1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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.
42 with Hostparm; use Hostparm;
43 with Types; use Types;
45 with System.Strings; use System.Strings;
46 with System.WCh_Con; use System.WCh_Con;
50 ----------------------------------------------
51 -- Settings of Modes for Current Processing --
52 ----------------------------------------------
54 -- The following mode values represent the current state of processing.
55 -- The values set here are the default values. Unless otherwise noted,
56 -- the value may be reset in Switch-? with an appropriate switch. In
57 -- some cases, the values can also be modified by pragmas, and in the
58 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
59 -- the default values.
61 Ada_Bind_File : Boolean := True;
63 -- Set True if binder file to be generated in Ada rather than C
65 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
66 pragma Warnings (Off, Ada_Version_Type);
67 -- Versions of Ada for Ada_Version below. Note that these are ordered,
68 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
69 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
70 -- which we want to allow, so that things work OK when Ada_15 is added!
71 -- This warning is now removed, so this pragma can be removed some time???
73 Ada_Version_Default : Ada_Version_Type := Ada_05;
75 -- Default Ada version if no switch given
77 Ada_Version : Ada_Version_Type := Ada_Version_Default;
79 -- Current Ada version for compiler, as set by configuration pragmas,
80 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
81 -- predefined or internal file is compiled.
83 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
85 -- Like Ada_Version, but does not get set implicitly for predefined
86 -- or internal units, so it reflects the Ada version explicitly set
87 -- using configuration pragmas or compiler switches (or if neither
88 -- appears, it remains set to Ada_Version_Default). This is used in
89 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
90 -- where in the run-time we want the explicit version set.
92 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
94 -- Ada version used to compile the runtime. Used to set Ada_Version (but
95 -- not Ada_Version_Explicit) when compiling predefined or internal units.
97 Ada_Final_Suffix : constant String := "final";
98 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
100 -- The name of the procedure that performs the finalization at the end of
101 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
103 Ada_Init_Suffix : constant String := "init";
104 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
106 -- The name of the procedure that performs initialization at the start
107 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
109 Ada_Main_Name_Suffix : constant String := "main";
111 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
112 -- can be referenced in a uniform manner to create either the default
113 -- value of Ada_Main_Name (declared below), or the non-default name
114 -- set by Gnatbind.Scan_Bind_Arg.
116 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
118 -- The name of the Ada package generated by the binder (when in Ada mode).
119 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
121 Address_Clause_Overlay_Warnings : Boolean := True;
123 -- Set False to disable address clause warnings
125 Address_Is_Private : Boolean := False;
127 -- Set True if package System has the line "type Address is private;"
129 All_Errors_Mode : Boolean := False;
131 -- Flag set to force display of multiple errors on a single line and
132 -- also repeated error messages for references to undefined identifiers
133 -- and certain other repeated error messages. Set by use of -gnatf.
135 All_Sources : Boolean := False;
137 -- Set to True to require all source files to be present. This flag is
138 -- directly modified by gnatmake to affect the shared binder routines.
140 Alternate_Main_Name : String_Ptr := null;
142 -- Set to non null when Bind_Alternate_Main_Name is True. This value
143 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
145 ASIS_Mode : Boolean := False;
147 -- Enable semantic checks and tree transformations that are important
148 -- for ASIS but that are usually skipped if Operating_Mode is set to
149 -- Check_Semantics. This flag does not have the corresponding option to set
150 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
151 -- from the code of GNSA-based tool (a client may need to set ON the
152 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
153 -- make very much sense, because GNSA cannot do back annotation).
155 Assertions_Enabled : Boolean := False;
157 -- Enable assertions made using pragma Assert
159 Assume_No_Invalid_Values : Boolean := False;
161 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
162 -- that values could have invalid representations, unless it can clearly
163 -- prove that the values are valid. If this switch is set (by -gnatB or by
164 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
165 -- are valid and in range of their representations. This feature is now
166 -- fully enabled in the compiler.
168 Back_Annotate_Rep_Info : Boolean := False;
170 -- If set True, enables back annotation of representation information
171 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
172 -- (list representation information) or -gnatt (generate tree). It is
173 -- also set true if certain Unchecked_Conversion instantiations require
174 -- checking based on annotated values.
176 Bind_Alternate_Main_Name : Boolean := False;
178 -- True if main should be called Alternate_Main_Name.all.
179 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
181 Bind_Main_Program : Boolean := True;
183 -- Set to False if not binding main Ada program
185 Bind_For_Library : Boolean := False;
187 -- Set to True if the binder needs to generate a file designed for
188 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
190 Bind_Only : Boolean := False;
191 -- GNATMAKE, GPRMAKE, GPRBUILD
192 -- Set to True to skip compile and link steps
193 -- (except when Compile_Only and/or Link_Only are True).
195 Blank_Deleted_Lines : Boolean := False;
197 -- Output empty lines for each line of preprocessed input that is deleted
198 -- in the output, including preprocessor lines starting with a '#'.
200 Brief_Output : Boolean := False;
202 -- Force brief error messages to standard error, even if verbose mode is
203 -- set (so that main error messages go to standard output).
205 Build_Bind_And_Link_Full_Project : Boolean := False;
207 -- Set to True to build, bind and link all the sources of a project file
210 Check_Object_Consistency : Boolean := False;
211 -- GNATBIND, GNATMAKE
212 -- Set to True to check whether every object file is consistent with
213 -- its corresponding ada library information (ALI) file. An object
214 -- file is inconsistent with the corresponding ALI file if the object
215 -- file does not exist or if it has an older time stamp than the ALI file.
216 -- Default above is for GNATBIND. GNATMAKE overrides this default to
217 -- True (see Make.Initialize) since we normally do need to check source
218 -- consistencies in gnatmake.
220 Check_Only : Boolean := False;
222 -- Set to True to do checks only, no output of binder file
224 Check_Policy_List : Node_Id := Empty;
226 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
227 -- that are linked through the Next_Pragma fields, with the list being
228 -- terminated by Empty. The order is most recently processed first.
230 Check_Readonly_Files : Boolean := False;
232 -- Set to True to check readonly files during the make process
234 Check_Source_Files : Boolean := True;
235 -- GNATBIND, GNATMAKE
236 -- Set to True to enable consistency checking for any source files that
237 -- are present (i.e. date must match the date in the library info file).
238 -- Set to False for object file consistency check only. This flag is
239 -- directly modified by gnatmake, to affect the shared binder routines.
241 Check_Switches : Boolean := False;
242 -- GNATMAKE, GPRMAKE, GPBUILD
243 -- Set to True to check compiler options during the make process
245 Check_Unreferenced : Boolean := False;
247 -- Set to True to enable checking for unreferenced entities other
248 -- than formal parameters (for which see Check_Unreferenced_Formals)
250 Check_Unreferenced_Formals : Boolean := False;
252 -- Set True to check for unreferenced formals. This is turned on by
253 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
255 Check_Withs : Boolean := False;
257 -- Set to True to enable checking for unused withs, and also the case
258 -- of withing a package and using none of the entities in the package.
260 Commands_To_Stdout : Boolean := False;
262 -- True if echoed commands to be written to stdout instead of stderr
264 Comment_Deleted_Lines : Boolean := False;
266 -- True if source lines removed by the preprocessor should be commented
267 -- in the output file.
269 Compile_Only : Boolean := False;
270 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
271 -- GNATMAKE, GPRMAKE, GPRMAKE:
272 -- set to True to skip bind and link steps (except when Bind_Only is
274 -- GNATCLEAN, GPRCLEAN:
275 -- set to True to delete only the files produced by the compiler but not
276 -- the library files or the executable files.
278 Config_File : Boolean := True;
280 -- Set to False to inhibit reading and processing of gnat.adc file
282 Config_File_Names : String_List_Access := null;
284 -- Names of configuration pragmas files (given by switches -gnatec)
286 Configurable_Run_Time_Mode : Boolean := False;
288 -- Set True if the compiler is operating in configurable run-time mode.
289 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
290 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
291 -- for details on the handling of the latter pragma.
293 Constant_Condition_Warnings : Boolean := False;
295 -- Set to True to activate warnings on constant conditions
297 Create_Mapping_File : Boolean := False;
299 -- Set to True (-C switch) to indicate that the compiler will be invoked
300 -- with a mapping file (-gnatem compiler switch).
302 Debug_Pragmas_Enabled : Boolean := False;
304 -- Enable debug statements from pragma Debug
306 subtype Debug_Level_Value is Nat range 0 .. 3;
307 Debugger_Level : Debug_Level_Value := 0;
309 -- The value given to the -g parameter. The default value for -g with
310 -- no value is 2. This is usually ignored by GNATBIND, except in the
311 -- VMS version where it is passed as an argument to __gnat_initialize
312 -- to trigger the activation of the remote debugging interface.
313 -- Is this still true ???
315 Debug_Generated_Code : Boolean := False;
317 -- Set True (-gnatD switch) to debug generated expanded code instead
318 -- of the original source code. Causes debugging information to be
319 -- written with respect to the generated code file that is written.
321 Default_Exit_Status : Int := 0;
323 -- Set the default exit status value. Set by the -Xnnn switch for the
326 Default_Stack_Size : Int := -1;
328 -- Set to default primary stack size in units of bytes. Set by
329 -- the -dnnn switch for the binder. A value of -1 indicates that no
330 -- default was set by the binder.
332 Default_Sec_Stack_Size : Int := -1;
334 -- Set to default secondary stack size in units of bytes. Set by
335 -- the -Dnnn switch for the binder. A value of -1 indicates that no
336 -- default was set by the binder, and that the default should be the
337 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
339 Detect_Blocking : Boolean := False;
341 -- Set True to force the run time to raise Program_Error if calls to
342 -- potentially blocking operations are detected from protected actions.
344 Display_Compilation_Progress : Boolean := False;
345 -- GNATMAKE, GPRMAKE, GPRBUILD
346 -- Set True (-d switch) to display information on progress while compiling
347 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
349 type Distribution_Stub_Mode_Type is
352 -- Normal mode, no generation/compilation of distribution stubs
354 Generate_Receiver_Stub_Body,
355 -- The unit being compiled is the RCI body, and the compiler will
356 -- generate the body for the receiver stubs and compile it.
358 Generate_Caller_Stub_Body);
359 -- The unit being compiled is the RCI spec, and the compiler will
360 -- generate the body for the caller stubs and compile it.
362 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
364 -- This enumeration variable indicates the five states of distribution
365 -- annex stub generation/compilation.
367 Do_Not_Execute : Boolean := False;
369 -- Set to True if no actual compilations should be undertaken.
371 Dump_Source_Text : Boolean := False;
373 -- Set to True (by -gnatL) to dump source text intermingled with generated
374 -- code. Effective only if either of Debug/Print_Generated_Code is true.
376 Dynamic_Elaboration_Checks : Boolean := False;
378 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
379 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
381 Dynamic_Stack_Measurement : Boolean := False;
383 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
385 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
387 -- Number of measurements we want to store during dynamic stack analysis.
388 -- When the buffer is full, non-storable results will be output on the fly.
389 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
390 -- by processing of -u flag for gnatbind.
392 Elab_Dependency_Output : Boolean := False;
394 -- Set to True to output complete list of elaboration constraints
396 Elab_Order_Output : Boolean := False;
398 -- Set to True to output chosen elaboration order
400 Elab_Warnings : Boolean := False;
402 -- Set to True to generate full elaboration warnings (-gnatwl)
404 Enable_Overflow_Checks : Boolean := False;
406 -- Set to True if -gnato (enable overflow checks) switch is set,
409 Error_Msg_Line_Length : Nat := 0;
411 -- Records the error message line length limit. If this is set to zero,
412 -- then we get the old style behavior, in which each call to the error
413 -- message routines generates one line of output as a separate message.
414 -- If it is set to a non-zero value, then continuation lines are folded
415 -- to make a single long message, and then this message is split up into
416 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
418 Exception_Handler_Encountered : Boolean := False;
420 -- This flag is set true if the parser encounters an exception handler.
421 -- It is used to set Warn_On_Exception_Propagation True if the restriction
422 -- No_Exception_Propagation is set.
424 Exception_Locations_Suppressed : Boolean := False;
426 -- This flag is set True if a Suppress_Exception_Locations configuration
427 -- pragma is currently active.
429 type Exception_Mechanism_Type is
430 -- Determines the handling of exceptions. See Exp_Ch11 for details
432 (Front_End_Setjmp_Longjmp_Exceptions,
433 -- Exceptions use setjmp/longjmp generated explicitly by the
434 -- front end (this includes gigi or other equivalent parts of
435 -- the code generator). AT END handlers are converted into
436 -- exception handlers by the front end in this mode.
438 Back_End_Exceptions);
439 -- Exceptions are handled by the back end. The front end simply
440 -- generates the handlers as they appear in the source, and AT
441 -- END handlers are left untouched (they are not converted into
442 -- exception handlers when operating in this mode.
443 pragma Convention (C, Exception_Mechanism_Type);
445 Exception_Mechanism : Exception_Mechanism_Type :=
446 Front_End_Setjmp_Longjmp_Exceptions;
448 -- Set to the appropriate value depending on the default as given in
449 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
450 -- The C convention is there to make this variable accessible to gigi.
452 Exception_Tracebacks : Boolean := False;
454 -- Set to True to store tracebacks in exception occurrences (-E)
456 Extensions_Allowed : Boolean := False;
458 -- Set to True by switch -gnatX if GNAT specific language extensions
459 -- are allowed. For example, the use of 'Constrained with objects of
460 -- generic types is a GNAT extension.
462 type External_Casing_Type is (
463 As_Is, -- External names cased as they appear in the Ada source
464 Uppercase, -- External names forced to all uppercase letters
465 Lowercase); -- External names forced to all lowercase letters
467 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
469 -- The setting of this flag determines the casing of external names
470 -- when the name is implicitly derived from an entity name (i.e. either
471 -- no explicit External_Name or Link_Name argument is used, or, in the
472 -- case of extended DEC pragmas, the external name is given using an
473 -- identifier. The As_Is setting is not permitted here (since this would
474 -- create Ada source programs that were case sensitive).
476 External_Name_Exp_Casing : External_Casing_Type := As_Is;
478 -- The setting of this flag determines the casing of an external name
479 -- specified explicitly with a string literal. As_Is means the string
480 -- literal is used as given with no modification to the casing. If
481 -- Lowercase or Uppercase is set, then the string is forced to all
482 -- lowercase or all uppercase letters as appropriate. Note that this
483 -- setting has no effect if the external name is given using an identifier
484 -- in the case of extended DEC import/export pragmas (in this case the
485 -- casing is controlled by External_Name_Imp_Casing), and also has no
486 -- effect if an explicit Link_Name is supplied (a link name is always
487 -- used exactly as given).
489 External_Unit_Compilation_Allowed : Boolean := False;
491 -- When True (set by gnatmake switch -x), allow compilation of sources
492 -- that are not part of any project file.
494 Fast_Math : Boolean := False;
496 -- Indicates the current setting of Fast_Math mode, as set by the use
497 -- of a Fast_Math pragma (set on by Fast_Math (On)).
499 Float_Format : Character := ' ';
501 -- A non-blank value indicates that a Float_Format pragma has been
502 -- processed, in which case this variable is set to 'I' for IEEE or
503 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
506 Float_Format_Long : Character := ' ';
508 -- A non-blank value indicates that a Long_Float pragma has been
509 -- processed (this pragma is recognized only in OpenVMS versions
510 -- of GNAT), in which case this variable is set to D or G for
511 -- D_Float or G_Float.
513 Force_ALI_Tree_File : Boolean := False;
515 -- Force generation of ALI file even if errors are encountered.
516 -- Also forces generation of tree file if -gnatt is also set.
518 Force_Checking_Of_Elaboration_Flags : Boolean := False;
520 -- True if binding with forced checking of the elaboration flags
523 Force_Compilations : Boolean := False;
524 -- GNATMAKE, GPRMAKE, GPRBUILD
525 -- Set to force recompilations even when the objects are up-to-date.
527 Full_Path_Name_For_Brief_Errors : Boolean := False;
529 -- When True, in Brief_Output mode, each error message line
530 -- will start with the full path name of the source.
531 -- When False, only the file name without directory information
534 Full_List : Boolean := False;
536 -- Set True to generate full source listing with embedded errors
538 Full_List_File_Name : String_Ptr := null;
540 -- Set to file name to generate full source listing to named file (or if
541 -- the name is of the form .xxx, then to name.xxx where name is the source
542 -- file name with extension stripped.
544 Generate_Processed_File : Boolean := False;
546 -- True when switch -gnateG is used. When True, create in a file
547 -- <source>.prep, if the source is preprocessed.
549 Generating_Code : Boolean := False;
551 -- True if the frontend finished its work and has called the backend to
552 -- process the tree and generate the object file.
554 Global_Discard_Names : Boolean := False;
556 -- True if a pragma Discard_Names appeared as a configuration pragma for
557 -- the current compilation unit.
559 GNAT_Mode : Boolean := False;
561 -- True if compiling in GNAT system mode (-gnatg switch)
563 HLO_Active : Boolean := False;
565 -- True if High Level Optimizer is activated (-gnatH switch)
567 Identifier_Character_Set : Character;
569 -- This variable indicates the character set to be used for identifiers.
570 -- The possible settings are:
571 -- '1' Latin-5 (ISO-8859-1)
572 -- '2' Latin-5 (ISO-8859-2)
573 -- '3' Latin-5 (ISO-8859-3)
574 -- '4' Latin-5 (ISO-8859-4)
575 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
576 -- '9' Latin-5 (ISO-8859-9)
577 -- 'p' PC (US, IBM page 437)
578 -- '8' PC (European, IBM page 850)
579 -- 'f' Full upper set (all distinct)
580 -- 'n' No upper characters (Ada 83 rules)
581 -- 'w' Latin-1 plus wide characters allowed in identifiers
583 -- The setting affects the set of letters allowed in identifiers and the
584 -- upper/lower case equivalences. It does not affect the interpretation of
585 -- character and string literals, which are always stored using the actual
586 -- coding in the source program. This variable is initialized to the
587 -- default value appropriate to the system (in Osint.Initialize), and then
588 -- reset if a command line switch is used to change the setting.
590 Ignore_Rep_Clauses : Boolean := False;
592 -- Set True to ignore all representation clauses. Useful when compiling
593 -- code from foreign compilers for checking or ASIS purposes. Can be
594 -- set True by use of -gnatI.
596 Implementation_Unit_Warnings : Boolean := True;
598 -- Set True to active warnings for use of implementation internal units.
599 -- Can be controlled by use of -gnatwi/-gnatwI.
601 Implicit_Packing : Boolean := False;
603 -- If set True, then a Size attribute clause on an array is allowed to
604 -- cause implicit packing instead of generating an error message. Set by
605 -- use of pragma Implicit_Packing.
607 Ineffective_Inline_Warnings : Boolean := False;
609 -- Set True to activate warnings if front-end inlining (-gnatN) is not
610 -- able to actually inline a particular call (or all calls). Can be
611 -- controlled by use of -gnatwp/-gnatwP.
613 Init_Or_Norm_Scalars : Boolean := False;
615 -- Set True if a pragma Initialize_Scalars applies to the current unit.
616 -- Also set True if a pragma Normalize_Scalars applies.
618 Initialize_Scalars : Boolean := False;
620 -- Set True if a pragma Initialize_Scalars applies to the current unit.
621 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
623 Initialize_Scalars_Mode1 : Character := 'I';
624 Initialize_Scalars_Mode2 : Character := 'N';
626 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
627 -- is IN (invalid values), used if no -S switch is used.
629 Inline_Active : Boolean := False;
631 -- Set True to activate pragma Inline processing across modules. Default
632 -- for now is not to inline across module boundaries.
634 Interface_Library_Unit : Boolean := False;
636 -- Set to True to indicate that at least one ALI file is an interface ALI:
637 -- then elaboration flag checks are to be generated in the binder
640 Inspector_Mode : Boolean renames Debug.Debug_Flag_Dot_II;
642 -- True if compiling in inspector mode (-gnatd.I switch).
643 -- Enable inspector mode, in particular SCIL generation.
644 -- When VM_Target /= None, the compiler will also attempt to
645 -- generate code even in case of unsupported construct instead of
646 -- displaying an error.
648 Invalid_Value_Used : Boolean := False;
650 -- Set True if a valid Invalid_Value attribute is encountered
652 Follow_Links_For_Files : Boolean := False;
654 -- Set to True (-eL) to process the project files in trusted mode
655 -- If Follow_Links is False, it is assumed that the project doesn't contain
656 -- any file duplicated through symbolic links (although the latter are
657 -- still valid if they point to a file which is outside of the project),
658 -- and that no directory has a name which is a valid source name.
660 Follow_Links_For_Dirs : Boolean := True;
662 -- Whether directories can be links in this project, and therefore
663 -- additional system calls should be performed to ensure we always see the
664 -- same full name for each directory.
666 Front_End_Inlining : Boolean := False;
668 -- Set True to activate inlining by front-end expansion
670 Inline_Processing_Required : Boolean := False;
672 -- Set True if inline processing is required. Inline processing is
673 -- required if an active Inline pragma is processed. The flag is set
674 -- for a pragma Inline or Inline_Always that is actually active.
676 In_Place_Mode : Boolean := False;
678 -- Set True to store ALI and object files in place i.e. in the object
679 -- directory if these files already exist or in the source directory
682 Keep_Going : Boolean := False;
683 -- GNATMAKE, GPRMAKE, GPRBUILD
684 -- When True signals to ignore compilation errors and keep
685 -- processing sources until there is no more work.
687 Keep_Temporary_Files : Boolean := False;
689 -- When True the temporary files created by the GNAT driver are not
690 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
692 Leap_Seconds_Support : Boolean := False;
694 -- Set to True to enable leap seconds support in Ada.Calendar and its
697 Link_Only : Boolean := False;
698 -- GNATMAKE, GPRMAKE, GPRBUILD
699 -- Set to True to skip compile and bind steps
700 -- (except when Bind_Only is set to True).
702 List_Restrictions : Boolean := False;
704 -- Set to True to list restrictions pragmas that could apply to partition
706 List_Units : Boolean := False;
708 -- List units in the active library for a compilation (-gnatu switch)
710 List_Closure : Boolean := False;
712 -- List all sources in the closure of a main (-R gnatbind switch)
714 List_Dependencies : Boolean := False;
716 -- When True gnatmake verifies that the objects are up to date and
717 -- outputs the list of object dependencies (-M switch).
718 -- Output depends if -a switch is used or not.
719 -- This list can be used directly in a Makefile.
721 List_Representation_Info : Int range 0 .. 3 := 0;
723 -- Set non-zero by -gnatR switch to list representation information.
724 -- The settings are as follows:
726 -- 0 = no listing of representation information (default as above)
727 -- 1 = list rep info for user defined record and array types
728 -- 2 = list rep info for all user defined types and objects
729 -- 3 = like 2, but variable fields are decoded symbolically
731 List_Representation_Info_To_File : Boolean := False;
733 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
734 -- to be written to file.rep (where file is the name of the source
735 -- file) instead of stdout. For example, if file x.adb is compiled
736 -- using -gnatR2s then representation info is written to x.adb.ref.
738 List_Representation_Info_Mechanisms : Boolean := False;
740 -- Set true by -gnatRm switch. Causes information on mechanisms to
741 -- be included in the representation output information.
743 List_Preprocessing_Symbols : Boolean := False;
745 -- Set to True if symbols for preprocessing a source are to be listed
746 -- before preprocessing occurs. Set to True by switch -s of gnatprep
747 -- or -s in preprocessing data file for the compiler.
749 type Create_Repinfo_File_Proc is access procedure (Src : String);
750 type Write_Repinfo_Line_Proc is access procedure (Info : String);
751 type Close_Repinfo_File_Proc is access procedure;
752 -- Types used for procedure addresses below
754 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
755 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
756 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
758 -- These three locations are left null when operating in non-compiler
759 -- (e.g. ASIS mode), but when operating in compiler mode, they are
760 -- set to point to the three corresponding procedures in Osint-C. The
761 -- reason for this slightly strange interface is to prevent Repinfo
762 -- from dragging in Osint in ASIS mode, which would include a lot of
763 -- unwanted units in the ASIS build.
765 type Create_List_File_Proc is access procedure (S : String);
766 type Write_List_Info_Proc is access procedure (S : String);
767 type Close_List_File_Proc is access procedure;
768 -- Types used for procedure addresses below
770 Create_List_File_Access : Create_List_File_Proc := null;
771 Write_List_Info_Access : Write_List_Info_Proc := null;
772 Close_List_File_Access : Close_List_File_Proc := null;
774 -- These three locations are left null when operating in non-compiler
775 -- (e.g. from the binder), but when operating in compiler mode, they are
776 -- set to point to the three corresponding procedures in Osint-C. The
777 -- reason for this slightly strange interface is to prevent Repinfo
778 -- from dragging in Osint-C in the binder, which would include unwanted
779 -- units in the binder.
781 Locking_Policy : Character := ' ';
783 -- Set to ' ' for the default case (no locking policy specified).
784 -- Reset to first character (uppercase) of locking policy name if a
785 -- valid pragma Locking_Policy is encountered.
787 Locking_Policy_Sloc : Source_Ptr := No_Location;
789 -- Remember location of previous Locking_Policy pragma. This is used
790 -- for inconsistency error messages. A value of System_Location is
791 -- used if the policy is set in package System.
793 Look_In_Primary_Dir : Boolean := True;
794 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
795 -- Set to False if a -I- was present on the command line.
796 -- When True we are allowed to look in the primary directory to locate
797 -- other source or library files.
799 Make_Steps : Boolean := False;
801 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
804 Main_Index : Int := 0;
806 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
807 -- the main program is the nnn unit in a multi-unit source file.
809 Mapping_File_Name : String_Ptr := null;
811 -- File name of mapping between unit names, file names and path names.
812 -- (given by switch -gnatem)
814 Maximum_Messages : Int := 9999;
816 -- Maximum default number of errors before compilation is terminated, or in
817 -- the case of GNAT, maximum number of warnings before further warnings are
818 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
820 Maximum_File_Name_Length : Int;
822 -- Maximum number of characters allowed in a file name, not counting the
823 -- extension, as set by the appropriate switch. If no switch is given,
824 -- then this value is initialized by Osint to the appropriate value.
826 Maximum_Processes : Positive := 1;
827 -- GNATMAKE, GPRMAKE, GPRBUILD
828 -- Maximum number of processes that should be spawned to carry out
831 Minimal_Recompilation : Boolean := False;
833 -- Set to True if minimal recompilation mode requested
835 Special_Exception_Package_Used : Boolean := False;
837 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
838 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
839 -- local raise statements into gotos in the presence of either package.
841 Multiple_Unit_Index : Int;
843 -- This is set non-zero if the current unit is being compiled in multiple
844 -- unit per file mode, meaning that the current unit is selected from the
845 -- sequence of units in the current source file, using the value stored
846 -- in this variable (e.g. 2 = select second unit in file). A value of
847 -- zero indicates that we are in normal (one unit per file) mode.
849 No_Main_Subprogram : Boolean := False;
850 -- GNATMAKE, GNATBIND
851 -- Set to True if compilation/binding of a program without main
852 -- subprogram requested.
854 No_Run_Time_Mode : Boolean := False;
856 -- This flag is set True if a No_Run_Time pragma is encountered. See
857 -- spec of Rtsfind for a full description of handling of this pragma.
859 No_Stdinc : Boolean := False;
860 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
861 -- Set to True if no default source search dirs added to search list
863 No_Stdlib : Boolean := False;
864 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
865 -- Set to True if no default library search dirs added to search list
867 No_Strict_Aliasing : Boolean := False;
869 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
871 Normalize_Scalars : Boolean := False;
873 -- Set True if a pragma Normalize_Scalars applies to the current unit.
874 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
876 Object_Directory_Present : Boolean := False;
878 -- Set to True when an object directory is specified with option -D
880 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
881 Operating_Mode : Operating_Mode_Type := Generate_Code;
883 -- Indicates the operating mode of the compiler. The default is generate
884 -- code, which runs the parser, semantics and backend. Switches can be
885 -- used to set syntax checking only mode, or syntax and semantics checking
886 -- only mode. Operating_Mode can also be modified as a result of detecting
887 -- errors during the compilation process. In particular if any serious
888 -- error is detected then this flag is reset from Generate_Code to
889 -- Check_Semantics after generating an error message.
891 Optimize_Alignment : Character := 'O';
892 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
893 -- be modified by use of pragma Optimize_Alignment.
895 Optimize_Alignment_Local : Boolean := False;
896 -- Set True if Optimize_Alignment mode is set by a local configuration
897 -- pragma that overrides the gnat.adc (or other configuration file) default
898 -- so that the unit is not dependent on the default setting. Also always
899 -- set True for internal units, since these always have a default setting
900 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
901 -- them all having such an explicit pragma in each unit).
903 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
905 -- Indicates the original operating mode of the compiler as set by
906 -- compiler options. This is identical to Operating_Mode except that
907 -- this is not affected by errors.
909 Optimization_Level : Int;
910 pragma Import (C, Optimization_Level, "optimize");
911 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
912 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
916 pragma Import (C, Optimize_Size, "optimize_size");
917 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
918 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
919 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
921 Output_File_Name_Present : Boolean := False;
922 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
923 -- Set to True when the output C file name is given with option -o for
924 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
925 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
927 Output_Linker_Option_List : Boolean := False;
929 -- True if output of list of linker options is requested (-K switch set)
931 Output_Object_List : Boolean := False;
933 -- True if output of list of objects is requested (-O switch set)
935 Overflow_Checks_Unsuppressed : Boolean := False;
937 -- Set to True if at least one pragma Unsuppress
938 -- (All_Checks|Overflow_Checks) has been processed.
940 Persistent_BSS_Mode : Boolean := False;
942 -- True if a Persistent_BSS configuration pragma is in effect, causing
943 -- potentially persistent data to be placed in the persistent_bss section.
945 Pessimistic_Elab_Order : Boolean := False;
947 -- True if pessimistic elaboration order is to be chosen (-p switch set)
949 Polling_Required : Boolean := False;
951 -- Set to True if polling for asynchronous abort is enabled by using
952 -- the -gnatP option for GNAT.
954 Preprocessing_Data_File : String_Ptr := null;
956 -- Set by switch -gnatep=. The file name of the preprocessing data file.
958 Print_Generated_Code : Boolean := False;
960 -- Set to True to enable output of generated code in source form. This
961 -- flag is set by the -gnatG switch.
963 Print_Standard : Boolean := False;
965 -- Set to true to enable printing of package standard in source form.
966 -- This flag is set by the -gnatS switch
968 Propagate_Exceptions : Boolean := False;
970 -- Indicates if subprogram descriptor exception tables should be
971 -- built for imported subprograms. Set True if a Propagate_Exceptions
972 -- pragma applies to the extended main unit.
974 type Usage is (Unknown, Not_In_Use, In_Use);
975 Project_File_In_Use : Usage := Unknown;
977 -- Indicates if a project file is used or not.
978 -- Set to In_Use by the first SFNP pragma.
980 Queuing_Policy : Character := ' ';
982 -- Set to ' ' for the default case (no queuing policy specified).
983 -- Reset to first character (uppercase) of locking policy name if a valid
984 -- Queuing_Policy pragma is encountered.
986 Queuing_Policy_Sloc : Source_Ptr := No_Location;
988 -- Remember location of previous Queuing_Policy pragma. This is used
989 -- for inconsistency error messages. A value of System_Location is
990 -- used if the policy is set in package System.
992 Quiet_Output : Boolean := False;
993 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
994 -- Set to True if the tool should not have any output if there are no
995 -- errors or warnings.
997 Replace_In_Comments : Boolean := False;
999 -- Set to True if -C switch used
1001 RTS_Lib_Path_Name : String_Ptr := null;
1002 RTS_Src_Path_Name : String_Ptr := null;
1004 -- Set to the "adalib" and "adainclude" directories of the run time
1005 -- specified by --RTS=.
1007 RTS_Switch : Boolean := False;
1008 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1009 -- Set to True when the --RTS switch is set
1011 Run_Path_Option : Boolean := True;
1012 -- GNATMAKE, GNATLINK
1013 -- Set to False when no run_path_option should be issued to the linker
1015 Search_Directory_Present : Boolean := False;
1017 -- Set to True when argument is -I. Reset to False when next argument,
1018 -- a search directory path is taken into account. Note that this is
1019 -- quite different from other switches in this section in that it is
1020 -- only set in a transitory manner as a result of scanning a -I switch
1021 -- with no file name, and if set, is an indication that the next argument
1022 -- is to be treated as a file name.
1024 Sec_Stack_Used : Boolean := False;
1026 -- Set True if generated code uses the System.Secondary_Stack package.
1027 -- For the binder, set if any unit uses the secondary stack package.
1029 Setup_Projects : Boolean := False;
1031 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1032 -- object, library and exec directories.
1034 Shared_Libgnat : Boolean;
1036 -- Set to True if a shared libgnat is requested by using the -shared
1037 -- option for GNATBIND and to False when using the -static option. The
1038 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
1040 Sprint_Line_Limit : Nat := 72;
1041 -- Limit values for chopping long lines in Sprint output, can be reset
1042 -- by use of NNN parameter with -gnatG or -gnatD switches.
1044 Stack_Checking_Enabled : Boolean;
1046 -- Set to indicate if -fstack-check switch is set for the compilation. True
1047 -- means that the switch is set, so that stack checking is enabled. False
1048 -- means that the switch is not set (no stack checking). This value is
1049 -- obtained from the external imported value flag_stack_check in the gcc
1050 -- backend (see Frontend) and may be referenced throughout the compilation
1053 Style_Check : Boolean := False;
1055 -- Set True to perform style checks. Activates checks carried out
1056 -- in package Style (see body of this package for details of checks)
1057 -- This flag is set True by either the -gnatg or -gnaty switches.
1059 Suppress_All_Inlining : Boolean := False;
1061 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1062 -- regardless of any other switches that are set.
1064 Suppress_Control_Flow_Optimizations : Boolean := False;
1066 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1067 -- that interfere with coverage analysis based on the object code.
1069 System_Extend_Pragma_Arg : Node_Id := Empty;
1071 -- Set non-empty if and only if a correct Extend_System pragma was present
1072 -- in which case it points to the argument of the pragma, and the name can
1073 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1075 System_Extend_Unit : Node_Id := Empty;
1077 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1078 -- is never appropriate in GNAT_Mode (and causes troubles, including
1079 -- bogus circularities, if we try to compile the run-time library with
1080 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1081 -- is a copy of the value set in System_Extend_Pragma_Arg.
1083 Subunits_Missing : Boolean := False;
1085 -- This flag is set true if missing subunits are detected with code
1086 -- generation active. This causes code generation to be skipped.
1088 Suppress_Checks : Boolean := False;
1090 -- Set to True if -gnatp (suppress all checks) switch present.
1092 Suppress_Options : Suppress_Array;
1094 -- Flags set True to suppress corresponding check, i.e. add an implicit
1095 -- pragma Suppress at the outer level of each unit compiled. Note that
1096 -- these suppress actions can be overridden by the use of the Unsuppress
1097 -- pragma. This variable is initialized by Osint.Initialize.
1099 Suppress_Back_Annotation : Boolean := False;
1101 -- This flag is set True if back annotation of representation information
1102 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1103 -- This avoids unnecessary time being spent on back annotation.
1105 Table_Factor : Int := 1;
1107 -- Factor by which all initial table sizes set in Alloc are multiplied.
1108 -- Used in Table to calculate initial table sizes (the initial table size
1109 -- is the value in Alloc, used as the Table_Initial parameter value,
1110 -- multiplied by the factor given here. The default value is used if no
1111 -- -gnatT switch appears.
1113 Tagged_Type_Expansion : Boolean := True;
1115 -- Set True if tagged types and interfaces should be expanded by the
1116 -- front-end. If False, the original tree is left unexpanded for
1117 -- tagged types and dispatching calls, assuming the underlying target
1118 -- supports it (e.g. case of JVM).
1120 Task_Dispatching_Policy : Character := ' ';
1122 -- Set to ' ' for the default case (no task dispatching policy specified).
1123 -- Reset to first character (uppercase) of task dispatching policy name
1124 -- if a valid Task_Dispatching_Policy pragma is encountered.
1126 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1128 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1129 -- used for inconsistency error messages. A value of System_Location is
1130 -- used if the policy is set in package System.
1132 Tasking_Used : Boolean := False;
1133 -- Set True if any tasking construct is encountered. Used to activate the
1134 -- output of the Q, L and T lines in ALI files.
1136 Time_Slice_Set : Boolean := False;
1138 -- Set True if a pragma Time_Slice is processed in the main unit, or
1139 -- if the -gnatTnn switch is present to set a time slice value.
1141 Time_Slice_Value : Nat;
1143 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1144 -- Time_Slice pragma has been processed. Set to the time slice value in
1145 -- microseconds. Negative values are stored as zero, and the value is not
1146 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1147 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1149 Tolerate_Consistency_Errors : Boolean := False;
1151 -- Tolerate time stamp and other consistency errors. If this flag is set to
1152 -- True (-t), then inconsistencies result in warnings rather than errors.
1154 Treat_Restrictions_As_Warnings : Boolean := False;
1156 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1159 Tree_Output : Boolean := False;
1161 -- Set to True (-gnatt) to generate output tree file
1163 True_VMS_Target : Boolean := False;
1164 -- Set True if we are on a VMS target. The setting of this flag reflects
1165 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1166 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1167 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1169 Try_Semantics : Boolean := False;
1171 -- Flag set to force attempt at semantic analysis, even if parser errors
1172 -- occur. This will probably cause blowups at this stage in the game. On
1173 -- the other hand, most such blowups will be caught cleanly and simply
1174 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1176 Unchecked_Shared_Lib_Imports : Boolean := False;
1178 -- Set to True when shared library projects are allowed to import projects
1179 -- that are not shared library projects. Set by switch
1180 -- --unchecked-shared-lib-imports.
1182 Undefined_Symbols_Are_False : Boolean := False;
1184 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1185 -- file for the compiler. Indicates that while preprocessing sources,
1186 -- symbols that are not defined have the value FALSE.
1188 Unique_Error_Tag : Boolean := Tag_Errors;
1190 -- Indicates if error messages are to be prefixed by the string error:
1191 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1193 Universal_Addressing_On_AAMP : Boolean := False;
1195 -- Indicates if library-level objects should be accessed and updated using
1196 -- universal addressing instructions on the AAMP architecture. This flag is
1197 -- set to True when pragma Universal_Data is given as a configuration
1200 Unreserve_All_Interrupts : Boolean := False;
1202 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1203 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1204 -- corresponding attribute set in GNATBIND.
1206 Upper_Half_Encoding : Boolean := False;
1208 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1209 -- used in the normal way to represent themselves. If the wide character
1210 -- encoding method uses the upper bit for this encoding, then this flag is
1211 -- set True, and upper half characters in the source indicate the start of
1212 -- a wide character sequence. Set by -gnatW or -W switches.
1214 Usage_Requested : Boolean := False;
1215 -- GNAT, GNATBIND, GNATMAKE
1216 -- Set to True if -h (-gnath for the compiler) switch encountered
1217 -- requesting usage information
1219 Use_Pragma_Linker_Constructor : Boolean := False;
1221 -- True if pragma Linker_Constructor applies to adainit
1223 Use_VADS_Size : Boolean := False;
1225 -- Set to True if a valid pragma Use_VADS_Size is processed
1227 Validity_Checks_On : Boolean := True;
1229 -- This flag determines if validity checking is on or off. The initial
1230 -- state is on, and the required default validity checks are active. The
1231 -- actual set of checks that is performed if Validity_Checks_On is set is
1232 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1233 -- is controlled by pragma Validity_Checks (On | Off), and also some
1234 -- generated compiler code (typically code that has to do with validity
1235 -- check generation) is compiled with this flag set to False. This flag is
1236 -- set to False by the -gnatp switch.
1238 Verbose_Mode : Boolean := False;
1239 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1240 -- GPRMAKE, GPRBUILD, GPRCLEAN
1241 -- Set to True to get verbose mode (full error message text and location
1242 -- information sent to standard output, also header, copyright and summary)
1244 type Verbosity_Level_Type is (None, Low, Medium, High);
1245 Verbosity_Level : Verbosity_Level_Type := High;
1246 -- GNATMAKE, GPRMAKE
1247 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1248 -- the level of verbosity of informational messages:
1250 -- In Low Verbosity, the reasons why a source is recompiled, the name
1251 -- of the executable and the reason it must be rebuilt is output.
1253 -- In Medium Verbosity, additional lines are output for each ALI file
1256 -- In High Verbosity, additional lines are output when the ALI file
1257 -- is part of an Ada library, is read-only or is part of the runtime.
1259 Warn_On_Ada_2005_Compatibility : Boolean := True;
1261 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1262 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1263 -- mode. Set False by -gnatwY.
1265 Warn_On_Parameter_Order : Boolean := False;
1267 -- Set to True to generate warnings for cases where the argument list for
1268 -- a call is a sequence of identifiers that match the formal identifiers,
1269 -- but are in the wrong order.
1271 Warn_On_Assertion_Failure : Boolean := True;
1273 -- Set to True to activate warnings on assertions that can be determined
1274 -- at compile time will always fail. Set false by -gnatw.A.
1276 Warn_On_Assumed_Low_Bound : Boolean := True;
1278 -- Set to True to activate warnings for string parameters that are indexed
1279 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1280 -- False by -gnatwW.
1282 Warn_On_Bad_Fixed_Value : Boolean := False;
1284 -- Set to True to generate warnings for static fixed-point expression
1285 -- values that are not an exact multiple of the small value of the type.
1287 Warn_On_Biased_Representation : Boolean := True;
1289 -- Set to True to generate warnings for size clauses, component clauses
1290 -- and component_size clauses that force biased representation. Set False
1293 Warn_On_Constant : Boolean := False;
1295 -- Set to True to generate warnings for variables that could be declared
1296 -- as constants. Modified by use of -gnatwk/K.
1298 Warn_On_Deleted_Code : Boolean := False;
1300 -- Set to True to generate warnings for code deleted by the front end
1301 -- for conditional statements whose outcome is known at compile time.
1302 -- Modified by use of -gnatwt/T.
1304 Warn_On_Dereference : Boolean := False;
1306 -- Set to True to generate warnings for implicit dereferences for array
1307 -- indexing and record component access. Modified by use of -gnatwd/D.
1309 Warn_On_Export_Import : Boolean := True;
1311 -- Set to True to generate warnings for suspicious use of export or
1312 -- import pragmas. Modified by use of -gnatwx/X.
1314 Warn_On_Hiding : Boolean := False;
1316 -- Set to True to generate warnings if a declared entity hides another
1317 -- entity. The default is that this warning is suppressed.
1319 Warn_On_Modified_Unread : Boolean := False;
1321 -- Set to True to generate warnings if a variable is assigned but is never
1322 -- read. Also controls warnings for similar cases involving out parameters,
1323 -- but only if there is only one out parameter for the procedure involved.
1324 -- The default is that this warning is suppressed.
1326 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1328 -- Set to True to generate warnings in all cases where a variable is
1329 -- modified by being passed as to an OUT formal, but the resulting value is
1330 -- never read. The default is that this warning is suppressed, except in
1333 Warn_On_No_Value_Assigned : Boolean := True;
1335 -- Set to True to generate warnings if no value is ever assigned to a
1336 -- variable that is at least partially uninitialized. Set to false to
1337 -- suppress such warnings. The default is that such warnings are enabled.
1339 Warn_On_Non_Local_Exception : Boolean := False;
1341 -- Set to True to generate warnings for non-local exception raises and also
1342 -- handlers that can never handle a local raise. This warning is only ever
1343 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1344 -- default is not to generate the warnings except that if the source has
1345 -- at least one exception handler, and this restriction is set, and the
1346 -- warning was not explicitly turned off, then it is turned on by default.
1348 No_Warn_On_Non_Local_Exception : Boolean := False;
1350 -- This is set to True if the above warning is explicitly suppressed. We
1351 -- use this to avoid turning it on by default when No_Exception_Propagation
1352 -- restriction is set and an exception handler is present.
1354 Warn_On_Obsolescent_Feature : Boolean := False;
1356 -- Set to True to generate warnings on use of any feature in Annex or if a
1357 -- subprogram is called for which a pragma Obsolescent applies.
1359 Warn_On_Questionable_Missing_Parens : Boolean := True;
1361 -- Set to True to generate warnings for cases where parentheses are missing
1362 -- and the usage is questionable, because the intent is unclear.
1364 Warn_On_Redundant_Constructs : Boolean := False;
1366 -- Set to True to generate warnings for redundant constructs (e.g. useless
1367 -- assignments/conversions). The default is that this warning is disabled.
1369 Warn_On_Object_Renames_Function : Boolean := False;
1371 -- Set to True to generate warnings when a function result is renamed as
1372 -- an object. The default is that this warning is disabled.
1374 Warn_On_Reverse_Bit_Order : Boolean := True;
1376 -- Set to True to generate warning (informational) messages for component
1377 -- clauses that are affected by non-standard bit-order. The default is
1378 -- that this warning is enabled.
1380 Warn_On_Unchecked_Conversion : Boolean := True;
1382 -- Set to True to generate warnings for unchecked conversions that may have
1383 -- non-portable semantics (e.g. because sizes of types differ). The default
1384 -- is that this warning is enabled.
1386 Warn_On_Unrecognized_Pragma : Boolean := True;
1388 -- Set to True to generate warnings for unrecognized pragmas. The default
1389 -- is that this warning is enabled.
1391 Warn_On_Unrepped_Components : Boolean := False;
1393 -- Set to True to generate warnings for the case of components of record
1394 -- which have a record representation clause but this component does not
1395 -- have a component clause. The default is that this warning is disabled.
1397 Warn_On_Warnings_Off : Boolean := False;
1399 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1400 -- where either the pragma is never used, or it could be replaced by a
1401 -- pragma Unmodified or Unreferenced.
1403 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1404 Warning_Mode : Warning_Mode_Type := Normal;
1406 -- Controls treatment of warning messages. If set to Suppress, warning
1407 -- messages are not generated at all. In Normal mode, they are generated
1408 -- but do not count as errors. In Treat_As_Error mode, warning messages
1409 -- are generated and are treated as errors.
1411 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1413 -- Method used for encoding wide characters in the source program. See
1414 -- description of type in unit System.WCh_Con for a list of the methods
1415 -- that are currently supported. Note that brackets notation is always
1416 -- recognized in source programs regardless of the setting of this
1417 -- variable. The default setting causes only the brackets notation to be
1418 -- recognized. If this is the main unit, this setting also controls the
1419 -- output of the W=? parameter in the ALI file, which is used to provide
1420 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1421 -- the value set here overrides this main unit default.
1423 Wide_Character_Encoding_Method_Specified : Boolean := False;
1425 -- Set True if the value in Wide_Character_Encoding_Method was set as
1426 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1428 Xref_Active : Boolean := True;
1430 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1432 Zero_Formatting : Boolean := False;
1434 -- Do no formatting (no title, no leading spaces, no empty lines) in
1435 -- auxiliary outputs (-e, -K, -l, -R).
1437 ----------------------------
1438 -- Configuration Settings --
1439 ----------------------------
1441 -- These are settings that are used to establish the mode at the start of
1442 -- each unit. The values defined below can be affected either by command
1443 -- line switches, or by the use of appropriate configuration pragmas in a
1444 -- configuration pragma file.
1446 Ada_Version_Config : Ada_Version_Type;
1448 -- This is the value of the configuration switch for the Ada 83 mode, as
1449 -- set by the command line switches -gnat83/95/05, and possibly modified by
1450 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1451 -- to set the initial value for Ada_Version mode at the start of analysis
1452 -- of a unit. Note however, that the setting of this flag is ignored for
1453 -- internal and predefined units (which are always compiled in the most up
1454 -- to date version of Ada).
1456 Ada_Version_Explicit_Config : Ada_Version_Type;
1458 -- This is set in the same manner as Ada_Version_Config. The difference is
1459 -- that the setting of this flag is not ignored for internal and predefined
1460 -- units, which for some purposes do indeed access this value, regardless
1461 -- of the fact that they are compiled the most up to date ada version).
1463 Assertions_Enabled_Config : Boolean;
1465 -- This is the value of the configuration switch for assertions enabled
1466 -- mode, as possibly set by the command line switch -gnata, and possibly
1467 -- modified by the use of the configuration pragma Assertion_Policy.
1469 Assume_No_Invalid_Values_Config : Boolean;
1471 -- This is the value of the configuration switch for assuming "no invalid
1472 -- values enabled" mode, as possibly set by the command line switch
1473 -- -gnatB, and possibly modified by the use of the configuration pragma
1474 -- Assume_No_Invalid_Values.
1476 Check_Policy_List_Config : Node_Id;
1478 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1479 -- that are linked through the Next_Pragma fields, with the list being
1480 -- terminated by Empty. The order is most recently processed first. This
1481 -- list includes only those pragmas in configuration pragma files.
1483 Debug_Pragmas_Enabled_Config : Boolean;
1485 -- This is the value of the configuration switch for debug pragmas enabled
1486 -- mode, as possibly set by the command line switch -gnata and possibly
1487 -- modified by the use of the configuration pragma Debug_Policy.
1489 Dynamic_Elaboration_Checks_Config : Boolean := False;
1491 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1492 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1494 Exception_Locations_Suppressed_Config : Boolean := False;
1496 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1498 Extensions_Allowed_Config : Boolean;
1500 -- This is the flag that indicates whether extensions are allowed. It can
1501 -- be set True either by use of the -gnatX switch, or by use of the
1502 -- configuration pragma Extensions_Allowed (On). It is always set to True
1503 -- for internal GNAT units, since extensions are always permitted in such
1506 External_Name_Exp_Casing_Config : External_Casing_Type;
1508 -- This is the value of the configuration switch that controls casing of
1509 -- external symbols for which an explicit external name is given. It can be
1510 -- set to Uppercase by the command line switch -gnatF, and further modified
1511 -- by the use of the configuration pragma External_Name_Casing in the
1512 -- gnat.adc file. This flag is used to set the initial value for
1513 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1514 -- however that the setting of this flag is ignored for internal and
1515 -- predefined units (which are always compiled with As_Is mode).
1517 External_Name_Imp_Casing_Config : External_Casing_Type;
1519 -- This is the value of the configuration switch that controls casing of
1520 -- external symbols where the external name is implicitly given. It can be
1521 -- set to Uppercase by the command line switch -gnatF, and further modified
1522 -- by the use of the configuration pragma External_Name_Casing in the
1523 -- gnat.adc file. This flag is used to set the initial value for
1524 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1525 -- however that the setting of this flag is ignored for internal and
1526 -- predefined units (which are always compiled with Lowercase mode).
1528 Fast_Math_Config : Boolean;
1530 -- This is the value of the configuration switch that controls Fast_Math
1531 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1532 -- used to set the initial value of Fast_Math at the start of each new
1533 -- compilation unit.
1535 Optimize_Alignment_Config : Character;
1537 -- This is the value of the configuration switch that controls the
1538 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1539 -- It is used to set the initial value of Optimize_Alignment at the start
1540 -- of each new compilation unit, except that it is always set to 'O' (off)
1541 -- for internal units.
1543 Persistent_BSS_Mode_Config : Boolean;
1545 -- This is the value of the configuration switch that controls whether
1546 -- potentially persistent data is to be placed in the persistent_bss
1547 -- section. It can be set True by use of the pragma Persistent_BSS.
1548 -- This flag is used to set the initial value of Persistent_BSS_Mode
1549 -- at the start of each compilation unit, except that it is always
1550 -- set False for predefined units.
1552 Polling_Required_Config : Boolean;
1554 -- This is the value of the configuration switch that controls polling
1555 -- mode. It can be set True by the command line switch -gnatP, and then
1556 -- further modified by the use of pragma Polling in the gnat.adc file. This
1557 -- flag is used to set the initial value for Polling_Required at the start
1558 -- of analyzing each unit.
1560 Use_VADS_Size_Config : Boolean;
1562 -- This is the value of the configuration switch that controls the use of
1563 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1564 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1565 -- This flag is used to set the initial value for Use_VADS_Size at the
1566 -- start of analyzing each unit. Note however that the setting of this flag
1567 -- is ignored for internal and predefined units (which are always compiled
1568 -- with the standard Size semantics).
1570 type Config_Switches_Type is private;
1571 -- Type used to save values of the switches set from Config values
1573 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1574 -- This procedure saves the current values of the switches which are
1575 -- initialized from the above Config values, and then resets these switches
1576 -- according to the Config value settings.
1578 procedure Set_Opt_Config_Switches
1579 (Internal_Unit : Boolean;
1580 Main_Unit : Boolean);
1581 -- This procedure sets the switches to the appropriate initial values. The
1582 -- parameter Internal_Unit is True for an internal or predefined unit, and
1583 -- affects the way the switches are set (see above). Main_Unit is true if
1584 -- switches are being set for the main unit (this affects setting of the
1585 -- assert/debug pragma switches, which are normally set false by default
1586 -- for an internal unit, except when the internal unit is the main unit,
1587 -- in which case we use the command line settings).
1589 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1590 -- This procedure restores a set of switch values previously saved by a
1591 -- call to Save_Opt_Switches.
1593 procedure Register_Opt_Config_Switches;
1594 -- This procedure is called after processing the gnat.adc file and other
1595 -- configuration pragma files to record the values of the Config switches,
1596 -- as possibly modified by the use of command line switches and pragmas
1597 -- appearing in these files.
1599 ------------------------
1600 -- Other Global Flags --
1601 ------------------------
1603 Expander_Active : Boolean := False;
1604 -- A flag that indicates if expansion is active (True) or deactivated
1605 -- (False). When expansion is deactivated all calls to expander routines
1606 -- have no effect. Note that the initial setting of False is merely to
1607 -- prevent saving of an undefined value for an initial call to the
1608 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1609 -- this flag, see package Expander. Indeed this flag might more logically
1610 -- be in the spec of Expander, but it is referenced by Errout, and it
1611 -- really seems wrong for Errout to depend on Expander.
1613 Static_Dispatch_Tables : Boolean := True;
1614 -- This flag indicates if the backend supports generation of statically
1615 -- allocated dispatch tables. If it is True, then the front end will
1616 -- generate static aggregates for dispatch tables that contain forward
1617 -- references to addresses of subprograms not seen yet, and the back end
1618 -- must be prepared to handle this case. If it is False, then the front
1619 -- end generates assignments to initialize the dispatch table, and there
1620 -- are no such forward references. By default we build statically allocated
1621 -- dispatch tables for all library level tagged types in all platforms.This
1622 -- behavior can be disabled using switch -gnatd.t which will set this flag
1623 -- to False and revert to the previous dynamic behavior.
1625 -----------------------
1626 -- Tree I/O Routines --
1627 -----------------------
1629 procedure Tree_Read;
1630 -- Reads switch settings from current tree file using Tree_Read
1632 procedure Tree_Write;
1633 -- Writes out switch settings to current tree file using Tree_Write
1635 --------------------------
1636 -- ASIS Version Control --
1637 --------------------------
1639 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1640 -- are supposed to be used in the GNAT/ASIS version check performed in
1641 -- the ASIS code (this package is also a part of the ASIS implementation).
1642 -- They are set by Tree_Read procedure, so they represent the version
1643 -- number (and the version string) of the compiler which has created the
1644 -- tree, and they are supposed to be compared with the corresponding values
1645 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1648 Tree_Version_String : String_Access;
1649 -- Used to store the compiler version string read from a tree file to check
1650 -- if it is from the same date as stored in the version string in Gnatvsn.
1651 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1652 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1653 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1654 -- of the corresponding source sets, using version strings that may be
1655 -- of different lengths.
1657 Tree_ASIS_Version_Number : Int;
1658 -- Used to store the ASIS version number read from a tree file to check if
1659 -- it is the same as stored in the ASIS version number in Tree_IO.
1663 -- The following type is used to save and restore settings of switches in
1664 -- Opt that represent the configuration (i.e. result of config pragmas).
1666 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1667 -- flag that once set does not get reset, since the whole idea of this flag
1668 -- is to record the setting for the main unit.
1670 type Config_Switches_Type is record
1671 Ada_Version : Ada_Version_Type;
1672 Ada_Version_Explicit : Ada_Version_Type;
1673 Assertions_Enabled : Boolean;
1674 Assume_No_Invalid_Values : Boolean;
1675 Check_Policy_List : Node_Id;
1676 Debug_Pragmas_Enabled : Boolean;
1677 Dynamic_Elaboration_Checks : Boolean;
1678 Exception_Locations_Suppressed : Boolean;
1679 Extensions_Allowed : Boolean;
1680 External_Name_Exp_Casing : External_Casing_Type;
1681 External_Name_Imp_Casing : External_Casing_Type;
1682 Fast_Math : Boolean;
1683 Optimize_Alignment : Character;
1684 Optimize_Alignment_Local : Boolean;
1685 Persistent_BSS_Mode : Boolean;
1686 Polling_Required : Boolean;
1687 Use_VADS_Size : Boolean;
1690 -- The following declarations are for GCC version dependent flags. We do
1691 -- not let client code in the compiler test GCC_Version directly, but
1692 -- instead use deferred constants for relevant feature tags.
1694 -- Note: there currently are no such constants defined in this section,
1695 -- since the compiler front end is currently entirely independent of the
1696 -- GCC version, which is a desirable state of affairs.
1698 function get_gcc_version return Int;
1699 pragma Import (C, get_gcc_version, "get_gcc_version");
1701 GCC_Version : constant Nat := get_gcc_version;
1703 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1704 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.