to True when the --RTS switch is set
1224 Run_Path_Option : Boolean := True;
1225 -- GNATMAKE, GNATLINK
1226 -- Set to False when no run_path_option should be issued to the linker
1228 Search_Directory_Present : Boolean := False;
1230 -- Set to True when argument is -I. Reset to False when next argument, a
1231 -- search directory path is taken into account. Note that this is quite
1232 -- different from other switches in this section in that it is only set in
1233 -- a transitory manner as a result of scanning a -I switch with no file
1234 -- name, and if set, is an indication that the next argument is to be
1235 -- treated as a file name.
1237 Sec_Stack_Used : Boolean := False;
1239 -- Set True if generated code uses the System.Secondary_Stack package. For
1240 -- the binder, set if any unit uses the secondary stack package.
1242 Setup_Projects : Boolean := False;
1244 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1245 -- object, library and exec directories.
1247 Shared_Libgnat : Boolean;
1249 -- Set to True if a shared libgnat is requested by using the -shared option
1250 -- for GNATBIND and to False when using the -static option. The value of
1251 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1253 Short_Circuit_And_Or : Boolean := False;
1255 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1257 Short_Descriptors : Boolean := False;
1259 -- Set True if a pragma Short_Descriptors applies to the current unit.
1261 Special_Exception_Package_Used : Boolean := False;
1263 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
1264 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
1265 -- local raise statements into gotos in the presence of either package.
1267 Sprint_Line_Limit : Nat := 72;
1269 -- Limit values for chopping long lines in Sprint output, can be reset
1270 -- by use of NNN parameter with -gnatG or -gnatD switches.
1272 Stack_Checking_Enabled : Boolean;
1274 -- Set to indicate if -fstack-check switch is set for the compilation. True
1275 -- means that the switch is set, so that stack checking is enabled. False
1276 -- means that the switch is not set (no stack checking). This value is
1277 -- obtained from the external imported value flag_stack_check in the gcc
1278 -- backend (see Frontend) and may be referenced throughout the compilation
1281 Style_Check : Boolean := False;
1283 -- Set True to perform style checks. Activates checks carried out in
1284 -- package Style (see body of this package for details of checks). This
1285 -- flag is set True by use of either the -gnatg or -gnaty switches, or
1286 -- by the Style_Check pragma.
1288 Style_Check_Main : Boolean := False;
1290 -- Set True if Style_Check was set for the main unit. This is used to
1291 -- renable style checks for units in the mail extended source that get
1292 -- with'ed indirectly. It is set True by use of either the -gnatg or
1293 -- -gnaty switches, but not by use of the Style_Checks pragma.
1295 Suppress_All_Inlining : Boolean := False;
1297 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1298 -- regardless of any other switches that are set.
1300 Suppress_Control_Flow_Optimizations : Boolean := False;
1302 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1303 -- that interfere with coverage analysis based on the object code.
1305 System_Extend_Pragma_Arg : Node_Id := Empty;
1307 -- Set non-empty if and only if a correct Extend_System pragma was present
1308 -- in which case it points to the argument of the pragma, and the name can
1309 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1311 System_Extend_Unit : Node_Id := Empty;
1313 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1314 -- is never appropriate in GNAT_Mode (and causes troubles, including
1315 -- bogus circularities, if we try to compile the run-time library with
1316 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1317 -- is a copy of the value set in System_Extend_Pragma_Arg.
1319 Subunits_Missing : Boolean := False;
1321 -- This flag is set true if missing subunits are detected with code
1322 -- generation active. This causes code generation to be skipped.
1324 Suppress_Checks : Boolean := False;
1326 -- Set to True if -gnatp (suppress all checks) switch present.
1328 Suppress_Options : Suppress_Record;
1330 -- Indicates outer level setting of check suppression. This initializes
1331 -- the settings of the outer scope level in any unit compiled. This is
1332 -- initialized by Osint.Initialize, and further initialized by the
1333 -- Adjust_Global_Switches flag in Gnat1drv.
1335 Suppress_Back_Annotation : Boolean := False;
1337 -- This flag is set True if back annotation of representation information
1338 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1339 -- This avoids unnecessary time being spent on back annotation.
1341 Table_Factor : Int := 1;
1343 -- Factor by which all initial table sizes set in Alloc are multiplied.
1344 -- Used in Table to calculate initial table sizes (the initial table size
1345 -- is the value in Alloc, used as the Table_Initial parameter value,
1346 -- multiplied by the factor given here. The default value is used if no
1347 -- -gnatT switch appears.
1349 Tagged_Type_Expansion : Boolean := True;
1351 -- Set True if tagged types and interfaces should be expanded by the
1352 -- front-end. If False, the original tree is left unexpanded for tagged
1353 -- types and dispatching calls, assuming the underlying target supports
1354 -- it (e.g. in the JVM case).
1356 Target_Dependent_Info_Read_Name : String_Ptr := null;
1358 -- Set non-null to override the normal processing in Get_Targ and set the
1359 -- necessary information by reading the target dependent information file
1360 -- whose name is given here (see packages Get_Targ and Set_Targ for full
1361 -- details). Set to non-null file name by use of the -gnateT switch.
1363 Target_Dependent_Info_Write_Name : String_Ptr := null;
1365 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info
1366 -- which writes a target independent information file (see packages
1367 -- Get_Targ and Set_Targ for full details) using the name given by
1368 -- this switch. Set to non-null file name by use of the -gnatet switch.
1370 Task_Dispatching_Policy : Character := ' ';
1372 -- Set to ' ' for the default case (no task dispatching policy specified).
1373 -- Reset to first character (uppercase) of task dispatching policy name
1374 -- if a valid Task_Dispatching_Policy pragma is encountered.
1376 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1378 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1379 -- used for inconsistency error messages. A value of System_Location is
1380 -- used if the policy is set in package System.
1382 Tasking_Used : Boolean := False;
1383 -- Set True if any tasking construct is encountered. Used to activate the
1384 -- output of the Q, L and T lines in ALI files.
1386 Time_Slice_Set : Boolean := False;
1388 -- Set True if a pragma Time_Slice is processed in the main unit, or
1389 -- if the -gnatTnn switch is present to set a time slice value.
1391 Time_Slice_Value : Nat;
1393 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1394 -- Time_Slice pragma has been processed. Set to the time slice value in
1395 -- microseconds. Negative values are stored as zero, and the value is not
1396 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1397 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1399 Tolerate_Consistency_Errors : Boolean := False;
1401 -- Tolerate time stamp and other consistency errors. If this flag is set to
1402 -- True (-t), then inconsistencies result in warnings rather than errors.
1404 Treat_Categorization_Errors_As_Warnings : Boolean := False;
1405 -- Normally categorization errors are true illegalities. If this switch
1406 -- is set, then such errors result in warning messages rather than error
1407 -- messages. Set True by -gnateP (P for Pure/Preelaborate).
1409 Treat_Restrictions_As_Warnings : Boolean := False;
1411 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1414 Tree_Output : Boolean := False;
1416 -- Set to True (-gnatt) to generate output tree file
1418 True_VMS_Target : Boolean := False;
1419 -- Set True if we are on a VMS target. The setting of this flag reflects
1420 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1421 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1422 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1424 Try_Semantics : Boolean := False;
1426 -- Flag set to force attempt at semantic analysis, even if parser errors
1427 -- occur. This will probably cause blowups at this stage in the game. On
1428 -- the other hand, most such blowups will be caught cleanly and simply
1429 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ.
1431 Unchecked_Shared_Lib_Imports : Boolean := False;
1433 -- Set to True when shared library projects are allowed to import projects
1434 -- that are not shared library projects. Set on by use of the switch
1435 -- --unchecked-shared-lib-imports.
1437 Undefined_Symbols_Are_False : Boolean := False;
1439 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1440 -- file for the compiler. Indicates that while preprocessing sources,
1441 -- symbols that are not defined have the value FALSE.
1443 Unique_Error_Tag : Boolean := Tag_Errors;
1445 -- Indicates if error messages are to be prefixed by the string error:
1446 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1448 Universal_Addressing_On_AAMP : Boolean := False;
1450 -- Indicates if library-level objects should be accessed and updated using
1451 -- universal addressing instructions on the AAMP architecture. This flag is
1452 -- set to True when pragma Universal_Data is given as a configuration
1455 Unreserve_All_Interrupts : Boolean := False;
1457 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1458 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1459 -- corresponding attribute set in GNATBIND.
1461 Upper_Half_Encoding : Boolean := False;
1463 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1464 -- used in the normal way to represent themselves. If the wide character
1465 -- encoding method uses the upper bit for this encoding, then this flag is
1466 -- set True, and upper half characters in the source indicate the start of
1467 -- a wide character sequence. Set by -gnatW or -W switches.
1469 Use_Include_Path_File : Boolean := False;
1470 -- GNATMAKE, GPRBUILD
1471 -- When True, create a source search path file, even when a mapping file
1474 Usage_Requested : Boolean := False;
1475 -- GNAT, GNATBIND, GNATMAKE
1476 -- Set to True if -h (-gnath for the compiler) switch encountered
1477 -- requesting usage information
1479 Use_Pragma_Linker_Constructor : Boolean := False;
1481 -- True if pragma Linker_Constructor applies to adainit
1483 Use_VADS_Size : Boolean := False;
1485 -- Set to True if a valid pragma Use_VADS_Size is processed
1487 Validity_Checks_On : Boolean := True;
1489 -- This flag determines if validity checking is on or off. The initial
1490 -- state is on, and the required default validity checks are active. The
1491 -- actual set of checks that is performed if Validity_Checks_On is set is
1492 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1493 -- is controlled by pragma Validity_Checks (On | Off), and also some
1494 -- generated compiler code (typically code that has to do with validity
1495 -- check generation) is compiled with this flag set to False. This flag is
1496 -- set to False by the -gnatp switch.
1498 Verbose_Mode : Boolean := False;
1499 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1500 -- GPRMAKE, GPRBUILD, GPRCLEAN
1501 -- Set to True to get verbose mode (full error message text and location
1502 -- information sent to standard output, also header, copyright and summary)
1504 type Verbosity_Level_Type is (None, Low, Medium, High);
1505 pragma Ordered (Verbosity_Level_Type);
1506 Verbosity_Level : Verbosity_Level_Type := High;
1507 -- GNATMAKE, GPRMAKE
1508 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1509 -- the level of verbosity of informational messages:
1511 -- In Low Verbosity, the reasons why a source is recompiled, the name
1512 -- of the executable and the reason it must be rebuilt is output.
1514 -- In Medium Verbosity, additional lines are output for each ALI file
1517 -- In High Verbosity, additional lines are output when the ALI file
1518 -- is part of an Ada library, is read-only or is part of the runtime.
1520 Warn_On_Ada_2005_Compatibility : Boolean := True;
1522 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1523 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1524 -- mode. Set by default, modified by use of -gnatwy/Y.
1526 Warn_On_Ada_2012_Compatibility : Boolean := True;
1528 -- Set to True to generate all warnings on Ada 2012 compatibility issues,
1529 -- including warnings on Ada 2012 obsolescent features used in Ada 2012
1530 -- mode. Modified by use of -gnatwy/Y.
1532 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1534 -- Set to True to generate warnings in all cases where a variable is
1535 -- modified by being passed as to an OUT formal, but the resulting value is
1536 -- never read. The default is that this warning is suppressed. Modified
1537 -- by use of gnatw.o/.O.
1539 Warn_On_Assertion_Failure : Boolean := True;
1541 -- Set to True to activate warnings on assertions that can be determined
1542 -- at compile time will always fail. Modified by use of -gnatw.a/.A.
1544 Warn_On_Assumed_Low_Bound : Boolean := True;
1546 -- Set to True to activate warnings for string parameters that are indexed
1547 -- with literals or S'Length, presumably assuming a lower bound of one.
1548 -- Modified by use of -gnatww/W.
1550 Warn_On_Atomic_Synchronization : Boolean := False;
1552 -- Set to True to generate information messages for atomic synchronization.
1553 -- Modified by use of -gnatw.n/.N.
1555 Warn_On_Bad_Fixed_Value : Boolean := False;
1557 -- Set to True to generate warnings for static fixed-point expression
1558 -- values that are not an exact multiple of the small value of the type.
1559 -- Odd by default, modified by use of -gnatwb/B.
1561 Warn_On_Biased_Representation : Boolean := True;
1563 -- Set to True to generate warnings for size clauses, component clauses
1564 -- and component_size clauses that force biased representation. Modified
1565 -- by use of -gnatw.b/.B.
1567 Warn_On_Constant : Boolean := False;
1569 -- Set to True to generate warnings for variables that could be declared
1570 -- as constants. Modified by use of -gnatwk/K.
1572 Warn_On_Deleted_Code : Boolean := False;
1574 -- Set to True to generate warnings for code deleted by the front end
1575 -- for conditional statements whose outcome is known at compile time.
1576 -- Modified by use of -gnatwt/T.
1578 Warn_On_Dereference : Boolean := False;
1580 -- Set to True to generate warnings for implicit dereferences for array
1581 -- indexing and record component access. Modified by use of -gnatwd/D.
1583 Warn_On_Export_Import : Boolean := True;
1585 -- Set to True to generate warnings for suspicious use of export or
1586 -- import pragmas. Modified by use of -gnatwx/X.
1588 Warn_On_Hiding : Boolean := False;
1590 -- Set to True to generate warnings if a declared entity hides another
1591 -- entity. The default is that this warning is suppressed. Modified by
1592 -- use of -gnatwh/H.
1594 Warn_On_Modified_Unread : Boolean := False;
1596 -- Set to True to generate warnings if a variable is assigned but is never
1597 -- read. Also controls warnings for similar cases involving out parameters,
1598 -- but only if there is only one out parameter for the procedure involved.
1599 -- The default is that this warning is suppressed, modified by use of
1602 Warn_On_No_Value_Assigned : Boolean := True;
1604 -- Set to True to generate warnings if no value is ever assigned to a
1605 -- variable that is at least partially uninitialized. Set to false to
1606 -- suppress such warnings. The default is that such warnings are enabled.
1607 -- Modified by use of -gnatwv/V.
1609 Warn_On_Non_Local_Exception : Boolean := False;
1611 -- Set to True to generate warnings for non-local exception raises and also
1612 -- handlers that can never handle a local raise. This warning is only ever
1613 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1614 -- default is not to generate the warnings except that if the source has
1615 -- at least one exception handler, and this restriction is set, and the
1616 -- warning was not explicitly turned off, then it is turned on by default.
1617 -- Modified by use of -gnatw.x/.X.
1619 No_Warn_On_Non_Local_Exception : Boolean := False;
1621 -- This is set to True if the above warning is explicitly suppressed. We
1622 -- use this to avoid turning it on by default when No_Exception_Propagation
1623 -- restriction is set and an exception handler is present.
1625 Warn_On_Object_Renames_Function : Boolean := False;
1627 -- Set to True to generate warnings when a function result is renamed as
1628 -- an object. The default is that this warning is disabled. Modified by
1629 -- use of -gnatw.r/.R.
1631 Warn_On_Obsolescent_Feature : Boolean := False;
1633 -- Set to True to generate warnings on use of any feature in Annex or if a
1634 -- subprogram is called for which a pragma Obsolescent applies. Modified
1635 -- by use of -gnatwj/J.
1637 Warn_On_Overlap : Boolean := False;
1639 -- Set to True to generate warnings when a writable actual overlaps with
1640 -- another actual in a subprogram call. This applies only in modes before
1641 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal.
1642 -- Modified by use of -gnatw.i/.I.
1644 Warn_On_Questionable_Missing_Parens : Boolean := True;
1646 -- Set to True to generate warnings for cases where parentheses are missing
1647 -- and the usage is questionable, because the intent is unclear. On by
1648 -- default, modified by use of -gnatwq/Q.
1650 Warn_On_Parameter_Order : Boolean := False;
1652 -- Set to True to generate warnings for cases where the argument list for
1653 -- a call is a sequence of identifiers that match the formal identifiers,
1654 -- but are in the wrong order.
1656 Warn_On_Redundant_Constructs : Boolean := False;
1658 -- Set to True to generate warnings for redundant constructs (e.g. useless
1659 -- assignments/conversions). The default is that this warning is disabled.
1660 -- Modified by use of -gnatwr/R.
1662 Warn_On_Reverse_Bit_Order : Boolean := True;
1664 -- Set to True to generate warning (informational) messages for component
1665 -- clauses that are affected by non-standard bit-order. The default is
1666 -- that this warning is enabled. Modified by -gnatw.v/.V.
1668 Warn_On_Suspicious_Contract : Boolean := True;
1670 -- Set to True to generate warnings for suspicious contracts expressed as
1671 -- pragmas or aspects precondition and postcondition. The default is that
1672 -- this warning is enabled. Modified by use of -gnatw.t/.T.
1674 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1676 -- Set to True to generate warnings for suspicious modulus values. The
1677 -- default is that this warning is enabled. Modified by -gnatw.m/.M.
1679 Warn_On_Unchecked_Conversion : Boolean := True;
1681 -- Set to True to generate warnings for unchecked conversions that may have
1682 -- non-portable semantics (e.g. because sizes of types differ). Modified
1683 -- by use of -gnatwz/Z.
1685 Warn_On_Unordered_Enumeration_Type : Boolean := False;
1687 -- Set to True to generate warnings for inappropriate uses (comparisons
1688 -- and explicit ranges) on unordered enumeration types (which includes
1689 -- all enumeration types for which pragma Ordered is not given). The
1690 -- default is that this warning is disabled. Modified by -gnat.u/.U.
1692 Warn_On_Unrecognized_Pragma : Boolean := True;
1694 -- Set to True to generate warnings for unrecognized pragmas. The default
1695 -- is that this warning is enabled. Modified by use of -gnatwg/G.
1697 Warn_On_Unrepped_Components : Boolean := False;
1699 -- Set to True to generate warnings for the case of components of record
1700 -- which have a record representation clause but this component does not
1701 -- have a component clause. Modified by use of -gnatw.c/.C.
1703 Warn_On_Warnings_Off : Boolean := False;
1705 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1706 -- where either the pragma is never used, or it could be replaced by a
1707 -- pragma Unmodified or Unreferenced. Modified by use of -gnatw.w/.W.
1709 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1710 Warning_Mode : Warning_Mode_Type := Normal;
1712 -- Controls treatment of warning messages. If set to Suppress, warning
1713 -- messages are not generated at all. In Normal mode, they are generated
1714 -- but do not count as errors. In Treat_As_Error mode, warning messages
1715 -- are generated and are treated as errors.
1717 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1719 -- Method used for encoding wide characters in the source program. See
1720 -- description of type in unit System.WCh_Con for a list of the methods
1721 -- that are currently supported. Note that brackets notation is always
1722 -- recognized in source programs regardless of the setting of this
1723 -- variable. The default setting causes only the brackets notation to be
1724 -- recognized. If this is the main unit, this setting also controls the
1725 -- output of the W=? parameter in the ALI file, which is used to provide
1726 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1727 -- the value set here overrides this main unit default.
1729 Wide_Character_Encoding_Method_Specified : Boolean := False;
1731 -- Set True if the value in Wide_Character_Encoding_Method was set as
1732 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1734 Xref_Active : Boolean := True;
1736 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1738 Zero_Formatting : Boolean := False;
1740 -- Do no formatting (no title, no leading spaces, no empty lines) in
1741 -- auxiliary outputs (-e, -K, -l, -R).
1743 ----------------------------
1744 -- Configuration Settings --
1745 ----------------------------
1747 -- These are settings that are used to establish the mode at the start of
1748 -- each unit. The values defined below can be affected either by command
1749 -- line switches, or by the use of appropriate configuration pragmas in a
1750 -- configuration pragma file.
1752 Ada_Version_Config : Ada_Version_Type;
1754 -- This is the value of the configuration switch for the Ada 83 mode, as
1755 -- set by the command line switches -gnat83/95/2005/2012, and possibly
1756 -- modified by the use of configuration pragmas Ada_*. This switch is used
1757 -- to set the initial value for Ada_Version mode at the start of analysis
1758 -- of a unit. Note however that the setting of this flag is ignored for
1759 -- internal and predefined units (which are always compiled in the most up
1760 -- to date version of Ada).
1762 Ada_Version_Pragma_Config : Node_Id;
1763 -- This will be set non empty if it is set by a configuration pragma
1765 Ada_Version_Explicit_Config : Ada_Version_Type;
1767 -- This is set in the same manner as Ada_Version_Config. The difference is
1768 -- that the setting of this flag is not ignored for internal and predefined
1769 -- units, which for some purposes do indeed access this value, regardless
1770 -- of the fact that they are compiled the most up to date ada version).
1772 Assertions_Enabled_Config : Boolean;
1774 -- This is the value of the configuration switch for assertions enabled
1775 -- mode, as possibly set by the command line switch -gnata, and possibly
1776 -- modified by the use of the configuration pragma Assertion_Policy.
1778 Assume_No_Invalid_Values_Config : Boolean;
1780 -- This is the value of the configuration switch for assuming "no invalid
1781 -- values enabled" mode, as possibly set by the command line switch
1782 -- -gnatB, and possibly modified by the use of the configuration pragma
1783 -- Assume_No_Invalid_Values.
1785 Check_Float_Overflow_Config : Boolean;
1787 -- Set to True to check that operations on predefined unconstrained float
1788 -- types (e.g. Float, Long_Float) do not overflow and generate infinities
1789 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use
1790 -- of the -gnateF switch.
1792 Check_Policy_List_Config : Node_Id;
1794 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1795 -- that are linked through the Next_Pragma fields, with the list being
1796 -- terminated by Empty. The order is most recently processed first. This
1797 -- list includes only those pragmas in configuration pragma files.
1799 Default_Pool_Config : Node_Id := Empty;
1801 -- Same as Default_Pool above, except this is only for Default_Storage_Pool
1802 -- pragmas that are configuration pragmas.
1804 Dynamic_Elaboration_Checks_Config : Boolean := False;
1806 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1807 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1809 Exception_Locations_Suppressed_Config : Boolean := False;
1811 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1813 Extensions_Allowed_Config : Boolean;
1815 -- This is the flag that indicates whether extensions are allowed. It can
1816 -- be set True either by use of the -gnatX switch, or by use of the
1817 -- configuration pragma Extensions_Allowed (On). It is always set to True
1818 -- for internal GNAT units, since extensions are always permitted in such
1821 External_Name_Exp_Casing_Config : External_Casing_Type;
1823 -- This is the value of the configuration switch that controls casing of
1824 -- external symbols for which an explicit external name is given. It can be
1825 -- set to Uppercase by the command line switch -gnatF, and further modified
1826 -- by the use of the configuration pragma External_Name_Casing in the
1827 -- gnat.adc file. This flag is used to set the initial value for
1828 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1829 -- however that the setting of this flag is ignored for internal and
1830 -- predefined units (which are always compiled with As_Is mode).
1832 External_Name_Imp_Casing_Config : External_Casing_Type;
1834 -- This is the value of the configuration switch that controls casing of
1835 -- external symbols where the external name is implicitly given. It can be
1836 -- set to Uppercase by the command line switch -gnatF, and further modified
1837 -- by the use of the configuration pragma External_Name_Casing in the
1838 -- gnat.adc file. This flag is used to set the initial value for
1839 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1840 -- however that the setting of this flag is ignored for internal and
1841 -- predefined units (which are always compiled with Lowercase mode).
1843 Fast_Math_Config : Boolean;
1845 -- This is the value of the configuration switch that controls Fast_Math
1846 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1847 -- used to set the initial value of Fast_Math at the start of each new
1848 -- compilation unit.
1850 Initialize_Scalars_Config : Boolean;
1852 -- This is the value of the configuration switch that is set by the
1853 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1854 -- This switch is not set when the pragma appears ahead of a given
1855 -- unit, so it does not affect the compilation of other units.
1857 Optimize_Alignment_Config : Character;
1859 -- This is the value of the configuration switch that controls the
1860 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1861 -- It is used to set the initial value of Optimize_Alignment at the start
1862 -- of each new compilation unit, except that it is always set to 'O' (off)
1863 -- for internal units.
1865 Persistent_BSS_Mode_Config : Boolean;
1867 -- This is the value of the configuration switch that controls whether
1868 -- potentially persistent data is to be placed in the persistent_bss
1869 -- section. It can be set True by use of the pragma Persistent_BSS.
1870 -- This flag is used to set the initial value of Persistent_BSS_Mode
1871 -- at the start of each compilation unit, except that it is always
1872 -- set False for predefined units.
1874 Polling_Required_Config : Boolean;
1876 -- This is the value of the configuration switch that controls polling
1877 -- mode. It can be set True by the command line switch -gnatP, and then
1878 -- further modified by the use of pragma Polling in the gnat.adc file. This
1879 -- flag is used to set the initial value for Polling_Required at the start
1880 -- of analyzing each unit.
1882 Short_Descriptors_Config : Boolean;
1884 -- This is the value of the configuration switch that controls the use of
1885 -- Short_Descriptors for setting descriptor default sizes. It can be set
1886 -- True by the use of the pragma Short_Descriptors in the gnat.adc file.
1887 -- This flag is used to set the initial value for Short_Descriptors at the
1888 -- start of analyzing each unit.
1890 Use_VADS_Size_Config : Boolean;
1892 -- This is the value of the configuration switch that controls the use of
1893 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1894 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1895 -- This flag is used to set the initial value for Use_VADS_Size at the
1896 -- start of analyzing each unit. Note however that the setting of this flag
1897 -- is ignored for internal and predefined units (which are always compiled
1898 -- with the standard Size semantics).
1900 type Config_Switches_Type is private;
1901 -- Type used to save values of the switches set from Config values
1903 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1904 -- This procedure saves the current values of the switches which are
1905 -- initialized from the above Config values, and then resets these switches
1906 -- according to the Config value settings.
1908 procedure Set_Opt_Config_Switches
1909 (Internal_Unit : Boolean;
1910 Main_Unit : Boolean);
1911 -- This procedure sets the switches to the appropriate initial values. The
1912 -- parameter Internal_Unit is True for an internal or predefined unit, and
1913 -- affects the way the switches are set (see above). Main_Unit is true if
1914 -- switches are being set for the main unit (this affects setting of the
1915 -- assert/debug pragma switches, which are normally set false by default
1916 -- for an internal unit, except when the internal unit is the main unit,
1917 -- in which case we use the command line settings).
1919 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1920 -- This procedure restores a set of switch values previously saved by a
1921 -- call to Save_Opt_Switches.
1923 procedure Register_Opt_Config_Switches;
1924 -- This procedure is called after processing the gnat.adc file and other
1925 -- configuration pragma files to record the values of the Config switches,
1926 -- as possibly modified by the use of command line switches and pragmas
1927 -- appearing in these files.
1929 ------------------------
1930 -- Other Global Flags --
1931 ------------------------
1933 Expander_Active : Boolean := False;
1934 -- A flag that indicates if expansion is active (True) or deactivated
1935 -- (False). When expansion is deactivated all calls to expander routines
1936 -- have no effect. Note that the initial setting of False is merely to
1937 -- prevent saving of an undefined value for an initial call to the
1938 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1939 -- this flag, see package Expander. Indeed this flag might more logically
1940 -- be in the spec of Expander, but it is referenced by Errout, and it
1941 -- really seems wrong for Errout to depend on Expander.
1943 -- Note: for many purposes, it is more appropriate to test the flag
1944 -- Full_Expander_Active, which also checks that SPARK mode is not active.
1946 Static_Dispatch_Tables : Boolean := True;
1947 -- This flag indicates if the backend supports generation of statically
1948 -- allocated dispatch tables. If it is True, then the front end will
1949 -- generate static aggregates for dispatch tables that contain forward
1950 -- references to addresses of subprograms not seen yet, and the back end
1951 -- must be prepared to handle this case. If it is False, then the front
1952 -- end generates assignments to initialize the dispatch table, and there
1953 -- are no such forward references. By default we build statically allocated
1954 -- dispatch tables for all library level tagged types in all platforms.This
1955 -- behavior can be disabled using switch -gnatd.t which will set this flag
1956 -- to False and revert to the previous dynamic behavior.
1958 -----------------------
1959 -- Tree I/O Routines --
1960 -----------------------
1962 procedure Tree_Read;
1963 -- Reads switch settings from current tree file using Tree_Read
1965 procedure Tree_Write;
1966 -- Writes out switch settings to current tree file using Tree_Write
1968 --------------------------
1969 -- ASIS Version Control --
1970 --------------------------
1972 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1973 -- are supposed to be used in the GNAT/ASIS version check performed in
1974 -- the ASIS code (this package is also a part of the ASIS implementation).
1975 -- They are set by Tree_Read procedure, so they represent the version
1976 -- number (and the version string) of the compiler which has created the
1977 -- tree, and they are supposed to be compared with the corresponding values
1978 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1981 Tree_Version_String : String_Access;
1982 -- Used to store the compiler version string read from a tree file to check
1983 -- if it is from the same date as stored in the version string in Gnatvsn.
1984 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1985 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1986 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1987 -- of the corresponding source sets, using version strings that may be
1988 -- of different lengths.
1990 Tree_ASIS_Version_Number : Int;
1991 -- Used to store the ASIS version number read from a tree file to check if
1992 -- it is the same as stored in the ASIS version number in Tree_IO.
1994 -----------------------------------
1995 -- Modes for Formal Verification --
1996 -----------------------------------
1998 Frame_Condition_Mode : Boolean := False;
1999 -- Specific mode to be used in combination with SPARK_Mode. If set to
2000 -- true, ALI files containing the frame conditions (global effects) are
2001 -- generated, and Why files are *not* generated. If not true, Why files
2002 -- are generated. Set by debug flag -gnatd.G.
2004 Formal_Extensions : Boolean := False;
2005 -- When this flag is set, new aspects/pragmas/attributes are accepted,
2006 -- whose main purpose is to facilitate formal verification. Set by debug
2009 Global_SPARK_Mode : SPARK_Mode_Id := None;
2010 -- The mode applicable to the whole compilation. The global mode can be set
2011 -- in a configuration file such as gnat.adc.
2013 SPARK_Mode : Boolean := False;
2014 -- Specific compiling mode targeting formal verification through the
2015 -- generation of Why code for those parts of the input code that belong to
2016 -- the SPARK 2014 subset of Ada. Set True by the gnat2why executable or by
2017 -- use of the -gnatd.F debug switch. Note that this is completely separate
2018 -- from the SPARK restriction defined in GNAT to detect violations of a
2019 -- subset of SPARK 2005 rules.
2021 SPARK_Strict_Mode : Boolean := False;
2022 -- Interpret compiler permissions as strictly as possible. E.g. base ranges
2023 -- for integers are limited to the strict minimum with this option. Set by
2024 -- debug flag -gnatd.D.
2026 function Full_Expander_Active return Boolean;
2027 pragma Inline (Full_Expander_Active);
2028 -- Returns the value of (Expander_Active and not SPARK_Mode). This "flag"
2029 -- indicates that expansion is fully active, that is, not in the reduced
2030 -- mode for SPARK (True) or that expansion is either deactivated, or active
2031 -- in the reduced mode for SPARK (False). For more information on full
2032 -- expansion, see package Expander. For more information on reduced
2033 -- SPARK expansion, see package Exp_SPARK.
2037 -- The following type is used to save and restore settings of switches in
2038 -- Opt that represent the configuration (i.e. result of config pragmas).
2040 -- Note that Ada_Version_Explicit is not included, since this is a sticky
2041 -- flag that once set does not get reset, since the whole idea of this flag
2042 -- is to record the setting for the main unit.
2044 type Config_Switches_Type is record
2045 Ada_Version : Ada_Version_Type;
2046 Ada_Version_Explicit : Ada_Version_Type;
2047 Ada_Version_Pragma : Node_Id;
2048 Assertions_Enabled : Boolean;
2049 Assume_No_Invalid_Values : Boolean;
2050 Check_Float_Overflow : Boolean;
2051 Check_Policy_List : Node_Id;
2052 Default_Pool : Node_Id;
2053 Dynamic_Elaboration_Checks : Boolean;
2054 Exception_Locations_Suppressed : Boolean;
2055 Extensions_Allowed : Boolean;
2056 External_Name_Exp_Casing : External_Casing_Type;
2057 External_Name_Imp_Casing : External_Casing_Type;
2058 Fast_Math : Boolean;
2059 Initialize_Scalars : Boolean;
2060 Normalize_Scalars : Boolean;
2061 Optimize_Alignment : Character;
2062 Optimize_Alignment_Local : Boolean;
2063 Persistent_BSS_Mode : Boolean;
2064 Polling_Required : Boolean;
2065 Short_Descriptors : Boolean;
2066 Use_VADS_Size : Boolean;
2069 -- The following declarations are for GCC version dependent flags. We do
2070 -- not let client code in the compiler test GCC_Version directly, but
2071 -- instead use deferred constants for relevant feature tags.
2073 -- Note: there currently are no such constants defined in this section,
2074 -- since the compiler front end is currently entirely independent of the
2075 -- GCC version, which is a desirable state of affairs.
2077 function get_gcc_version return Int;
2078 pragma Import (C, get_gcc_version, "get_gcc_version");
2080 GCC_Version : constant Nat := get_gcc_version;
2082 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
2083 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.