1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2020, 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, etc).
37 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
38 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
39 -- driver, gnatclean, gprbuild and gprclean.
41 with Hostparm; use Hostparm;
42 with Types; use Types;
44 pragma Warnings (Off);
45 -- This package is used also by gnatcoll
46 with System.Strings; use System.Strings;
47 with System.WCh_Con; use System.WCh_Con;
52 ----------------------
53 -- Checksum Control --
54 ----------------------
56 -- Checksums are computed for sources to check for sources being the same
57 -- from a compilation point of view (e.g. spelling of identifiers and
58 -- white space layout do not count in this computation).
60 Checksum_Accumulate_Limited_Checksum : Boolean := False;
61 -- Used to control the computation of the limited view of a package.
62 -- (Not currently used, possible optimization for ALI files of units
63 -- in limited with_clauses).
65 ----------------------------------------------
66 -- Settings of Modes for Current Processing --
67 ----------------------------------------------
69 -- The following mode values represent the current state of processing.
70 -- The values set here are the default values. Unless otherwise noted,
71 -- the value may be reset in Switch-? with an appropriate switch. In
72 -- some cases, the values can also be modified by pragmas, and in the
73 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
74 -- the default values.
76 Latest_Ada_Only : Boolean := False;
77 -- If True, the only value valid for Ada_Version is Ada_Version_Type'Last,
78 -- trying to specify other values will be ignored (in case of pragma
79 -- Ada_xxx) or generate an error (in case of -gnat83/95/xx switches).
81 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012, Ada_2020);
82 pragma Ordered (Ada_Version_Type);
83 pragma Convention (C, Ada_Version_Type);
84 -- Versions of Ada for Ada_Version below. Note that these are ordered,
85 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
86 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely
87 -- what you want, because it will apply to future versions of the language.
89 -- WARNING: There is a matching C declaration of this type in fe.h
91 Ada_Version_Default : constant Ada_Version_Type := Ada_2012;
92 pragma Warnings (Off, Ada_Version_Default);
94 -- Default Ada version if no switch given. The Warnings off is to kill
95 -- constant condition warnings.
97 Ada_Version : Ada_Version_Type := Ada_Version_Default;
99 -- Current Ada version for compiler, as set by configuration pragmas,
100 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
101 -- predefined or internal file is compiled.
103 -- WARNING: There is a matching C declaration of this variable in fe.h
105 Ada_Version_Pragma : Node_Id := Empty;
106 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used
107 -- to specialize error messages complaining about the Ada version in use.
109 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
111 -- Like Ada_Version, but does not get set implicitly for predefined or
112 -- internal units, so it reflects the Ada version explicitly set using
113 -- configuration pragmas or compiler switches (or if neither appears, it
114 -- remains set to Ada_Version_Default). This is used in the rare cases
115 -- (notably pragma Obsolescent) where we want the explicit version set.
117 Ada_Version_Runtime : Ada_Version_Type := Ada_2012;
119 -- Ada version used to compile the runtime. Used to set Ada_Version (but
120 -- not Ada_Version_Explicit) when compiling predefined or internal units.
122 Ada_Final_Suffix : constant String := "final";
123 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
125 -- The name of the procedure that performs the finalization at the end of
126 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
128 Ada_Init_Suffix : constant String := "init";
129 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
131 -- The name of the procedure that performs initialization at the start
132 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
134 Ada_Main_Name_Suffix : constant String := "main";
136 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
137 -- can be referenced in a uniform manner to create either the default
138 -- value of Ada_Main_Name (declared below), or the non-default name
139 -- set by Gnatbind.Scan_Bind_Arg.
141 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
143 -- The name of the Ada package generated by the binder (when in Ada mode).
144 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
146 Address_Clause_Overlay_Warnings : Boolean := True;
148 -- Set False to disable address clause warnings. Modified by use of
151 Address_Is_Private : Boolean := False;
153 -- Set True if package System has the line "type Address is private;"
155 Aggregate_Individually_Assign : Boolean := False;
157 -- Set True if record aggregates are to be always converted into assignment
158 -- statements. Set through the corresponding pragma.
160 All_Errors_Mode : Boolean := False;
162 -- Flag set to force display of multiple errors on a single line and
163 -- also repeated error messages for references to undefined identifiers
164 -- and certain other repeated error messages. Set by use of -gnatf.
166 Allow_Integer_Address : Boolean := False;
168 -- Allow use of integer expression in a context requiring System.Address.
169 -- Set by the use of configuration pragma Allow_Integer_Address. Also set
170 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used.
172 All_Sources : Boolean := False;
174 -- Set to True to require all source files to be present. This flag is
175 -- directly modified by gnatmake to affect the shared binder routines.
177 Alternate_Main_Name : String_Ptr := null;
179 -- Set to non-null when Bind_Alternate_Main_Name is True. This value
180 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
182 Assertions_Enabled : Boolean := False;
184 -- Indicates default policy (True = Check, False = Ignore) to be applied
185 -- to all assertion aspects and pragmas, and to pragma Debug, if there is
186 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma.
187 -- Set True by use of -gnata.
189 Assume_No_Invalid_Values : Boolean := False;
190 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end
191 -- assumes that values could have invalid representations, unless it can
192 -- clearly prove that the values are valid. If this switch is set (by
193 -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values
194 -- are valid and in range of their representations. This feature is now
195 -- fully enabled in the compiler.
197 Back_Annotate_Rep_Info : Boolean := False;
199 -- If set True, enables back annotation of representation information
200 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
201 -- (list representation information). It is also set true if certain
202 -- Unchecked_Conversion instantiations require checking based on annotated
205 Back_End_Handles_Limited_Types : Boolean;
206 -- This flag is set true if the back end can properly handle limited or
207 -- other by reference types, and avoid copies. If this flag is False, then
208 -- the front end does special expansion for if/case expressions to make
209 -- sure that no copy occurs. If the flag is True, then the expansion for
210 -- if and case expressions relies on the back end properly handling things.
211 -- Currently the default is False for all cases (set in gnat1drv). The
212 -- default can be modified using -gnatd.L (sets the flag True). This is
213 -- used to test the possibility of having the backend handle this.
215 Back_End_Inlining : Boolean := False;
217 -- Set True to activate inlining by back-end expansion. This is the normal
218 -- default mode for gcc targets, so it is True on such targets unless the
219 -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the
220 -- exact conditions for setting this switch.
222 -- WARNING: There is a matching C declaration of this variable in fe.h
224 Bind_Alternate_Main_Name : Boolean := False;
226 -- True if main should be called Alternate_Main_Name.all.
227 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
229 Bind_Main_Program : Boolean := True;
231 -- Set to False if not binding main Ada program
233 Bind_For_Library : Boolean := False;
235 -- Set to True if the binder needs to generate a file designed for building
236 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
238 Bind_Only : Boolean := False;
239 -- GNATMAKE, GPRBUILD
240 -- Set to True to skip compile and link steps
241 -- (except when Compile_Only and/or Link_Only are True).
243 Blank_Deleted_Lines : Boolean := False;
245 -- Output empty lines for each line of preprocessed input that is deleted
246 -- in the output, including preprocessor lines starting with a '#'.
248 Brief_Output : Boolean := False;
250 -- Force brief error messages to standard error, even if verbose mode is
251 -- set (so that main error messages go to standard output).
253 Build_Bind_And_Link_Full_Project : Boolean := False;
255 -- Set to True to build, bind and link all the sources of a project file
258 Check_Aliasing_Of_Parameters : Boolean := False;
260 -- Set to True to detect whether subprogram parameters and function results
261 -- alias the same object(s).
263 Check_Float_Overflow : Boolean := False;
265 -- Set to True to check that operations on predefined unconstrained float
266 -- types (e.g. Float, Long_Float) do not overflow and generate infinities
267 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use
268 -- of the -gnateF switch.
270 Check_Object_Consistency : Boolean := False;
271 -- GNATBIND, GNATMAKE
272 -- Set to True to check whether every object file is consistent with its
273 -- corresponding ada library information (ALI) file. An object file is
274 -- inconsistent with the corresponding ALI file if the object file does
275 -- not exist or if it has an older time stamp than the ALI file. Default
276 -- above is for GNATBIND. GNATMAKE overrides this default to True (see
277 -- Make.Initialize) since we normally do need to check source consistencies
280 Check_Only : Boolean := False;
282 -- Set to True to do checks only, no output of binder file
284 Check_Policy_List : Node_Id := Empty;
286 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
287 -- that are linked through the Next_Pragma fields, with the list being
288 -- terminated by Empty. The order is most recently processed first. Note
289 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
290 -- of this variable, implementing the required scope control for pragmas
291 -- appearing in a declarative part.
293 Check_Readonly_Files : Boolean := False;
295 -- Set to True to check readonly files during the make process
297 Check_Source_Files : Boolean := True;
298 -- GNATBIND, GNATMAKE
299 -- Set to True to enable consistency checking for any source files that
300 -- are present (i.e. date must match the date in the library info file).
301 -- Set to False for object file consistency check only. This flag is
302 -- directly modified by gnatmake, to affect the shared binder routines.
304 Check_Switches : Boolean := False;
306 -- Set to True to check compiler options during the make process
308 Check_Unreferenced : Boolean := False;
310 -- Set to True to enable checking for unreferenced entities other
311 -- than formal parameters (for which see Check_Unreferenced_Formals)
312 -- Modified by use of -gnatwu/U.
314 Check_Unreferenced_Formals : Boolean := False;
316 -- Set to True to check for unreferenced formals. This is turned on by
317 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
319 Check_Validity_Of_Parameters : Boolean := False;
321 -- Set to True to check for proper scalar initialization of subprogram
322 -- parameters on both entry and exit. This is turned on by -gnateV.
324 Check_Withs : Boolean := False;
326 -- Set to True to enable checking for unused withs, and also the case
327 -- of withing a package and using none of the entities in the package.
328 -- Modified by use of -gnatwu/U.
330 CodePeer_Mode : Boolean := False;
331 -- GNAT, GNATBIND, GPRBUILD
332 -- Enable full CodePeer mode (SCIL generation, disable switches that
333 -- interact badly with it, etc...). This is turned on by -gnatC.
335 Commands_To_Stdout : Boolean := False;
337 -- True if echoed commands to be written to stdout instead of stderr
339 Comment_Deleted_Lines : Boolean := False;
341 -- True if source lines removed by the preprocessor should be commented
342 -- in the output file.
344 Compilation_Time : String (1 .. 19);
346 -- Compilation date and time in form YYYY-MM-DD HH:MM:SS
348 Compile_Only : Boolean := False;
349 -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN
350 -- GNATMAKE, GPRBUILD:
351 -- set True to skip bind and link steps (except when Bind_Only is True)
352 -- GNATCLEAN, GPRCLEAN:
353 -- set True to delete only the files produced by the compiler but not the
354 -- library files or the executable files.
356 Compiler_Unit : Boolean := False;
358 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the
359 -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays
360 -- True, since any units that are with'ed directly or indirectly by
361 -- a Compiler_Unit_Warning main unit are subject to the same restrictions.
362 -- Such units really should have their own pragmas, but we do not bother to
363 -- check for that, so this transitivity provides extra checking.
365 Config_File : Boolean := True;
367 -- Set to False to inhibit reading and processing of gnat.adc file
369 Config_File_Names : String_List_Access := null;
371 -- Names of configuration pragmas files (given by switches -gnatec)
373 Configurable_Run_Time_Mode : Boolean := False;
375 -- Set True if the compiler is operating in configurable run-time mode.
376 -- This happens if the flag Targparm.Configurable_Run_Time_On_Target is
377 -- True, or if pragma No_Run_Time is used. See the spec of Rtsfind for
378 -- details on the handling of the latter pragma.
380 Constant_Condition_Warnings : Boolean := False;
382 -- Set to True to activate warnings on constant conditions. Modified by
385 Create_Mapping_File : Boolean := False;
387 -- Set to True (-C switch) to indicate that the compiler will be invoked
388 -- with a mapping file (-gnatem compiler switch).
390 subtype Debug_Level_Value is Nat range 0 .. 3;
391 Debugger_Level : Debug_Level_Value := 0;
393 -- The value given to the -g parameter. The default value for -g with
394 -- no value is 2. If no -g is specified, defaults to 0.
395 -- Note that the generated code should never depend on this variable,
396 -- since we want debug info to be nonintrusive on the generate code.
398 Default_Exit_Status : Int := 0;
400 -- Set the default exit status value. Set by the -Xnnn switch for the
403 Debug_Generated_Code : Boolean := False;
405 -- Set True (-gnatD switch) to debug generated expanded code instead
406 -- of the original source code. Causes debugging information to be
407 -- written with respect to the generated code file that is written.
409 -- WARNING: There is a matching C declaration of this variable in fe.h
411 Default_Pool : Node_Id := Empty;
413 -- Used to record the storage pool name (or null literal) that is the
414 -- argument of an applicable pragma Default_Storage_Pool.
415 -- Empty: No pragma Default_Storage_Pool applies.
416 -- N_Null node: "pragma Default_Storage_Pool (null);" applies.
417 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and
418 -- this points to the name X.
419 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value.
421 No_Stack_Size : constant := -1;
423 Default_Stack_Size : Int := No_Stack_Size;
425 -- Set to default primary stack size in units of bytes. Set by the -dnnn
426 -- switch for the binder. A value of No_Stack_Size indicates that
427 -- no default was set by the binder.
429 Default_Sec_Stack_Size : Int := No_Stack_Size;
431 -- Set to default secondary stack size in units of bytes. Set by the -Dnnn
432 -- switch for the binder. A value of No_Stack_Size indicates that no
433 -- default was set by the binder and the run-time value should be used
436 Default_SSO : Character := ' ';
438 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value
439 -- of ' ' indicates that no default has been set, otherwise the value is
440 -- either 'H' for High_Order_First or 'L' for Lower_Order_First.
442 Detect_Blocking : Boolean := False;
444 -- Set True to force the run time to raise Program_Error if calls to
445 -- potentially blocking operations are detected from protected actions.
447 Directories_Must_Exist_In_Projects : Boolean := True;
449 -- Set to False with switch -f of gnatclean and gprclean
451 Disable_FE_Inline : Boolean := False;
453 -- Request to disable front end inlining from pragma Inline in the
454 -- presence of the -fno-inline back end flag on the command line,
455 -- regardless of any other switches that are set.
456 -- It remains the back end's reponsibility to honor -fno-inline at the
459 Display_Compilation_Progress : Boolean := False;
460 -- GNATMAKE, GPRBUILD
461 -- Set True (-d switch) to display information on progress while compiling
462 -- files. Internal flag to be used in conjunction with an IDE
463 -- (e.g GNAT Studio).
465 type Distribution_Stub_Mode_Type is
468 -- Normal mode, no generation of distribution stubs
470 Generate_Receiver_Stub_Body,
471 -- The unit being compiled is the RCI body, and the compiler will
472 -- generate the body for the receiver stubs and compile it.
474 Generate_Caller_Stub_Body);
475 -- The unit being compiled is the RCI spec, and the compiler will
476 -- generate the body for the caller stubs and compile it.
478 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
480 -- This enumeration variable indicates the three states of distribution
481 -- annex stub generation.
483 Do_Not_Execute : Boolean := False;
485 -- Set to True if no actual compilations should be undertaken
487 Dump_Source_Text : Boolean := False;
489 -- Set to True (by -gnatL) to dump source text intermingled with generated
490 -- code. Effective only if either of Debug/Print_Generated_Code is true.
492 Dynamic_Elaboration_Checks : Boolean := False;
494 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
495 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
497 Dynamic_Stack_Measurement : Boolean := False;
499 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
501 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
503 -- Number of measurements we want to store during dynamic stack analysis.
504 -- When the buffer is full, non-storable results will be output on the fly.
505 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
506 -- by processing of -u flag for gnatbind.
508 Elab_Dependency_Output : Boolean := False;
510 -- Set to True to output complete list of elaboration constraints
512 Elab_Order_Output : Boolean := False;
514 -- Set to True to output chosen elaboration order
516 Elab_Info_Messages : Boolean := False;
518 -- Set to True to output info messages for static elabmodel (-gnatel)
520 Elab_Warnings : Boolean := True;
522 -- Set to True to generate elaboration warnings (-gnatwl). The warnings are
523 -- enabled by default because they carry the same importance as errors. The
524 -- compiler cannot emit actual errors because elaboration diagnostics need
525 -- dataflow analysis, which is not available. This behavior parallels that
526 -- of the old ABE mechanism.
528 Error_Msg_Line_Length : Nat := 0;
530 -- Records the error message line length limit. If this is set to zero,
531 -- then we get the old style behavior, in which each call to the error
532 -- message routines generates one line of output as a separate message.
533 -- If it is set to a non-zero value, then continuation lines are folded
534 -- to make a single long message, and then this message is split up into
535 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
537 Error_To_Warning : Boolean := False;
539 -- If True, then certain error messages (e.g. parameter overlap messages
540 -- for procedure calls in Ada 2012 mode) are treated as warnings instead
541 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning
542 -- will identify affected messages.
544 Exception_Handler_Encountered : Boolean := False;
546 -- This flag is set true if the parser encounters an exception handler.
547 -- It is used to set Warn_On_Exception_Propagation True if the restriction
548 -- No_Exception_Propagation is set.
550 Exception_Extra_Info : Boolean := False;
552 -- True when switch -gnateE is used. When True, generate extra information
553 -- associated with exception messages (in particular range and index
556 -- WARNING: There is a matching C declaration of this variable in fe.h
558 Exception_Locations_Suppressed : Boolean := False;
560 -- Set to True if a Suppress_Exception_Locations configuration pragma is
563 -- WARNING: There is a matching C declaration of this variable in fe.h
565 type Exception_Mechanism_Type is
566 -- Determines the kind of mechanism used to handle exceptions
569 -- Exceptions use setjmp/longjmp generated explicitly by the front end
570 -- (this includes gigi or other equivalent parts of the code generator).
571 -- AT END handlers are converted into exception handlers by the front
575 -- Exceptions are handled by the back end. The front end simply
576 -- generates the handlers as they appear in the source, and AT END
577 -- handlers are left untouched (they are not converted into exception
578 -- handlers when operating in this mode). Propagation is performed
579 -- using a frame unwinding scheme and requires no particular setup code
580 -- at handler sites on regular execution paths.
583 -- Similar to Back_End_ZCX with respect to the front-end processing
584 -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to
585 -- propagate and setup handler contexts on regular execution paths.
586 pragma Convention (C, Exception_Mechanism_Type);
588 -- WARNING: There is a matching C declaration of this type in fe.h
590 Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ;
592 -- Set to the appropriate value depending on the flags in system.ads
593 -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to
594 -- allow access by gigi.
596 -- WARNING: There is a matching C declaration of this variable in fe.h
598 function Back_End_Exceptions return Boolean;
599 function Front_End_Exceptions return Boolean;
600 function ZCX_Exceptions return Boolean;
601 function SJLJ_Exceptions return Boolean;
603 -- Various properties of the active Exception_Mechanism
605 -- WARNING: There is a matching C declaration of these subprograms in fe.h
607 Exception_Tracebacks : Boolean := False;
609 -- Set to True to store tracebacks in exception occurrences (-Ea or -E)
611 Exception_Tracebacks_Symbolic : Boolean := False;
613 -- Set to True to store tracebacks in exception occurrences and enable
614 -- symbolic tracebacks (-Es).
616 Expand_Nonbinary_Modular_Ops : Boolean := False;
617 -- Set to True to convert nonbinary modular additions into code
618 -- that relies on the front-end expansion of operator Mod.
620 Extensions_Allowed : Boolean := False;
622 -- Set to True by switch -gnatX if GNAT specific language extensions
623 -- are allowed. Currently there are no such defined extensions.
625 type External_Casing_Type is (
626 As_Is, -- External names cased as they appear in the Ada source
627 Uppercase, -- External names forced to all uppercase letters
628 Lowercase); -- External names forced to all lowercase letters
630 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
632 -- The setting of this flag determines the casing of external names
633 -- when the name is implicitly derived from an entity name (i.e. either
634 -- no explicit External_Name or Link_Name argument is used, or, in the
635 -- case of extended DEC pragmas, the external name is given using an
636 -- identifier. The As_Is setting is not permitted here (since this would
637 -- create Ada source programs that were case sensitive).
639 External_Name_Exp_Casing : External_Casing_Type := As_Is;
641 -- The setting of this flag determines the casing of an external name
642 -- specified explicitly with a string literal. As_Is means the string
643 -- literal is used as given with no modification to the casing. If
644 -- Lowercase or Uppercase is set, then the string is forced to all
645 -- lowercase or all uppercase letters as appropriate. Note that this
646 -- setting has no effect if the external name is given using an identifier
647 -- in the case of extended DEC import/export pragmas (in this case the
648 -- casing is controlled by External_Name_Imp_Casing), and also has no
649 -- effect if an explicit Link_Name is supplied (a link name is always
650 -- used exactly as given).
652 External_Unit_Compilation_Allowed : Boolean := False;
654 -- When True (set by gnatmake switch -x), allow compilation of sources
655 -- that are not part of any project file.
657 Fast_Math : Boolean := False;
659 -- Indicates the current setting of Fast_Math mode, as set by the use
660 -- of a Fast_Math pragma (set True by Fast_Math (On)).
662 Force_ALI_File : Boolean := False;
664 -- Force generation of ALI file even if errors are encountered.
665 -- Set on by use of -gnatQ.
667 Disable_ALI_File : Boolean := False;
669 -- Disable generation of ALI file
671 Follow_Links_For_Files : Boolean := False;
673 -- Set to True (-eL) to process the project files in trusted mode. If
674 -- Follow_Links is False, it is assumed that the project doesn't contain
675 -- any file duplicated through symbolic links (although the latter are
676 -- still valid if they point to a file which is outside of the project),
677 -- and that no directory has a name which is a valid source name.
679 Follow_Links_For_Dirs : Boolean := False;
681 -- Set to True if directories can be links in this project, and therefore
682 -- additional system calls must be performed to ensure that we always see
683 -- the same full name for each directory.
685 Force_Checking_Of_Elaboration_Flags : Boolean := False;
687 -- True if binding with forced checking of the elaboration flags
690 Force_Compilations : Boolean := False;
691 -- GNATMAKE, GPRBUILD
692 -- Set to force recompilations even when the objects are up-to-date.
694 Force_Elab_Order_File : String_Ptr := null;
696 -- File name specified for -f switch (the forced elaboration order file)
698 Front_End_Inlining : Boolean := False;
700 -- Set True to activate inlining by front-end expansion (even on GCC
701 -- targets, where inlining is normally handled by the back end). Set by
702 -- the flag -gnatN (which is now considered obsolescent, since the GCC
703 -- back end can do a better job of inlining than the front end these days).
705 Full_Path_Name_For_Brief_Errors : Boolean := False;
707 -- When True, in Brief_Output mode, each error message line will start with
708 -- the full path name of the source. When False, only the file name without
709 -- directory information is used.
711 Full_List : Boolean := False;
713 -- Set True to generate full source listing with embedded errors
715 Full_List_File_Name : String_Ptr := null;
717 -- Set to file name to generate full source listing to named file (or if
718 -- the name is of the form .xxx, then to name.xxx where name is the source
719 -- file name with extension stripped.
721 Generate_C_Code : Boolean := False;
723 -- If True, the Cprint circuitry to generate C code output is activated.
724 -- Set True by use of -gnateg or -gnatd.V for GNAT, and -G for GNATBIND.
726 Generate_CodePeer_Messages : Boolean := False;
728 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is
729 -- turned on by -gnateC.
731 Generate_Processed_File : Boolean := False;
733 -- True when switch -gnateG is used. When True, create in a file
734 -- <source>.prep, if the source is preprocessed.
736 Generate_SCIL : Boolean := False;
738 -- Set True to activate SCIL code generation.
740 Generate_SCO : Boolean := False;
742 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source
743 -- Coverage Obligation (SCO) information is generated and output in the ALI
744 -- file. See unit Par_SCO for full details.
746 Generate_SCO_Instance_Table : Boolean := False;
748 -- True when switch -fdump-scos is used. When True, a table of instances is
751 -- WARNING: There is a matching C declaration of this variable in fe.h
753 Generating_Code : Boolean := False;
755 -- True if the frontend finished its work and has called the backend to
756 -- process the tree and generate the object file.
758 type Ghost_Mode_Type is (None, Check, Ignore);
759 -- Possible legal modes that can be set by aspect/pragma Ghost as well as
760 -- value None, which indicates that no such aspect/pragma applies.
762 Ghost_Mode : Ghost_Mode_Type := None;
764 -- The current Ghost mode in effect
766 Global_Discard_Names : Boolean := False;
768 -- True if a pragma Discard_Names appeared as a configuration pragma for
769 -- the current compilation unit.
771 GNAT_Encodings : Int;
772 pragma Import (C, GNAT_Encodings, "gnat_encodings");
773 -- Constant controlling the balance between GNAT encodings and standard
774 -- DWARF to emit in the debug information. It accepts the following values.
776 DWARF_GNAT_Encodings_All : constant Int := 0;
777 DWARF_GNAT_Encodings_GDB : constant Int := 1;
778 DWARF_GNAT_Encodings_Minimal : constant Int := 2;
780 Identifier_Character_Set : Character;
782 -- This variable indicates the character set to be used for identifiers.
783 -- The possible settings are:
784 -- '1' Latin-1 (ISO-8859-1)
785 -- '2' Latin-2 (ISO-8859-2)
786 -- '3' Latin-3 (ISO-8859-3)
787 -- '4' Latin-4 (ISO-8859-4)
788 -- '5' Latin-Cyrillic (ISO-8859-5)
789 -- '9' Latin-9 (ISO-8859-15)
790 -- 'p' PC (US, IBM page 437)
791 -- '8' PC (European, IBM page 850)
792 -- 'f' Full upper set (all distinct)
793 -- 'n' No upper characters (Ada 83 rules)
794 -- 'w' Latin-1 plus wide characters allowed in identifiers
796 -- The setting affects the set of letters allowed in identifiers and the
797 -- upper/lower case equivalences. It does not affect the interpretation of
798 -- character and string literals, which are always stored using the actual
799 -- coding in the source program. This variable is initialized to the
800 -- default value appropriate to the system (in Osint.Initialize), and then
801 -- reset if a command line switch is used to change the setting.
803 Ignore_Rep_Clauses : Boolean := False;
805 -- Set True to ignore all representation clauses. Useful when compiling
806 -- code from foreign compilers for checking purposes. Can be
807 -- set True by use of -gnatI.
809 Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False;
811 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when
812 -- the pragma appears inside an instance whose enclosing context is subject
813 -- to SPARK_Mode "off". This property applies to nested instances.
815 Ignore_Style_Checks_Pragmas : Boolean := False;
817 -- Set True to ignore all Style_Checks pragmas. Can be set True by use
820 Ignore_Unrecognized_VWY_Switches : Boolean := False;
822 -- Set True to ignore unrecognized y, V, w switches. Can be set True by
823 -- use of -gnateu, causing subsequent unrecognized switches to result in
824 -- a warning rather than an error.
826 Ignored_Ghost_Region : Node_Id := Empty;
828 -- The start of the current ignored Ghost region. This value must always
829 -- reflect the starting node of the outermost ignored Ghost region. If a
830 -- nested ignored Ghost region is entered, the value must remain unchanged.
832 Implementation_Unit_Warnings : Boolean := True;
834 -- Set True to active warnings for use of implementation internal units.
835 -- Modified by use of -gnatwi/-gnatwI.
837 Implicit_Packing : Boolean := False;
839 -- If set True, then a Size attribute clause on an array is allowed to
840 -- cause implicit packing instead of generating an error message. Set by
841 -- use of pragma Implicit_Packing.
843 Include_Subprogram_In_Messages : Boolean := False;
845 -- Set True to include the enclosing subprogram in compiler messages.
847 Ineffective_Inline_Warnings : Boolean := False;
849 -- Set True to activate warnings if front-end inlining (-gnatN) is not able
850 -- to actually inline a particular call (or all calls). Can be controlled
851 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if
852 -- frontend inlining is not able to inline a subprogram expected to
853 -- be inlined in GNATprove mode.
855 Init_Or_Norm_Scalars : Boolean := False;
857 -- Set True if a pragma Initialize_Scalars applies to the current unit.
858 -- Also set True if a pragma Restriction (Normalize_Scalars) applies.
860 Initialize_Scalars : Boolean := False;
862 -- Set True if a pragma Initialize_Scalars applies to the current unit.
863 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
865 Initialize_Scalars_Mode1 : Character := 'I';
866 Initialize_Scalars_Mode2 : Character := 'N';
868 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
869 -- is IN (invalid values), used if no -S switch is used.
871 Inline_Active : Boolean := False;
873 -- Set True to activate pragma Inline processing across modules. Default
874 -- for now is not to inline across module boundaries.
876 Inline_Level : Nat := 0;
878 -- Set to indicate the inlining level: 0 means that an appropriate value is
879 -- to be computed by the compiler based on the optimization level (-gnatn),
880 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full
881 -- inlining across modules (-gnatn2).
883 Interface_Library_Unit : Boolean := False;
885 -- Set to True to indicate that at least one ALI file is an interface ALI:
886 -- then elaboration flag checks are to be generated in the binder
889 Invalid_Value_Used : Boolean := False;
891 -- Set True if a valid Invalid_Value attribute is encountered
893 Inline_Processing_Required : Boolean := False;
895 -- Set True if inline processing is required. Inline processing is required
896 -- if an active Inline pragma is processed. The flag is set for a pragma
897 -- Inline or Inline_Always that is actually active.
899 In_Place_Mode : Boolean := False;
901 -- Set True to store ALI and object files in place i.e. in the object
902 -- directory if these files already exist or in the source directory
905 Keep_Going : Boolean := False;
906 -- GNATMAKE, GPRBUILD
907 -- When True signals to ignore compilation errors and keep processing
908 -- sources until there is no more work.
910 Keep_Temporary_Files : Boolean := False;
911 -- GNATCMD, GNATMAKE, GPRBUILD
912 -- When True the temporary files are not deleted. Set by switches -dn or
913 -- --keep-temp-files.
915 Leap_Seconds_Support : Boolean := False;
917 -- Set to True to enable leap seconds support in Ada.Calendar and its
920 Legacy_Elaboration_Checks : Boolean := False;
922 -- Set to True when the pre-18.x access-before-elaboration model is to be
923 -- used. Modified by use of -gnatH.
925 Legacy_Elaboration_Order : Boolean := False;
927 -- Set to True when the pre-20.x elaboration-order model is to be used.
928 -- Modified by use of -H.
930 Link_Only : Boolean := False;
931 -- GNATMAKE, GPRBUILD
932 -- Set to True to skip compile and bind steps (except when Bind_Only is
935 List_Body_Required_Info : Boolean := False;
937 -- List info messages about why a package requires a body. Modified by use
940 List_Inherited_Aspects : Boolean := False;
942 -- List inherited invariants, preconditions, and postconditions from
943 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited
944 -- subtype predicates. Modified by use of -gnatw.l/.L.
946 List_Restrictions : Boolean := False;
948 -- Set to True to list restrictions pragmas that could apply to partition
950 List_Units : Boolean := False;
952 -- List units in the active library for a compilation (-gnatu switch)
954 List_Closure : Boolean := False;
956 -- List all sources in the closure of a main (-R or -Ra gnatbind switch)
958 List_Closure_All : Boolean := False;
960 -- List all sources in closure of main including run-time units (-Ra
963 List_Dependencies : Boolean := False;
965 -- When True gnatmake verifies that the objects are up to date and outputs
966 -- the list of object dependencies (-M switch). Output depends if -a switch
967 -- is used or not. This list can be used directly in a Makefile.
969 List_Representation_Info : Int range 0 .. 4 := 0;
971 -- Set non-zero by -gnatR switch to list representation information.
972 -- The settings are as follows:
974 -- 0 = no listing of representation information (default as above)
975 -- 1 = list rep info for user-defined record and array types
976 -- 2 = list rep info for all user-defined types and objects
977 -- 3 = like 2, but variable fields are decoded symbolically
978 -- 4 = like 3, but list rep info for relevant compiler-generated types
980 -- WARNING: There is a matching C declaration of this variable in fe.h
982 List_Representation_Info_To_File : Boolean := False;
984 -- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m to be
985 -- written to file.rep (where file is the name of the source file) instead
986 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
987 -- representation info is written to x.adb.ref.
989 List_Representation_Info_To_JSON : Boolean := False;
991 -- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be
992 -- output in the JSON data interchange format.
994 List_Representation_Info_Mechanisms : Boolean := False;
996 -- Set true by -gnatRm switch. Causes information on mechanisms to be
997 -- included in the representation output information.
999 List_Representation_Info_Extended : Boolean := False;
1001 -- Set true by -gnatRe switch. Causes extended information for record types
1002 -- to be included in the representation output information.
1004 List_Preprocessing_Symbols : Boolean := False;
1006 -- Set to True if symbols for preprocessing a source are to be listed
1007 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
1008 -- -s in preprocessing data file for the compiler.
1010 type Create_Repinfo_File_Proc is access procedure (Src : String);
1011 type Write_Repinfo_Line_Proc is access procedure (Info : String);
1012 type Close_Repinfo_File_Proc is access procedure;
1013 -- Types used for procedure addresses below
1015 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
1016 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
1017 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
1019 -- These three locations are left null when operating in non-compiler (e.g.
1020 -- ASIS mode), but when operating in compiler mode, they are set to point
1021 -- to the three corresponding procedures in Osint-C. The reason for this
1022 -- slightly strange interface is to stop Repinfo from dragging in Osint in
1023 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
1024 -- ??? Revisit this now that ASIS mode is gone.
1026 type Create_List_File_Proc is access procedure (S : String);
1027 type Write_List_Info_Proc is access procedure (S : String);
1028 type Close_List_File_Proc is access procedure;
1029 -- Types used for procedure addresses below
1031 Create_List_File_Access : Create_List_File_Proc := null;
1032 Write_List_Info_Access : Write_List_Info_Proc := null;
1033 Close_List_File_Access : Close_List_File_Proc := null;
1035 -- These three locations are left null when operating in non-compiler
1036 -- (e.g. from the binder), but when operating in compiler mode, they are
1037 -- set to point to the three corresponding procedures in Osint-C. The
1038 -- reason for this slightly strange interface is to prevent Repinfo
1039 -- from dragging in Osint-C in the binder, which would include unwanted
1040 -- units in the binder.
1042 Locking_Policy : Character := ' ';
1045 -- Set to ' ' for the default case (no locking policy specified). Otherwise
1046 -- set based on the pragma Locking_Policy:
1047 -- Ceiling_Locking: 'C'
1048 -- Concurrent_Readers_Locking: 'R'
1049 -- Inheritance_Locking: 'I'
1051 Locking_Policy_Sloc : Source_Ptr := No_Location;
1053 -- Remember location of previous Locking_Policy pragma. This is used for
1054 -- inconsistency error messages. A value of System_Location is used if the
1055 -- policy is set in package System.
1057 Look_In_Primary_Dir : Boolean := True;
1058 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
1059 -- Set to False if a -I- was present on the command line. When True we are
1060 -- allowed to look in the primary directory to locate other source or
1063 Make_Steps : Boolean := False;
1065 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
1068 Main_Index : Int := 0;
1070 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
1071 -- the main program is the nnn unit in a multi-unit source file.
1073 Mapping_File_Name : String_Ptr := null;
1075 -- File name of mapping between unit names, file names and path names.
1076 -- (given by switch -gnatem)
1078 Maximum_Messages : Int := 9999;
1080 -- Maximum default number of errors before compilation is terminated, or in
1081 -- the case of GNAT, maximum number of warnings before further warnings are
1082 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
1084 Maximum_File_Name_Length : Int;
1086 -- Maximum number of characters allowed in a file name, not counting the
1087 -- extension, as set by the appropriate switch. If no switch is given,
1088 -- then this value is initialized by Osint to the appropriate value.
1090 Maximum_Instantiations : Int := 8000;
1092 -- Maximum number of instantiations permitted (to stop runaway cases
1093 -- of nested instantiations). These situations probably only occur in
1094 -- specially concocted test cases. Can be modified by -gnateinn switch.
1096 Maximum_Processes : Positive := 1;
1097 -- GNATMAKE, GPRBUILD
1098 -- Maximum number of processes that should be spawned to carry out
1101 Minimal_Binder : Boolean := False;
1103 -- Set to True to suppress the generation of objects by the binder that
1104 -- are not strictly required for a program to run. Intended for ZFP
1105 -- applications that have tight memory constraints.
1107 Minimal_Recompilation : Boolean := False;
1109 -- Set to True if minimal recompilation mode requested
1111 Minimize_Expression_With_Actions : Boolean := False;
1113 -- If True, minimize the use of N_Expression_With_Actions node.
1114 -- This can be used in particular on some back-ends where this node is
1115 -- difficult to support.
1117 Modify_Tree_For_C : Boolean := False;
1119 -- If this switch is set True (currently it is set only by -gnatd.V), then
1120 -- certain meaning-preserving transformations are applied to the tree to
1121 -- make it easier to interface with back ends that implement C semantics.
1122 -- There is a section in Sinfo which describes the transformations made.
1124 Multiple_Unit_Index : Int := 0;
1126 -- This is set non-zero if the current unit is being compiled in multiple
1127 -- unit per file mode, meaning that the current unit is selected from the
1128 -- sequence of units in the current source file, using the value stored
1129 -- in this variable (e.g. 2 = select second unit in file). A value of
1130 -- zero indicates that we are in normal (one unit per file) mode.
1132 No_Backup : Boolean := False;
1134 -- Do not create backup copies of project files. Set by switch --no-backup.
1136 No_Component_Reordering : Boolean := False;
1138 -- Set True if pragma No_Component_Reordering with no parameter encountered
1140 No_Deletion : Boolean := False;
1142 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies
1143 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all
1144 -- branches of #if constructs.
1146 No_Elab_Code_All_Pragma : Node_Id := Empty;
1147 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered
1148 -- in the spec of the extended main unit. Used to determine if we need to
1149 -- do special tests for violation of this aspect.
1151 No_Heap_Finalization_Pragma : Node_Id := Empty;
1153 -- Set to point to a No_Heap_Finalization pragma defined in a configuration
1156 No_Main_Subprogram : Boolean := False;
1157 -- GNATMAKE, GNATBIND
1158 -- Set to True if compilation/binding of a program without main
1159 -- subprogram requested.
1161 No_Run_Time_Mode : Boolean := False;
1163 -- This flag is set True if a No_Run_Time pragma is encountered. See spec
1164 -- of Rtsfind for a full description of handling of this pragma.
1166 No_Split_Units : Boolean := False;
1168 -- Set to True with switch --no-split-units. When True, unit sources, spec,
1169 -- body and subunits, must all be in the same project. This is checked
1170 -- after each compilation.
1172 No_Stdinc : Boolean := False;
1173 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
1174 -- Set to True if no default source search dirs added to search list.
1176 No_Stdlib : Boolean := False;
1177 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
1178 -- Set to True if no default library search dirs added to search list.
1180 No_Strict_Aliasing : Boolean := False;
1182 -- Set True if pragma No_Strict_Aliasing with no parameters encountered.
1184 -- WARNING: There is a matching C declaration of this variable in fe.h
1186 No_Tagged_Streams : Node_Id := Empty;
1188 -- If a pragma No_Tagged_Streams is active for the current scope, this
1189 -- points to the corresponding pragma.
1191 Normalize_Scalars : Boolean := False;
1193 -- Set True if a pragma Normalize_Scalars applies to the current unit.
1194 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
1196 Object_Directory_Present : Boolean := False;
1198 -- Set to True when an object directory is specified with option -D
1200 Object_Path_File_Name : String_Ptr := null;
1202 -- Path of the temporary file that contains a list of object directories
1203 -- passed by -gnateO=<obj_path_file>.
1205 One_Compilation_Per_Obj_Dir : Boolean := False;
1206 -- GNATMAKE, GPRBUILD
1207 -- Set to True with switch --single-compile-per-obj-dir. When True, there
1208 -- cannot be simultaneous compilations with the object files in the same
1209 -- object directory, if project files are used.
1211 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
1212 pragma Ordered (Operating_Mode_Type);
1213 Operating_Mode : Operating_Mode_Type := Generate_Code;
1215 -- Indicates the operating mode of the compiler. The default is generate
1216 -- code, which runs the parser, semantics and backend. Switches can be
1217 -- used to set syntax checking only mode, or syntax and semantics checking
1218 -- only mode. Operating_Mode can also be modified as a result of detecting
1219 -- errors during the compilation process. In particular if any serious
1220 -- error is detected then this flag is reset from Generate_Code to
1221 -- Check_Semantics after generating an error message. This is an ordered
1222 -- type with the semantics that each value does more than the previous one.
1224 Optimize_Alignment : Character := 'O';
1226 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
1227 -- be modified by use of pragma Optimize_Alignment.
1229 Optimize_Alignment_Local : Boolean := False;
1231 -- Set True if Optimize_Alignment mode is set by a local configuration
1232 -- pragma that overrides the gnat.adc (or other configuration file) default
1233 -- so that the unit is not dependent on the default setting. Also always
1234 -- set True for internal units, since these always have a default setting
1235 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
1236 -- them all having such an explicit pragma in each unit).
1238 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
1240 -- Indicates the original operating mode of the compiler as set by compiler
1241 -- options. This is identical to Operating_Mode except that this is not
1242 -- affected by errors.
1244 Optimization_Level : Int;
1245 pragma Import (C, Optimization_Level, "optimize");
1247 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
1249 Optimize_Size : Int;
1250 pragma Import (C, Optimize_Size, "optimize_size");
1252 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
1253 -- in -Os mode and set to zero otherwise.
1255 Output_File_Name_Present : Boolean := False;
1256 -- GNATBIND, GNAT, GNATMAKE
1257 -- Set to True when the output C file name is given with option -o for
1258 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
1259 -- or when the executable is given with option -o for GNATMAKE.
1261 Output_Linker_Option_List : Boolean := False;
1263 -- True if output of list of linker options is requested (-K switch set)
1265 Output_ALI_List : Boolean := False;
1266 ALI_List_Filename : String_Ptr;
1268 -- True if output of list of ALIs is requested (-A switch set). List is
1269 -- output under the given filename, or standard output if not specified.
1271 Output_Object_List : Boolean := False;
1272 Object_List_Filename : String_Ptr;
1274 -- True if output of list of objects is requested (-O switch set). List is
1275 -- output under the given filename, or standard output if not specified.
1277 Partition_Elaboration_Policy : Character := ' ';
1279 -- Set to ' ' for the default case (no elaboration policy specified). Reset
1280 -- to first character (uppercase) of locking policy name if a valid pragma
1281 -- Partition_Elaboration_Policy is encountered.
1283 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location;
1285 -- Remember location of previous Partition_Elaboration_Policy pragma. This
1286 -- is used for inconsistency error messages. A value of System_Location is
1287 -- used if the policy is set in package System.
1289 Persistent_BSS_Mode : Boolean := False;
1291 -- True if a Persistent_BSS configuration pragma is in effect, causing
1292 -- potentially persistent data to be placed in the persistent_bss section.
1294 Pessimistic_Elab_Order : Boolean := False;
1296 -- True if pessimistic elaboration order is to be chosen (-p switch set)
1298 Polling_Required : Boolean := False;
1300 -- Set to True if polling for asynchronous abort is enabled by using
1301 -- the -gnatP option for GNAT.
1303 Prefix_Exception_Messages : Boolean := False;
1305 -- Set True to prefix exception messages with entity-name:
1307 Preprocessing_Data_File : String_Ptr := null;
1309 -- Set by switch -gnatep=. The file name of the preprocessing data file.
1311 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4);
1312 -- An extensible array to temporarily stores symbol definitions specified
1313 -- on the command line with -gnateD switches. The value 4 is an arbitrary
1314 -- starting point, if more space is needed it is allocated as required.
1316 Preprocessing_Symbol_Last : Natural := 0;
1317 -- Index of last symbol definition in array Symbol_Definitions
1319 Print_Generated_Code : Boolean := False;
1321 -- Set to True to enable output of generated code in source form. This
1322 -- flag is set by the -gnatG switch.
1324 Print_Standard : Boolean := False;
1326 -- Set to true to enable printing of package standard in source form.
1327 -- This flag is set by the -gnatS switch
1329 type Usage is (Unknown, Not_In_Use, In_Use);
1330 Project_File_In_Use : Usage := Unknown;
1332 -- Indicates if a project file is used or not. Set to In_Use by the first
1335 Quantity_Of_Default_Size_Sec_Stacks : Int := -1;
1337 -- The number of default sized secondary stacks that the binder should
1338 -- generate. Allows ZFP users to have the binder generate extra stacks if
1339 -- needed to support multithreaded applications. A value of -1 indicates
1340 -- that no size was set by the binder.
1342 Queuing_Policy : Character := ' ';
1344 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1345 -- first character (uppercase) of locking policy name if a valid
1346 -- Queuing_Policy pragma is encountered.
1348 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1350 -- Remember location of previous Queuing_Policy pragma. This is used for
1351 -- inconsistency error messages. A value of System_Location is used if the
1352 -- policy is set in package System.
1354 Quiet_Output : Boolean := False;
1355 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN
1356 -- Set to True if the tool should not have any output if there are no
1357 -- errors or warnings.
1359 Overriding_Renamings : Boolean := False;
1361 -- Set to True to enable compatibility mode with Rational compiler, and
1362 -- to accept renamings of implicit operations in their own scope.
1364 Relaxed_Elaboration_Checks : Boolean := False;
1366 -- Set to True to ignore certain elaboration scenarios, thus making the
1367 -- current ABE mechanism more permissive. This behavior is applicable to
1368 -- both the default and the legacy ABE models. Modified by use of -gnatJ.
1370 Relaxed_RM_Semantics : Boolean := False;
1372 -- Set to True to ignore some Ada semantic error to help parse legacy Ada
1373 -- code for use in e.g. static analysis (such as CodePeer). This deals
1374 -- with cases where other compilers allow illegal constructs. Tools such as
1375 -- CodePeer are interested in analyzing code rather than enforcing legality
1376 -- rules, so as long as these illegal constructs end up with code that can
1377 -- be handled by the tool in question, there is no reason to reject the
1378 -- code that is considered correct by the other compiler.
1380 Replace_In_Comments : Boolean := False;
1382 -- Set to True if -C switch used.
1384 RTS_Lib_Path_Name : String_Ptr := null;
1385 RTS_Src_Path_Name : String_Ptr := null;
1387 -- Set to the "adalib" and "adainclude" directories of the run time
1388 -- specified by --RTS=.
1390 RTS_Switch : Boolean := False;
1391 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1392 -- Set to True when the --RTS switch is set
1394 Run_Path_Option : Boolean := True;
1395 -- GNATMAKE, GNATLINK
1396 -- Set to False when no run_path_option should be issued to the linker
1398 Search_Directory_Present : Boolean := False;
1400 -- Set to True when argument is -I. Reset to False when next argument, a
1401 -- search directory path is taken into account. Note that this is quite
1402 -- different from other switches in this section in that it is only set in
1403 -- a transitory manner as a result of scanning a -I switch with no file
1404 -- name, and if set, is an indication that the next argument is to be
1405 -- treated as a file name.
1407 Sec_Stack_Used : Boolean := False;
1409 -- Set True if generated code uses the System.Secondary_Stack package. For
1410 -- the binder, set if any unit uses the secondary stack package.
1412 Setup_Projects : Boolean := False;
1414 -- Set to True for GNAT SETUP: the Project Manager creates nonexistent
1415 -- object, library, and exec directories.
1417 Shared_Libgnat : Boolean;
1419 -- Set to True if a shared libgnat is requested by using the -shared option
1420 -- for GNATBIND and to False when using the -static option. The value of
1421 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1423 Short_Circuit_And_Or : Boolean := False;
1425 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1427 type SPARK_Mode_Type is (None, Off, On);
1428 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as
1429 -- well as the value None, which indicates no such pragma/aspect applies.
1431 SPARK_Mode : SPARK_Mode_Type := None;
1433 -- Current SPARK mode setting.
1435 SPARK_Mode_Pragma : Node_Id := Empty;
1437 -- If the current SPARK_Mode (above) was set by a pragma, this records
1438 -- the pragma that set this mode.
1440 SPARK_Switches_File_Name : String_Ptr := null;
1442 -- Set to non-null file name by use of the -gnates switch to specify
1443 -- SPARK (gnat2why) specific switches in the given file name.
1445 Special_Exception_Package_Used : Boolean := False;
1447 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
1448 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
1449 -- local raise statements into gotos in the presence of either package.
1451 Sprint_Line_Limit : Nat := 72;
1453 -- Limit values for chopping long lines in Cprint/Sprint output, can be
1454 -- reset by use of NNN parameter with -gnatG or -gnatD switches.
1456 Stack_Checking_Enabled : Boolean := False;
1458 -- Set to indicate if stack checking is enabled for the compilation. This
1459 -- is set directly from the value in the gcc back end in the body of the
1460 -- gcc version of back_end.adb.
1462 Style_Check : Boolean := False;
1464 -- Set True to perform style checks. Activates checks carried out in
1465 -- package Style (see body of this package for details of checks). This
1466 -- flag is set True by use of either the -gnatg or -gnaty switches, or
1467 -- by the Style_Check pragma.
1469 Style_Check_Main : Boolean := False;
1471 -- Set True if Style_Check was set for the main unit. This is used to
1472 -- enable style checks for units in the main extended source that get
1473 -- with'ed indirectly. It is set True by use of either the -gnatg or
1474 -- -gnaty switches, but not by use of the Style_Checks pragma.
1476 Suppress_Control_Flow_Optimizations : Boolean := False;
1478 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1479 -- that interfere with coverage analysis based on the object code.
1481 System_Extend_Pragma_Arg : Node_Id := Empty;
1483 -- Set non-empty if and only if a correct Extend_System pragma was present
1484 -- in which case it points to the argument of the pragma, and the name can
1485 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1487 System_Extend_Unit : Node_Id := Empty;
1489 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1490 -- is never appropriate in GNAT_Mode (and causes troubles, including
1491 -- bogus circularities, if we try to compile the run-time library with
1492 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1493 -- is a copy of the value set in System_Extend_Pragma_Arg.
1495 Subunits_Missing : Boolean := False;
1497 -- This flag is set true if missing subunits are detected with code
1498 -- generation active. This causes code generation to be skipped.
1500 Suppress_Checks : Boolean := False;
1502 -- Set to True if -gnatp (suppress all checks) switch present.
1504 -- WARNING: There is a matching C declaration of this variable in fe.h
1506 Suppress_Options : Suppress_Record;
1508 -- Indicates outer level setting of check suppression. This initializes
1509 -- the settings of the outer scope level in any unit compiled. This is
1510 -- initialized by Osint.Initialize, and further initialized by the
1511 -- Adjust_Global_Switches flag in Gnat1drv.
1513 Table_Factor : Int := 1;
1515 -- Factor by which all initial table sizes set in Alloc are multiplied.
1516 -- Used in Table to calculate initial table sizes (the initial table size
1517 -- is the value in Alloc, used as the Table_Initial parameter value,
1518 -- multiplied by the factor given here. The default value is used if no
1519 -- -gnatT switch appears.
1521 Tagged_Type_Expansion : Boolean := True;
1523 -- Set True if tagged types and interfaces should be expanded by the
1524 -- front-end. If False, the original tree is left unexpanded for tagged
1525 -- types and dispatching calls, assuming the underlying target supports it.
1527 Target_Dependent_Info_Read_Name : String_Ptr := null;
1529 -- Set non-null to override the normal processing in Get_Targ and set the
1530 -- necessary information by reading the target dependent information file
1531 -- whose name is given here (see packages Get_Targ and Set_Targ for full
1532 -- details). Set to non-null file name by use of the -gnateT switch.
1534 Target_Dependent_Info_Write_Name : String_Ptr := null;
1536 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info
1537 -- which writes a target independent information file (see packages
1538 -- Get_Targ and Set_Targ for full details) using the name given by
1539 -- this switch. Set to non-null file name by use of the -gnatet switch.
1541 type Origin_Of_Target is (Unknown, Default, Specified);
1543 Target_Origin : Origin_Of_Target := Unknown;
1545 -- Indicates the origin of attribute Target in project files
1547 Target_Value : String_Access := null;
1549 -- Indicates the value of attribute Target in project files
1551 Task_Dispatching_Policy : Character := ' ';
1553 -- Set to ' ' for the default case (no task dispatching policy specified).
1554 -- Reset to first character (uppercase) of task dispatching policy name
1555 -- if a valid Task_Dispatching_Policy pragma is encountered.
1557 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1559 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1560 -- used for inconsistency error messages. A value of System_Location is
1561 -- used if the policy is set in package System.
1563 Tasking_Used : Boolean := False;
1564 -- Set True if any tasking construct is encountered. Used to activate the
1565 -- output of the Q, L and T lines in ALI files.
1567 Time_Slice_Set : Boolean := False;
1569 -- Set True if a pragma Time_Slice is processed in the main unit, or
1570 -- if the -gnatTnn switch is present to set a time slice value.
1572 Time_Slice_Value : Nat;
1574 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1575 -- Time_Slice pragma has been processed. Set to the time slice value in
1576 -- microseconds. Negative values are stored as zero, and the value is not
1577 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1578 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1580 Tolerate_Consistency_Errors : Boolean := False;
1582 -- Tolerate time stamp and other consistency errors. If this flag is set to
1583 -- True (-t), then inconsistencies result in warnings rather than errors.
1585 Treat_Categorization_Errors_As_Warnings : Boolean := False;
1586 -- Normally categorization errors are true illegalities. If this switch
1587 -- is set, then such errors result in warning messages rather than error
1588 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in
1589 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated
1590 -- pragma Preelaborate differently.
1592 Treat_Restrictions_As_Warnings : Boolean := False;
1594 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1597 Try_Semantics : Boolean := False;
1599 -- Flag set to force attempt at semantic analysis, even if parser errors
1600 -- occur. This will probably cause blowups at this stage in the game. On
1601 -- the other hand, most such blowups will be caught cleanly and simply
1602 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ.
1604 Unchecked_Shared_Lib_Imports : Boolean := False;
1606 -- Set to True when shared library projects are allowed to import projects
1607 -- that are not shared library projects. Set on by use of the switch
1608 -- --unchecked-shared-lib-imports.
1610 Undefined_Symbols_Are_False : Boolean := False;
1612 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1613 -- file for the compiler. Indicates that while preprocessing sources,
1614 -- symbols that are not defined have the value FALSE.
1616 Uneval_Old : Character := 'E';
1618 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma
1619 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E'
1620 -- for the RM default behavior of giving an error.
1622 Unique_Error_Tag : Boolean := Tag_Errors;
1624 -- Indicates if error messages are to be prefixed by the string error:
1625 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1627 Unnest_Subprogram_Mode : Boolean := False;
1628 -- If true, activates the circuitry for unnesting subprograms (see the spec
1629 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1.
1631 Unreserve_All_Interrupts : Boolean := False;
1633 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1634 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1635 -- corresponding attribute set in GNATBIND.
1637 Upper_Half_Encoding : Boolean := False;
1639 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1640 -- used in the normal way to represent themselves. If the wide character
1641 -- encoding method uses the upper bit for this encoding, then this flag is
1642 -- set True, and upper half characters in the source indicate the start of
1643 -- a wide character sequence. Set by -gnatW or -W switches.
1645 Use_Include_Path_File : Boolean := False;
1646 -- GNATMAKE, GPRBUILD
1647 -- When True, create a source search path file, even when a mapping file
1650 Usage_Requested : Boolean := False;
1651 -- GNAT, GNATBIND, GNATMAKE
1652 -- Set to True if -h (-gnath for the compiler) switch encountered
1653 -- requesting usage information
1655 Use_Pragma_Linker_Constructor : Boolean := False;
1657 -- True if pragma Linker_Constructor applies to adainit
1659 Use_VADS_Size : Boolean := False;
1661 -- Set to True if a valid pragma Use_VADS_Size is processed
1663 Validity_Checks_On : Boolean := True;
1665 -- This flag determines if validity checking is on or off. The initial
1666 -- state is on, and the required default validity checks are active. The
1667 -- actual set of checks that is performed if Validity_Checks_On is set is
1668 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1669 -- is controlled by pragma Validity_Checks (On | Off), and also some
1670 -- generated compiler code (typically code that has to do with validity
1671 -- check generation) is compiled with this flag set to False. This flag is
1672 -- set to False by the -gnatp switch.
1674 Verbose_Mode : Boolean := False;
1675 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1676 -- GPRBUILD, GPRCLEAN
1677 -- Set to True to get verbose mode (full error message text and location
1678 -- information sent to standard output, also header, copyright and summary)
1680 type Verbosity_Level_Type is (None, Low, Medium, High);
1681 pragma Ordered (Verbosity_Level_Type);
1682 Verbosity_Level : Verbosity_Level_Type := High;
1684 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates
1685 -- the level of verbosity of informational messages:
1687 -- In Low Verbosity, the reasons why a source is recompiled, the name
1688 -- of the executable and the reason it must be rebuilt is output.
1690 -- In Medium Verbosity, additional lines are output for each ALI file
1693 -- In High Verbosity, additional lines are output when the ALI file
1694 -- is part of an Ada library, is read-only or is part of the runtime.
1696 Warn_On_Ada_2005_Compatibility : Boolean := True;
1698 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1699 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1700 -- mode. Set by default, modified by use of -gnatwy/Y.
1702 Warn_On_Ada_2012_Compatibility : Boolean := True;
1704 -- Set to True to generate all warnings on Ada 2012 compatibility issues,
1705 -- including warnings on Ada 2012 obsolescent features used in Ada 2012
1706 -- mode. Modified by use of -gnatwy/Y.
1708 Warn_On_Ada_202X_Compatibility : Boolean := True;
1710 -- Set to True to generate all warnings on Ada 202X compatibility issues,
1711 -- including warnings on Ada 202X obsolescent features used in Ada 202X
1712 -- mode. ???There is no warning switch for this yet.
1714 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1716 -- Set to True to generate warnings in all cases where a variable is
1717 -- modified by being passed as to an OUT formal, but the resulting value is
1718 -- never read. The default is that this warning is suppressed. Modified
1719 -- by use of gnatw.o/.O.
1721 Warn_On_Assertion_Failure : Boolean := True;
1723 -- Set to True to activate warnings on assertions that can be determined
1724 -- at compile time will always fail. Modified by use of -gnatw.a/.A.
1726 Warn_On_Assumed_Low_Bound : Boolean := True;
1728 -- Set to True to activate warnings for string parameters that are indexed
1729 -- with literals or S'Length, presumably assuming a lower bound of one.
1730 -- Modified by use of -gnatww/W.
1732 Warn_On_Atomic_Synchronization : Boolean := False;
1734 -- Set to True to generate information messages for atomic synchronization.
1735 -- Modified by use of -gnatw.n/.N.
1737 Warn_On_Bad_Fixed_Value : Boolean := False;
1739 -- Set to True to generate warnings for static fixed-point expression
1740 -- values that are not an exact multiple of the small value of the type.
1741 -- Odd by default, modified by use of -gnatwb/B.
1743 Warn_On_Biased_Representation : Boolean := True;
1745 -- Set to True to generate warnings for size clauses, component clauses
1746 -- and component_size clauses that force biased representation. Modified
1747 -- by use of -gnatw.b/.B.
1749 Warn_On_Constant : Boolean := False;
1751 -- Set to True to generate warnings for variables that could be declared
1752 -- as constants. Modified by use of -gnatwk/K.
1754 Warn_On_Deleted_Code : Boolean := False;
1756 -- Set to True to generate warnings for code deleted by the front end
1757 -- for conditional statements whose outcome is known at compile time.
1758 -- Modified by use of -gnatwt/T.
1760 Warn_On_Dereference : Boolean := False;
1762 -- Set to True to generate warnings for implicit dereferences for array
1763 -- indexing and record component access. Modified by use of -gnatwd/D.
1765 Warn_On_Export_Import : Boolean := True;
1767 -- Set to True to generate warnings for suspicious use of export or
1768 -- import pragmas. Modified by use of -gnatwx/X.
1770 Warn_On_Elab_Access : Boolean := False;
1772 -- Set to True to generate warnings for P'Access in the case where
1773 -- subprogram P is in the same package as the P'Access, and the P'Access is
1774 -- evaluated at package elaboration time, and occurs before the body of P
1775 -- has been elaborated.
1777 Warn_On_Hiding : Boolean := False;
1779 -- Set to True to generate warnings if a declared entity hides another
1780 -- entity. The default is that this warning is suppressed. Modified by
1781 -- use of -gnatwh/H.
1783 Warn_On_Modified_Unread : Boolean := False;
1785 -- Set to True to generate warnings if a variable is assigned but is never
1786 -- read. Also controls warnings for similar cases involving out parameters,
1787 -- but only if there is only one out parameter for the procedure involved.
1788 -- The default is that this warning is suppressed, modified by use of
1791 Warn_On_No_Value_Assigned : Boolean := True;
1793 -- Set to True to generate warnings if no value is ever assigned to a
1794 -- variable that is at least partially uninitialized. Set to false to
1795 -- suppress such warnings. The default is that such warnings are enabled.
1796 -- Modified by use of -gnatwv/V.
1798 Warn_On_Non_Local_Exception : Boolean := False;
1800 -- Set to True to generate warnings for non-local exception raises and also
1801 -- handlers that can never handle a local raise. This warning is only ever
1802 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1803 -- default is not to generate the warnings except that if the source has
1804 -- at least one exception handler, and this restriction is set, and the
1805 -- warning was not explicitly turned off, then it is turned on by default.
1806 -- Modified by use of -gnatw.x/.X.
1808 No_Warn_On_Non_Local_Exception : Boolean := False;
1810 -- This is set to True if the above warning is explicitly suppressed. We
1811 -- use this to avoid turning it on by default when No_Exception_Propagation
1812 -- restriction is set and an exception handler is present.
1814 Warn_On_Object_Renames_Function : Boolean := False;
1816 -- Set to True to generate warnings when a function result is renamed as
1817 -- an object. The default is that this warning is disabled. Modified by
1818 -- use of -gnatw.r/.R.
1820 Warn_On_Obsolescent_Feature : Boolean := False;
1822 -- Set to True to generate warnings on use of any feature in Annex or if a
1823 -- subprogram is called for which a pragma Obsolescent applies. Modified
1824 -- by use of -gnatwj/J.
1826 Warn_On_Overlap : Boolean := False;
1828 -- Set to True to generate warnings when a writable actual overlaps with
1829 -- another actual in a subprogram call. This applies only in modes before
1830 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal.
1831 -- Modified by use of -gnatw.i/.I.
1833 Warn_On_Questionable_Missing_Parens : Boolean := True;
1835 -- Set to True to generate warnings for cases where parentheses are missing
1836 -- and the usage is questionable, because the intent is unclear. On by
1837 -- default, modified by use of -gnatwq/Q.
1839 Warn_On_Parameter_Order : Boolean := False;
1841 -- Set to True to generate warnings for cases where the argument list for
1842 -- a call is a sequence of identifiers that match the formal identifiers,
1843 -- but are in the wrong order.
1845 Warn_On_Redundant_Constructs : Boolean := False;
1847 -- Set to True to generate warnings for redundant constructs (e.g. useless
1848 -- assignments/conversions). The default is that this warning is disabled.
1849 -- Modified by use of -gnatwr/R.
1851 Warn_On_Reverse_Bit_Order : Boolean := True;
1853 -- Set to True to generate warning (informational) messages for component
1854 -- clauses that are affected by non-standard bit-order. The default is
1855 -- that this warning is enabled. Modified by -gnatw.v/.V.
1857 Warn_On_Suspicious_Contract : Boolean := True;
1859 -- Set to True to generate warnings for suspicious contracts expressed as
1860 -- pragmas or aspects precondition and postcondition, as well as other
1861 -- suspicious cases of expressions typically found in contracts like
1862 -- quantified expressions and uses of Update attribute. The default is that
1863 -- this warning is enabled. Modified by use of -gnatw.t/.T.
1865 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1867 -- Set to True to generate warnings for suspicious modulus values. The
1868 -- default is that this warning is enabled. Modified by -gnatw.m/.M.
1870 Warn_On_Unchecked_Conversion : Boolean := True;
1872 -- Set to True to generate warnings for unchecked conversions that may have
1873 -- non-portable semantics (e.g. because sizes of types differ). Modified
1874 -- by use of -gnatwz/Z.
1876 Warn_On_Unordered_Enumeration_Type : Boolean := False;
1878 -- Set to True to generate warnings for inappropriate uses (comparisons
1879 -- and explicit ranges) on unordered enumeration types (which includes
1880 -- all enumeration types for which pragma Ordered is not given). The
1881 -- default is that this warning is disabled. Modified by -gnat.u/.U.
1883 Warn_On_Unrecognized_Pragma : Boolean := True;
1885 -- Set to True to generate warnings for unrecognized pragmas. The default
1886 -- is that this warning is enabled. Modified by use of -gnatwg/G.
1888 Warn_On_Unrepped_Components : Boolean := False;
1890 -- Set to True to generate warnings for the case of components of record
1891 -- which have a record representation clause but this component does not
1892 -- have a component clause. Modified by use of -gnatw.c/.C.
1894 Warn_On_Warnings_Off : Boolean := False;
1896 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1897 -- where either the pragma is never used, or it could be replaced by a
1898 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma
1899 -- Warning (Off, string) which either has no matching pragma Warning On,
1900 -- or where no warning has been suppressed by the use of the pragma.
1901 -- Modified by use of -gnatw.w/.W.
1903 type Warning_Mode_Type is
1904 (Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors);
1905 Warning_Mode : Warning_Mode_Type := Normal;
1907 -- Controls treatment of warning messages. If set to Suppress, warning
1908 -- messages are not generated at all. In Normal mode, they are generated
1909 -- but do not count as errors. In Treat_As_Error mode, warning messages are
1910 -- generated and treated as errors, except for warnings emitted by the
1911 -- Compile_Time_Warning pragma. In Treat_Run_Time_Warnings_As_Errors,
1912 -- warning messages regarding errors raised at run time are treated as
1913 -- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be
1914 -- ignored (except for legality checks), unless we are in GNATprove_Mode,
1915 -- which requires pragma Warnings to be stored for the formal verification
1918 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1920 -- Method used for encoding wide characters in the source program. See
1921 -- description of type in unit System.WCh_Con for a list of the methods
1922 -- that are currently supported. Note that brackets notation is always
1923 -- recognized in source programs regardless of the setting of this
1924 -- variable. The default setting causes only the brackets notation to be
1925 -- recognized. If this is the main unit, this setting also controls the
1926 -- output of the W=? parameter in the ALI file, which is used to provide
1927 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1928 -- the value set here overrides this main unit default.
1930 Wide_Character_Encoding_Method_Specified : Boolean := False;
1932 -- Set True if the value in Wide_Character_Encoding_Method was set as
1933 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1935 Xref_Active : Boolean := True;
1937 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1939 Zero_Formatting : Boolean := False;
1941 -- Do no formatting (no title, no leading spaces, no empty lines) in
1942 -- auxiliary outputs (-e, -K, -l, -R).
1944 ----------------------------
1945 -- Configuration Settings --
1946 ----------------------------
1948 -- These are settings that are used to establish the mode at the start of
1949 -- each unit. The values defined below can be affected either by command
1950 -- line switches, or by the use of appropriate configuration pragmas in a
1951 -- configuration pragma file (but NOT by a local use of a configuration
1952 -- pragma in a single file).
1954 Ada_Version_Config : Ada_Version_Type;
1956 -- This is the value of the configuration switch for the Ada 83 mode, as
1957 -- set by the command line switches -gnat83/95/2005/2012, and possibly
1958 -- modified by the use of configuration pragmas Ada_*. This switch is used
1959 -- to set the initial value for Ada_Version mode at the start of analysis
1960 -- of a unit. Note however that the setting of this flag is ignored for
1961 -- internal and predefined units (which are always compiled in the most up
1962 -- to date version of Ada).
1964 Ada_Version_Pragma_Config : Node_Id;
1965 -- This will be set nonempty if it is set by a configuration pragma
1967 Ada_Version_Explicit_Config : Ada_Version_Type;
1969 -- This is set in the same manner as Ada_Version_Config. The difference is
1970 -- that the setting of this flag is not ignored for internal and predefined
1971 -- units, which for some purposes do indeed access this value, regardless
1972 -- of the fact that they are compiled the most up to date ada version).
1974 Assertions_Enabled_Config : Boolean;
1976 -- This is the value of the configuration switch for assertions enabled
1977 -- mode, as possibly set by the command line switch -gnata, and possibly
1978 -- modified by the use of the configuration pragma Assertion_Policy.
1980 Assume_No_Invalid_Values_Config : Boolean;
1982 -- This is the value of the configuration switch for assuming "no invalid
1983 -- values enabled" mode, as possibly set by the command line switch
1984 -- -gnatB, and possibly modified by the use of the configuration pragma
1985 -- Assume_No_Invalid_Values.
1987 Check_Float_Overflow_Config : Boolean;
1989 -- Set to True to check that operations on predefined unconstrained float
1990 -- types (e.g. Float, Long_Float) do not overflow and generate infinities
1991 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use
1992 -- of the -gnateF switch.
1994 Check_Policy_List_Config : Node_Id;
1996 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1997 -- that are linked through the Next_Pragma fields, with the list being
1998 -- terminated by Empty. The order is most recently processed first. This
1999 -- list includes only those pragmas in configuration pragma files.
2001 Default_Pool_Config : Node_Id := Empty;
2003 -- Same as Default_Pool above, except this is only for Default_Storage_Pool
2004 -- pragmas that are configuration pragmas.
2006 Default_SSO_Config : Character := ' ';
2008 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration
2009 -- pragma. A value of ' ' means that no pragma was given, otherwise the
2010 -- value is 'H' for High_Order_First or 'L' for Low_Order_First.
2012 Dynamic_Elaboration_Checks_Config : Boolean := False;
2014 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
2015 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
2017 Exception_Locations_Suppressed_Config : Boolean := False;
2019 -- Set True by use of the configuration pragma Suppress_Exception_Messages
2021 Extensions_Allowed_Config : Boolean;
2023 -- This is the flag that indicates whether extensions are allowed. It can
2024 -- be set True either by use of the -gnatX switch, or by use of the
2025 -- configuration pragma Extensions_Allowed (On). It is always set to True
2026 -- for internal GNAT units, since extensions are always permitted in such
2029 External_Name_Exp_Casing_Config : External_Casing_Type;
2031 -- This is the value of the configuration switch that controls casing of
2032 -- external symbols for which an explicit external name is given. It can be
2033 -- set to Uppercase by the command line switch -gnatF, and further modified
2034 -- by the use of the configuration pragma External_Name_Casing in the
2035 -- gnat.adc file. This flag is used to set the initial value for
2036 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
2037 -- however that the setting of this flag is ignored for internal and
2038 -- predefined units (which are always compiled with As_Is mode).
2040 External_Name_Imp_Casing_Config : External_Casing_Type;
2042 -- This is the value of the configuration switch that controls casing of
2043 -- external symbols where the external name is implicitly given. It can be
2044 -- set to Uppercase by the command line switch -gnatF, and further modified
2045 -- by the use of the configuration pragma External_Name_Casing in the
2046 -- gnat.adc file. This flag is used to set the initial value for
2047 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
2048 -- however that the setting of this flag is ignored for internal and
2049 -- predefined units (which are always compiled with Lowercase mode).
2051 Fast_Math_Config : Boolean;
2053 -- This is the value of the configuration switch that controls Fast_Math
2054 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
2055 -- used to set the initial value of Fast_Math at the start of each new
2056 -- compilation unit.
2058 Initialize_Scalars_Config : Boolean;
2060 -- This is the value of the configuration switch that is set by the
2061 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
2062 -- This switch is not set when the pragma appears ahead of a given
2063 -- unit, so it does not affect the compilation of other units.
2065 No_Component_Reordering_Config : Boolean;
2067 -- This is the value of the configuration switch that is set by the
2068 -- pragma No_Component_Reordering when it appears in the gnat.adc file.
2069 -- This flag is used to set the initial value of No_Component_Reordering
2070 -- at the start of each compilation unit, except that it is always set
2071 -- False for predefined units.
2073 No_Exit_Message : Boolean := False;
2074 -- GNATMAKE, GPRBUILD
2075 -- Set with switch --no-exit-message. When True, if there are compilation
2076 -- failures, the builder does not issue an exit error message.
2078 Optimize_Alignment_Config : Character;
2080 -- This is the value of the configuration switch that controls the
2081 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
2082 -- It is used to set the initial value of Optimize_Alignment at the start
2083 -- of each new compilation unit, except that it is always set to 'O' (off)
2084 -- for internal units.
2086 Persistent_BSS_Mode_Config : Boolean;
2088 -- This is the value of the configuration switch that controls whether
2089 -- potentially persistent data is to be placed in the persistent_bss
2090 -- section. It can be set True by use of the pragma Persistent_BSS.
2091 -- This flag is used to set the initial value of Persistent_BSS_Mode
2092 -- at the start of each compilation unit, except that it is always
2093 -- set False for predefined units.
2095 Polling_Required_Config : Boolean;
2097 -- This is the value of the configuration switch that controls polling
2098 -- mode. It can be set True by the command line switch -gnatP, and then
2099 -- further modified by the use of pragma Polling in the gnat.adc file. This
2100 -- flag is used to set the initial value for Polling_Required at the start
2101 -- of analyzing each unit.
2103 Prefix_Exception_Messages_Config : Boolean;
2104 -- The setting of Prefix_Exception_Messages from configuration pragmas
2106 SPARK_Mode_Config : SPARK_Mode_Type := None;
2108 -- The setting of SPARK_Mode from configuration pragmas
2110 SPARK_Mode_Pragma_Config : Node_Id := Empty;
2111 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting
2112 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node.
2114 Uneval_Old_Config : Character;
2116 -- The setting of Uneval_Old from configuration pragmas
2118 Use_VADS_Size_Config : Boolean;
2120 -- This is the value of the configuration switch that controls the use of
2121 -- VADS_Size instead of Size wherever the attribute Size is used. It can
2122 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
2123 -- This flag is used to set the initial value for Use_VADS_Size at the
2124 -- start of analyzing each unit. Note however that the setting of this flag
2125 -- is ignored for internal and predefined units (which are always compiled
2126 -- with the standard Size semantics).
2128 type Config_Switches_Type is private;
2129 -- Type used to save values of the switches set from Config values
2131 procedure Register_Config_Switches;
2132 -- This procedure is called after processing the gnat.adc file and other
2133 -- configuration pragma files to record the values of the Config switches,
2134 -- as possibly modified by the use of command line switches and pragmas
2135 -- appearing in these files.
2137 procedure Restore_Config_Switches (Save : Config_Switches_Type);
2138 -- This procedure restores a set of switch values previously saved by a
2139 -- call to Save_Config_Switches.
2141 function Save_Config_Switches return Config_Switches_Type;
2142 -- Return the current state of all configuration-related attributes
2144 procedure Set_Config_Switches
2145 (Internal_Unit : Boolean;
2146 Main_Unit : Boolean);
2147 -- This procedure sets the switches to the appropriate initial values. The
2148 -- parameter Internal_Unit is True for an internal or predefined unit, and
2149 -- affects the way the switches are set (see above). Main_Unit is true if
2150 -- switches are being set for the main unit or for the spec of the main
2151 -- unit. This affects setting of the assert/debug pragma switches, which
2152 -- are normally set false by default for an internal unit, except when the
2153 -- internal unit is the main unit, in which case we use the command line
2156 ------------------------
2157 -- Other Global Flags --
2158 ------------------------
2160 Building_Static_Dispatch_Tables : Boolean := True;
2161 -- This flag indicates if the backend supports generation of statically
2162 -- allocated dispatch tables. If it is True, then the front end will
2163 -- generate static aggregates for dispatch tables that contain forward
2164 -- references to addresses of subprograms not seen yet, and the back end
2165 -- must be prepared to handle this case. If it is False, then the front end
2166 -- generates assignments to initialize the dispatch table, and there are
2167 -- no such forward references. By default we build statically allocated
2168 -- dispatch tables for all library-level tagged types in all platforms.
2169 -- This behavior can be disabled using switch -gnatd.t which will set
2170 -- this flag to False and revert to the previous dynamic behavior.
2172 Expander_Active : Boolean := False;
2173 -- A flag that indicates if expansion is active (True) or deactivated
2174 -- (False). When expansion is deactivated all calls to expander routines
2175 -- have no effect. Note that the initial setting of False is merely to
2176 -- prevent saving of an undefined value for an initial call to the
2177 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
2178 -- this flag, see package Expander. Indeed this flag might more logically
2179 -- be in the spec of Expander, but it is referenced by Errout, and it
2180 -- really seems wrong for Errout to depend on Expander.
2182 Tagged_Seen : Boolean := False;
2183 -- Set True by the parser if the "tagged" reserved word is seen. This is
2184 -- needed in Exp_Put_Image (see that package for documentation).
2186 -----------------------------------
2187 -- Modes for Formal Verification --
2188 -----------------------------------
2190 GNATprove_Mode : Boolean := False;
2191 -- Specific compiling mode targeting formal verification for those parts
2192 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True
2193 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note
2194 -- that this is completely separate from the SPARK restriction defined in
2195 -- GNAT to detect violations of a subset of SPARK 2005 rules.
2197 ---------------------------
2198 -- Error/Warning Control --
2199 ---------------------------
2201 -- The following array would more reasonably be located in Err_Vars or
2202 -- Errout, but we put them here to deal with licensing issues (we need
2203 -- this to have the GPL exception licensing, since these variables and
2204 -- subprograms are accessed from units with this licensing).
2206 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr;
2207 -- Table for recording Warning_As_Error pragmas as they are processed. It
2208 -- would be nicer to use Table, but there are circular elaboration problems
2209 -- if we try to do this, and an attempt to find some other appropriately
2210 -- licensed unit to declare this as a Table failed with various elaboration
2213 Warnings_As_Errors_Count : Natural;
2215 -- Number of entries stored in Warnings_As_Errors table
2217 Warnings_As_Errors_Count_Config : Natural;
2219 -- Count of pattern strings stored from Warning_As_Error pragmas
2225 GNAT_Mode : Boolean := False;
2227 -- True if compiling in GNAT system mode (-gnatg switch)
2229 -- WARNING: There is a matching C declaration of this variable in fe.h
2231 GNAT_Mode_Config : Boolean := False;
2233 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to
2234 -- True during the analysis of a system unit, but GNAT_Mode_Config must
2235 -- not change once scanned and set.
2237 -- Setting GNAT mode has the following effects on the language that is
2238 -- accepted. Note that several of the following have the effect of changing
2239 -- an error to a warning. But warnings are usually treated as fatal errors
2240 -- in -gnatg mode, so to actually take advantage of such a change, it is
2241 -- necessary to add an explicit pragma Warnings (Off) in the source and
2242 -- this requires clear documentation of why this is necessary.
2244 -- The identifier character set is set to 'n' (7-bit ASCII)
2246 -- Pragma Extend_System is ignored
2248 -- Warning_Mode is set to Treat_As_Error (-gnatwe)
2250 -- Standard style checks are set (See Set_GNAT_Style_Check_Options)
2252 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings)
2254 -- The Ada version is set to Ada 2012
2256 -- Task priorities are always allowed to be in the range Any_Priority
2258 -- Overflow checks are suppressed, overflow checking set to strict mode
2260 -- ALI files are always generated for predefined generic packages
2262 -- Obsolescent feature warnings are suppressed
2264 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed
2266 -- The Scalar_Storage_Order attribute applies to generic types
2268 -- Categorization errors are treated as warnings rather than errors
2270 -- Statements in preelaborated units give warnings rather than errors
2272 -- Private objects are allowed in preelaborated units
2274 -- Non-static constants in preelaborated units give warnings not errors
2276 -- The warning about component size being ignored is suppressed
2278 -- The warning about size clauses being ignored is suppressed
2280 -- Initializing limited types gives a warning rather than an error
2282 -- Copying of limited objects is allowed
2284 -- Returning objects of limited types is allowed
2286 -- Non-static call in preelaborated unit give a warning, not an error
2288 -- Warnings on possible elaboration errors are suppressed
2290 -- Warnings about packing being ignored are suppressed
2292 -- Warnings in internal units are not suppressed (they normally are)
2294 -- The only special comment sequence allowed is --!
2296 --------------------------
2297 -- Private Declarations --
2298 --------------------------
2301 -- The following type is used to save and restore settings of switches in
2302 -- Opt that represent the configuration (i.e. result of config pragmas).
2304 -- Note that Ada_Version_Explicit is not included, since this is a sticky
2305 -- flag that once set does not get reset, since the whole idea of this flag
2306 -- is to record the setting for the main unit.
2308 type Config_Switches_Type is record
2309 Ada_Version : Ada_Version_Type;
2310 Ada_Version_Explicit : Ada_Version_Type;
2311 Ada_Version_Pragma : Node_Id;
2312 Assertions_Enabled : Boolean;
2313 Assume_No_Invalid_Values : Boolean;
2314 Check_Float_Overflow : Boolean;
2315 Check_Policy_List : Node_Id;
2316 Default_Pool : Node_Id;
2317 Default_SSO : Character;
2318 Dynamic_Elaboration_Checks : Boolean;
2319 Exception_Locations_Suppressed : Boolean;
2320 Extensions_Allowed : Boolean;
2321 External_Name_Exp_Casing : External_Casing_Type;
2322 External_Name_Imp_Casing : External_Casing_Type;
2323 Fast_Math : Boolean;
2324 Initialize_Scalars : Boolean;
2325 No_Component_Reordering : Boolean;
2326 Normalize_Scalars : Boolean;
2327 Optimize_Alignment : Character;
2328 Optimize_Alignment_Local : Boolean;
2329 Persistent_BSS_Mode : Boolean;
2330 Polling_Required : Boolean;
2331 Prefix_Exception_Messages : Boolean;
2332 SPARK_Mode : SPARK_Mode_Type;
2333 SPARK_Mode_Pragma : Node_Id;
2334 Uneval_Old : Character;
2335 Use_VADS_Size : Boolean;
2336 Warnings_As_Errors_Count : Natural;
2339 -- The following declarations are for GCC version dependent flags. We do
2340 -- not let client code in the compiler test GCC_Version directly, but
2341 -- instead use deferred constants for relevant feature tags.
2343 -- Note: there currently are no such constants defined in this section,
2344 -- since the compiler front end is currently entirely independent of the
2345 -- GCC version, which is a desirable state of affairs.
2347 function get_gcc_version return Int;
2348 pragma Import (C, get_gcc_version, "get_gcc_version");
2350 GCC_Version : constant Nat := get_gcc_version;
2352 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
2353 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
git://gcc.gnu.org / gcc.git / blob