------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- O P T --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- . --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains global flags set by the initialization routine from
-- the command line and referenced throughout the compiler, the binder, or
-- other GNAT tools. The comments indicate which options are used by which
-- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
-- Some flags are labelled "PROJECT MANAGER". These are used by tools that
-- use the Project Manager. These tools include gnatmake, gnatname, the gnat
-- driver, gnatclean, gprbuild and gprclean.
with Debug;
with Hostparm; use Hostparm;
with Types; use Types;
with System.Strings; use System.Strings;
with System.WCh_Con; use System.WCh_Con;
package Opt is
----------------------------------------------
-- Settings of Modes for Current Processing --
----------------------------------------------
-- The following mode values represent the current state of processing.
-- The values set here are the default values. Unless otherwise noted,
-- the value may be reset in Switch-? with an appropriate switch. In
-- some cases, the values can also be modified by pragmas, and in the
-- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
-- the default values.
Ada_Bind_File : Boolean := True;
-- GNATBIND, GNATLINK
-- Set True if binder file to be generated in Ada rather than C
type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
pragma Warnings (Off, Ada_Version_Type);
-- Versions of Ada for Ada_Version below. Note that these are ordered,
-- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
-- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
-- which we want to allow, so that things work OK when Ada_15 is added!
-- This warning is now removed, so this pragma can be removed some time???
Ada_Version_Default : Ada_Version_Type := Ada_05;
-- GNAT
-- Default Ada version if no switch given
Ada_Version : Ada_Version_Type := Ada_Version_Default;
-- GNAT
-- Current Ada version for compiler, as set by configuration pragmas,
-- compiler switches, or implicitly (to Ada_Version_Runtime) when a
-- predefined or internal file is compiled.
Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
-- GNAT
-- Like Ada_Version, but does not get set implicitly for predefined
-- or internal units, so it reflects the Ada version explicitly set
-- using configuration pragmas or compiler switches (or if neither
-- appears, it remains set to Ada_Version_Default). This is used in
-- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
-- where in the run-time we want the explicit version set.
Ada_Version_Runtime : Ada_Version_Type := Ada_05;
-- GNAT
-- Ada version used to compile the runtime. Used to set Ada_Version (but
-- not Ada_Version_Explicit) when compiling predefined or internal units.
Ada_Final_Suffix : constant String := "final";
Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
-- GNATBIND
-- The name of the procedure that performs the finalization at the end of
-- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
Ada_Init_Suffix : constant String := "init";
Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
-- GNATBIND
-- The name of the procedure that performs initialization at the start
-- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
Ada_Main_Name_Suffix : constant String := "main";
-- GNATBIND
-- The suffix for Ada_Main_Name. Defined as a constant here so that it
-- can be referenced in a uniform manner to create either the default
-- value of Ada_Main_Name (declared below), or the non-default name
-- set by Gnatbind.Scan_Bind_Arg.
Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
-- GNATBIND
-- The name of the Ada package generated by the binder (when in Ada mode).
-- This variable may be modified by Gnatbind.Scan_Bind_Arg.
Address_Clause_Overlay_Warnings : Boolean := True;
-- GNAT
-- Set False to disable address clause warnings
Address_Is_Private : Boolean := False;
-- GNAT, GNATBIND
-- Set True if package System has the line "type Address is private;"
All_Errors_Mode : Boolean := False;
-- GNAT
-- Flag set to force display of multiple errors on a single line and
-- also repeated error messages for references to undefined identifiers
-- and certain other repeated error messages. Set by use of -gnatf.
All_Sources : Boolean := False;
-- GNATBIND
-- Set to True to require all source files to be present. This flag is
-- directly modified by gnatmake to affect the shared binder routines.
Alternate_Main_Name : String_Ptr := null;
-- GNATBIND
-- Set to non null when Bind_Alternate_Main_Name is True. This value
-- is modified as needed by Gnatbind.Scan_Bind_Arg.
ASIS_Mode : Boolean := False;
-- GNAT
-- Enable semantic checks and tree transformations that are important
-- for ASIS but that are usually skipped if Operating_Mode is set to
-- Check_Semantics. This flag does not have the corresponding option to set
-- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
-- from the code of GNSA-based tool (a client may need to set ON the
-- Back_Annotate_Rep_Info flag in this case. At the moment this does not
-- make very much sense, because GNSA cannot do back annotation).
Assertions_Enabled : Boolean := False;
-- GNAT
-- Enable assertions made using pragma Assert
Assume_No_Invalid_Values : Boolean := False;
-- GNAT
-- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
-- that values could have invalid representations, unless it can clearly
-- prove that the values are valid. If this switch is set (by -gnatB or by
-- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
-- are valid and in range of their representations. This feature is now
-- fully enabled in the compiler.
Back_Annotate_Rep_Info : Boolean := False;
-- GNAT
-- If set True, enables back annotation of representation information
-- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
-- (list representation information) or -gnatt (generate tree). It is
-- also set true if certain Unchecked_Conversion instantiations require
-- checking based on annotated values.
Bind_Alternate_Main_Name : Boolean := False;
-- GNATBIND
-- True if main should be called Alternate_Main_Name.all.
-- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
Bind_Main_Program : Boolean := True;
-- GNATBIND
-- Set to False if not binding main Ada program
Bind_For_Library : Boolean := False;
-- GNATBIND
-- Set to True if the binder needs to generate a file designed for
-- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
Bind_Only : Boolean := False;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- Set to True to skip compile and link steps
-- (except when Compile_Only and/or Link_Only are True).
Blank_Deleted_Lines : Boolean := False;
-- GNAT, GNATPREP
-- Output empty lines for each line of preprocessed input that is deleted
-- in the output, including preprocessor lines starting with a '#'.
Brief_Output : Boolean := False;
-- GNAT, GNATBIND
-- Force brief error messages to standard error, even if verbose mode is
-- set (so that main error messages go to standard output).
Build_Bind_And_Link_Full_Project : Boolean := False;
-- GNATMAKE
-- Set to True to build, bind and link all the sources of a project file
-- (switch -B)
Check_Object_Consistency : Boolean := False;
-- GNATBIND, GNATMAKE
-- Set to True to check whether every object file is consistent with
-- its corresponding ada library information (ALI) file. An object
-- file is inconsistent with the corresponding ALI file if the object
-- file does not exist or if it has an older time stamp than the ALI file.
-- Default above is for GNATBIND. GNATMAKE overrides this default to
-- True (see Make.Initialize) since we normally do need to check source
-- consistencies in gnatmake.
Check_Only : Boolean := False;
-- GNATBIND
-- Set to True to do checks only, no output of binder file
Check_Policy_List : Node_Id := Empty;
-- GNAT
-- This points to the list of N_Pragma nodes for Check_Policy pragmas
-- that are linked through the Next_Pragma fields, with the list being
-- terminated by Empty. The order is most recently processed first.
Check_Readonly_Files : Boolean := False;
-- GNATMAKE
-- Set to True to check readonly files during the make process
Check_Source_Files : Boolean := True;
-- GNATBIND, GNATMAKE
-- Set to True to enable consistency checking for any source files that
-- are present (i.e. date must match the date in the library info file).
-- Set to False for object file consistency check only. This flag is
-- directly modified by gnatmake, to affect the shared binder routines.
Check_Switches : Boolean := False;
-- GNATMAKE, GPRMAKE, GPBUILD
-- Set to True to check compiler options during the make process
Check_Unreferenced : Boolean := False;
-- GNAT
-- Set to True to enable checking for unreferenced entities other
-- than formal parameters (for which see Check_Unreferenced_Formals)
Check_Unreferenced_Formals : Boolean := False;
-- GNAT
-- Set True to check for unreferenced formals. This is turned on by
-- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
Check_Withs : Boolean := False;
-- GNAT
-- Set to True to enable checking for unused withs, and also the case
-- of withing a package and using none of the entities in the package.
Commands_To_Stdout : Boolean := False;
-- GNATMAKE
-- True if echoed commands to be written to stdout instead of stderr
Comment_Deleted_Lines : Boolean := False;
-- GNATPREP
-- True if source lines removed by the preprocessor should be commented
-- in the output file.
Compile_Only : Boolean := False;
-- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
-- GNATMAKE, GPRMAKE, GPRMAKE:
-- set to True to skip bind and link steps (except when Bind_Only is
-- True).
-- GNATCLEAN, GPRCLEAN:
-- set to True to delete only the files produced by the compiler but not
-- the library files or the executable files.
Config_File : Boolean := True;
-- GNAT
-- Set to False to inhibit reading and processing of gnat.adc file
Config_File_Names : String_List_Access := null;
-- GNAT
-- Names of configuration pragmas files (given by switches -gnatec)
Configurable_Run_Time_Mode : Boolean := False;
-- GNAT, GNATBIND
-- Set True if the compiler is operating in configurable run-time mode.
-- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
-- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
-- for details on the handling of the latter pragma.
Constant_Condition_Warnings : Boolean := False;
-- GNAT
-- Set to True to activate warnings on constant conditions
Create_Mapping_File : Boolean := False;
-- GNATMAKE, GPRMAKE
-- Set to True (-C switch) to indicate that the compiler will be invoked
-- with a mapping file (-gnatem compiler switch).
Debug_Pragmas_Enabled : Boolean := False;
-- GNAT
-- Enable debug statements from pragma Debug
subtype Debug_Level_Value is Nat range 0 .. 3;
Debugger_Level : Debug_Level_Value := 0;
-- GNATBIND
-- The value given to the -g parameter. The default value for -g with
-- no value is 2. This is usually ignored by GNATBIND, except in the
-- VMS version where it is passed as an argument to __gnat_initialize
-- to trigger the activation of the remote debugging interface.
-- Is this still true ???
Debug_Generated_Code : Boolean := False;
-- GNAT
-- Set True (-gnatD switch) to debug generated expanded code instead
-- of the original source code. Causes debugging information to be
-- written with respect to the generated code file that is written.
Default_Exit_Status : Int := 0;
-- GNATBIND
-- Set the default exit status value. Set by the -Xnnn switch for the
-- binder.
Default_Stack_Size : Int := -1;
-- GNATBIND
-- Set to default primary stack size in units of bytes. Set by
-- the -dnnn switch for the binder. A value of -1 indicates that no
-- default was set by the binder.
Default_Sec_Stack_Size : Int := -1;
-- GNATBIND
-- Set to default secondary stack size in units of bytes. Set by
-- the -Dnnn switch for the binder. A value of -1 indicates that no
-- default was set by the binder, and that the default should be the
-- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
Detect_Blocking : Boolean := False;
-- GNAT
-- Set True to force the run time to raise Program_Error if calls to
-- potentially blocking operations are detected from protected actions.
Display_Compilation_Progress : Boolean := False;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- Set True (-d switch) to display information on progress while compiling
-- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
type Distribution_Stub_Mode_Type is
-- GNAT
(No_Stubs,
-- Normal mode, no generation/compilation of distribution stubs
Generate_Receiver_Stub_Body,
-- The unit being compiled is the RCI body, and the compiler will
-- generate the body for the receiver stubs and compile it.
Generate_Caller_Stub_Body);
-- The unit being compiled is the RCI spec, and the compiler will
-- generate the body for the caller stubs and compile it.
Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
-- GNAT
-- This enumeration variable indicates the five states of distribution
-- annex stub generation/compilation.
Do_Not_Execute : Boolean := False;
-- GNATMAKE
-- Set to True if no actual compilations should be undertaken.
Dump_Source_Text : Boolean := False;
-- GNAT
-- Set to True (by -gnatL) to dump source text intermingled with generated
-- code. Effective only if either of Debug/Print_Generated_Code is true.
Dynamic_Elaboration_Checks : Boolean := False;
-- GNAT
-- Set True for dynamic elaboration checking mode, as set by the -gnatE
-- switch or by the use of pragma Elaboration_Checks (Dynamic).
Dynamic_Stack_Measurement : Boolean := False;
-- GNATBIND
-- Set True to enable dynamic stack measurement (-u flag for gnatbind)
Dynamic_Stack_Measurement_Array_Size : Nat := 100;
-- GNATBIND
-- Number of measurements we want to store during dynamic stack analysis.
-- When the buffer is full, non-storable results will be output on the fly.
-- The value is relevant only if Dynamic_Stack_Measurement is set. Set
-- by processing of -u flag for gnatbind.
Elab_Dependency_Output : Boolean := False;
-- GNATBIND
-- Set to True to output complete list of elaboration constraints
Elab_Order_Output : Boolean := False;
-- GNATBIND
-- Set to True to output chosen elaboration order
Elab_Warnings : Boolean := False;
-- GNAT
-- Set to True to generate full elaboration warnings (-gnatwl)
Enable_Overflow_Checks : Boolean := False;
-- GNAT
-- Set to True if -gnato (enable overflow checks) switch is set,
-- but not -gnatp.
Error_Msg_Line_Length : Nat := 0;
-- GNAT
-- Records the error message line length limit. If this is set to zero,
-- then we get the old style behavior, in which each call to the error
-- message routines generates one line of output as a separate message.
-- If it is set to a non-zero value, then continuation lines are folded
-- to make a single long message, and then this message is split up into
-- multiple lines not exceeding the specified length. Set by -gnatj=nn.
Exception_Handler_Encountered : Boolean := False;
-- GNAT
-- This flag is set true if the parser encounters an exception handler.
-- It is used to set Warn_On_Exception_Propagation True if the restriction
-- No_Exception_Propagation is set.
Exception_Locations_Suppressed : Boolean := False;
-- GNAT
-- This flag is set True if a Suppress_Exception_Locations configuration
-- pragma is currently active.
type Exception_Mechanism_Type is
-- Determines the handling of exceptions. See Exp_Ch11 for details
--
(Front_End_Setjmp_Longjmp_Exceptions,
-- Exceptions use setjmp/longjmp generated explicitly by the
-- front end (this includes gigi or other equivalent parts of
-- the code generator). AT END handlers are converted into
-- exception handlers by the front end in this mode.
Back_End_Exceptions);
-- Exceptions are handled by the back end. The front end simply
-- generates the handlers as they appear in the source, and AT
-- END handlers are left untouched (they are not converted into
-- exception handlers when operating in this mode.
pragma Convention (C, Exception_Mechanism_Type);
Exception_Mechanism : Exception_Mechanism_Type :=
Front_End_Setjmp_Longjmp_Exceptions;
-- GNAT
-- Set to the appropriate value depending on the default as given in
-- system.ads (ZCX_By_Default, GCC_ZCX_Support).
-- The C convention is there to make this variable accessible to gigi.
Exception_Tracebacks : Boolean := False;
-- GNATBIND
-- Set to True to store tracebacks in exception occurrences (-E)
Extensions_Allowed : Boolean := False;
-- GNAT
-- Set to True by switch -gnatX if GNAT specific language extensions
-- are allowed. For example, the use of 'Constrained with objects of
-- generic types is a GNAT extension.
type External_Casing_Type is (
As_Is, -- External names cased as they appear in the Ada source
Uppercase, -- External names forced to all uppercase letters
Lowercase); -- External names forced to all lowercase letters
External_Name_Imp_Casing : External_Casing_Type := Lowercase;
-- GNAT
-- The setting of this flag determines the casing of external names
-- when the name is implicitly derived from an entity name (i.e. either
-- no explicit External_Name or Link_Name argument is used, or, in the
-- case of extended DEC pragmas, the external name is given using an
-- identifier. The As_Is setting is not permitted here (since this would
-- create Ada source programs that were case sensitive).
External_Name_Exp_Casing : External_Casing_Type := As_Is;
-- GNAT
-- The setting of this flag determines the casing of an external name
-- specified explicitly with a string literal. As_Is means the string
-- literal is used as given with no modification to the casing. If
-- Lowercase or Uppercase is set, then the string is forced to all
-- lowercase or all uppercase letters as appropriate. Note that this
-- setting has no effect if the external name is given using an identifier
-- in the case of extended DEC import/export pragmas (in this case the
-- casing is controlled by External_Name_Imp_Casing), and also has no
-- effect if an explicit Link_Name is supplied (a link name is always
-- used exactly as given).
External_Unit_Compilation_Allowed : Boolean := False;
-- GNATMAKE
-- When True (set by gnatmake switch -x), allow compilation of sources
-- that are not part of any project file.
Fast_Math : Boolean := False;
-- GNAT
-- Indicates the current setting of Fast_Math mode, as set by the use
-- of a Fast_Math pragma (set on by Fast_Math (On)).
Float_Format : Character := ' ';
-- GNAT
-- A non-blank value indicates that a Float_Format pragma has been
-- processed, in which case this variable is set to 'I' for IEEE or
-- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
-- versions of GNAT.
Float_Format_Long : Character := ' ';
-- GNAT
-- A non-blank value indicates that a Long_Float pragma has been
-- processed (this pragma is recognized only in OpenVMS versions
-- of GNAT), in which case this variable is set to D or G for
-- D_Float or G_Float.
Force_ALI_Tree_File : Boolean := False;
-- GNAT
-- Force generation of ALI file even if errors are encountered.
-- Also forces generation of tree file if -gnatt is also set.
Force_Checking_Of_Elaboration_Flags : Boolean := False;
-- GNATBIND
-- True if binding with forced checking of the elaboration flags
-- (-F switch set).
Force_Compilations : Boolean := False;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- Set to force recompilations even when the objects are up-to-date.
Full_Path_Name_For_Brief_Errors : Boolean := False;
-- PROJECT MANAGER
-- When True, in Brief_Output mode, each error message line
-- will start with the full path name of the source.
-- When False, only the file name without directory information
-- is used.
Full_List : Boolean := False;
-- GNAT
-- Set True to generate full source listing with embedded errors
Full_List_File_Name : String_Ptr := null;
-- GNAT
-- Set to file name to generate full source listing to named file (or if
-- the name is of the form .xxx, then to name.xxx where name is the source
-- file name with extension stripped.
Generate_Processed_File : Boolean := False;
-- GNAT
-- True when switch -gnateG is used. When True, create in a file
-- .prep, if the source is preprocessed.
Generating_Code : Boolean := False;
-- GNAT
-- True if the frontend finished its work and has called the backend to
-- process the tree and generate the object file.
Global_Discard_Names : Boolean := False;
-- GNAT, GNATBIND
-- True if a pragma Discard_Names appeared as a configuration pragma for
-- the current compilation unit.
GNAT_Mode : Boolean := False;
-- GNAT
-- True if compiling in GNAT system mode (-gnatg switch)
HLO_Active : Boolean := False;
-- GNAT
-- True if High Level Optimizer is activated (-gnatH switch)
Identifier_Character_Set : Character;
-- GNAT
-- This variable indicates the character set to be used for identifiers.
-- The possible settings are:
-- '1' Latin-5 (ISO-8859-1)
-- '2' Latin-5 (ISO-8859-2)
-- '3' Latin-5 (ISO-8859-3)
-- '4' Latin-5 (ISO-8859-4)
-- '5' Latin-5 (ISO-8859-5, Cyrillic)
-- '9' Latin-5 (ISO-8859-9)
-- 'p' PC (US, IBM page 437)
-- '8' PC (European, IBM page 850)
-- 'f' Full upper set (all distinct)
-- 'n' No upper characters (Ada 83 rules)
-- 'w' Latin-1 plus wide characters allowed in identifiers
--
-- The setting affects the set of letters allowed in identifiers and the
-- upper/lower case equivalences. It does not affect the interpretation of
-- character and string literals, which are always stored using the actual
-- coding in the source program. This variable is initialized to the
-- default value appropriate to the system (in Osint.Initialize), and then
-- reset if a command line switch is used to change the setting.
Ignore_Rep_Clauses : Boolean := False;
-- GNAT
-- Set True to ignore all representation clauses. Useful when compiling
-- code from foreign compilers for checking or ASIS purposes. Can be
-- set True by use of -gnatI.
Implementation_Unit_Warnings : Boolean := True;
-- GNAT
-- Set True to active warnings for use of implementation internal units.
-- Can be controlled by use of -gnatwi/-gnatwI.
Implicit_Packing : Boolean := False;
-- GNAT
-- If set True, then a Size attribute clause on an array is allowed to
-- cause implicit packing instead of generating an error message. Set by
-- use of pragma Implicit_Packing.
Ineffective_Inline_Warnings : Boolean := False;
-- GNAT
-- Set True to activate warnings if front-end inlining (-gnatN) is not
-- able to actually inline a particular call (or all calls). Can be
-- controlled by use of -gnatwp/-gnatwP.
Init_Or_Norm_Scalars : Boolean := False;
-- GNAT, GANTBIND
-- Set True if a pragma Initialize_Scalars applies to the current unit.
-- Also set True if a pragma Normalize_Scalars applies.
Initialize_Scalars : Boolean := False;
-- GNAT
-- Set True if a pragma Initialize_Scalars applies to the current unit.
-- Note that Init_Or_Norm_Scalars is also set to True if this is True.
Initialize_Scalars_Mode1 : Character := 'I';
Initialize_Scalars_Mode2 : Character := 'N';
-- GNATBIND
-- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
-- is IN (invalid values), used if no -S switch is used.
Inline_Active : Boolean := False;
-- GNAT
-- Set True to activate pragma Inline processing across modules. Default
-- for now is not to inline across module boundaries.
Interface_Library_Unit : Boolean := False;
-- GNATBIND
-- Set to True to indicate that at least one ALI file is an interface ALI:
-- then elaboration flag checks are to be generated in the binder
-- generated file.
Inspector_Mode : Boolean renames Debug.Debug_Flag_Dot_II;
-- GNAT
-- True if compiling in inspector mode (-gnatd.I switch).
-- Enable inspector mode, in particular SCIL generation.
-- When VM_Target /= None, the compiler will also attempt to
-- generate code even in case of unsupported construct instead of
-- displaying an error.
Invalid_Value_Used : Boolean := False;
-- GNAT
-- Set True if a valid Invalid_Value attribute is encountered
Follow_Links_For_Files : Boolean := False;
-- PROJECT MANAGER
-- Set to True (-eL) to process the project files in trusted mode
-- If Follow_Links is False, it is assumed that the project doesn't contain
-- any file duplicated through symbolic links (although the latter are
-- still valid if they point to a file which is outside of the project),
-- and that no directory has a name which is a valid source name.
Follow_Links_For_Dirs : Boolean := True;
-- PROJECT MANAGER
-- Whether directories can be links in this project, and therefore
-- additional system calls should be performed to ensure we always see the
-- same full name for each directory.
Front_End_Inlining : Boolean := False;
-- GNAT
-- Set True to activate inlining by front-end expansion
Inline_Processing_Required : Boolean := False;
-- GNAT
-- Set True if inline processing is required. Inline processing is
-- required if an active Inline pragma is processed. The flag is set
-- for a pragma Inline or Inline_Always that is actually active.
In_Place_Mode : Boolean := False;
-- GNATMAKE
-- Set True to store ALI and object files in place i.e. in the object
-- directory if these files already exist or in the source directory
-- if not.
Keep_Going : Boolean := False;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- When True signals to ignore compilation errors and keep
-- processing sources until there is no more work.
Keep_Temporary_Files : Boolean := False;
-- GNATCMD
-- When True the temporary files created by the GNAT driver are not
-- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
Leap_Seconds_Support : Boolean := False;
-- GNATBIND
-- Set to True to enable leap seconds support in Ada.Calendar and its
-- children.
Link_Only : Boolean := False;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- Set to True to skip compile and bind steps
-- (except when Bind_Only is set to True).
List_Restrictions : Boolean := False;
-- GNATBIND
-- Set to True to list restrictions pragmas that could apply to partition
List_Units : Boolean := False;
-- GNAT
-- List units in the active library for a compilation (-gnatu switch)
List_Closure : Boolean := False;
-- GNATBIND
-- List all sources in the closure of a main (-R gnatbind switch)
List_Dependencies : Boolean := False;
-- GNATMAKE
-- When True gnatmake verifies that the objects are up to date and
-- outputs the list of object dependencies (-M switch).
-- Output depends if -a switch is used or not.
-- This list can be used directly in a Makefile.
List_Representation_Info : Int range 0 .. 3 := 0;
-- GNAT
-- Set non-zero by -gnatR switch to list representation information.
-- The settings are as follows:
--
-- 0 = no listing of representation information (default as above)
-- 1 = list rep info for user defined record and array types
-- 2 = list rep info for all user defined types and objects
-- 3 = like 2, but variable fields are decoded symbolically
List_Representation_Info_To_File : Boolean := False;
-- GNAT
-- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
-- to be written to file.rep (where file is the name of the source
-- file) instead of stdout. For example, if file x.adb is compiled
-- using -gnatR2s then representation info is written to x.adb.ref.
List_Representation_Info_Mechanisms : Boolean := False;
-- GNAT
-- Set true by -gnatRm switch. Causes information on mechanisms to
-- be included in the representation output information.
List_Preprocessing_Symbols : Boolean := False;
-- GNAT, GNATPREP
-- Set to True if symbols for preprocessing a source are to be listed
-- before preprocessing occurs. Set to True by switch -s of gnatprep
-- or -s in preprocessing data file for the compiler.
type Create_Repinfo_File_Proc is access procedure (Src : String);
type Write_Repinfo_Line_Proc is access procedure (Info : String);
type Close_Repinfo_File_Proc is access procedure;
-- Types used for procedure addresses below
Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
-- GNAT
-- These three locations are left null when operating in non-compiler
-- (e.g. ASIS mode), but when operating in compiler mode, they are
-- set to point to the three corresponding procedures in Osint-C. The
-- reason for this slightly strange interface is to prevent Repinfo
-- from dragging in Osint in ASIS mode, which would include a lot of
-- unwanted units in the ASIS build.
type Create_List_File_Proc is access procedure (S : String);
type Write_List_Info_Proc is access procedure (S : String);
type Close_List_File_Proc is access procedure;
-- Types used for procedure addresses below
Create_List_File_Access : Create_List_File_Proc := null;
Write_List_Info_Access : Write_List_Info_Proc := null;
Close_List_File_Access : Close_List_File_Proc := null;
-- GNAT
-- These three locations are left null when operating in non-compiler
-- (e.g. from the binder), but when operating in compiler mode, they are
-- set to point to the three corresponding procedures in Osint-C. The
-- reason for this slightly strange interface is to prevent Repinfo
-- from dragging in Osint-C in the binder, which would include unwanted
-- units in the binder.
Locking_Policy : Character := ' ';
-- GNAT, GNATBIND
-- Set to ' ' for the default case (no locking policy specified).
-- Reset to first character (uppercase) of locking policy name if a
-- valid pragma Locking_Policy is encountered.
Locking_Policy_Sloc : Source_Ptr := No_Location;
-- GNAT, GNATBIND
-- Remember location of previous Locking_Policy pragma. This is used
-- for inconsistency error messages. A value of System_Location is
-- used if the policy is set in package System.
Look_In_Primary_Dir : Boolean := True;
-- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
-- Set to False if a -I- was present on the command line.
-- When True we are allowed to look in the primary directory to locate
-- other source or library files.
Make_Steps : Boolean := False;
-- GNATMAKE
-- Set to True when either Compile_Only, Bind_Only or Link_Only is
-- set to True.
Main_Index : Int := 0;
-- GNATMAKE
-- This is set to non-zero by gnatmake switch -eInnn to indicate that
-- the main program is the nnn unit in a multi-unit source file.
Mapping_File_Name : String_Ptr := null;
-- GNAT
-- File name of mapping between unit names, file names and path names.
-- (given by switch -gnatem)
Maximum_Messages : Int := 9999;
-- GNAT, GNATBIND
-- Maximum default number of errors before compilation is terminated, or in
-- the case of GNAT, maximum number of warnings before further warnings are
-- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
Maximum_File_Name_Length : Int;
-- GNAT, GNATBIND
-- Maximum number of characters allowed in a file name, not counting the
-- extension, as set by the appropriate switch. If no switch is given,
-- then this value is initialized by Osint to the appropriate value.
Maximum_Processes : Positive := 1;
-- GNATMAKE, GPRMAKE, GPRBUILD
-- Maximum number of processes that should be spawned to carry out
-- compilations.
Minimal_Recompilation : Boolean := False;
-- GNATMAKE
-- Set to True if minimal recompilation mode requested
Special_Exception_Package_Used : Boolean := False;
-- GNAT
-- Set to True if either of the unit GNAT.Most_Recent_Exception or
-- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
-- local raise statements into gotos in the presence of either package.
Multiple_Unit_Index : Int;
-- GNAT
-- This is set non-zero if the current unit is being compiled in multiple
-- unit per file mode, meaning that the current unit is selected from the
-- sequence of units in the current source file, using the value stored
-- in this variable (e.g. 2 = select second unit in file). A value of
-- zero indicates that we are in normal (one unit per file) mode.
No_Main_Subprogram : Boolean := False;
-- GNATMAKE, GNATBIND
-- Set to True if compilation/binding of a program without main
-- subprogram requested.
No_Run_Time_Mode : Boolean := False;
-- GNAT, GNATBIND
-- This flag is set True if a No_Run_Time pragma is encountered. See
-- spec of Rtsfind for a full description of handling of this pragma.
No_Stdinc : Boolean := False;
-- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
-- Set to True if no default source search dirs added to search list
No_Stdlib : Boolean := False;
-- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
-- Set to True if no default library search dirs added to search list
No_Strict_Aliasing : Boolean := False;
-- GNAT
-- Set True if pragma No_Strict_Aliasing with no parameters encountered
Normalize_Scalars : Boolean := False;
-- GNAT, GNATBIND
-- Set True if a pragma Normalize_Scalars applies to the current unit.
-- Note that Init_Or_Norm_Scalars is also set to True if this is True.
Object_Directory_Present : Boolean := False;
-- GNATMAKE
-- Set to True when an object directory is specified with option -D
type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
Operating_Mode : Operating_Mode_Type := Generate_Code;
-- GNAT
-- Indicates the operating mode of the compiler. The default is generate
-- code, which runs the parser, semantics and backend. Switches can be
-- used to set syntax checking only mode, or syntax and semantics checking
-- only mode. Operating_Mode can also be modified as a result of detecting
-- errors during the compilation process. In particular if any serious
-- error is detected then this flag is reset from Generate_Code to
-- Check_Semantics after generating an error message.
Optimize_Alignment : Character := 'O';
-- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
-- be modified by use of pragma Optimize_Alignment.
Optimize_Alignment_Local : Boolean := False;
-- Set True if Optimize_Alignment mode is set by a local configuration
-- pragma that overrides the gnat.adc (or other configuration file) default
-- so that the unit is not dependent on the default setting. Also always
-- set True for internal units, since these always have a default setting
-- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
-- them all having such an explicit pragma in each unit).
Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
-- GNAT
-- Indicates the original operating mode of the compiler as set by
-- compiler options. This is identical to Operating_Mode except that
-- this is not affected by errors.
Optimization_Level : Int;
pragma Import (C, Optimization_Level, "optimize");
-- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
-- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
-- GNAAMP back ends.
Optimize_Size : Int;
pragma Import (C, Optimize_Size, "optimize_size");
-- Constant reflecting setting of -Os (optimize for size). Set to nonzero
-- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
-- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
Output_File_Name_Present : Boolean := False;
-- GNATBIND, GNAT, GNATMAKE, GPRMAKE
-- Set to True when the output C file name is given with option -o for
-- GNATBIND, when the object file name is given with option -gnatO for GNAT
-- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
Output_Linker_Option_List : Boolean := False;
-- GNATBIND
-- True if output of list of linker options is requested (-K switch set)
Output_Object_List : Boolean := False;
-- GNATBIND
-- True if output of list of objects is requested (-O switch set)
Overflow_Checks_Unsuppressed : Boolean := False;
-- GNAT
-- Set to True if at least one pragma Unsuppress
-- (All_Checks|Overflow_Checks) has been processed.
Persistent_BSS_Mode : Boolean := False;
-- GNAT
-- True if a Persistent_BSS configuration pragma is in effect, causing
-- potentially persistent data to be placed in the persistent_bss section.
Pessimistic_Elab_Order : Boolean := False;
-- GNATBIND
-- True if pessimistic elaboration order is to be chosen (-p switch set)
Polling_Required : Boolean := False;
-- GNAT
-- Set to True if polling for asynchronous abort is enabled by using
-- the -gnatP option for GNAT.
Preprocessing_Data_File : String_Ptr := null;
-- GNAT
-- Set by switch -gnatep=. The file name of the preprocessing data file.
Print_Generated_Code : Boolean := False;
-- GNAT
-- Set to True to enable output of generated code in source form. This
-- flag is set by the -gnatG switch.
Print_Standard : Boolean := False;
-- GNAT
-- Set to true to enable printing of package standard in source form.
-- This flag is set by the -gnatS switch
Propagate_Exceptions : Boolean := False;
-- GNAT
-- Indicates if subprogram descriptor exception tables should be
-- built for imported subprograms. Set True if a Propagate_Exceptions
-- pragma applies to the extended main unit.
type Usage is (Unknown, Not_In_Use, In_Use);
Project_File_In_Use : Usage := Unknown;
-- GNAT
-- Indicates if a project file is used or not.
-- Set to In_Use by the first SFNP pragma.
Queuing_Policy : Character := ' ';
-- GNAT, GNATBIND
-- Set to ' ' for the default case (no queuing policy specified).
-- Reset to first character (uppercase) of locking policy name if a valid
-- Queuing_Policy pragma is encountered.
Queuing_Policy_Sloc : Source_Ptr := No_Location;
-- GNAT, GNATBIND
-- Remember location of previous Queuing_Policy pragma. This is used
-- for inconsistency error messages. A value of System_Location is
-- used if the policy is set in package System.
Quiet_Output : Boolean := False;
-- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
-- Set to True if the tool should not have any output if there are no
-- errors or warnings.
Replace_In_Comments : Boolean := False;
-- GNATPREP
-- Set to True if -C switch used
RTS_Lib_Path_Name : String_Ptr := null;
RTS_Src_Path_Name : String_Ptr := null;
-- GNAT
-- Set to the "adalib" and "adainclude" directories of the run time
-- specified by --RTS=.
RTS_Switch : Boolean := False;
-- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
-- Set to True when the --RTS switch is set
Run_Path_Option : Boolean := True;
-- GNATMAKE, GNATLINK
-- Set to False when no run_path_option should be issued to the linker
Search_Directory_Present : Boolean := False;
-- GNAT
-- Set to True when argument is -I. Reset to False when next argument,
-- a search directory path is taken into account. Note that this is
-- quite different from other switches in this section in that it is
-- only set in a transitory manner as a result of scanning a -I switch
-- with no file name, and if set, is an indication that the next argument
-- is to be treated as a file name.
Sec_Stack_Used : Boolean := False;
-- GNAT, GBATBIND
-- Set True if generated code uses the System.Secondary_Stack package.
-- For the binder, set if any unit uses the secondary stack package.
Setup_Projects : Boolean := False;
-- GNAT DRIVER
-- Set to True for GNAT SETUP: the Project Manager creates non existing
-- object, library and exec directories.
Shared_Libgnat : Boolean;
-- GNATBIND
-- Set to True if a shared libgnat is requested by using the -shared
-- option for GNATBIND and to False when using the -static option. The
-- value of this flag is set by Gnatbind.Scan_Bind_Arg.
Sprint_Line_Limit : Nat := 72;
-- Limit values for chopping long lines in Sprint output, can be reset
-- by use of NNN parameter with -gnatG or -gnatD switches.
Stack_Checking_Enabled : Boolean;
-- GNAT
-- Set to indicate if -fstack-check switch is set for the compilation. True
-- means that the switch is set, so that stack checking is enabled. False
-- means that the switch is not set (no stack checking). This value is
-- obtained from the external imported value flag_stack_check in the gcc
-- backend (see Frontend) and may be referenced throughout the compilation
-- phases.
Style_Check : Boolean := False;
-- GNAT
-- Set True to perform style checks. Activates checks carried out
-- in package Style (see body of this package for details of checks)
-- This flag is set True by either the -gnatg or -gnaty switches.
Suppress_All_Inlining : Boolean := False;
-- GNAT
-- Set by -fno-inline. Suppresses all inlining, both front end and back end
-- regardless of any other switches that are set.
Suppress_Control_Flow_Optimizations : Boolean := False;
-- GNAT
-- Set by -fpreserve-control-flow. Suppresses control flow optimizations
-- that interfere with coverage analysis based on the object code.
System_Extend_Pragma_Arg : Node_Id := Empty;
-- GNAT
-- Set non-empty if and only if a correct Extend_System pragma was present
-- in which case it points to the argument of the pragma, and the name can
-- be located as Chars (Expression (System_Extend_Pragma_Arg)).
System_Extend_Unit : Node_Id := Empty;
-- GNAT
-- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
-- is never appropriate in GNAT_Mode (and causes troubles, including
-- bogus circularities, if we try to compile the run-time library with
-- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
-- is a copy of the value set in System_Extend_Pragma_Arg.
Subunits_Missing : Boolean := False;
-- GNAT
-- This flag is set true if missing subunits are detected with code
-- generation active. This causes code generation to be skipped.
Suppress_Checks : Boolean := False;
-- GNAT
-- Set to True if -gnatp (suppress all checks) switch present.
Suppress_Options : Suppress_Array;
-- GNAT
-- Flags set True to suppress corresponding check, i.e. add an implicit
-- pragma Suppress at the outer level of each unit compiled. Note that
-- these suppress actions can be overridden by the use of the Unsuppress
-- pragma. This variable is initialized by Osint.Initialize.
Suppress_Back_Annotation : Boolean := False;
-- GNAT
-- This flag is set True if back annotation of representation information
-- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
-- This avoids unnecessary time being spent on back annotation.
Table_Factor : Int := 1;
-- GNAT
-- Factor by which all initial table sizes set in Alloc are multiplied.
-- Used in Table to calculate initial table sizes (the initial table size
-- is the value in Alloc, used as the Table_Initial parameter value,
-- multiplied by the factor given here. The default value is used if no
-- -gnatT switch appears.
Task_Dispatching_Policy : Character := ' ';
-- GNAT, GNATBIND
-- Set to ' ' for the default case (no task dispatching policy specified).
-- Reset to first character (uppercase) of task dispatching policy name
-- if a valid Task_Dispatching_Policy pragma is encountered.
Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
-- GNAT, GNATBIND
-- Remember location of previous Task_Dispatching_Policy pragma. This is
-- used for inconsistency error messages. A value of System_Location is
-- used if the policy is set in package System.
Tasking_Used : Boolean := False;
-- Set True if any tasking construct is encountered. Used to activate the
-- output of the Q, L and T lines in ALI files.
Time_Slice_Set : Boolean := False;
-- GNATBIND
-- Set True if a pragma Time_Slice is processed in the main unit, or
-- if the -gnatTnn switch is present to set a time slice value.
Time_Slice_Value : Nat;
-- GNATBIND
-- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
-- Time_Slice pragma has been processed. Set to the time slice value in
-- microseconds. Negative values are stored as zero, and the value is not
-- larger than 1_000_000_000 (1000 seconds). Values larger than this are
-- reset to this maximum. This can also be set with the -gnatTnn switch.
Tolerate_Consistency_Errors : Boolean := False;
-- GNATBIND
-- Tolerate time stamp and other consistency errors. If this flag is set to
-- True (-t), then inconsistencies result in warnings rather than errors.
Treat_Restrictions_As_Warnings : Boolean := False;
-- GNAT
-- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
-- -gnatr switch.
Tree_Output : Boolean := False;
-- GNAT
-- Set to True (-gnatt) to generate output tree file
True_VMS_Target : Boolean := False;
-- Set True if we are on a VMS target. The setting of this flag reflects
-- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
-- can also be true when debug flag m is set (-gnatdm). This is used in the
-- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
Try_Semantics : Boolean := False;
-- GNAT
-- Flag set to force attempt at semantic analysis, even if parser errors
-- occur. This will probably cause blowups at this stage in the game. On
-- the other hand, most such blowups will be caught cleanly and simply
-- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
Undefined_Symbols_Are_False : Boolean := False;
-- GNAT, GNATPREP
-- Set to True by switch -u of gnatprep or -u in the preprocessing data
-- file for the compiler. Indicates that while preprocessing sources,
-- symbols that are not defined have the value FALSE.
Unique_Error_Tag : Boolean := Tag_Errors;
-- GNAT
-- Indicates if error messages are to be prefixed by the string error:
-- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
Universal_Addressing_On_AAMP : Boolean := False;
-- GNAAMP
-- Indicates if library-level objects should be accessed and updated using
-- universal addressing instructions on the AAMP architecture. This flag is
-- set to True when pragma Universal_Data is given as a configuration
-- pragma.
Unreserve_All_Interrupts : Boolean := False;
-- GNAT, GNATBIND
-- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
-- appears anywhere in the main unit for GNAT, or if any ALI file has the
-- corresponding attribute set in GNATBIND.
Upper_Half_Encoding : Boolean := False;
-- GNAT, GNATBIND
-- Normally set False, indicating that upper half ISO 8859-1 characters are
-- used in the normal way to represent themselves. If the wide character
-- encoding method uses the upper bit for this encoding, then this flag is
-- set True, and upper half characters in the source indicate the start of
-- a wide character sequence. Set by -gnatW or -W switches.
Usage_Requested : Boolean := False;
-- GNAT, GNATBIND, GNATMAKE
-- Set to True if -h (-gnath for the compiler) switch encountered
-- requesting usage information
Use_Pragma_Linker_Constructor : Boolean := False;
-- GNATBIND
-- True if pragma Linker_Constructor applies to adainit
Use_VADS_Size : Boolean := False;
-- GNAT
-- Set to True if a valid pragma Use_VADS_Size is processed
Validity_Checks_On : Boolean := True;
-- GNAT
-- This flag determines if validity checking is on or off. The initial
-- state is on, and the required default validity checks are active. The
-- actual set of checks that is performed if Validity_Checks_On is set is
-- defined by the switches in package Validsw. The Validity_Checks_On flag
-- is controlled by pragma Validity_Checks (On | Off), and also some
-- generated compiler code (typically code that has to do with validity
-- check generation) is compiled with this flag set to False. This flag is
-- set to False by the -gnatp switch.
Verbose_Mode : Boolean := False;
-- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
-- GPRMAKE, GPRBUILD, GPRCLEAN
-- Set to True to get verbose mode (full error message text and location
-- information sent to standard output, also header, copyright and summary)
type Verbosity_Level_Type is (None, Low, Medium, High);
Verbosity_Level : Verbosity_Level_Type := High;
-- GNATMAKE, GPRMAKE
-- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
-- the level of verbosity of informational messages:
--
-- In Low Verbosity, the reasons why a source is recompiled, the name
-- of the executable and the reason it must be rebuilt is output.
--
-- In Medium Verbosity, additional lines are output for each ALI file
-- that is checked.
--
-- In High Verbosity, additional lines are output when the ALI file
-- is part of an Ada library, is read-only or is part of the runtime.
Warn_On_Ada_2005_Compatibility : Boolean := True;
-- GNAT
-- Set to True to generate all warnings on Ada 2005 compatibility issues,
-- including warnings on Ada 2005 obsolescent features used in Ada 2005
-- mode. Set False by -gnatwY.
Warn_On_Parameter_Order : Boolean := False;
-- GNAT
-- Set to True to generate warnings for cases where the argument list for
-- a call is a sequence of identifiers that match the formal identifiers,
-- but are in the wrong order.
Warn_On_Assertion_Failure : Boolean := True;
-- GNAT
-- Set to True to activate warnings on assertions that can be determined
-- at compile time will always fail. Set false by -gnatw.A.
Warn_On_Assumed_Low_Bound : Boolean := True;
-- GNAT
-- Set to True to activate warnings for string parameters that are indexed
-- with literals or S'Length, presumably assuming a lower bound of one. Set
-- False by -gnatwW.
Warn_On_Bad_Fixed_Value : Boolean := False;
-- GNAT
-- Set to True to generate warnings for static fixed-point expression
-- values that are not an exact multiple of the small value of the type.
Warn_On_Biased_Representation : Boolean := True;
-- GNAT
-- Set to True to generate warnings for size clauses, component clauses
-- and component_size clauses that force biased representation. Set False
-- by -gnatw.B.
Warn_On_Constant : Boolean := False;
-- GNAT
-- Set to True to generate warnings for variables that could be declared
-- as constants. Modified by use of -gnatwk/K.
Warn_On_Deleted_Code : Boolean := False;
-- GNAT
-- Set to True to generate warnings for code deleted by the front end
-- for conditional statements whose outcome is known at compile time.
-- Modified by use of -gnatwt/T.
Warn_On_Dereference : Boolean := False;
-- GNAT
-- Set to True to generate warnings for implicit dereferences for array
-- indexing and record component access. Modified by use of -gnatwd/D.
Warn_On_Export_Import : Boolean := True;
-- GNAT
-- Set to True to generate warnings for suspicious use of export or
-- import pragmas. Modified by use of -gnatwx/X.
Warn_On_Hiding : Boolean := False;
-- GNAT
-- Set to True to generate warnings if a declared entity hides another
-- entity. The default is that this warning is suppressed.
Warn_On_Modified_Unread : Boolean := False;
-- GNAT
-- Set to True to generate warnings if a variable is assigned but is never
-- read. Also controls warnings for similar cases involving out parameters,
-- but only if there is only one out parameter for the procedure involved.
-- The default is that this warning is suppressed.
Warn_On_All_Unread_Out_Parameters : Boolean := False;
-- GNAT
-- Set to True to generate warnings in all cases where a variable is
-- modified by being passed as to an OUT formal, but the resulting value is
-- never read. The default is that this warning is suppressed, except in
-- the case of
Warn_On_No_Value_Assigned : Boolean := True;
-- GNAT
-- Set to True to generate warnings if no value is ever assigned to a
-- variable that is at least partially uninitialized. Set to false to
-- suppress such warnings. The default is that such warnings are enabled.
Warn_On_Non_Local_Exception : Boolean := False;
-- GNAT
-- Set to True to generate warnings for non-local exception raises and also
-- handlers that can never handle a local raise. This warning is only ever
-- generated if pragma Restrictions (No_Exception_Propagation) is set. The
-- default is not to generate the warnings except that if the source has
-- at least one exception handler, and this restriction is set, and the
-- warning was not explicitly turned off, then it is turned on by default.
No_Warn_On_Non_Local_Exception : Boolean := False;
-- GNAT
-- This is set to True if the above warning is explicitly suppressed. We
-- use this to avoid turning it on by default when No_Exception_Propagation
-- restriction is set and an exception handler is present.
Warn_On_Obsolescent_Feature : Boolean := False;
-- GNAT
-- Set to True to generate warnings on use of any feature in Annex or if a
-- subprogram is called for which a pragma Obsolescent applies.
Warn_On_Questionable_Missing_Parens : Boolean := True;
-- GNAT
-- Set to True to generate warnings for cases where parentheses are missing
-- and the usage is questionable, because the intent is unclear.
Warn_On_Redundant_Constructs : Boolean := False;
-- GNAT
-- Set to True to generate warnings for redundant constructs (e.g. useless
-- assignments/conversions). The default is that this warning is disabled.
Warn_On_Object_Renames_Function : Boolean := False;
-- GNAT
-- Set to True to generate warnings when a function result is renamed as
-- an object. The default is that this warning is disabled.
Warn_On_Reverse_Bit_Order : Boolean := True;
-- GNAT
-- Set to True to generate warning (informational) messages for component
-- clauses that are affected by non-standard bit-order. The default is
-- that this warning is enabled.
Warn_On_Unchecked_Conversion : Boolean := True;
-- GNAT
-- Set to True to generate warnings for unchecked conversions that may have
-- non-portable semantics (e.g. because sizes of types differ). The default
-- is that this warning is enabled.
Warn_On_Unrecognized_Pragma : Boolean := True;
-- GNAT
-- Set to True to generate warnings for unrecognized pragmas. The default
-- is that this warning is enabled.
Warn_On_Unrepped_Components : Boolean := False;
-- GNAT
-- Set to True to generate warnings for the case of components of record
-- which have a record representation clause but this component does not
-- have a component clause. The default is that this warning is disabled.
Warn_On_Warnings_Off : Boolean := False;
-- GNAT
-- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
-- where either the pragma is never used, or it could be replaced by a
-- pragma Unmodified or Unreferenced.
type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
Warning_Mode : Warning_Mode_Type := Normal;
-- GNAT, GNATBIND
-- Controls treatment of warning messages. If set to Suppress, warning
-- messages are not generated at all. In Normal mode, they are generated
-- but do not count as errors. In Treat_As_Error mode, warning messages
-- are generated and are treated as errors.
Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
-- GNAT, GNATBIND
-- Method used for encoding wide characters in the source program. See
-- description of type in unit System.WCh_Con for a list of the methods
-- that are currently supported. Note that brackets notation is always
-- recognized in source programs regardless of the setting of this
-- variable. The default setting causes only the brackets notation to be
-- recognized. If this is the main unit, this setting also controls the
-- output of the W=? parameter in the ALI file, which is used to provide
-- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
-- the value set here overrides this main unit default.
Wide_Character_Encoding_Method_Specified : Boolean := False;
-- GNAT, GNATBIND
-- Set True if the value in Wide_Character_Encoding_Method was set as
-- a result of an explicit -gnatW? or -W? switch. False otherwise.
Xref_Active : Boolean := True;
-- GNAT
-- Set if cross-referencing is enabled (i.e. xref info in ALI files)
Zero_Formatting : Boolean := False;
-- GNATBIND
-- Do no formatting (no title, no leading spaces, no empty lines) in
-- auxiliary outputs (-e, -K, -l, -R).
----------------------------
-- Configuration Settings --
----------------------------
-- These are settings that are used to establish the mode at the start of
-- each unit. The values defined below can be affected either by command
-- line switches, or by the use of appropriate configuration pragmas in a
-- configuration pragma file.
Ada_Version_Config : Ada_Version_Type;
-- GNAT
-- This is the value of the configuration switch for the Ada 83 mode, as
-- set by the command line switches -gnat83/95/05, and possibly modified by
-- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
-- to set the initial value for Ada_Version mode at the start of analysis
-- of a unit. Note however, that the setting of this flag is ignored for
-- internal and predefined units (which are always compiled in the most up
-- to date version of Ada).
Ada_Version_Explicit_Config : Ada_Version_Type;
-- GNAT
-- This is set in the same manner as Ada_Version_Config. The difference is
-- that the setting of this flag is not ignored for internal and predefined
-- units, which for some purposes do indeed access this value, regardless
-- of the fact that they are compiled the most up to date ada version).
Assertions_Enabled_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch for assertions enabled
-- mode, as possibly set by the command line switch -gnata, and possibly
-- modified by the use of the configuration pragma Assertion_Policy.
Assume_No_Invalid_Values_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch for assuming "no invalid
-- values enabled" mode, as possibly set by the command line switch
-- -gnatB, and possibly modified by the use of the configuration pragma
-- Assume_No_Invalid_Values.
Check_Policy_List_Config : Node_Id;
-- GNAT
-- This points to the list of N_Pragma nodes for Check_Policy pragmas
-- that are linked through the Next_Pragma fields, with the list being
-- terminated by Empty. The order is most recently processed first. This
-- list includes only those pragmas in configuration pragma files.
Debug_Pragmas_Enabled_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch for debug pragmas enabled
-- mode, as possibly set by the command line switch -gnata and possibly
-- modified by the use of the configuration pragma Debug_Policy.
Dynamic_Elaboration_Checks_Config : Boolean := False;
-- GNAT
-- Set True for dynamic elaboration checking mode, as set by the -gnatE
-- switch or by the use of pragma Elaboration_Checking (Dynamic).
Exception_Locations_Suppressed_Config : Boolean := False;
-- GNAT
-- Set True by use of the configuration pragma Suppress_Exception_Messages
Extensions_Allowed_Config : Boolean;
-- GNAT
-- This is the flag that indicates whether extensions are allowed. It can
-- be set True either by use of the -gnatX switch, or by use of the
-- configuration pragma Extensions_Allowed (On). It is always set to True
-- for internal GNAT units, since extensions are always permitted in such
-- units.
External_Name_Exp_Casing_Config : External_Casing_Type;
-- GNAT
-- This is the value of the configuration switch that controls casing of
-- external symbols for which an explicit external name is given. It can be
-- set to Uppercase by the command line switch -gnatF, and further modified
-- by the use of the configuration pragma External_Name_Casing in the
-- gnat.adc file. This flag is used to set the initial value for
-- External_Name_Exp_Casing at the start of analyzing each unit. Note
-- however that the setting of this flag is ignored for internal and
-- predefined units (which are always compiled with As_Is mode).
External_Name_Imp_Casing_Config : External_Casing_Type;
-- GNAT
-- This is the value of the configuration switch that controls casing of
-- external symbols where the external name is implicitly given. It can be
-- set to Uppercase by the command line switch -gnatF, and further modified
-- by the use of the configuration pragma External_Name_Casing in the
-- gnat.adc file. This flag is used to set the initial value for
-- External_Name_Imp_Casing at the start of analyzing each unit. Note
-- however that the setting of this flag is ignored for internal and
-- predefined units (which are always compiled with Lowercase mode).
Fast_Math_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that controls Fast_Math
-- mode, as set by a Fast_Math pragma in configuration pragmas. It is
-- used to set the initial value of Fast_Math at the start of each new
-- compilation unit.
Optimize_Alignment_Config : Character;
-- GNAT
-- This is the value of the configuration switch that controls the
-- alignment optimization mode, as set by an Optimize_Alignment pragma.
-- It is used to set the initial value of Optimize_Alignment at the start
-- of each new compilation unit, except that it is always set to 'O' (off)
-- for internal units.
Persistent_BSS_Mode_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that controls whether
-- potentially persistent data is to be placed in the persistent_bss
-- section. It can be set True by use of the pragma Persistent_BSS.
-- This flag is used to set the initial value of Persistent_BSS_Mode
-- at the start of each compilation unit, except that it is always
-- set False for predefined units.
Polling_Required_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that controls polling
-- mode. It can be set True by the command line switch -gnatP, and then
-- further modified by the use of pragma Polling in the gnat.adc file. This
-- flag is used to set the initial value for Polling_Required at the start
-- of analyzing each unit.
Use_VADS_Size_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that controls the use of
-- VADS_Size instead of Size wherever the attribute Size is used. It can
-- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
-- This flag is used to set the initial value for Use_VADS_Size at the
-- start of analyzing each unit. Note however that the setting of this flag
-- is ignored for internal and predefined units (which are always compiled
-- with the standard Size semantics).
type Config_Switches_Type is private;
-- Type used to save values of the switches set from Config values
procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
-- This procedure saves the current values of the switches which are
-- initialized from the above Config values, and then resets these switches
-- according to the Config value settings.
procedure Set_Opt_Config_Switches
(Internal_Unit : Boolean;
Main_Unit : Boolean);
-- This procedure sets the switches to the appropriate initial values. The
-- parameter Internal_Unit is True for an internal or predefined unit, and
-- affects the way the switches are set (see above). Main_Unit is true if
-- switches are being set for the main unit (this affects setting of the
-- assert/debug pragma switches, which are normally set false by default
-- for an internal unit, except when the internal unit is the main unit,
-- in which case we use the command line settings).
procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
-- This procedure restores a set of switch values previously saved by a
-- call to Save_Opt_Switches.
procedure Register_Opt_Config_Switches;
-- This procedure is called after processing the gnat.adc file and other
-- configuration pragma files to record the values of the Config switches,
-- as possibly modified by the use of command line switches and pragmas
-- appearing in these files.
------------------------
-- Other Global Flags --
------------------------
Expander_Active : Boolean := False;
-- A flag that indicates if expansion is active (True) or deactivated
-- (False). When expansion is deactivated all calls to expander routines
-- have no effect. Note that the initial setting of False is merely to
-- prevent saving of an undefined value for an initial call to the
-- Expander_Mode_Save_And_Set procedure. For more information on the use of
-- this flag, see package Expander. Indeed this flag might more logically
-- be in the spec of Expander, but it is referenced by Errout, and it
-- really seems wrong for Errout to depend on Expander.
Static_Dispatch_Tables : Boolean := True;
-- This flag indicates if the backend supports generation of statically
-- allocated dispatch tables. If it is True, then the front end will
-- generate static aggregates for dispatch tables that contain forward
-- references to addresses of subprograms not seen yet, and the back end
-- must be prepared to handle this case. If it is False, then the front
-- end generates assignments to initialize the dispatch table, and there
-- are no such forward references. By default we build statically allocated
-- dispatch tables for all library level tagged types in all platforms.This
-- behavior can be disabled using switch -gnatd.t which will set this flag
-- to False and revert to the previous dynamic behavior.
-----------------------
-- Tree I/O Routines --
-----------------------
procedure Tree_Read;
-- Reads switch settings from current tree file using Tree_Read
procedure Tree_Write;
-- Writes out switch settings to current tree file using Tree_Write
--------------------------
-- ASIS Version Control --
--------------------------
-- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
-- are supposed to be used in the GNAT/ASIS version check performed in
-- the ASIS code (this package is also a part of the ASIS implementation).
-- They are set by Tree_Read procedure, so they represent the version
-- number (and the version string) of the compiler which has created the
-- tree, and they are supposed to be compared with the corresponding values
-- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
-- implementation.
Tree_Version_String : String_Access;
-- Used to store the compiler version string read from a tree file to check
-- if it is from the same date as stored in the version string in Gnatvsn.
-- We require that ASIS Pro can be used only with GNAT Pro, but we allow
-- non-Pro ASIS and ASIS-based tools to be used with any version of the
-- GNAT compiler. Therefore, we need the possibility to compare the dates
-- of the corresponding source sets, using version strings that may be
-- of different lengths.
Tree_ASIS_Version_Number : Int;
-- Used to store the ASIS version number read from a tree file to check if
-- it is the same as stored in the ASIS version number in Tree_IO.
private
-- The following type is used to save and restore settings of switches in
-- Opt that represent the configuration (i.e. result of config pragmas).
-- Note that Ada_Version_Explicit is not included, since this is a sticky
-- flag that once set does not get reset, since the whole idea of this flag
-- is to record the setting for the main unit.
type Config_Switches_Type is record
Ada_Version : Ada_Version_Type;
Ada_Version_Explicit : Ada_Version_Type;
Assertions_Enabled : Boolean;
Assume_No_Invalid_Values : Boolean;
Check_Policy_List : Node_Id;
Debug_Pragmas_Enabled : Boolean;
Dynamic_Elaboration_Checks : Boolean;
Exception_Locations_Suppressed : Boolean;
Extensions_Allowed : Boolean;
External_Name_Exp_Casing : External_Casing_Type;
External_Name_Imp_Casing : External_Casing_Type;
Fast_Math : Boolean;
Optimize_Alignment : Character;
Optimize_Alignment_Local : Boolean;
Persistent_BSS_Mode : Boolean;
Polling_Required : Boolean;
Use_VADS_Size : Boolean;
end record;
-- The following declarations are for GCC version dependent flags. We do
-- not let client code in the compiler test GCC_Version directly, but
-- instead use deferred constants for relevant feature tags.
-- Note: there currently are no such constants defined in this section,
-- since the compiler front end is currently entirely independent of the
-- GCC version, which is a desirable state of affairs.
function get_gcc_version return Int;
pragma Import (C, get_gcc_version, "get_gcc_version");
GCC_Version : constant Nat := get_gcc_version;
-- GNATMAKE
-- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
-- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
end Opt;