1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This package contains global flags set by the initialization routine from
33 -- the command line and referenced throughout the compiler, the binder, or
34 -- other GNAT tools. The comments indicate which options are used by which
35 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
37 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
38 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
39 -- driver, gnatclean, gprbuild and gprclean.
41 with Hostparm
; use Hostparm
;
42 with Types
; use Types
;
44 pragma Warnings
(Off
);
45 -- This package is used also by gnatcoll
46 with System
.Strings
; use System
.Strings
;
47 with System
.WCh_Con
; use System
.WCh_Con
;
52 ----------------------------------------------
53 -- Settings of Modes for Current Processing --
54 ----------------------------------------------
56 -- The following mode values represent the current state of processing.
57 -- The values set here are the default values. Unless otherwise noted,
58 -- the value may be reset in Switch-? with an appropriate switch. In
59 -- some cases, the values can also be modified by pragmas, and in the
60 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
61 -- the default values.
63 Ada_Bind_File
: Boolean := True;
65 -- Set True if binder file to be generated in Ada rather than C
67 type Ada_Version_Type
is (Ada_83
, Ada_95
, Ada_05
, Ada_12
);
68 -- Versions of Ada for Ada_Version below. Note that these are ordered,
69 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
71 Ada_2005
: Ada_Version_Type
renames Ada_05
;
72 Ada_2012
: Ada_Version_Type
renames Ada_12
;
73 -- Renamings with full names (preferred usage)
75 Ada_Version_Default
: constant Ada_Version_Type
:= Ada_05
;
76 pragma Warnings
(Off
, Ada_Version_Default
);
78 -- Default Ada version if no switch given. The Warnings off is to kill
79 -- constant condition warnings.
81 Ada_Version
: Ada_Version_Type
:= Ada_Version_Default
;
83 -- Current Ada version for compiler, as set by configuration pragmas,
84 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
85 -- predefined or internal file is compiled.
87 Ada_Version_Explicit
: Ada_Version_Type
:= Ada_Version_Default
;
89 -- Like Ada_Version, but does not get set implicitly for predefined
90 -- or internal units, so it reflects the Ada version explicitly set
91 -- using configuration pragmas or compiler switches (or if neither
92 -- appears, it remains set to Ada_Version_Default). This is used in
93 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
94 -- where in the run-time we want the explicit version set.
96 Ada_Version_Runtime
: Ada_Version_Type
:= Ada_12
;
98 -- Ada version used to compile the runtime. Used to set Ada_Version (but
99 -- not Ada_Version_Explicit) when compiling predefined or internal units.
101 Ada_Final_Suffix
: constant String := "final";
102 Ada_Final_Name
: String_Ptr
:= new String'("ada" & Ada_Final_Suffix);
104 -- The name of the procedure that performs the finalization at the end of
105 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
107 Ada_Init_Suffix : constant String := "init";
108 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix
);
110 -- The name of the procedure that performs initialization at the start
111 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
113 Ada_Main_Name_Suffix
: constant String := "main";
115 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
116 -- can be referenced in a uniform manner to create either the default
117 -- value of Ada_Main_Name (declared below), or the non-default name
118 -- set by Gnatbind.Scan_Bind_Arg.
120 Ada_Main_Name
: String_Ptr
:= new String'("ada_" & Ada_Main_Name_Suffix);
122 -- The name of the Ada package generated by the binder (when in Ada mode).
123 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
125 Address_Clause_Overlay_Warnings : Boolean := True;
127 -- Set False to disable address clause warnings
129 Address_Is_Private : Boolean := False;
131 -- Set True if package System has the line "type Address is private;"
133 All_Errors_Mode : Boolean := False;
135 -- Flag set to force display of multiple errors on a single line and
136 -- also repeated error messages for references to undefined identifiers
137 -- and certain other repeated error messages. Set by use of -gnatf.
139 All_Sources : Boolean := False;
141 -- Set to True to require all source files to be present. This flag is
142 -- directly modified by gnatmake to affect the shared binder routines.
144 Alternate_Main_Name : String_Ptr := null;
146 -- Set to non null when Bind_Alternate_Main_Name is True. This value
147 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
149 ASIS_Mode : Boolean := False;
151 -- Enable semantic checks and tree transformations that are important
152 -- for ASIS but that are usually skipped if Operating_Mode is set to
153 -- Check_Semantics. This flag does not have the corresponding option to set
154 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
155 -- from the code of GNSA-based tool (a client may need to set ON the
156 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
157 -- make very much sense, because GNSA cannot do back annotation).
159 Assertions_Enabled : Boolean := False;
161 -- Enable assertions made using pragma Assert
163 Assume_No_Invalid_Values : Boolean := False;
165 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
166 -- that values could have invalid representations, unless it can clearly
167 -- prove that the values are valid. If this switch is set (by -gnatB or by
168 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
169 -- are valid and in range of their representations. This feature is now
170 -- fully enabled in the compiler.
172 Back_Annotate_Rep_Info : Boolean := False;
174 -- If set True, enables back annotation of representation information
175 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
176 -- (list representation information) or -gnatt (generate tree). It is
177 -- also set true if certain Unchecked_Conversion instantiations require
178 -- checking based on annotated values.
180 Back_End_Handles_Limited_Types : Boolean;
181 -- This flag is set true if the back end can properly handle limited or
182 -- other by reference types, and avoid copies. If this flag is False, then
183 -- the front end does special expansion for conditional expressions to make
184 -- sure that no copy occurs. If the flag is True, then the expansion for
185 -- conditional expressions relies on the back end properly handling things.
186 -- Currently the default is False for all cases (set in gnat1drv). The
187 -- default can be modified using -gnatd.L (sets the flag True).
189 Bind_Alternate_Main_Name : Boolean := False;
191 -- True if main should be called Alternate_Main_Name.all.
192 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
194 Bind_Main_Program : Boolean := True;
196 -- Set to False if not binding main Ada program
198 Bind_For_Library : Boolean := False;
200 -- Set to True if the binder needs to generate a file designed for building
201 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
203 Bind_Only : Boolean := False;
204 -- GNATMAKE, GPRMAKE, GPRBUILD
205 -- Set to True to skip compile and link steps
206 -- (except when Compile_Only and/or Link_Only are True).
208 Blank_Deleted_Lines : Boolean := False;
210 -- Output empty lines for each line of preprocessed input that is deleted
211 -- in the output, including preprocessor lines starting with a '#
'.
213 Brief_Output : Boolean := False;
215 -- Force brief error messages to standard error, even if verbose mode is
216 -- set (so that main error messages go to standard output).
218 Build_Bind_And_Link_Full_Project : Boolean := False;
220 -- Set to True to build, bind and link all the sources of a project file
223 Check_Object_Consistency : Boolean := False;
224 -- GNATBIND, GNATMAKE
225 -- Set to True to check whether every object file is consistent with
226 -- its corresponding ada library information (ALI) file. An object
227 -- file is inconsistent with the corresponding ALI file if the object
228 -- file does not exist or if it has an older time stamp than the ALI file.
229 -- Default above is for GNATBIND. GNATMAKE overrides this default to
230 -- True (see Make.Initialize) since we normally do need to check source
231 -- consistencies in gnatmake.
233 Check_Only : Boolean := False;
235 -- Set to True to do checks only, no output of binder file
237 Check_Policy_List : Node_Id := Empty;
239 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
240 -- that are linked through the Next_Pragma fields, with the list being
241 -- terminated by Empty. The order is most recently processed first. Note
242 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
243 -- of this variable, implementing the required scope control for pragmas
244 -- appearing a declarative part.
246 Check_Readonly_Files : Boolean := False;
248 -- Set to True to check readonly files during the make process
250 Check_Source_Files : Boolean := True;
251 -- GNATBIND, GNATMAKE
252 -- Set to True to enable consistency checking for any source files that
253 -- are present (i.e. date must match the date in the library info file).
254 -- Set to False for object file consistency check only. This flag is
255 -- directly modified by gnatmake, to affect the shared binder routines.
257 Check_Switches : Boolean := False;
258 -- GNATMAKE, GPRMAKE, GPBUILD
259 -- Set to True to check compiler options during the make process
261 Check_Unreferenced : Boolean := False;
263 -- Set to True to enable checking for unreferenced entities other
264 -- than formal parameters (for which see Check_Unreferenced_Formals)
266 Check_Unreferenced_Formals : Boolean := False;
268 -- Set True to check for unreferenced formals. This is turned on by
269 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
271 Check_Withs : Boolean := False;
273 -- Set to True to enable checking for unused withs, and also the case
274 -- of withing a package and using none of the entities in the package.
276 CodePeer_Mode : Boolean := False;
278 -- Enable full CodePeer mode (SCIL generation, disable switches that
279 -- interact badly with it, etc...).
281 Commands_To_Stdout : Boolean := False;
283 -- True if echoed commands to be written to stdout instead of stderr
285 Comment_Deleted_Lines : Boolean := False;
287 -- True if source lines removed by the preprocessor should be commented
288 -- in the output file.
290 Compile_Only : Boolean := False;
291 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
292 -- GNATMAKE, GPRMAKE, GPRMAKE:
293 -- set to True to skip bind and link steps (except when Bind_Only is
295 -- GNATCLEAN, GPRCLEAN:
296 -- set to True to delete only the files produced by the compiler but not
297 -- the library files or the executable files.
299 Config_File : Boolean := True;
301 -- Set to False to inhibit reading and processing of gnat.adc file
303 Config_File_Names : String_List_Access := null;
305 -- Names of configuration pragmas files (given by switches -gnatec)
307 Configurable_Run_Time_Mode : Boolean := False;
309 -- Set True if the compiler is operating in configurable run-time mode.
310 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
311 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
312 -- for details on the handling of the latter pragma.
314 Constant_Condition_Warnings : Boolean := False;
316 -- Set to True to activate warnings on constant conditions
318 Create_Mapping_File : Boolean := False;
320 -- Set to True (-C switch) to indicate that the compiler will be invoked
321 -- with a mapping file (-gnatem compiler switch).
323 Debug_Pragmas_Enabled : Boolean := False;
325 -- Enable debug statements from pragma Debug
327 subtype Debug_Level_Value is Nat range 0 .. 3;
328 Debugger_Level : Debug_Level_Value := 0;
330 -- The value given to the -g parameter. The default value for -g with
331 -- no value is 2. This is usually ignored by GNATBIND, except in the
332 -- VMS version where it is passed as an argument to __gnat_initialize
333 -- to trigger the activation of the remote debugging interface.
334 -- Is this still true ???
336 Debug_Generated_Code : Boolean := False;
338 -- Set True (-gnatD switch) to debug generated expanded code instead
339 -- of the original source code. Causes debugging information to be
340 -- written with respect to the generated code file that is written.
342 Default_Exit_Status : Int := 0;
344 -- Set the default exit status value. Set by the -Xnnn switch for the
347 Default_Stack_Size : Int := -1;
349 -- Set to default primary stack size in units of bytes. Set by
350 -- the -dnnn switch for the binder. A value of -1 indicates that no
351 -- default was set by the binder.
353 Default_Sec_Stack_Size : Int := -1;
355 -- Set to default secondary stack size in units of bytes. Set by
356 -- the -Dnnn switch for the binder. A value of -1 indicates that no
357 -- default was set by the binder, and that the default should be the
358 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
360 Detect_Blocking : Boolean := False;
362 -- Set True to force the run time to raise Program_Error if calls to
363 -- potentially blocking operations are detected from protected actions.
365 Display_Compilation_Progress : Boolean := False;
366 -- GNATMAKE, GPRMAKE, GPRBUILD
367 -- Set True (-d switch) to display information on progress while compiling
368 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
370 type Distribution_Stub_Mode_Type is
373 -- Normal mode, no generation/compilation of distribution stubs
375 Generate_Receiver_Stub_Body,
376 -- The unit being compiled is the RCI body, and the compiler will
377 -- generate the body for the receiver stubs and compile it.
379 Generate_Caller_Stub_Body);
380 -- The unit being compiled is the RCI spec, and the compiler will
381 -- generate the body for the caller stubs and compile it.
383 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
385 -- This enumeration variable indicates the five states of distribution
386 -- annex stub generation/compilation.
388 Do_Not_Execute : Boolean := False;
390 -- Set to True if no actual compilations should be undertaken.
392 Dump_Source_Text : Boolean := False;
394 -- Set to True (by -gnatL) to dump source text intermingled with generated
395 -- code. Effective only if either of Debug/Print_Generated_Code is true.
397 Dynamic_Elaboration_Checks : Boolean := False;
399 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
400 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
402 Dynamic_Stack_Measurement : Boolean := False;
404 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
406 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
408 -- Number of measurements we want to store during dynamic stack analysis.
409 -- When the buffer is full, non-storable results will be output on the fly.
410 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
411 -- by processing of -u flag for gnatbind.
413 Elab_Dependency_Output : Boolean := False;
415 -- Set to True to output complete list of elaboration constraints
417 Elab_Order_Output : Boolean := False;
419 -- Set to True to output chosen elaboration order
421 Elab_Warnings : Boolean := False;
423 -- Set to True to generate full elaboration warnings (-gnatwl)
425 Enable_Overflow_Checks : Boolean := False;
427 -- Set to True if -gnato (enable overflow checks) switch is set,
430 Error_Msg_Line_Length : Nat := 0;
432 -- Records the error message line length limit. If this is set to zero,
433 -- then we get the old style behavior, in which each call to the error
434 -- message routines generates one line of output as a separate message.
435 -- If it is set to a non-zero value, then continuation lines are folded
436 -- to make a single long message, and then this message is split up into
437 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
439 Exception_Handler_Encountered : Boolean := False;
441 -- This flag is set true if the parser encounters an exception handler.
442 -- It is used to set Warn_On_Exception_Propagation True if the restriction
443 -- No_Exception_Propagation is set.
445 Exception_Locations_Suppressed : Boolean := False;
447 -- This flag is set True if a Suppress_Exception_Locations configuration
448 -- pragma is currently active.
450 type Exception_Mechanism_Type is
451 -- Determines the handling of exceptions. See Exp_Ch11 for details
453 (Front_End_Setjmp_Longjmp_Exceptions,
454 -- Exceptions use setjmp/longjmp generated explicitly by the
455 -- front end (this includes gigi or other equivalent parts of
456 -- the code generator). AT END handlers are converted into
457 -- exception handlers by the front end in this mode.
459 Back_End_Exceptions);
460 -- Exceptions are handled by the back end. The front end simply
461 -- generates the handlers as they appear in the source, and AT
462 -- END handlers are left untouched (they are not converted into
463 -- exception handlers when operating in this mode.
464 pragma Convention (C, Exception_Mechanism_Type);
466 Exception_Mechanism : Exception_Mechanism_Type :=
467 Front_End_Setjmp_Longjmp_Exceptions;
469 -- Set to the appropriate value depending on the default as given in
470 -- system.ads (ZCX_By_Default, GCC_ZCX_Support). The C convention is there
471 -- to make this variable accessible to gigi.
473 Exception_Tracebacks : Boolean := False;
475 -- Set to True to store tracebacks in exception occurrences (-E)
477 Extensions_Allowed : Boolean := False;
479 -- Set to True by switch -gnatX if GNAT specific language extensions
480 -- are allowed. For example, the use of 'Constrained
with objects
of
481 -- generic types is a GNAT extension.
483 type External_Casing_Type
is (
484 As_Is
, -- External names cased as they appear in the Ada source
485 Uppercase
, -- External names forced to all uppercase letters
486 Lowercase
); -- External names forced to all lowercase letters
488 External_Name_Imp_Casing
: External_Casing_Type
:= Lowercase
;
490 -- The setting of this flag determines the casing of external names
491 -- when the name is implicitly derived from an entity name (i.e. either
492 -- no explicit External_Name or Link_Name argument is used, or, in the
493 -- case of extended DEC pragmas, the external name is given using an
494 -- identifier. The As_Is setting is not permitted here (since this would
495 -- create Ada source programs that were case sensitive).
497 External_Name_Exp_Casing
: External_Casing_Type
:= As_Is
;
499 -- The setting of this flag determines the casing of an external name
500 -- specified explicitly with a string literal. As_Is means the string
501 -- literal is used as given with no modification to the casing. If
502 -- Lowercase or Uppercase is set, then the string is forced to all
503 -- lowercase or all uppercase letters as appropriate. Note that this
504 -- setting has no effect if the external name is given using an identifier
505 -- in the case of extended DEC import/export pragmas (in this case the
506 -- casing is controlled by External_Name_Imp_Casing), and also has no
507 -- effect if an explicit Link_Name is supplied (a link name is always
508 -- used exactly as given).
510 External_Unit_Compilation_Allowed
: Boolean := False;
512 -- When True (set by gnatmake switch -x), allow compilation of sources
513 -- that are not part of any project file.
515 Fast_Math
: Boolean := False;
517 -- Indicates the current setting of Fast_Math mode, as set by the use
518 -- of a Fast_Math pragma (set on by Fast_Math (On)).
520 Float_Format
: Character := ' ';
522 -- A non-blank value indicates that a Float_Format pragma has been
523 -- processed, in which case this variable is set to 'I' for IEEE or
524 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
527 Float_Format_Long
: Character := ' ';
529 -- A non-blank value indicates that a Long_Float pragma has been
530 -- processed (this pragma is recognized only in OpenVMS versions
531 -- of GNAT), in which case this variable is set to D or G for
532 -- D_Float or G_Float.
534 Force_ALI_Tree_File
: Boolean := False;
536 -- Force generation of ALI file even if errors are encountered.
537 -- Also forces generation of tree file if -gnatt is also set.
539 Force_Checking_Of_Elaboration_Flags
: Boolean := False;
541 -- True if binding with forced checking of the elaboration flags
544 Force_Compilations
: Boolean := False;
545 -- GNATMAKE, GPRMAKE, GPRBUILD
546 -- Set to force recompilations even when the objects are up-to-date.
548 Full_Path_Name_For_Brief_Errors
: Boolean := False;
550 -- When True, in Brief_Output mode, each error message line
551 -- will start with the full path name of the source.
552 -- When False, only the file name without directory information
555 Full_List
: Boolean := False;
557 -- Set True to generate full source listing with embedded errors
559 Full_List_File_Name
: String_Ptr
:= null;
561 -- Set to file name to generate full source listing to named file (or if
562 -- the name is of the form .xxx, then to name.xxx where name is the source
563 -- file name with extension stripped.
565 Generate_Processed_File
: Boolean := False;
567 -- True when switch -gnateG is used. When True, create in a file
568 -- <source>.prep, if the source is preprocessed.
570 Generate_SCO
: Boolean := False;
572 -- True when switch -gnateS is used. When True, Source Coverage Obligation
573 -- (SCO) information is generated and output in the ALI file. See unit
574 -- Par_SCO for full details.
576 Generating_Code
: Boolean := False;
578 -- True if the frontend finished its work and has called the backend to
579 -- process the tree and generate the object file.
581 Global_Discard_Names
: Boolean := False;
583 -- True if a pragma Discard_Names appeared as a configuration pragma for
584 -- the current compilation unit.
586 GNAT_Mode
: Boolean := False;
588 -- True if compiling in GNAT system mode (-gnatg switch)
590 Heap_Size
: Nat
:= 0;
592 -- Heap size for memory allocations. Valid values are 32 and 64. Only
595 HLO_Active
: Boolean := False;
597 -- True if High Level Optimizer is activated (-gnatH switch)
599 Identifier_Character_Set
: Character;
601 -- This variable indicates the character set to be used for identifiers.
602 -- The possible settings are:
603 -- '1' Latin-5 (ISO-8859-1)
604 -- '2' Latin-5 (ISO-8859-2)
605 -- '3' Latin-5 (ISO-8859-3)
606 -- '4' Latin-5 (ISO-8859-4)
607 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
608 -- '9' Latin-5 (ISO-8859-9)
609 -- 'p' PC (US, IBM page 437)
610 -- '8' PC (European, IBM page 850)
611 -- 'f' Full upper set (all distinct)
612 -- 'n' No upper characters (Ada 83 rules)
613 -- 'w' Latin-1 plus wide characters allowed in identifiers
615 -- The setting affects the set of letters allowed in identifiers and the
616 -- upper/lower case equivalences. It does not affect the interpretation of
617 -- character and string literals, which are always stored using the actual
618 -- coding in the source program. This variable is initialized to the
619 -- default value appropriate to the system (in Osint.Initialize), and then
620 -- reset if a command line switch is used to change the setting.
622 Ignore_Rep_Clauses
: Boolean := False;
624 -- Set True to ignore all representation clauses. Useful when compiling
625 -- code from foreign compilers for checking or ASIS purposes. Can be
626 -- set True by use of -gnatI.
628 Implementation_Unit_Warnings
: Boolean := True;
630 -- Set True to active warnings for use of implementation internal units.
631 -- Can be controlled by use of -gnatwi/-gnatwI.
633 Implicit_Packing
: Boolean := False;
635 -- If set True, then a Size attribute clause on an array is allowed to
636 -- cause implicit packing instead of generating an error message. Set by
637 -- use of pragma Implicit_Packing.
639 Ineffective_Inline_Warnings
: Boolean := False;
641 -- Set True to activate warnings if front-end inlining (-gnatN) is not
642 -- able to actually inline a particular call (or all calls). Can be
643 -- controlled by use of -gnatwp/-gnatwP.
645 Init_Or_Norm_Scalars
: Boolean := False;
647 -- Set True if a pragma Initialize_Scalars applies to the current unit.
648 -- Also set True if a pragma Normalize_Scalars applies.
650 Initialize_Scalars
: Boolean := False;
652 -- Set True if a pragma Initialize_Scalars applies to the current unit.
653 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
655 Initialize_Scalars_Mode1
: Character := 'I';
656 Initialize_Scalars_Mode2
: Character := 'N';
658 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
659 -- is IN (invalid values), used if no -S switch is used.
661 Inline_Active
: Boolean := False;
663 -- Set True to activate pragma Inline processing across modules. Default
664 -- for now is not to inline across module boundaries.
666 Interface_Library_Unit
: Boolean := False;
668 -- Set to True to indicate that at least one ALI file is an interface ALI:
669 -- then elaboration flag checks are to be generated in the binder
672 Generate_SCIL
: Boolean := False;
674 -- Set True to activate SCIL code generation.
676 Invalid_Value_Used
: Boolean := False;
678 -- Set True if a valid Invalid_Value attribute is encountered
680 Follow_Links_For_Files
: Boolean := False;
682 -- Set to True (-eL) to process the project files in trusted mode. If
683 -- Follow_Links is False, it is assumed that the project doesn't contain
684 -- any file duplicated through symbolic links (although the latter are
685 -- still valid if they point to a file which is outside of the project),
686 -- and that no directory has a name which is a valid source name.
688 Follow_Links_For_Dirs
: Boolean := False;
690 -- Set to True if directories can be links in this project, and therefore
691 -- additional system calls must be performed to ensure that we always see
692 -- the same full name for each directory.
694 Front_End_Inlining
: Boolean := False;
696 -- Set True to activate inlining by front-end expansion
698 Inline_Processing_Required
: Boolean := False;
700 -- Set True if inline processing is required. Inline processing is required
701 -- if an active Inline pragma is processed. The flag is set for a pragma
702 -- Inline or Inline_Always that is actually active.
704 In_Place_Mode
: Boolean := False;
706 -- Set True to store ALI and object files in place i.e. in the object
707 -- directory if these files already exist or in the source directory
710 Keep_Going
: Boolean := False;
711 -- GNATMAKE, GPRMAKE, GPRBUILD
712 -- When True signals to ignore compilation errors and keep processing
713 -- sources until there is no more work.
715 Keep_Temporary_Files
: Boolean := False;
717 -- When True the temporary files created by the GNAT driver are not
718 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
720 Leap_Seconds_Support
: Boolean := False;
722 -- Set to True to enable leap seconds support in Ada.Calendar and its
725 Link_Only
: Boolean := False;
726 -- GNATMAKE, GPRMAKE, GPRBUILD
727 -- Set to True to skip compile and bind steps (except when Bind_Only is
730 List_Restrictions
: Boolean := False;
732 -- Set to True to list restrictions pragmas that could apply to partition
734 List_Units
: Boolean := False;
736 -- List units in the active library for a compilation (-gnatu switch)
738 List_Closure
: Boolean := False;
740 -- List all sources in the closure of a main (-R gnatbind switch)
742 List_Dependencies
: Boolean := False;
744 -- When True gnatmake verifies that the objects are up to date and
745 -- outputs the list of object dependencies (-M switch).
746 -- Output depends if -a switch is used or not.
747 -- This list can be used directly in a Makefile.
749 List_Representation_Info
: Int
range 0 .. 3 := 0;
751 -- Set non-zero by -gnatR switch to list representation information.
752 -- The settings are as follows:
754 -- 0 = no listing of representation information (default as above)
755 -- 1 = list rep info for user defined record and array types
756 -- 2 = list rep info for all user defined types and objects
757 -- 3 = like 2, but variable fields are decoded symbolically
759 List_Representation_Info_To_File
: Boolean := False;
761 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be
762 -- written to file.rep (where file is the name of the source file) instead
763 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
764 -- representation info is written to x.adb.ref.
766 List_Representation_Info_Mechanisms
: Boolean := False;
768 -- Set true by -gnatRm switch. Causes information on mechanisms to be
769 -- included in the representation output information.
771 List_Preprocessing_Symbols
: Boolean := False;
773 -- Set to True if symbols for preprocessing a source are to be listed
774 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
775 -- -s in preprocessing data file for the compiler.
777 type Create_Repinfo_File_Proc
is access procedure (Src
: String);
778 type Write_Repinfo_Line_Proc
is access procedure (Info
: String);
779 type Close_Repinfo_File_Proc
is access procedure;
780 -- Types used for procedure addresses below
782 Create_Repinfo_File_Access
: Create_Repinfo_File_Proc
:= null;
783 Write_Repinfo_Line_Access
: Write_Repinfo_Line_Proc
:= null;
784 Close_Repinfo_File_Access
: Close_Repinfo_File_Proc
:= null;
786 -- These three locations are left null when operating in non-compiler (e.g.
787 -- ASIS mode), but when operating in compiler mode, they are set to point
788 -- to the three corresponding procedures in Osint-C. The reason for this
789 -- slightly strange interface is to stop Repinfo from dragging in Osint in
790 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
792 type Create_List_File_Proc
is access procedure (S
: String);
793 type Write_List_Info_Proc
is access procedure (S
: String);
794 type Close_List_File_Proc
is access procedure;
795 -- Types used for procedure addresses below
797 Create_List_File_Access
: Create_List_File_Proc
:= null;
798 Write_List_Info_Access
: Write_List_Info_Proc
:= null;
799 Close_List_File_Access
: Close_List_File_Proc
:= null;
801 -- These three locations are left null when operating in non-compiler
802 -- (e.g. from the binder), but when operating in compiler mode, they are
803 -- set to point to the three corresponding procedures in Osint-C. The
804 -- reason for this slightly strange interface is to prevent Repinfo
805 -- from dragging in Osint-C in the binder, which would include unwanted
806 -- units in the binder.
808 Locking_Policy
: Character := ' ';
810 -- Set to ' ' for the default case (no locking policy specified). Reset to
811 -- first character (uppercase) of locking policy name if a valid pragma
812 -- Locking_Policy is encountered.
814 Locking_Policy_Sloc
: Source_Ptr
:= No_Location
;
816 -- Remember location of previous Locking_Policy pragma. This is used for
817 -- inconsistency error messages. A value of System_Location is used if the
818 -- policy is set in package System.
820 Look_In_Primary_Dir
: Boolean := True;
821 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
822 -- Set to False if a -I- was present on the command line. When True we are
823 -- allowed to look in the primary directory to locate other source or
826 Make_Steps
: Boolean := False;
828 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
831 Main_Index
: Int
:= 0;
833 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
834 -- the main program is the nnn unit in a multi-unit source file.
836 Mapping_File_Name
: String_Ptr
:= null;
838 -- File name of mapping between unit names, file names and path names.
839 -- (given by switch -gnatem)
841 Maximum_Messages
: Int
:= 9999;
843 -- Maximum default number of errors before compilation is terminated, or in
844 -- the case of GNAT, maximum number of warnings before further warnings are
845 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
847 Maximum_File_Name_Length
: Int
;
849 -- Maximum number of characters allowed in a file name, not counting the
850 -- extension, as set by the appropriate switch. If no switch is given,
851 -- then this value is initialized by Osint to the appropriate value.
853 Maximum_Processes
: Positive := 1;
854 -- GNATMAKE, GPRMAKE, GPRBUILD
855 -- Maximum number of processes that should be spawned to carry out
858 Minimal_Recompilation
: Boolean := False;
860 -- Set to True if minimal recompilation mode requested
862 Special_Exception_Package_Used
: Boolean := False;
864 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
865 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
866 -- local raise statements into gotos in the presence of either package.
868 Multiple_Unit_Index
: Int
;
870 -- This is set non-zero if the current unit is being compiled in multiple
871 -- unit per file mode, meaning that the current unit is selected from the
872 -- sequence of units in the current source file, using the value stored
873 -- in this variable (e.g. 2 = select second unit in file). A value of
874 -- zero indicates that we are in normal (one unit per file) mode.
876 No_Main_Subprogram
: Boolean := False;
877 -- GNATMAKE, GNATBIND
878 -- Set to True if compilation/binding of a program without main
879 -- subprogram requested.
881 No_Run_Time_Mode
: Boolean := False;
883 -- This flag is set True if a No_Run_Time pragma is encountered. See
884 -- spec of Rtsfind for a full description of handling of this pragma.
886 No_Split_Units
: Boolean := False;
888 -- Set to True with switch --no-split-units. When True, unit sources, spec,
889 -- body and subunits, must all be in the same project.This is checked after
892 No_Stdinc
: Boolean := False;
893 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
894 -- Set to True if no default source search dirs added to search list
896 No_Stdlib
: Boolean := False;
897 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
898 -- Set to True if no default library search dirs added to search list
900 No_Strict_Aliasing
: Boolean := False;
902 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
904 Normalize_Scalars
: Boolean := False;
906 -- Set True if a pragma Normalize_Scalars applies to the current unit.
907 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
909 Object_Directory_Present
: Boolean := False;
911 -- Set to True when an object directory is specified with option -D
913 type Operating_Mode_Type
is (Check_Syntax
, Check_Semantics
, Generate_Code
);
914 Operating_Mode
: Operating_Mode_Type
:= Generate_Code
;
916 -- Indicates the operating mode of the compiler. The default is generate
917 -- code, which runs the parser, semantics and backend. Switches can be
918 -- used to set syntax checking only mode, or syntax and semantics checking
919 -- only mode. Operating_Mode can also be modified as a result of detecting
920 -- errors during the compilation process. In particular if any serious
921 -- error is detected then this flag is reset from Generate_Code to
922 -- Check_Semantics after generating an error message.
924 Optimize_Alignment
: Character := 'O';
925 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
926 -- be modified by use of pragma Optimize_Alignment.
928 Optimize_Alignment_Local
: Boolean := False;
929 -- Set True if Optimize_Alignment mode is set by a local configuration
930 -- pragma that overrides the gnat.adc (or other configuration file) default
931 -- so that the unit is not dependent on the default setting. Also always
932 -- set True for internal units, since these always have a default setting
933 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
934 -- them all having such an explicit pragma in each unit).
936 Original_Operating_Mode
: Operating_Mode_Type
:= Generate_Code
;
938 -- Indicates the original operating mode of the compiler as set by compiler
939 -- options. This is identical to Operating_Mode except that this is not
940 -- affected by errors.
942 Optimization_Level
: Int
;
943 pragma Import
(C
, Optimization_Level
, "optimize");
944 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
945 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
949 pragma Import
(C
, Optimize_Size
, "optimize_size");
950 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
951 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
952 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
954 Output_File_Name_Present
: Boolean := False;
955 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
956 -- Set to True when the output C file name is given with option -o for
957 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
958 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
960 Output_Linker_Option_List
: Boolean := False;
962 -- True if output of list of linker options is requested (-K switch set)
964 Output_ALI_List
: Boolean := False;
965 ALI_List_Filename
: String_Ptr
;
967 -- True if output of list of ALIs is requested (-A switch set). List is
968 -- output under the given filename, or standard output if not specified.
970 Output_Object_List
: Boolean := False;
971 Object_List_Filename
: String_Ptr
;
973 -- True if output of list of objects is requested (-O switch set). List is
974 -- output under the given filename, or standard output if not specified.
976 Overflow_Checks_Unsuppressed
: Boolean := False;
978 -- Set to True if at least one occurrence of pragma Unsuppress
979 -- (All_Checks|Overflow_Checks) has been processed.
981 Persistent_BSS_Mode
: Boolean := False;
983 -- True if a Persistent_BSS configuration pragma is in effect, causing
984 -- potentially persistent data to be placed in the persistent_bss section.
986 Pessimistic_Elab_Order
: Boolean := False;
988 -- True if pessimistic elaboration order is to be chosen (-p switch set)
990 Polling_Required
: Boolean := False;
992 -- Set to True if polling for asynchronous abort is enabled by using
993 -- the -gnatP option for GNAT.
995 Preprocessing_Data_File
: String_Ptr
:= null;
997 -- Set by switch -gnatep=. The file name of the preprocessing data file.
999 Print_Generated_Code
: Boolean := False;
1001 -- Set to True to enable output of generated code in source form. This
1002 -- flag is set by the -gnatG switch.
1004 Print_Standard
: Boolean := False;
1006 -- Set to true to enable printing of package standard in source form.
1007 -- This flag is set by the -gnatS switch
1009 Propagate_Exceptions
: Boolean := False;
1011 -- Indicates if subprogram descriptor exception tables should be
1012 -- built for imported subprograms. Set True if a Propagate_Exceptions
1013 -- pragma applies to the extended main unit.
1015 type Usage
is (Unknown
, Not_In_Use
, In_Use
);
1016 Project_File_In_Use
: Usage
:= Unknown
;
1018 -- Indicates if a project file is used or not. Set to In_Use by the first
1021 Queuing_Policy
: Character := ' ';
1023 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1024 -- first character (uppercase) of locking policy name if a valid
1025 -- Queuing_Policy pragma is encountered.
1027 Queuing_Policy_Sloc
: Source_Ptr
:= No_Location
;
1029 -- Remember location of previous Queuing_Policy pragma. This is used for
1030 -- inconsistency error messages. A value of System_Location is used if the
1031 -- policy is set in package System.
1033 Quiet_Output
: Boolean := False;
1034 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1035 -- Set to True if the tool should not have any output if there are no
1036 -- errors or warnings.
1038 Replace_In_Comments
: Boolean := False;
1040 -- Set to True if -C switch used
1042 RTS_Lib_Path_Name
: String_Ptr
:= null;
1043 RTS_Src_Path_Name
: String_Ptr
:= null;
1045 -- Set to the "adalib" and "adainclude" directories of the run time
1046 -- specified by --RTS=.
1048 RTS_Switch
: Boolean := False;
1049 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1050 -- Set to True when the --RTS switch is set
1052 Run_Path_Option
: Boolean := True;
1053 -- GNATMAKE, GNATLINK
1054 -- Set to False when no run_path_option should be issued to the linker
1056 Search_Directory_Present
: Boolean := False;
1058 -- Set to True when argument is -I. Reset to False when next argument, a
1059 -- search directory path is taken into account. Note that this is quite
1060 -- different from other switches in this section in that it is only set in
1061 -- a transitory manner as a result of scanning a -I switch with no file
1062 -- name, and if set, is an indication that the next argument is to be
1063 -- treated as a file name.
1065 Sec_Stack_Used
: Boolean := False;
1067 -- Set True if generated code uses the System.Secondary_Stack package. For
1068 -- the binder, set if any unit uses the secondary stack package.
1070 Setup_Projects
: Boolean := False;
1072 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1073 -- object, library and exec directories.
1075 Shared_Libgnat
: Boolean;
1077 -- Set to True if a shared libgnat is requested by using the -shared option
1078 -- for GNATBIND and to False when using the -static option. The value of
1079 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1081 Short_Circuit_And_Or
: Boolean := False;
1083 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1085 Sprint_Line_Limit
: Nat
:= 72;
1086 -- Limit values for chopping long lines in Sprint output, can be reset
1087 -- by use of NNN parameter with -gnatG or -gnatD switches.
1089 Stack_Checking_Enabled
: Boolean;
1091 -- Set to indicate if -fstack-check switch is set for the compilation. True
1092 -- means that the switch is set, so that stack checking is enabled. False
1093 -- means that the switch is not set (no stack checking). This value is
1094 -- obtained from the external imported value flag_stack_check in the gcc
1095 -- backend (see Frontend) and may be referenced throughout the compilation
1098 Style_Check
: Boolean := False;
1100 -- Set True to perform style checks. Activates checks carried out in
1101 -- package Style (see body of this package for details of checks) This
1102 -- flag is set True by either the -gnatg or -gnaty switches.
1104 Suppress_All_Inlining
: Boolean := False;
1106 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1107 -- regardless of any other switches that are set.
1109 Suppress_Control_Flow_Optimizations
: Boolean := False;
1111 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1112 -- that interfere with coverage analysis based on the object code.
1114 System_Extend_Pragma_Arg
: Node_Id
:= Empty
;
1116 -- Set non-empty if and only if a correct Extend_System pragma was present
1117 -- in which case it points to the argument of the pragma, and the name can
1118 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1120 System_Extend_Unit
: Node_Id
:= Empty
;
1122 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1123 -- is never appropriate in GNAT_Mode (and causes troubles, including
1124 -- bogus circularities, if we try to compile the run-time library with
1125 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1126 -- is a copy of the value set in System_Extend_Pragma_Arg.
1128 Subunits_Missing
: Boolean := False;
1130 -- This flag is set true if missing subunits are detected with code
1131 -- generation active. This causes code generation to be skipped.
1133 Suppress_Checks
: Boolean := False;
1135 -- Set to True if -gnatp (suppress all checks) switch present.
1137 Suppress_Options
: Suppress_Array
;
1139 -- Flags set True to suppress corresponding check, i.e. add an implicit
1140 -- pragma Suppress at the outer level of each unit compiled. Note that
1141 -- these suppress actions can be overridden by the use of the Unsuppress
1142 -- pragma. This variable is initialized by Osint.Initialize.
1144 Suppress_Back_Annotation
: Boolean := False;
1146 -- This flag is set True if back annotation of representation information
1147 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1148 -- This avoids unnecessary time being spent on back annotation.
1150 Table_Factor
: Int
:= 1;
1152 -- Factor by which all initial table sizes set in Alloc are multiplied.
1153 -- Used in Table to calculate initial table sizes (the initial table size
1154 -- is the value in Alloc, used as the Table_Initial parameter value,
1155 -- multiplied by the factor given here. The default value is used if no
1156 -- -gnatT switch appears.
1158 Tagged_Type_Expansion
: Boolean := True;
1160 -- Set True if tagged types and interfaces should be expanded by the
1161 -- front-end. If False, the original tree is left unexpanded for tagged
1162 -- types and dispatching calls, assuming the underlying target supports
1163 -- it (e.g. in the JVM case).
1165 Task_Dispatching_Policy
: Character := ' ';
1167 -- Set to ' ' for the default case (no task dispatching policy specified).
1168 -- Reset to first character (uppercase) of task dispatching policy name
1169 -- if a valid Task_Dispatching_Policy pragma is encountered.
1171 Task_Dispatching_Policy_Sloc
: Source_Ptr
:= No_Location
;
1173 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1174 -- used for inconsistency error messages. A value of System_Location is
1175 -- used if the policy is set in package System.
1177 Tasking_Used
: Boolean := False;
1178 -- Set True if any tasking construct is encountered. Used to activate the
1179 -- output of the Q, L and T lines in ALI files.
1181 Time_Slice_Set
: Boolean := False;
1183 -- Set True if a pragma Time_Slice is processed in the main unit, or
1184 -- if the -gnatTnn switch is present to set a time slice value.
1186 Time_Slice_Value
: Nat
;
1188 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1189 -- Time_Slice pragma has been processed. Set to the time slice value in
1190 -- microseconds. Negative values are stored as zero, and the value is not
1191 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1192 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1194 Tolerate_Consistency_Errors
: Boolean := False;
1196 -- Tolerate time stamp and other consistency errors. If this flag is set to
1197 -- True (-t), then inconsistencies result in warnings rather than errors.
1199 Treat_Restrictions_As_Warnings
: Boolean := False;
1201 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1204 Tree_Output
: Boolean := False;
1206 -- Set to True (-gnatt) to generate output tree file
1208 True_VMS_Target
: Boolean := False;
1209 -- Set True if we are on a VMS target. The setting of this flag reflects
1210 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1211 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1212 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1214 Try_Semantics
: Boolean := False;
1216 -- Flag set to force attempt at semantic analysis, even if parser errors
1217 -- occur. This will probably cause blowups at this stage in the game. On
1218 -- the other hand, most such blowups will be caught cleanly and simply
1219 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1221 Unchecked_Shared_Lib_Imports
: Boolean := False;
1223 -- Set to True when shared library projects are allowed to import projects
1224 -- that are not shared library projects. Set by switch
1225 -- --unchecked-shared-lib-imports.
1227 Undefined_Symbols_Are_False
: Boolean := False;
1229 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1230 -- file for the compiler. Indicates that while preprocessing sources,
1231 -- symbols that are not defined have the value FALSE.
1233 Unique_Error_Tag
: Boolean := Tag_Errors
;
1235 -- Indicates if error messages are to be prefixed by the string error:
1236 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1238 Universal_Addressing_On_AAMP
: Boolean := False;
1240 -- Indicates if library-level objects should be accessed and updated using
1241 -- universal addressing instructions on the AAMP architecture. This flag is
1242 -- set to True when pragma Universal_Data is given as a configuration
1245 Unreserve_All_Interrupts
: Boolean := False;
1247 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1248 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1249 -- corresponding attribute set in GNATBIND.
1251 Upper_Half_Encoding
: Boolean := False;
1253 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1254 -- used in the normal way to represent themselves. If the wide character
1255 -- encoding method uses the upper bit for this encoding, then this flag is
1256 -- set True, and upper half characters in the source indicate the start of
1257 -- a wide character sequence. Set by -gnatW or -W switches.
1259 Use_Include_Path_File
: Boolean := False;
1260 -- GNATMAKE, GPRBUILD
1261 -- When True, create a source search path file, even when a mapping file
1264 Usage_Requested
: Boolean := False;
1265 -- GNAT, GNATBIND, GNATMAKE
1266 -- Set to True if -h (-gnath for the compiler) switch encountered
1267 -- requesting usage information
1269 Use_Expression_With_Actions
: Boolean;
1270 -- The N_Expression_With_Actions node has been introduced relatively
1271 -- recently, and not all back ends are prepared to handle it yet. So
1272 -- we use this flag to suppress its use during a transitional period.
1273 -- Currently the default is False for all cases (set in gnat1drv).
1274 -- The default can be modified using -gnatd.X/-gnatd.Y.
1276 Use_Pragma_Linker_Constructor
: Boolean := False;
1278 -- True if pragma Linker_Constructor applies to adainit
1280 Use_VADS_Size
: Boolean := False;
1282 -- Set to True if a valid pragma Use_VADS_Size is processed
1284 Validity_Checks_On
: Boolean := True;
1286 -- This flag determines if validity checking is on or off. The initial
1287 -- state is on, and the required default validity checks are active. The
1288 -- actual set of checks that is performed if Validity_Checks_On is set is
1289 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1290 -- is controlled by pragma Validity_Checks (On | Off), and also some
1291 -- generated compiler code (typically code that has to do with validity
1292 -- check generation) is compiled with this flag set to False. This flag is
1293 -- set to False by the -gnatp switch.
1295 Verbose_Mode
: Boolean := False;
1296 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1297 -- GPRMAKE, GPRBUILD, GPRCLEAN
1298 -- Set to True to get verbose mode (full error message text and location
1299 -- information sent to standard output, also header, copyright and summary)
1301 type Verbosity_Level_Type
is (None
, Low
, Medium
, High
);
1302 Verbosity_Level
: Verbosity_Level_Type
:= High
;
1303 -- GNATMAKE, GPRMAKE
1304 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1305 -- the level of verbosity of informational messages:
1307 -- In Low Verbosity, the reasons why a source is recompiled, the name
1308 -- of the executable and the reason it must be rebuilt is output.
1310 -- In Medium Verbosity, additional lines are output for each ALI file
1313 -- In High Verbosity, additional lines are output when the ALI file
1314 -- is part of an Ada library, is read-only or is part of the runtime.
1316 Warn_On_Ada_2005_Compatibility
: Boolean := True;
1318 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1319 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1320 -- mode. Set False by -gnatwY.
1322 Warn_On_Parameter_Order
: Boolean := False;
1324 -- Set to True to generate warnings for cases where the argument list for
1325 -- a call is a sequence of identifiers that match the formal identifiers,
1326 -- but are in the wrong order.
1328 Warn_On_Assertion_Failure
: Boolean := True;
1330 -- Set to True to activate warnings on assertions that can be determined
1331 -- at compile time will always fail. Set false by -gnatw.A.
1333 Warn_On_Assumed_Low_Bound
: Boolean := True;
1335 -- Set to True to activate warnings for string parameters that are indexed
1336 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1337 -- False by -gnatwW.
1339 Warn_On_Bad_Fixed_Value
: Boolean := False;
1341 -- Set to True to generate warnings for static fixed-point expression
1342 -- values that are not an exact multiple of the small value of the type.
1344 Warn_On_Biased_Representation
: Boolean := True;
1346 -- Set to True to generate warnings for size clauses, component clauses
1347 -- and component_size clauses that force biased representation. Set False
1350 Warn_On_Constant
: Boolean := False;
1352 -- Set to True to generate warnings for variables that could be declared
1353 -- as constants. Modified by use of -gnatwk/K.
1355 Warn_On_Deleted_Code
: Boolean := False;
1357 -- Set to True to generate warnings for code deleted by the front end
1358 -- for conditional statements whose outcome is known at compile time.
1359 -- Modified by use of -gnatwt/T.
1361 Warn_On_Dereference
: Boolean := False;
1363 -- Set to True to generate warnings for implicit dereferences for array
1364 -- indexing and record component access. Modified by use of -gnatwd/D.
1366 Warn_On_Export_Import
: Boolean := True;
1368 -- Set to True to generate warnings for suspicious use of export or
1369 -- import pragmas. Modified by use of -gnatwx/X.
1371 Warn_On_Hiding
: Boolean := False;
1373 -- Set to True to generate warnings if a declared entity hides another
1374 -- entity. The default is that this warning is suppressed.
1376 Warn_On_Modified_Unread
: Boolean := False;
1378 -- Set to True to generate warnings if a variable is assigned but is never
1379 -- read. Also controls warnings for similar cases involving out parameters,
1380 -- but only if there is only one out parameter for the procedure involved.
1381 -- The default is that this warning is suppressed.
1383 Warn_On_All_Unread_Out_Parameters
: Boolean := False;
1385 -- Set to True to generate warnings in all cases where a variable is
1386 -- modified by being passed as to an OUT formal, but the resulting value is
1387 -- never read. The default is that this warning is suppressed, except in
1390 Warn_On_No_Value_Assigned
: Boolean := True;
1392 -- Set to True to generate warnings if no value is ever assigned to a
1393 -- variable that is at least partially uninitialized. Set to false to
1394 -- suppress such warnings. The default is that such warnings are enabled.
1396 Warn_On_Non_Local_Exception
: Boolean := False;
1398 -- Set to True to generate warnings for non-local exception raises and also
1399 -- handlers that can never handle a local raise. This warning is only ever
1400 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1401 -- default is not to generate the warnings except that if the source has
1402 -- at least one exception handler, and this restriction is set, and the
1403 -- warning was not explicitly turned off, then it is turned on by default.
1405 No_Warn_On_Non_Local_Exception
: Boolean := False;
1407 -- This is set to True if the above warning is explicitly suppressed. We
1408 -- use this to avoid turning it on by default when No_Exception_Propagation
1409 -- restriction is set and an exception handler is present.
1411 Warn_On_Obsolescent_Feature
: Boolean := False;
1413 -- Set to True to generate warnings on use of any feature in Annex or if a
1414 -- subprogram is called for which a pragma Obsolescent applies.
1416 Warn_On_Overlap
: Boolean := False;
1418 -- Set to True to generate warnings when a writable actual which is not
1419 -- a by-copy type overlaps with another actual in a subprogram call.
1421 Warn_On_Questionable_Missing_Parens
: Boolean := True;
1423 -- Set to True to generate warnings for cases where parentheses are missing
1424 -- and the usage is questionable, because the intent is unclear.
1426 Warn_On_Redundant_Constructs
: Boolean := False;
1428 -- Set to True to generate warnings for redundant constructs (e.g. useless
1429 -- assignments/conversions). The default is that this warning is disabled.
1431 Warn_On_Object_Renames_Function
: Boolean := False;
1433 -- Set to True to generate warnings when a function result is renamed as
1434 -- an object. The default is that this warning is disabled.
1436 Warn_On_Reverse_Bit_Order
: Boolean := True;
1438 -- Set to True to generate warning (informational) messages for component
1439 -- clauses that are affected by non-standard bit-order. The default is
1440 -- that this warning is enabled.
1442 Warn_On_Suspicious_Modulus_Value
: Boolean := True;
1444 -- Set to True to generate warnings for suspicious modulus values. The
1445 -- default is that this warning is enabled.
1447 Warn_On_Unchecked_Conversion
: Boolean := True;
1449 -- Set to True to generate warnings for unchecked conversions that may have
1450 -- non-portable semantics (e.g. because sizes of types differ). The default
1451 -- is that this warning is enabled.
1453 Warn_On_Unrecognized_Pragma
: Boolean := True;
1455 -- Set to True to generate warnings for unrecognized pragmas. The default
1456 -- is that this warning is enabled.
1458 Warn_On_Unrepped_Components
: Boolean := False;
1460 -- Set to True to generate warnings for the case of components of record
1461 -- which have a record representation clause but this component does not
1462 -- have a component clause. The default is that this warning is disabled.
1464 Warn_On_Warnings_Off
: Boolean := False;
1466 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1467 -- where either the pragma is never used, or it could be replaced by a
1468 -- pragma Unmodified or Unreferenced.
1470 type Warning_Mode_Type
is (Suppress
, Normal
, Treat_As_Error
);
1471 Warning_Mode
: Warning_Mode_Type
:= Normal
;
1473 -- Controls treatment of warning messages. If set to Suppress, warning
1474 -- messages are not generated at all. In Normal mode, they are generated
1475 -- but do not count as errors. In Treat_As_Error mode, warning messages
1476 -- are generated and are treated as errors.
1478 Wide_Character_Encoding_Method
: WC_Encoding_Method
:= WCEM_Brackets
;
1480 -- Method used for encoding wide characters in the source program. See
1481 -- description of type in unit System.WCh_Con for a list of the methods
1482 -- that are currently supported. Note that brackets notation is always
1483 -- recognized in source programs regardless of the setting of this
1484 -- variable. The default setting causes only the brackets notation to be
1485 -- recognized. If this is the main unit, this setting also controls the
1486 -- output of the W=? parameter in the ALI file, which is used to provide
1487 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1488 -- the value set here overrides this main unit default.
1490 Wide_Character_Encoding_Method_Specified
: Boolean := False;
1492 -- Set True if the value in Wide_Character_Encoding_Method was set as
1493 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1495 Xref_Active
: Boolean := True;
1497 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1499 Zero_Formatting
: Boolean := False;
1501 -- Do no formatting (no title, no leading spaces, no empty lines) in
1502 -- auxiliary outputs (-e, -K, -l, -R).
1504 ----------------------------
1505 -- Configuration Settings --
1506 ----------------------------
1508 -- These are settings that are used to establish the mode at the start of
1509 -- each unit. The values defined below can be affected either by command
1510 -- line switches, or by the use of appropriate configuration pragmas in a
1511 -- configuration pragma file.
1513 Ada_Version_Config
: Ada_Version_Type
;
1515 -- This is the value of the configuration switch for the Ada 83 mode, as
1516 -- set by the command line switches -gnat83/95/05, and possibly modified by
1517 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1518 -- to set the initial value for Ada_Version mode at the start of analysis
1519 -- of a unit. Note however, that the setting of this flag is ignored for
1520 -- internal and predefined units (which are always compiled in the most up
1521 -- to date version of Ada).
1523 Ada_Version_Explicit_Config
: Ada_Version_Type
;
1525 -- This is set in the same manner as Ada_Version_Config. The difference is
1526 -- that the setting of this flag is not ignored for internal and predefined
1527 -- units, which for some purposes do indeed access this value, regardless
1528 -- of the fact that they are compiled the most up to date ada version).
1530 Assertions_Enabled_Config
: Boolean;
1532 -- This is the value of the configuration switch for assertions enabled
1533 -- mode, as possibly set by the command line switch -gnata, and possibly
1534 -- modified by the use of the configuration pragma Assertion_Policy.
1536 Assume_No_Invalid_Values_Config
: Boolean;
1538 -- This is the value of the configuration switch for assuming "no invalid
1539 -- values enabled" mode, as possibly set by the command line switch
1540 -- -gnatB, and possibly modified by the use of the configuration pragma
1541 -- Assume_No_Invalid_Values.
1543 Check_Policy_List_Config
: Node_Id
;
1545 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1546 -- that are linked through the Next_Pragma fields, with the list being
1547 -- terminated by Empty. The order is most recently processed first. This
1548 -- list includes only those pragmas in configuration pragma files.
1550 Debug_Pragmas_Enabled_Config
: Boolean;
1552 -- This is the value of the configuration switch for debug pragmas enabled
1553 -- mode, as possibly set by the command line switch -gnata and possibly
1554 -- modified by the use of the configuration pragma Debug_Policy.
1556 Dynamic_Elaboration_Checks_Config
: Boolean := False;
1558 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1559 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1561 Exception_Locations_Suppressed_Config
: Boolean := False;
1563 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1565 Extensions_Allowed_Config
: Boolean;
1567 -- This is the flag that indicates whether extensions are allowed. It can
1568 -- be set True either by use of the -gnatX switch, or by use of the
1569 -- configuration pragma Extensions_Allowed (On). It is always set to True
1570 -- for internal GNAT units, since extensions are always permitted in such
1573 External_Name_Exp_Casing_Config
: External_Casing_Type
;
1575 -- This is the value of the configuration switch that controls casing of
1576 -- external symbols for which an explicit external name is given. It can be
1577 -- set to Uppercase by the command line switch -gnatF, and further modified
1578 -- by the use of the configuration pragma External_Name_Casing in the
1579 -- gnat.adc file. This flag is used to set the initial value for
1580 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1581 -- however that the setting of this flag is ignored for internal and
1582 -- predefined units (which are always compiled with As_Is mode).
1584 External_Name_Imp_Casing_Config
: External_Casing_Type
;
1586 -- This is the value of the configuration switch that controls casing of
1587 -- external symbols where the external name is implicitly given. It can be
1588 -- set to Uppercase by the command line switch -gnatF, and further modified
1589 -- by the use of the configuration pragma External_Name_Casing in the
1590 -- gnat.adc file. This flag is used to set the initial value for
1591 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1592 -- however that the setting of this flag is ignored for internal and
1593 -- predefined units (which are always compiled with Lowercase mode).
1595 Fast_Math_Config
: Boolean;
1597 -- This is the value of the configuration switch that controls Fast_Math
1598 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1599 -- used to set the initial value of Fast_Math at the start of each new
1600 -- compilation unit.
1602 Init_Or_Norm_Scalars_Config
: Boolean;
1604 -- This is the value of the configuration switch that is set by one
1605 -- of the pragmas Initialize_Scalars or Normalize_Scalars.
1607 Initialize_Scalars_Config
: Boolean;
1609 -- This is the value of the configuration switch that is set by the
1610 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1611 -- This switch is not set when the pragma appears ahead of a given
1612 -- unit, so it does not affect the compilation of other units.
1614 Optimize_Alignment_Config
: Character;
1616 -- This is the value of the configuration switch that controls the
1617 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1618 -- It is used to set the initial value of Optimize_Alignment at the start
1619 -- of each new compilation unit, except that it is always set to 'O' (off)
1620 -- for internal units.
1622 Persistent_BSS_Mode_Config
: Boolean;
1624 -- This is the value of the configuration switch that controls whether
1625 -- potentially persistent data is to be placed in the persistent_bss
1626 -- section. It can be set True by use of the pragma Persistent_BSS.
1627 -- This flag is used to set the initial value of Persistent_BSS_Mode
1628 -- at the start of each compilation unit, except that it is always
1629 -- set False for predefined units.
1631 Polling_Required_Config
: Boolean;
1633 -- This is the value of the configuration switch that controls polling
1634 -- mode. It can be set True by the command line switch -gnatP, and then
1635 -- further modified by the use of pragma Polling in the gnat.adc file. This
1636 -- flag is used to set the initial value for Polling_Required at the start
1637 -- of analyzing each unit.
1639 Use_VADS_Size_Config
: Boolean;
1641 -- This is the value of the configuration switch that controls the use of
1642 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1643 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1644 -- This flag is used to set the initial value for Use_VADS_Size at the
1645 -- start of analyzing each unit. Note however that the setting of this flag
1646 -- is ignored for internal and predefined units (which are always compiled
1647 -- with the standard Size semantics).
1649 type Config_Switches_Type
is private;
1650 -- Type used to save values of the switches set from Config values
1652 procedure Save_Opt_Config_Switches
(Save
: out Config_Switches_Type
);
1653 -- This procedure saves the current values of the switches which are
1654 -- initialized from the above Config values, and then resets these switches
1655 -- according to the Config value settings.
1657 procedure Set_Opt_Config_Switches
1658 (Internal_Unit
: Boolean;
1659 Main_Unit
: Boolean);
1660 -- This procedure sets the switches to the appropriate initial values. The
1661 -- parameter Internal_Unit is True for an internal or predefined unit, and
1662 -- affects the way the switches are set (see above). Main_Unit is true if
1663 -- switches are being set for the main unit (this affects setting of the
1664 -- assert/debug pragma switches, which are normally set false by default
1665 -- for an internal unit, except when the internal unit is the main unit,
1666 -- in which case we use the command line settings).
1668 procedure Restore_Opt_Config_Switches
(Save
: Config_Switches_Type
);
1669 -- This procedure restores a set of switch values previously saved by a
1670 -- call to Save_Opt_Switches.
1672 procedure Register_Opt_Config_Switches
;
1673 -- This procedure is called after processing the gnat.adc file and other
1674 -- configuration pragma files to record the values of the Config switches,
1675 -- as possibly modified by the use of command line switches and pragmas
1676 -- appearing in these files.
1678 ------------------------
1679 -- Other Global Flags --
1680 ------------------------
1682 Expander_Active
: Boolean := False;
1683 -- A flag that indicates if expansion is active (True) or deactivated
1684 -- (False). When expansion is deactivated all calls to expander routines
1685 -- have no effect. Note that the initial setting of False is merely to
1686 -- prevent saving of an undefined value for an initial call to the
1687 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1688 -- this flag, see package Expander. Indeed this flag might more logically
1689 -- be in the spec of Expander, but it is referenced by Errout, and it
1690 -- really seems wrong for Errout to depend on Expander.
1692 Static_Dispatch_Tables
: Boolean := True;
1693 -- This flag indicates if the backend supports generation of statically
1694 -- allocated dispatch tables. If it is True, then the front end will
1695 -- generate static aggregates for dispatch tables that contain forward
1696 -- references to addresses of subprograms not seen yet, and the back end
1697 -- must be prepared to handle this case. If it is False, then the front
1698 -- end generates assignments to initialize the dispatch table, and there
1699 -- are no such forward references. By default we build statically allocated
1700 -- dispatch tables for all library level tagged types in all platforms.This
1701 -- behavior can be disabled using switch -gnatd.t which will set this flag
1702 -- to False and revert to the previous dynamic behavior.
1704 -----------------------
1705 -- Tree I/O Routines --
1706 -----------------------
1708 procedure Tree_Read
;
1709 -- Reads switch settings from current tree file using Tree_Read
1711 procedure Tree_Write
;
1712 -- Writes out switch settings to current tree file using Tree_Write
1714 --------------------------
1715 -- ASIS Version Control --
1716 --------------------------
1718 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1719 -- are supposed to be used in the GNAT/ASIS version check performed in
1720 -- the ASIS code (this package is also a part of the ASIS implementation).
1721 -- They are set by Tree_Read procedure, so they represent the version
1722 -- number (and the version string) of the compiler which has created the
1723 -- tree, and they are supposed to be compared with the corresponding values
1724 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1727 Tree_Version_String
: String_Access
;
1728 -- Used to store the compiler version string read from a tree file to check
1729 -- if it is from the same date as stored in the version string in Gnatvsn.
1730 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1731 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1732 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1733 -- of the corresponding source sets, using version strings that may be
1734 -- of different lengths.
1736 Tree_ASIS_Version_Number
: Int
;
1737 -- Used to store the ASIS version number read from a tree file to check if
1738 -- it is the same as stored in the ASIS version number in Tree_IO.
1742 -- The following type is used to save and restore settings of switches in
1743 -- Opt that represent the configuration (i.e. result of config pragmas).
1745 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1746 -- flag that once set does not get reset, since the whole idea of this flag
1747 -- is to record the setting for the main unit.
1749 type Config_Switches_Type
is record
1750 Ada_Version
: Ada_Version_Type
;
1751 Ada_Version_Explicit
: Ada_Version_Type
;
1752 Assertions_Enabled
: Boolean;
1753 Assume_No_Invalid_Values
: Boolean;
1754 Check_Policy_List
: Node_Id
;
1755 Debug_Pragmas_Enabled
: Boolean;
1756 Dynamic_Elaboration_Checks
: Boolean;
1757 Exception_Locations_Suppressed
: Boolean;
1758 Extensions_Allowed
: Boolean;
1759 External_Name_Exp_Casing
: External_Casing_Type
;
1760 External_Name_Imp_Casing
: External_Casing_Type
;
1761 Fast_Math
: Boolean;
1762 Init_Or_Norm_Scalars
: Boolean;
1763 Initialize_Scalars
: Boolean;
1764 Optimize_Alignment
: Character;
1765 Optimize_Alignment_Local
: Boolean;
1766 Persistent_BSS_Mode
: Boolean;
1767 Polling_Required
: Boolean;
1768 Use_VADS_Size
: Boolean;
1771 -- The following declarations are for GCC version dependent flags. We do
1772 -- not let client code in the compiler test GCC_Version directly, but
1773 -- instead use deferred constants for relevant feature tags.
1775 -- Note: there currently are no such constants defined in this section,
1776 -- since the compiler front end is currently entirely independent of the
1777 -- GCC version, which is a desirable state of affairs.
1779 function get_gcc_version
return Int
;
1780 pragma Import
(C
, get_gcc_version
, "get_gcc_version");
1782 GCC_Version
: constant Nat
:= get_gcc_version
;
1784 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1785 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.