1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2007, 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package contains global flags set by the initialization routine from
35 -- the command line and referenced throughout the compiler, the binder, or
36 -- other GNAT tools. The comments indicate which options are used by which
37 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
40 with Hostparm; use Hostparm;
41 with Types; use Types;
43 with System.Strings; use System.Strings;
44 with System.WCh_Con; use System.WCh_Con;
48 ----------------------------------------------
49 -- Settings of Modes for Current Processing --
50 ----------------------------------------------
52 -- The following mode values represent the current state of processing.
53 -- The values set here are the default values. Unless otherwise noted,
54 -- the value may be reset in Switch-? with an appropropiate switch. In
55 -- some cases, the values can also be modified by pragmas, and in the
56 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
57 -- the default values.
59 Ada_Bind_File : Boolean := True;
61 -- Set True if binder file to be generated in Ada rather than C
63 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
64 pragma Warnings (Off, Ada_Version_Type);
65 -- Versions of Ada for Ada_Version below. Note that these are ordered,
66 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
67 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
68 -- which we want to allow, so that things work OK when Ada_15 is added!
69 -- This warning is now removed, so this pragma can be removed some time???
71 Ada_Version_Default : Ada_Version_Type := Ada_05;
73 -- Default Ada version if no switch given
75 Ada_Version : Ada_Version_Type := Ada_Version_Default;
77 -- Current Ada version for compiler, as set by configuration pragmas,
78 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
79 -- predefined or internal file is compiled.
81 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
83 -- Like Ada_Version, but does not get set implicitly for predefined
84 -- or internal units, so it reflects the Ada version explicitly set
85 -- using configuration pragmas or compiler switches (or if neither
86 -- appears, it remains set to Ada_Version_Default). This is used in
87 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
88 -- where in the run-time we want the explicit version set.
90 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
92 -- Ada version used to compile the runtime. Used to set Ada_Version (but
93 -- not Ada_Version_Explicit) when compiling predefined or internal units.
95 Ada_Final_Suffix : constant String := "final";
96 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
98 -- The name of the procedure that performs the finalization at the end of
99 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
101 Ada_Init_Suffix : constant String := "init";
102 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
104 -- The name of the procedure that performs initialization at the start
105 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
107 Ada_Main_Name_Suffix : constant String := "main";
109 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
110 -- can be referenced in a uniform manner to create either the default
111 -- value of Ada_Main_Name (declared below), or the non-default name
112 -- set by Gnatbind.Scan_Bind_Arg.
114 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
116 -- The name of the Ada package generated by the binder (when in Ada mode).
117 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
119 Address_Clause_Overlay_Warnings : Boolean := True;
121 -- Set False to disable address clause warnings
123 Address_Is_Private : Boolean := False;
125 -- Set True if package System has the line "type Address is private;"
127 All_Errors_Mode : Boolean := False;
129 -- Flag set to force display of multiple errors on a single line and
130 -- also repeated error messages for references to undefined identifiers
131 -- and certain other repeated error messages. Set by use of -gnatf.
133 All_Sources : Boolean := False;
135 -- Set to True to require all source files to be present. This flag is
136 -- directly modified by gnatmake to affect the shared binder routines.
138 Alternate_Main_Name : String_Ptr := null;
140 -- Set to non null when Bind_Alternate_Main_Name is True. This value
141 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
143 Assertions_Enabled : Boolean := False;
145 -- Enable assertions made using pragma Assert
147 ASIS_Mode : Boolean := False;
149 -- Enable semantic checks and tree transformations that are important
150 -- for ASIS but that are usually skipped if Operating_Mode is set to
151 -- Check_Semantics. This flag does not have the corresponding option to set
152 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
153 -- from the code of GNSA-based tool (a client may need to set ON the
154 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
155 -- make very much sense, because GNSA cannot do back annotation).
157 Back_Annotate_Rep_Info : Boolean := False;
159 -- If set True, enables back annotation of representation information
160 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
161 -- (list representation information) or -gnatt (generate tree). It is
162 -- also set true if certain Unchecked_Conversion instantiations require
163 -- checking based on annotated values.
165 Bind_Alternate_Main_Name : Boolean := False;
167 -- True if main should be called Alternate_Main_Name.all.
168 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
170 Bind_Main_Program : Boolean := True;
172 -- Set to False if not binding main Ada program
174 Bind_For_Library : Boolean := False;
176 -- Set to True if the binder needs to generate a file designed for
177 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
179 Bind_Only : Boolean := False;
181 -- Set to True to skip compile and link steps
182 -- (except when Compile_Only and/or Link_Only are True).
184 Blank_Deleted_Lines : Boolean := False;
186 -- Output empty lines for each line of preprocessed input that is deleted
187 -- in the output, including preprocessor lines starting with a '#'.
189 Brief_Output : Boolean := False;
191 -- Force brief error messages to standard error, even if verbose mode is
192 -- set (so that main error messages go to standard output).
194 Build_Bind_And_Link_Full_Project : Boolean := False;
196 -- Set to True to build, bind and link all the sources of a project file
199 Check_Object_Consistency : Boolean := False;
200 -- GNATBIND, GNATMAKE
201 -- Set to True to check whether every object file is consistent with
202 -- its corresponding ada library information (ALI) file. An object
203 -- file is inconsistent with the corresponding ALI file if the object
204 -- file does not exist or if it has an older time stamp than the ALI file.
205 -- Default above is for GNATBIND. GNATMAKE overrides this default to
206 -- True (see Make.Initialize) since we normally do need to check source
207 -- consistencies in gnatmake.
209 Check_Only : Boolean := False;
211 -- Set to True to do checks only, no output of binder file
213 Check_Readonly_Files : Boolean := False;
215 -- Set to True to check readonly files during the make process
217 Check_Source_Files : Boolean := True;
218 -- GNATBIND, GNATMAKE
219 -- Set to True to enable consistency checking for any source files that
220 -- are present (i.e. date must match the date in the library info file).
221 -- Set to False for object file consistency check only. This flag is
222 -- directly modified by gnatmake, to affect the shared binder routines.
224 Check_Switches : Boolean := False;
226 -- Set to True to check compiler options during the make process
228 Check_Unreferenced : Boolean := False;
230 -- Set to True to enable checking for unreferenced entities other
231 -- than formal parameters (for which see Check_Unreferenced_Formals)
233 Check_Unreferenced_Formals : Boolean := False;
235 -- Set True to check for unreferenced formals. This is turned on by
236 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
238 Check_Withs : Boolean := False;
240 -- Set to True to enable checking for unused withs, and also the case
241 -- of withing a package and using none of the entities in the package.
243 Commands_To_Stdout : Boolean := False;
245 -- True if echoed commands to be written to stdout instead of stderr
247 Comment_Deleted_Lines : Boolean := False;
249 -- True if source lines removed by the preprocessor should be commented
250 -- in the output file.
252 Compile_Only : Boolean := False;
253 -- GNATMAKE, GNATCLEAN, GPRMAKE
254 -- GNATMAKE, GPRMAKE: set to True to skip bind and link steps (except when
255 -- Bind_Only is True).
256 -- GNATCLEAN: set to True to delete only the files produced by the compiler
257 -- but not the library files or the executable files.
259 Config_File : Boolean := True;
261 -- Set to False to inhibit reading and processing of gnat.adc file
263 Config_File_Names : String_List_Access := null;
265 -- Names of configuration pragmas files (given by switches -gnatec)
267 Configurable_Run_Time_Mode : Boolean := False;
269 -- Set True if the compiler is operating in configurable run-time mode.
270 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
271 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
272 -- for details on the handling of the latter pragma.
274 Constant_Condition_Warnings : Boolean := False;
276 -- Set to True to activate warnings on constant conditions
278 Create_Mapping_File : Boolean := False;
280 -- Set to True (-C switch) to indicate that the compiler will be invoked
281 -- with a mapping file (-gnatem compiler switch).
283 Debug_Pragmas_Enabled : Boolean := False;
285 -- Enable debug statements from pragma Debug
287 subtype Debug_Level_Value is Nat range 0 .. 3;
288 Debugger_Level : Debug_Level_Value := 0;
290 -- The value given to the -g parameter. The default value for -g with
291 -- no value is 2. This is usually ignored by GNATBIND, except in the
292 -- VMS version where it is passed as an argument to __gnat_initialize
293 -- to trigger the activation of the remote debugging interface.
294 -- Is this still true ???
296 Debug_Generated_Code : Boolean := False;
298 -- Set True (-gnatD switch) to debug generated expanded code instead
299 -- of the original source code. Causes debugging information to be
300 -- written with respect to the generated code file that is written.
302 Default_Exit_Status : Int := 0;
304 -- Set the default exit status value. Set by the -Xnnn switch for the
307 Default_Stack_Size : Int := -1;
309 -- Set to default primary stack size in units of bytes. Set by
310 -- the -dnnn switch for the binder. A value of -1 indicates that no
311 -- default was set by the binder.
313 Default_Sec_Stack_Size : Int := -1;
315 -- Set to default secondary stack size in units of bytes. Set by
316 -- the -Dnnn switch for the binder. A value of -1 indicates that no
317 -- default was set by the binder, and that the default should be the
318 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
320 Detect_Blocking : Boolean := False;
322 -- Set True to force the run time to raise Program_Error if calls to
323 -- potentially blocking operations are detected from protected actions.
325 Display_Compilation_Progress : Boolean := False;
327 -- Set True (-d switch) to display information on progress while compiling
328 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
330 type Distribution_Stub_Mode_Type is
333 -- Normal mode, no generation/compilation of distribution stubs
335 Generate_Receiver_Stub_Body,
336 -- The unit being compiled is the RCI body, and the compiler will
337 -- generate the body for the receiver stubs and compile it.
339 Generate_Caller_Stub_Body);
340 -- The unit being compiled is the RCI spec, and the compiler will
341 -- generate the body for the caller stubs and compile it.
343 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
345 -- This enumeration variable indicates the five states of distribution
346 -- annex stub generation/compilation.
348 Do_Not_Execute : Boolean := False;
350 -- Set to True if no actual compilations should be undertaken.
352 Dump_Source_Text : Boolean := False;
354 -- Set to True (by -gnatL) to dump source text intermingled with generated
355 -- code. Effective only if either of Debug/Print_Generated_Code is true.
357 Dynamic_Elaboration_Checks : Boolean := False;
359 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
360 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
362 Dynamic_Stack_Measurement : Boolean := False;
364 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
366 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
368 -- Number of measurements we want to store during dynamic stack analysis.
369 -- When the buffer is full, non-storable results will be output on the fly.
370 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
371 -- by processing of -u flag for gnatbind.
373 Elab_Dependency_Output : Boolean := False;
375 -- Set to True to output complete list of elaboration constraints
377 Elab_Order_Output : Boolean := False;
379 -- Set to True to output chosen elaboration order
381 Elab_Warnings : Boolean := False;
383 -- Set to True to generate full elaboration warnings (-gnatwl)
385 Enable_Overflow_Checks : Boolean := False;
387 -- Set to True if -gnato (enable overflow checks) switch is set,
390 Error_Msg_Line_Length : Nat := 0;
392 -- Records the error message line length limit. If this is set to zero,
393 -- then we get the old style behavior, in which each call to the error
394 -- message routines generates one line of output as a separate message.
395 -- If it is set to a non-zero value, then continuation lines are folded
396 -- to make a single long message, and then this message is split up into
397 -- multiple lines not exceeding the specified length. Set by -gnatLnnn.
399 Exception_Locations_Suppressed : Boolean := False;
401 -- This flag is set True if a Suppress_Exception_Locations configuration
402 -- pragma is currently active.
404 type Exception_Mechanism_Type is
405 -- Determines the handling of exceptions. See Exp_Ch11 for details
407 (Front_End_Setjmp_Longjmp_Exceptions,
408 -- Exceptions use setjmp/longjmp generated explicitly by the
409 -- front end (this includes gigi or other equivalent parts of
410 -- the code generator). AT END handlers are converted into
411 -- exception handlers by the front end in this mode.
413 Back_End_Exceptions);
414 -- Exceptions are handled by the back end. The front end simply
415 -- generates the handlers as they appear in the source, and AT
416 -- END handlers are left untouched (they are not converted into
417 -- exception handlers when operating in this mode.
418 pragma Convention (C, Exception_Mechanism_Type);
420 Exception_Mechanism : Exception_Mechanism_Type :=
421 Front_End_Setjmp_Longjmp_Exceptions;
423 -- Set to the appropriate value depending on the default as given in
424 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
425 -- The C convention is there to make this variable accessible to gigi.
427 Exception_Tracebacks : Boolean := False;
429 -- Set to True to store tracebacks in exception occurrences (-E)
431 Extensions_Allowed : Boolean := False;
433 -- Set to True by switch -gnatX if GNAT specific language extensions
434 -- are allowed. For example, the use of 'Constrained with objects of
435 -- generic types is a GNAT extension.
437 type External_Casing_Type is (
438 As_Is, -- External names cased as they appear in the Ada source
439 Uppercase, -- External names forced to all uppercase letters
440 Lowercase); -- External names forced to all lowercase letters
442 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
444 -- The setting of this flag determines the casing of external names
445 -- when the name is implicitly derived from an entity name (i.e. either
446 -- no explicit External_Name or Link_Name argument is used, or, in the
447 -- case of extended DEC pragmas, the external name is given using an
448 -- identifier. The As_Is setting is not permitted here (since this would
449 -- create Ada source programs that were case sensitive).
451 External_Name_Exp_Casing : External_Casing_Type := As_Is;
453 -- The setting of this flag determines the casing of an external name
454 -- specified explicitly with a string literal. As_Is means the string
455 -- literal is used as given with no modification to the casing. If
456 -- Lowercase or Uppercase is set, then the string is forced to all
457 -- lowercase or all uppercase letters as appropriate. Note that this
458 -- setting has no effect if the external name is given using an identifier
459 -- in the case of extended DEC import/export pragmas (in this case the
460 -- casing is controlled by External_Name_Imp_Casing), and also has no
461 -- effect if an explicit Link_Name is supplied (a link name is always
462 -- used exactly as given).
464 External_Unit_Compilation_Allowed : Boolean := False;
466 -- When True (set by gnatmake switch -x), allow compilation of sources
467 -- that are not part of any project file.
469 Float_Format : Character := ' ';
471 -- A non-blank value indicates that a Float_Format pragma has been
472 -- processed, in which case this variable is set to 'I' for IEEE or
473 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
476 Float_Format_Long : Character := ' ';
478 -- A non-blank value indicates that a Long_Float pragma has been
479 -- processed (this pragma is recognized only in OpenVMS versions
480 -- of GNAT), in which case this variable is set to D or G for
481 -- D_Float or G_Float.
483 Force_ALI_Tree_File : Boolean := False;
485 -- Force generation of ALI file even if errors are encountered.
486 -- Also forces generation of tree file if -gnatt is also set.
488 Force_Checking_Of_Elaboration_Flags : Boolean := False;
490 -- True if binding with forced checking of the elaboration flags
493 Force_Compilations : Boolean := False;
495 -- Set to force recompilations even when the objects are up-to-date.
497 Full_Path_Name_For_Brief_Errors : Boolean := False;
498 -- GNAT, GNATMAKE, GNATCLEAN, GPRMAKE
499 -- When True, in Brief_Output mode, each error message line
500 -- will start with the full path name of the source.
501 -- When False, only the file name without directory information
504 Full_List : Boolean := False;
506 -- Set True to generate full source listing with embedded errors
508 Full_List_File_Name : String_Ptr := null;
510 -- Set to file name to generate full source listing to named file (or if
511 -- the name is of the form .xxx, then to name.xxx where name is the source
512 -- file name with extension stripped.
514 Generating_Code : Boolean := False;
516 -- True if the frontend finished its work and has called the backend to
517 -- processs the tree and generate the object file.
519 Global_Discard_Names : Boolean := False;
521 -- True if a pragma Discard_Names appeared as a configuration pragma for
522 -- the current compilation unit.
524 GNAT_Mode : Boolean := False;
526 -- True if compiling in GNAT system mode (-gnatg switch)
528 HLO_Active : Boolean := False;
530 -- True if High Level Optimizer is activated (-gnatH switch)
532 Identifier_Character_Set : Character;
534 -- This variable indicates the character set to be used for identifiers.
535 -- The possible settings are:
536 -- '1' Latin-5 (ISO-8859-1)
537 -- '2' Latin-5 (ISO-8859-2)
538 -- '3' Latin-5 (ISO-8859-3)
539 -- '4' Latin-5 (ISO-8859-4)
540 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
541 -- '9' Latin-5 (ISO-8859-9)
542 -- 'p' PC (US, IBM page 437)
543 -- '8' PC (European, IBM page 850)
544 -- 'f' Full upper set (all distinct)
545 -- 'n' No upper characters (Ada 83 rules)
546 -- 'w' Latin-1 plus wide characters allowed in identifiers
548 -- The setting affects the set of letters allowed in identifiers and the
549 -- upper/lower case equivalences. It does not affect the interpretation of
550 -- character and string literals, which are always stored using the actual
551 -- coding in the source program. This variable is initialized to the
552 -- default value appropriate to the system (in Osint.Initialize), and then
553 -- reset if a command line switch is used to change the setting.
555 Ignore_Rep_Clauses : Boolean := False;
557 -- Set True to ignore all representation clauses. Useful when compiling
558 -- code from foreign compilers for checking or ASIS purposes. Can be
559 -- set True by use of -gnatI.
561 Implementation_Unit_Warnings : Boolean := True;
563 -- Set True to active warnings for use of implementation internal units.
564 -- Can be controlled by use of -gnatwi/-gnatwI.
566 Implicit_Packing : Boolean := False;
568 -- If set True, then a Size attribute clause on an array is allowed to
569 -- cause implicit packing instead of generating an error message. Set by
570 -- use of pragma Implicit_Packing.
572 Ineffective_Inline_Warnings : Boolean := False;
574 -- Set True to activate warnings if front-end inlining (-gnatN) is not
575 -- able to actually inline a particular call (or all calls). Can be
576 -- controlled by use of -gnatwp/-gnatwP.
578 Init_Or_Norm_Scalars : Boolean := False;
580 -- Set True if a pragma Initialize_Scalars applies to the current unit.
581 -- Also set True if a pragma Normalize_Scalars applies.
583 Initialize_Scalars : Boolean := False;
585 -- Set True if a pragma Initialize_Scalars applies to the current unit.
586 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
588 Initialize_Scalars_Mode1 : Character := 'I';
589 Initialize_Scalars_Mode2 : Character := 'N';
591 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
592 -- is IN (invalid values), used if no -S switch is used.
594 Inline_Active : Boolean := False;
596 -- Set True to activate pragma Inline processing across modules. Default
597 -- for now is not to inline across module boundaries.
599 Interface_Library_Unit : Boolean := False;
601 -- Set to True to indicate that at least one ALI file is an interface ALI:
602 -- then elaboration flag checks are to be generated in the binder
605 Inspector_Mode : Boolean renames Debug.Debug_Flag_Dot_II;
607 -- True if compiling in inspector mode (-gnatd.I switch).
608 -- Only relevant when VM_Target /= None. The compiler will attempt to
609 -- generate code even in case of unsupported construct, so that the byte
610 -- code can be used by static analysis tools.
612 Follow_Links : Boolean := False;
614 -- Set to True (-eL) to process the project files in trusted mode
616 Front_End_Inlining : Boolean := False;
618 -- Set True to activate inlining by front-end expansion
620 Inline_Processing_Required : Boolean := False;
622 -- Set True if inline processing is required. Inline processing is
623 -- required if an active Inline pragma is processed. The flag is set
624 -- for a pragma Inline or Inline_Always that is actually active.
626 In_Place_Mode : Boolean := False;
628 -- Set True to store ALI and object files in place ie in the object
629 -- directory if these files already exist or in the source directory
632 Keep_Going : Boolean := False;
634 -- When True signals to ignore compilation errors and keep
635 -- processing sources until there is no more work.
637 Keep_Temporary_Files : Boolean := False;
639 -- When True the temporary files created by the GNAT driver are not
640 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
642 Leap_Seconds_Support : Boolean := False;
644 -- Set to True to enable leap seconds support in Ada.Calendar and its
647 Link_Only : Boolean := False;
649 -- Set to True to skip compile and bind steps
650 -- (except when Bind_Only is set to True).
652 List_Restrictions : Boolean := False;
654 -- Set to True to list restrictions pragmas that could apply to partition
656 List_Units : Boolean := False;
658 -- List units in the active library for a compilation (-gnatu switch)
660 List_Closure : Boolean := False;
662 -- List all sources in the closure of a main (-R gnatbind switch)
664 List_Dependencies : Boolean := False;
666 -- When True gnatmake verifies that the objects are up to date and
667 -- outputs the list of object dependencies (-M switch).
668 -- Output depends if -a switch is used or not.
669 -- This list can be used directly in a Makefile.
671 List_Representation_Info : Int range 0 .. 3 := 0;
673 -- Set non-zero by -gnatR switch to list representation information.
674 -- The settings are as follows:
676 -- 0 = no listing of representation information (default as above)
677 -- 1 = list rep info for user defined record and array types
678 -- 2 = list rep info for all user defined types and objects
679 -- 3 = like 2, but variable fields are decoded symbolically
681 List_Representation_Info_To_File : Boolean := False;
683 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
684 -- to be written to file.rep (where file is the name of the source
685 -- file) instead of stdout. For example, if file x.adb is compiled
686 -- using -gnatR2s then representation info is written to x.adb.ref.
688 List_Representation_Info_Mechanisms : Boolean := False;
690 -- Set true by -gnatRm switch. Causes information on mechanisms to
691 -- be included in the representation output information.
693 List_Preprocessing_Symbols : Boolean := False;
695 -- Set to True if symbols for preprocessing a source are to be listed
696 -- before preprocessing occurs. Set to True by switch -s of gnatprep
697 -- or -s in preprocessing data file for the compiler.
699 type Create_Repinfo_File_Proc is access procedure (Src : String);
700 type Write_Repinfo_Line_Proc is access procedure (Info : String);
701 type Close_Repinfo_File_Proc is access procedure;
702 -- Types used for procedure addresses below
704 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
705 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
706 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
708 -- These three locations are left null when operating in non-compiler
709 -- (e.g. ASIS mode), but when operating in compiler mode, they are
710 -- set to point to the three corresponding procedures in Osint-C. The
711 -- reason for this slightly strange interface is to prevent Repinfo
712 -- from dragging in Osint in ASIS mode, which would include a lot of
713 -- unwanted units in the ASIS build.
715 type Create_List_File_Proc is access procedure (S : String);
716 type Write_List_Info_Proc is access procedure (S : String);
717 type Close_List_File_Proc is access procedure;
718 -- Types used for procedure addresses below
720 Create_List_File_Access : Create_List_File_Proc := null;
721 Write_List_Info_Access : Write_List_Info_Proc := null;
722 Close_List_File_Access : Close_List_File_Proc := null;
724 -- These three locations are left null when operating in non-compiler
725 -- (e.g. from the binder), but when operating in compiler mode, they are
726 -- set to point to the three corresponding procedures in Osint-C. The
727 -- reason for this slightly strange interface is to prevent Repinfo
728 -- from dragging in Osint-C in the binder, which would include unwanted
729 -- units in the binder.
731 Locking_Policy : Character := ' ';
733 -- Set to ' ' for the default case (no locking policy specified).
734 -- Reset to first character (uppercase) of locking policy name if a
735 -- valid pragma Locking_Policy is encountered.
737 Locking_Policy_Sloc : Source_Ptr := No_Location;
739 -- Remember location of previous Locking_Policy pragma. This is used
740 -- for inconsistency error messages. A value of System_Location is
741 -- used if the policy is set in package System.
743 Look_In_Primary_Dir : Boolean := True;
744 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
745 -- Set to False if a -I- was present on the command line.
746 -- When True we are allowed to look in the primary directory to locate
747 -- other source or library files.
749 Make_Steps : Boolean := False;
751 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
754 Main_Index : Int := 0;
756 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
757 -- the main program is the nnn unit in a multi-unit source file.
759 Mapping_File_Name : String_Ptr := null;
761 -- File name of mapping between unit names, file names and path names.
762 -- (given by switch -gnatem)
764 Maximum_Errors : Int := 9999;
766 -- Maximum default number of errors before compilation is terminated.
767 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
769 Maximum_File_Name_Length : Int;
771 -- Maximum number of characters allowed in a file name, not counting the
772 -- extension, as set by the appropriate switch. If no switch is given,
773 -- then this value is initialized by Osint to the appropriate value.
775 Maximum_Processes : Positive := 1;
777 -- Maximum number of processes that should be spawned to carry out
780 Minimal_Recompilation : Boolean := False;
782 -- Set to True if minimal recompilation mode requested
784 Special_Exception_Package_Used : Boolean := False;
786 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
787 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
788 -- local raise statements into gotos in the presence of either package.
790 Multiple_Unit_Index : Int;
792 -- This is set non-zero if the current unit is being compiled in multiple
793 -- unit per file mode, meaning that the current unit is selected from the
794 -- sequence of units in the current source file, using the value stored
795 -- in this variable (e.g. 2 = select second unit in file). A value of
796 -- zero indicates that we are in normal (one unit per file) mode.
798 No_Main_Subprogram : Boolean := False;
799 -- GNATMAKE, GNATBIND
800 -- Set to True if compilation/binding of a program without main
801 -- subprogram requested.
803 No_Run_Time_Mode : Boolean := False;
805 -- This flag is set True if a No_Run_Time pragma is encountered. See
806 -- spec of Rtsfind for a full description of handling of this pragma.
808 No_Stdinc : Boolean := False;
809 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
810 -- Set to True if no default source search dirs added to search list
812 No_Stdlib : Boolean := False;
813 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
814 -- Set to True if no default library search dirs added to search list
816 No_Strict_Aliasing : Boolean := False;
818 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
820 Normalize_Scalars : Boolean := False;
822 -- Set True if a pragma Normalize_Scalars applies to the current unit.
823 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
825 Object_Directory_Present : Boolean := False;
827 -- Set to True when an object directory is specified with option -D
829 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
830 Operating_Mode : Operating_Mode_Type := Generate_Code;
832 -- Indicates the operating mode of the compiler. The default is generate
833 -- code, which runs the parser, semantics and backend. Switches can be
834 -- used to set syntax checking only mode, or syntax and semantics checking
835 -- only mode. Operating_Mode can also be modified as a result of detecting
836 -- errors during the compilation process. In particular if any serious
837 -- error is detected then this flag is reset from Generate_Code to
838 -- Check_Semantics after generating an error message.
840 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
842 -- Indicates the original operating mode of the compiler as set by
843 -- compiler options. This is identical to Operating_Mode except that
844 -- this is not affected by errors.
846 Optimization_Level : Int;
847 pragma Import (C, Optimization_Level, "optimize");
848 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
850 Output_File_Name_Present : Boolean := False;
851 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
852 -- Set to True when the output C file name is given with option -o
853 -- for GNATBIND, when the object file name is given with option
854 -- -gnatO for GNAT or when the executable is given with option -o
855 -- for GNATMAKE or GPRMAKE.
857 Output_Linker_Option_List : Boolean := False;
859 -- True if output of list of linker options is requested (-K switch set)
861 Output_Object_List : Boolean := False;
863 -- True if output of list of objects is requested (-O switch set)
865 Overflow_Checks_Unsuppressed : Boolean := False;
867 -- Set to True if at least one pragma Unsuppress
868 -- (All_Checks|Overflow_Checks) has been processed.
870 Persistent_BSS_Mode : Boolean := False;
872 -- True if a Persistent_BSS configuration pragma is in effect, causing
873 -- potentially persistent data to be placed in the persistent_bss section.
875 Pessimistic_Elab_Order : Boolean := False;
877 -- True if pessimistic elaboration order is to be chosen (-p switch set)
879 Polling_Required : Boolean := False;
881 -- Set to True if polling for asynchronous abort is enabled by using
882 -- the -gnatP option for GNAT.
884 Preprocessing_Data_File : String_Ptr := null;
886 -- Set by switch -gnatep=. The file name of the prepocessing data file.
888 Print_Generated_Code : Boolean := False;
890 -- Set to True to enable output of generated code in source form. This
891 -- flag is set by the -gnatG switch.
893 Print_Standard : Boolean := False;
895 -- Set to true to enable printing of package standard in source form.
896 -- This flag is set by the -gnatS switch
898 Propagate_Exceptions : Boolean := False;
900 -- Indicates if subprogram descriptor exception tables should be
901 -- built for imported subprograms. Set True if a Propagate_Exceptions
902 -- pragma applies to the extended main unit.
904 type Usage is (Unknown, Not_In_Use, In_Use);
905 Project_File_In_Use : Usage := Unknown;
907 -- Indicates if a project file is used or not.
908 -- Set to In_Use by the first SFNP pragma.
910 Queuing_Policy : Character := ' ';
912 -- Set to ' ' for the default case (no queuing policy specified).
913 -- Reset to first character (uppercase) of locking policy name if a valid
914 -- Queuing_Policy pragma is encountered.
916 Queuing_Policy_Sloc : Source_Ptr := No_Location;
918 -- Remember location of previous Queuing_Policy pragma. This is used
919 -- for inconsistency error messages. A value of System_Location is
920 -- used if the policy is set in package System.
922 Quiet_Output : Boolean := False;
923 -- GNATMAKE, GNATCLEAN, GPRMAKE
924 -- Set to True if the tool should not have any output if there are no
925 -- errors or warnings.
927 Replace_In_Comments : Boolean := False;
929 -- Set to True if -C switch used
931 RTS_Lib_Path_Name : String_Ptr := null;
932 RTS_Src_Path_Name : String_Ptr := null;
934 -- Set to the "adalib" and "adainclude" directories of the run time
935 -- specified by --RTS=.
937 RTS_Switch : Boolean := False;
938 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
939 -- Set to True when the --RTS switch is set
941 Run_Path_Option : Boolean := True;
942 -- GNATMAKE, GNATLINK
943 -- Set to False when no run_path_option should be issued to the linker
945 Search_Directory_Present : Boolean := False;
947 -- Set to True when argument is -I. Reset to False when next argument,
948 -- a search directory path is taken into account. Note that this is
949 -- quite different from other switches in this section in that it is
950 -- only set in a transitory manner as a result of scanning a -I switch
951 -- with no file name, and if set, is an indication that the next argument
952 -- is to be treated as a file name.
954 Sec_Stack_Used : Boolean := False;
956 -- Set True if generated code uses the System.Secondary_Stack package.
957 -- For the binder, set if any unit uses the secondary stack package.
959 Setup_Projects : Boolean := False;
961 -- Set to True for GNAT SETUP: the Project Manager creates non existing
962 -- object, library and exec directories.
964 Shared_Libgnat : Boolean;
966 -- Set to True if a shared libgnat is requested by using the -shared
967 -- option for GNATBIND and to False when using the -static option. The
968 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
970 Stack_Checking_Enabled : Boolean;
972 -- Set to indicate if -fstack-check switch is set for the compilation. True
973 -- means that the switch is set, so that stack checking is enabled. False
974 -- means that the switch is not set (no stack checking). This value is
975 -- obtained from the external imported value flag_stack_check in the gcc
976 -- backend (see Frontend) and may be referenced throughout the compilation
979 Style_Check : Boolean := False;
981 -- Set True to perform style checks. Activates checks carried out
982 -- in package Style (see body of this package for details of checks)
983 -- This flag is set True by either the -gnatg or -gnaty switches.
985 System_Extend_Pragma_Arg : Node_Id := Empty;
987 -- Set non-empty if and only if a correct Extend_System pragma was present
988 -- in which case it points to the argument of the pragma, and the name can
989 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
991 System_Extend_Unit : Node_Id := Empty;
993 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
994 -- is never appropriate in GNAT_Mode (and causes troubles, including
995 -- bogus circularities, if we try to compile the run-time library with
996 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
997 -- is a copy of the value set in System_Extend_Pragma_Arg.
999 Subunits_Missing : Boolean := False;
1001 -- This flag is set true if missing subunits are detected with code
1002 -- generation active. This causes code generation to be skipped.
1004 Suppress_Checks : Boolean := False;
1006 -- Set to True if -gnatp (suppress all checks) switch present.
1008 Suppress_Options : Suppress_Array;
1010 -- Flags set True to suppress corresponding check, i.e. add an implicit
1011 -- pragma Suppress at the outer level of each unit compiled. Note that
1012 -- these suppress actions can be overridden by the use of the Unsuppress
1013 -- pragma. This variable is initialized by Osint.Initialize.
1015 Suppress_Back_Annotation : Boolean := False;
1017 -- This flag is set True if back annotation of representation information
1018 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1019 -- This avoids unnecessary time being spent on back annotation.
1021 Table_Factor : Int := 1;
1023 -- Factor by which all initial table sizes set in Alloc are multiplied.
1024 -- Used in Table to calculate initial table sizes (the initial table size
1025 -- is the value in Alloc, used as the Table_Initial parameter value,
1026 -- multiplied by the factor given here. The default value is used if no
1027 -- -gnatT switch appears.
1029 Task_Dispatching_Policy : Character := ' ';
1031 -- Set to ' ' for the default case (no task dispatching policy specified).
1032 -- Reset to first character (uppercase) of task dispatching policy name
1033 -- if a valid Task_Dispatching_Policy pragma is encountered.
1035 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1037 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1038 -- used for inconsistency error messages. A value of System_Location is
1039 -- used if the policy is set in package System.
1041 Tasking_Used : Boolean := False;
1042 -- Set True if any tasking construct is encountered. Used to activate the
1043 -- output of the Q, L and T lines in ALI files.
1045 Time_Slice_Set : Boolean := False;
1047 -- Set True if a pragma Time_Slice is processed in the main unit, or
1048 -- if the -gnatTnn switch is present to set a time slice value.
1050 Time_Slice_Value : Nat;
1052 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1053 -- Time_Slice pragma has been processed. Set to the time slice value in
1054 -- microseconds. Negative values are stored as zero, and the value is not
1055 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1056 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1058 Tolerate_Consistency_Errors : Boolean := False;
1060 -- Tolerate time stamp and other consistency errors. If this flag is set to
1061 -- True (-t), then inconsistencies result in warnings rather than errors.
1063 Tree_Output : Boolean := False;
1065 -- Set to True (-gnatt) to generate output tree file
1067 Try_Semantics : Boolean := False;
1069 -- Flag set to force attempt at semantic analysis, even if parser errors
1070 -- occur. This will probably cause blowups at this stage in the game. On
1071 -- the other hand, most such blowups will be caught cleanly and simply
1072 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1074 Undefined_Symbols_Are_False : Boolean := False;
1076 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1077 -- file for the compiler. Indicates that while preprocessing sources,
1078 -- symbols that are not defined have the value FALSE.
1080 Unique_Error_Tag : Boolean := Tag_Errors;
1082 -- Indicates if error messages are to be prefixed by the string error:
1083 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1085 Universal_Addressing_On_AAMP : Boolean := False;
1087 -- Indicates if library-level objects should be accessed and updated using
1088 -- universal addressing instructions on the AAMP architecture. This flag is
1089 -- set to True when pragma Universal_Data is given as a configuration
1092 Unreserve_All_Interrupts : Boolean := False;
1094 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1095 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1096 -- corresponding attribute set in GNATBIND.
1098 Upper_Half_Encoding : Boolean := False;
1100 -- Normally set False, indicating that upper half ASCII characters are
1101 -- used in the normal way to represent themselves. If the wide character
1102 -- encoding method uses the upper bit for this encoding, then this flag is
1103 -- set True, and upper half characters in the source indicate the start of
1104 -- a wide character sequence.
1106 Usage_Requested : Boolean := False;
1107 -- GNAT, GNATBIND, GNATMAKE
1108 -- Set to True if -h (-gnath for the compiler) switch encountered
1109 -- requesting usage information
1111 Use_Pragma_Linker_Constructor : Boolean := False;
1113 -- True if pragma Linker_Constructor applies to adainit
1115 Use_VADS_Size : Boolean := False;
1117 -- Set to True if a valid pragma Use_VADS_Size is processed
1119 Validity_Checks_On : Boolean := True;
1121 -- This flag determines if validity checking is on or off. The initial
1122 -- state is on, and the required default validity checks are active. The
1123 -- actual set of checks that is performed if Validity_Checks_On is set is
1124 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1125 -- is controlled by pragma Validity_Checks (On | Off), and also some
1126 -- generated compiler code (typically code that has to do with validity
1127 -- check generation) is compiled with this flag set to False. This flag is
1128 -- set to False by the -gnatp switch.
1130 Verbose_Mode : Boolean := False;
1131 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1133 -- Set to True to get verbose mode (full error message text and location
1134 -- information sent to standard output, also header, copyright and summary)
1136 type Verbosity_Level_Type is (None, Low, Medium, High);
1137 Verbosity_Level : Verbosity_Level_Type := High;
1138 -- GNATMAKE, GPRMAKE
1139 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1140 -- the level of verbosity of informational messages:
1142 -- In Low Verbosity, the reasons why a source is recompiled, the name
1143 -- of the executable and the reason it must be rebuilt is output.
1145 -- In Medium Verbosity, additional lines are output for each ALI file
1148 -- In High Verbosity, additional lines are output when the ALI file
1149 -- is part of an Ada library, is read-only or is part of the runtime.
1151 Warn_On_Ada_2005_Compatibility : Boolean := True;
1153 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1154 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1155 -- mode. Set False by -gnatwY.
1157 Warn_On_Assumed_Low_Bound : Boolean := True;
1159 -- Set to True to activate warnings for string parameters that are indexed
1160 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1161 -- False by -gnatwW.
1163 Warn_On_Bad_Fixed_Value : Boolean := False;
1165 -- Set to True to generate warnings for static fixed-point expression
1166 -- values that are not an exact multiple of the small value of the type.
1168 Warn_On_Constant : Boolean := False;
1170 -- Set to True to generate warnings for variables that could be declared
1171 -- as constants. Modified by use of -gnatwk/K.
1173 Warn_On_Deleted_Code : Boolean := False;
1175 -- Set to True to generate warnings for code deleted by the front end
1176 -- for conditional statements whose outcome is known at compile time.
1177 -- Modified by use of -gnatwt/T.
1179 Warn_On_Dereference : Boolean := False;
1181 -- Set to True to generate warnings for implicit dereferences for array
1182 -- indexing and record component access. Modified by use of -gnatwd/D.
1184 Warn_On_Export_Import : Boolean := True;
1186 -- Set to True to generate warnings for suspicious use of export or
1187 -- import pragmas. Modified by use of -gnatwx/X.
1189 Warn_On_Hiding : Boolean := False;
1191 -- Set to True to generate warnings if a declared entity hides another
1192 -- entity. The default is that this warning is suppressed.
1194 Warn_On_Modified_Unread : Boolean := False;
1196 -- Set to True to generate warnings if a variable is assigned but is never
1197 -- read. The default is that this warning is suppressed.
1199 Warn_On_Out_Parameter_Unread : Boolean := False;
1201 -- Set to True to generate warnings if a variable is modified by being
1202 -- passed as to an IN OUT or OUT formal, but the resulting value is never
1203 -- read. The default is that this warning is suppressed.
1205 Warn_On_No_Value_Assigned : Boolean := True;
1207 -- Set to True to generate warnings if no value is ever assigned to a
1208 -- variable that is at least partially uninitialized. Set to false to
1209 -- suppress such warnings. The default is that such warnings are enabled.
1211 Warn_On_Non_Local_Exception : Boolean := False;
1213 -- Set to True to generate warnings for non-local exception raises and also
1214 -- handlers that can never handle a local raise. This warning is only ever
1215 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1216 -- default is not to generate the warnings even if the restriction is set.
1218 Warn_On_Obsolescent_Feature : Boolean := False;
1220 -- Set to True to generate warnings on use of any feature in Annex or if a
1221 -- subprogram is called for which a pragma Obsolescent applies.
1223 Warn_On_Questionable_Missing_Parens : Boolean := True;
1225 -- Set to True to generate warnings for cases where parenthese are missing
1226 -- and the usage is questionable, because the intent is unclear.
1228 Warn_On_Redundant_Constructs : Boolean := False;
1230 -- Set to True to generate warnings for redundant constructs (e.g. useless
1231 -- assignments/conversions). The default is that this warning is disabled.
1233 Warn_On_Object_Renames_Function : Boolean := False;
1235 -- Set to True to generate warnings when a function result is renamed as
1236 -- an object. The default is that this warning is disabled.
1238 Warn_On_Reverse_Bit_Order : Boolean := True;
1240 -- Set to True to generate warning (informational) messages for component
1241 -- clauses that are affected by non-standard bit-order. The default is
1242 -- that this warning is enabled.
1244 Warn_On_Unchecked_Conversion : Boolean := True;
1246 -- Set to True to generate warnings for unchecked conversions that may have
1247 -- non-portable semantics (e.g. because sizes of types differ). The default
1248 -- is that this warning is enabled.
1250 Warn_On_Unrecognized_Pragma : Boolean := True;
1252 -- Set to True to generate warnings for unrecognized pragmas. The default
1253 -- is that this warning is enabled.
1255 Warn_On_Unrepped_Components : Boolean := False;
1257 -- Set to True to generate warnings for the case of components of record
1258 -- which have a record representation clause but this component does not
1259 -- have a component clause. The default is that this warning is disabled.
1261 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1262 Warning_Mode : Warning_Mode_Type := Normal;
1264 -- Controls treatment of warning messages. If set to Suppress, warning
1265 -- messages are not generated at all. In Normal mode, they are generated
1266 -- but do not count as errors. In Treat_As_Error mode, warning messages
1267 -- are generated and are treated as errors.
1269 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1271 -- Method used for encoding wide characters in the source program. See
1272 -- description of type in unit System.WCh_Con for a list of the methods
1273 -- that are currently supported. Note that brackets notation is always
1274 -- recognized in source programs regardless of the setting of this
1275 -- variable. The default setting causes only the brackets notation to be
1276 -- recognized. If this is the main unit, this setting also controls the
1277 -- output of the W=? parameter in the ALI file, which is used to provide
1278 -- the default for Wide_Text_IO files.
1280 Xref_Active : Boolean := True;
1282 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1284 Zero_Formatting : Boolean := False;
1286 -- Do no formatting (no title, no leading spaces, no empty lines) in
1287 -- auxiliary outputs (-e, -K, -l, -R).
1289 ----------------------------
1290 -- Configuration Settings --
1291 ----------------------------
1293 -- These are settings that are used to establish the mode at the start of
1294 -- each unit. The values defined below can be affected either by command
1295 -- line switches, or by the use of appropriate configuration pragmas in the
1298 Ada_Version_Config : Ada_Version_Type;
1300 -- This is the value of the configuration switch for the Ada 83 mode, as
1301 -- set by the command line switches -gnat83/95/05, and possibly modified by
1302 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1303 -- to set the initial value for Ada_Version mode at the start of analysis
1304 -- of a unit. Note however, that the setting of this flag is ignored for
1305 -- internal and predefined units (which are always compiled in the most up
1306 -- to date version of Ada).
1308 Ada_Version_Explicit_Config : Ada_Version_Type;
1310 -- This is set in the same manner as Ada_Version_Config. The difference is
1311 -- that the setting of this flag is not ignored for internal and predefined
1312 -- units, which for some purposes do indeed access this value, regardless
1313 -- of the fact that they are compiled the the most up to date ada version).
1315 Assertions_Enabled_Config : Boolean;
1317 -- This is the value of the configuration switch for assertions enabled
1318 -- mode, as possibly set by the command line switch -gnata, and possibly
1319 -- modified by the use of the configuration pragma Assertion_Policy.
1321 Debug_Pragmas_Enabled_Config : Boolean;
1323 -- This is the value of the configuration switch for debug pragmas enabled
1324 -- mode, as possibly set by the command line switch -gnata and possibly
1325 -- modified by the use of the configuration pragma Debug_Policy.
1327 Dynamic_Elaboration_Checks_Config : Boolean := False;
1329 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1330 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1332 Exception_Locations_Suppressed_Config : Boolean := False;
1334 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1336 Extensions_Allowed_Config : Boolean;
1338 -- This is the flag that indicates whether extensions are allowed. It can
1339 -- be set True either by use of the -gnatX switch, or by use of the
1340 -- configuration pragma Extensions_Allowed (On). It is always set to True
1341 -- for internal GNAT units, since extensions are always permitted in such
1344 External_Name_Exp_Casing_Config : External_Casing_Type;
1346 -- This is the value of the configuration switch that controls casing of
1347 -- external symbols for which an explicit external name is given. It can be
1348 -- set to Uppercase by the command line switch -gnatF, and further modified
1349 -- by the use of the configuration pragma External_Name_Casing in the
1350 -- gnat.adc file. This flag is used to set the initial value for
1351 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1352 -- however that the setting of this flag is ignored for internal and
1353 -- predefined units (which are always compiled with As_Is mode).
1355 External_Name_Imp_Casing_Config : External_Casing_Type;
1357 -- This is the value of the configuration switch that controls casing of
1358 -- external symbols where the external name is implicitly given. It can be
1359 -- set to Uppercase by the command line switch -gnatF, and further modified
1360 -- by the use of the configuration pragma External_Name_Casing in the
1361 -- gnat.adc file. This flag is used to set the initial value for
1362 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1363 -- however that the setting of this flag is ignored for internal and
1364 -- predefined units (which are always compiled with Lowercase mode).
1366 Persistent_BSS_Mode_Config : Boolean;
1368 -- This is the value of the configuration switch that controls whether
1369 -- potentially persistent data is to be placed in the persistent_bss
1370 -- section. It can be set True by use of the pragma Persistent_BSS.
1371 -- This flag is used to set the initial value of Persistent_BSS_Mode
1372 -- at the start of each compilation unit, except that it is always
1373 -- set False for predefined units.
1375 Polling_Required_Config : Boolean;
1377 -- This is the value of the configuration switch that controls polling
1378 -- mode. It can be set True by the command line switch -gnatP, and then
1379 -- further modified by the use of pragma Polling in the gnat.adc file. This
1380 -- flag is used to set the initial value for Polling_Required at the start
1381 -- of analyzing each unit.
1383 Use_VADS_Size_Config : Boolean;
1385 -- This is the value of the configuration switch that controls the use of
1386 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1387 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1388 -- This flag is used to set the initial value for Use_VADS_Size at the
1389 -- start of analyzing each unit. Note however that the setting of this flag
1390 -- is ignored for internal and predefined units (which are always compiled
1391 -- with the standard Size semantics).
1393 type Config_Switches_Type is private;
1394 -- Type used to save values of the switches set from Config values
1396 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1397 -- This procedure saves the current values of the switches which are
1398 -- initialized from the above Config values, and then resets these switches
1399 -- according to the Config value settings.
1401 procedure Set_Opt_Config_Switches
1402 (Internal_Unit : Boolean;
1403 Main_Unit : Boolean);
1404 -- This procedure sets the switches to the appropriate initial values. The
1405 -- parameter Internal_Unit is True for an internal or predefined unit, and
1406 -- affects the way the switches are set (see above). Main_Unit is true if
1407 -- switches are being set for the main unit (this affects setting of the
1408 -- assert/debug pragma switches, which are normally set false by default
1409 -- for an internal unit, except when the internal unit is the main unit,
1410 -- in which case we use the command line settings).
1412 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1413 -- This procedure restores a set of switch values previously saved by a
1414 -- call to Save_Opt_Switches.
1416 procedure Register_Opt_Config_Switches;
1417 -- This procedure is called after processing the gnat.adc file to record
1418 -- the values of the Config switches, as possibly modified by the use of
1419 -- command line switches and configuration pragmas.
1421 ------------------------
1422 -- Other Global Flags --
1423 ------------------------
1425 Expander_Active : Boolean := False;
1426 -- A flag that indicates if expansion is active (True) or deactivated
1427 -- (False). When expansion is deactivated all calls to expander routines
1428 -- have no effect. Note that the initial setting of False is merely to
1429 -- prevent saving of an undefined value for an initial call to the
1430 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1431 -- this flag, see package Expander. Indeed this flag might more logically
1432 -- be in the spec of Expander, but it is referenced by Errout, and it
1433 -- really seems wrong for Errout to depend on Expander.
1435 Static_Dispatch_Tables : Boolean := True;
1436 -- This flag indicates if the backend supports generation of statically
1437 -- allocated dispatch tables. If it is True, then the front end will
1438 -- generate static aggregates for dispatch tables that contain forward
1439 -- references to addresses of subprograms not seen yet, and the back end
1440 -- must be prepared to handle this case. If it is False, then the front
1441 -- end generates assignments to initialize the dispatch table, and there
1442 -- are no such forward references. By default we build statically allocated
1443 -- dispatch tables for all library level tagged types in all platforms.This
1444 -- behavior can be disabled using switch -gnatd.t which will set this flag
1445 -- to False and revert to the previous dynamic behavior.
1447 -----------------------
1448 -- Tree I/O Routines --
1449 -----------------------
1451 procedure Tree_Read;
1452 -- Reads switch settings from current tree file using Tree_Read
1454 procedure Tree_Write;
1455 -- Writes out switch settings to current tree file using Tree_Write
1457 --------------------------
1458 -- ASIS Version Control --
1459 --------------------------
1461 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1462 -- are supposed to be used in the GNAT/ASIS version check performed in
1463 -- the ASIS code (this package is also a part of the ASIS implementation).
1464 -- They are set by Tree_Read procedure, so they represent the version
1465 -- number (and the version string) of the compiler which has created the
1466 -- tree, and they are supposed to be compared with the corresponding values
1467 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1470 Tree_Version_String : String_Access;
1471 -- Used to store the compiler version string read from a tree file to check
1472 -- if it is from the same date as stored in the version string in Gnatvsn.
1473 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1474 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1475 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1476 -- of the corresponding source sets, using version strings that may be
1477 -- of different lengths.
1479 Tree_ASIS_Version_Number : Int;
1480 -- Used to store the ASIS version number read from a tree file to check if
1481 -- it is the same as stored in the ASIS version number in Tree_IO.
1485 -- The following type is used to save and restore settings of switches in
1486 -- Opt that represent the configuration (i.e. result of config pragmas).
1488 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1489 -- flag that once set does not get reset, since the whole idea of this flag
1490 -- is to record the setting for the main unit.
1492 type Config_Switches_Type is record
1493 Ada_Version : Ada_Version_Type;
1494 Ada_Version_Explicit : Ada_Version_Type;
1495 Assertions_Enabled : Boolean;
1496 Debug_Pragmas_Enabled : Boolean;
1497 Dynamic_Elaboration_Checks : Boolean;
1498 Exception_Locations_Suppressed : Boolean;
1499 Extensions_Allowed : Boolean;
1500 External_Name_Exp_Casing : External_Casing_Type;
1501 External_Name_Imp_Casing : External_Casing_Type;
1502 Persistent_BSS_Mode : Boolean;
1503 Polling_Required : Boolean;
1504 Use_VADS_Size : Boolean;
1507 -- The following declarations are for GCC version dependent flags. We do
1508 -- not let client code in the compiler test GCC_Version directly, but
1509 -- instead use deferred constants for relevant feature tags.
1511 -- Note: there currently are no such constants defined in this section,
1512 -- since the compiler front end is currently entirely independent of the
1513 -- GCC version, which is a desirable state of affairs.
1515 function get_gcc_version return Int;
1516 pragma Import (C, get_gcc_version, "get_gcc_version");
1518 GCC_Version : constant Nat := get_gcc_version;
1520 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1521 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.