------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- O P T --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2020, 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, 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 Hostparm; use Hostparm;
with Types; use Types;
pragma Warnings (Off);
-- This package is used also by gnatcoll
with System.Strings; use System.Strings;
with System.WCh_Con; use System.WCh_Con;
pragma Warnings (On);
package Opt is
----------------------
-- Checksum Control --
----------------------
-- Checksums are computed for sources to check for sources being the same
-- from a compilation point of view (e.g. spelling of identifiers and
-- white space layout do not count in this computation).
Checksum_Accumulate_Limited_Checksum : Boolean := False;
-- Used to control the computation of the limited view of a package.
-- (Not currently used, possible optimization for ALI files of units
-- in limited with_clauses).
----------------------------------------------
-- 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.
Latest_Ada_Only : Boolean := False;
-- If True, the only value valid for Ada_Version is Ada_Version_Type'Last,
-- trying to specify other values will be ignored (in case of pragma
-- Ada_xxx) or generate an error (in case of -gnat83/95/xx switches).
type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012, Ada_2020);
pragma Ordered (Ada_Version_Type);
pragma Convention (C, 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.
-- Think twice before using "="; Ada_Version >= Ada_2012 is more likely
-- what you want, because it will apply to future versions of the language.
-- WARNING: There is a matching C declaration of this type in fe.h
Ada_Version_Default : constant Ada_Version_Type := Ada_2012;
pragma Warnings (Off, Ada_Version_Default);
-- GNAT
-- Default Ada version if no switch given. The Warnings off is to kill
-- constant condition warnings.
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.
-- WARNING: There is a matching C declaration of this variable in fe.h
Ada_Version_Pragma : Node_Id := Empty;
-- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used
-- to specialize error messages complaining about the Ada version in use.
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 pragma Obsolescent) where we want the explicit version set.
Ada_Version_Runtime : Ada_Version_Type := Ada_2012;
-- 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. Modified by use of
-- -gnatwo/O.
Address_Is_Private : Boolean := False;
-- GNAT, GNATBIND
-- Set True if package System has the line "type Address is private;"
Aggregate_Individually_Assign : Boolean := False;
-- GNAT
-- Set True if record aggregates are to be always converted into assignment
-- statements. Set through the corresponding pragma.
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.
Allow_Integer_Address : Boolean := False;
-- GNAT
-- Allow use of integer expression in a context requiring System.Address.
-- Set by the use of configuration pragma Allow_Integer_Address. Also set
-- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used.
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.
Assertions_Enabled : Boolean := False;
-- GNAT
-- Indicates default policy (True = Check, False = Ignore) to be applied
-- to all assertion aspects and pragmas, and to pragma Debug, if there is
-- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma.
-- Set True by use of -gnata.
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
-- pragma Assume_No_Invalid_Values (On)), 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). It is also set true if certain
-- Unchecked_Conversion instantiations require checking based on annotated
-- values.
Back_End_Handles_Limited_Types : Boolean;
-- This flag is set true if the back end can properly handle limited or
-- other by reference types, and avoid copies. If this flag is False, then
-- the front end does special expansion for if/case expressions to make
-- sure that no copy occurs. If the flag is True, then the expansion for
-- if and case expressions relies on the back end properly handling things.
-- Currently the default is False for all cases (set in gnat1drv). The
-- default can be modified using -gnatd.L (sets the flag True). This is
-- used to test the possibility of having the backend handle this.
Back_End_Inlining : Boolean := False;
-- GNAT
-- Set True to activate inlining by back-end expansion. This is the normal
-- default mode for gcc targets, so it is True on such targets unless the
-- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the
-- exact conditions for setting this switch.
-- WARNING: There is a matching C declaration of this variable in fe.h
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, 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_Aliasing_Of_Parameters : Boolean := False;
-- GNAT
-- Set to True to detect whether subprogram parameters and function results
-- alias the same object(s).
Check_Float_Overflow : Boolean := False;
-- GNAT
-- Set to True to check that operations on predefined unconstrained float
-- types (e.g. Float, Long_Float) do not overflow and generate infinities
-- or invalid values. Set by the Check_Float_Overflow pragma, or by use
-- of the -gnateF switch.
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. Note
-- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
-- of this variable, implementing the required scope control for pragmas
-- appearing in a declarative part.
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, 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)
-- Modified by use of -gnatwu/U.
Check_Unreferenced_Formals : Boolean := False;
-- GNAT
-- Set to True to check for unreferenced formals. This is turned on by
-- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
Check_Validity_Of_Parameters : Boolean := False;
-- GNAT
-- Set to True to check for proper scalar initialization of subprogram
-- parameters on both entry and exit. This is turned on by -gnateV.
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.
-- Modified by use of -gnatwu/U.
CodePeer_Mode : Boolean := False;
-- GNAT, GNATBIND, GPRBUILD
-- Enable full CodePeer mode (SCIL generation, disable switches that
-- interact badly with it, etc...). This is turned on by -gnatC.
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.
Compilation_Time : String (1 .. 19);
-- GNAT
-- Compilation date and time in form YYYY-MM-DD HH:MM:SS
Compile_Only : Boolean := False;
-- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN
-- GNATMAKE, GPRBUILD:
-- set True to skip bind and link steps (except when Bind_Only is True)
-- GNATCLEAN, GPRCLEAN:
-- set True to delete only the files produced by the compiler but not the
-- library files or the executable files.
Compiler_Unit : Boolean := False;
-- GNAT1
-- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the
-- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays
-- True, since any units that are with'ed directly or indirectly by
-- a Compiler_Unit_Warning main unit are subject to the same restrictions.
-- Such units really should have their own pragmas, but we do not bother to
-- check for that, so this transitivity provides extra checking.
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_Time_On_Target is
-- 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. Modified by
-- use of -gnatwc/C.
Create_Mapping_File : Boolean := False;
-- GNATMAKE
-- Set to True (-C switch) to indicate that the compiler will be invoked
-- with a mapping file (-gnatem compiler switch).
subtype Debug_Level_Value is Nat range 0 .. 3;
Debugger_Level : Debug_Level_Value := 0;
-- GNAT, GNATBIND
-- The value given to the -g parameter. The default value for -g with
-- no value is 2. If no -g is specified, defaults to 0.
-- Note that the generated code should never depend on this variable,
-- since we want debug info to be nonintrusive on the generate code.
Default_Exit_Status : Int := 0;
-- GNATBIND
-- Set the default exit status value. Set by the -Xnnn switch for the
-- binder.
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.
-- WARNING: There is a matching C declaration of this variable in fe.h
Default_Pool : Node_Id := Empty;
-- GNAT
-- Used to record the storage pool name (or null literal) that is the
-- argument of an applicable pragma Default_Storage_Pool.
-- Empty: No pragma Default_Storage_Pool applies.
-- N_Null node: "pragma Default_Storage_Pool (null);" applies.
-- otherwise: "pragma Default_Storage_Pool (X);" applies, and
-- this points to the name X.
-- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value.
No_Stack_Size : constant := -1;
Default_Stack_Size : Int := No_Stack_Size;
-- GNATBIND
-- Set to default primary stack size in units of bytes. Set by the -dnnn
-- switch for the binder. A value of No_Stack_Size indicates that
-- no default was set by the binder.
Default_Sec_Stack_Size : Int := No_Stack_Size;
-- GNATBIND
-- Set to default secondary stack size in units of bytes. Set by the -Dnnn
-- switch for the binder. A value of No_Stack_Size indicates that no
-- default was set by the binder and the run-time value should be used
-- instead.
Default_SSO : Character := ' ';
-- GNAT
-- Set if a pragma Default_Scalar_Storage_Order has been given. The value
-- of ' ' indicates that no default has been set, otherwise the value is
-- either 'H' for High_Order_First or 'L' for Lower_Order_First.
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.
Directories_Must_Exist_In_Projects : Boolean := True;
-- PROJECT MANAGER
-- Set to False with switch -f of gnatclean and gprclean
Disable_FE_Inline : Boolean := False;
-- GNAT
-- Request to disable front end inlining from pragma Inline in the
-- presence of the -fno-inline back end flag on the command line,
-- regardless of any other switches that are set.
-- It remains the back end's reponsibility to honor -fno-inline at the
-- back end level.
Display_Compilation_Progress : Boolean := False;
-- GNATMAKE, 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 GNAT Studio).
type Distribution_Stub_Mode_Type is
-- GNAT
(No_Stubs,
-- Normal mode, no generation 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 three states of distribution
-- annex stub generation.
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_Info_Messages : Boolean := False;
-- GNAT
-- Set to True to output info messages for static elabmodel (-gnatel)
Elab_Warnings : Boolean := True;
-- GNAT
-- Set to True to generate elaboration warnings (-gnatwl). The warnings are
-- enabled by default because they carry the same importance as errors. The
-- compiler cannot emit actual errors because elaboration diagnostics need
-- dataflow analysis, which is not available. This behavior parallels that
-- of the old ABE mechanism.
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.
Error_To_Warning : Boolean := False;
-- GNAT
-- If True, then certain error messages (e.g. parameter overlap messages
-- for procedure calls in Ada 2012 mode) are treated as warnings instead
-- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning
-- will identify affected messages.
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_Extra_Info : Boolean := False;
-- GNAT
-- True when switch -gnateE is used. When True, generate extra information
-- associated with exception messages (in particular range and index
-- checks).
-- WARNING: There is a matching C declaration of this variable in fe.h
Exception_Locations_Suppressed : Boolean := False;
-- GNAT
-- Set to True if a Suppress_Exception_Locations configuration pragma is
-- currently active.
-- WARNING: There is a matching C declaration of this variable in fe.h
type Exception_Mechanism_Type is
-- Determines the kind of mechanism used to handle exceptions
--
(Front_End_SJLJ,
-- 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_ZCX,
-- 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). Propagation is performed
-- using a frame unwinding scheme and requires no particular setup code
-- at handler sites on regular execution paths.
Back_End_SJLJ);
-- Similar to Back_End_ZCX with respect to the front-end processing
-- of regular and AT-END handlers. A setjmp/longjmp scheme is used to
-- propagate and setup handler contexts on regular execution paths.
pragma Convention (C, Exception_Mechanism_Type);
-- WARNING: There is a matching C declaration of this type in fe.h
Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ;
-- GNAT
-- Set to the appropriate value depending on the flags in system.ads
-- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to
-- allow access by gigi.
-- WARNING: There is a matching C declaration of this variable in fe.h
function Back_End_Exceptions return Boolean;
function Front_End_Exceptions return Boolean;
function ZCX_Exceptions return Boolean;
function SJLJ_Exceptions return Boolean;
-- GNAT
-- Various properties of the active Exception_Mechanism
-- WARNING: There is a matching C declaration of these subprograms in fe.h
Exception_Tracebacks : Boolean := False;
-- GNATBIND
-- Set to True to store tracebacks in exception occurrences (-Ea or -E)
Exception_Tracebacks_Symbolic : Boolean := False;
-- GNATBIND
-- Set to True to store tracebacks in exception occurrences and enable
-- symbolic tracebacks (-Es).
Expand_Nonbinary_Modular_Ops : Boolean := False;
-- Set to True to convert nonbinary modular additions into code
-- that relies on the front-end expansion of operator Mod.
Extensions_Allowed : Boolean := False;
-- GNAT
-- Set to True by switch -gnatX if GNAT specific language extensions
-- are allowed. Currently there are no such defined extensions.
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 True by Fast_Math (On)).
Force_ALI_File : Boolean := False;
-- GNAT
-- Force generation of ALI file even if errors are encountered.
-- Set on by use of -gnatQ.
Disable_ALI_File : Boolean := False;
-- GNAT
-- Disable generation of ALI file
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 := False;
-- PROJECT MANAGER
-- Set to True if directories can be links in this project, and therefore
-- additional system calls must be performed to ensure that we always see
-- the same full name for each directory.
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, GPRBUILD
-- Set to force recompilations even when the objects are up-to-date.
Force_Elab_Order_File : String_Ptr := null;
-- GNATBIND
-- File name specified for -f switch (the forced elaboration order file)
Front_End_Inlining : Boolean := False;
-- GNAT
-- Set True to activate inlining by front-end expansion (even on GCC
-- targets, where inlining is normally handled by the back end). Set by
-- the flag -gnatN (which is now considered obsolescent, since the GCC
-- back end can do a better job of inlining than the front end these days).
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_C_Code : Boolean := False;
-- GNAT, GNATBIND
-- If True, the Cprint circuitry to generate C code output is activated.
-- Set True by use of -gnateg or -gnatd.V for GNAT, and -G for GNATBIND.
Generate_CodePeer_Messages : Boolean := False;
-- GNAT
-- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is
-- turned on by -gnateC.
Generate_Processed_File : Boolean := False;
-- GNAT
-- True when switch -gnateG is used. When True, create in a file
-- .prep, if the source is preprocessed.
Generate_SCIL : Boolean := False;
-- GNAT
-- Set True to activate SCIL code generation.
Generate_SCO : Boolean := False;
-- GNAT
-- True when switch -fdump-scos (or -gnateS) is used. When True, Source
-- Coverage Obligation (SCO) information is generated and output in the ALI
-- file. See unit Par_SCO for full details.
Generate_SCO_Instance_Table : Boolean := False;
-- GNAT
-- True when switch -fdump-scos is used. When True, a table of instances is
-- included in SCOs.
-- WARNING: There is a matching C declaration of this variable in fe.h
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.
type Ghost_Mode_Type is (None, Check, Ignore);
-- Possible legal modes that can be set by aspect/pragma Ghost as well as
-- value None, which indicates that no such aspect/pragma applies.
Ghost_Mode : Ghost_Mode_Type := None;
-- GNAT
-- The current Ghost mode in effect
Global_Discard_Names : Boolean := False;
-- GNAT, GNATBIND
-- True if a pragma Discard_Names appeared as a configuration pragma for
-- the current compilation unit.
GNAT_Encodings : Int;
pragma Import (C, GNAT_Encodings, "gnat_encodings");
-- Constant controlling the balance between GNAT encodings and standard
-- DWARF to emit in the debug information. It accepts the following values.
DWARF_GNAT_Encodings_All : constant Int := 0;
DWARF_GNAT_Encodings_GDB : constant Int := 1;
DWARF_GNAT_Encodings_Minimal : constant Int := 2;
Identifier_Character_Set : Character;
-- GNAT
-- This variable indicates the character set to be used for identifiers.
-- The possible settings are:
-- '1' Latin-1 (ISO-8859-1)
-- '2' Latin-2 (ISO-8859-2)
-- '3' Latin-3 (ISO-8859-3)
-- '4' Latin-4 (ISO-8859-4)
-- '5' Latin-Cyrillic (ISO-8859-5)
-- '9' Latin-9 (ISO-8859-15)
-- '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 purposes. Can be
-- set True by use of -gnatI.
Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False;
-- GNAT
-- Set True to ignore the semantics and effects of pragma SPARK_Mode when
-- the pragma appears inside an instance whose enclosing context is subject
-- to SPARK_Mode "off". This property applies to nested instances.
Ignore_Style_Checks_Pragmas : Boolean := False;
-- GNAT
-- Set True to ignore all Style_Checks pragmas. Can be set True by use
-- of -gnateY.
Ignore_Unrecognized_VWY_Switches : Boolean := False;
-- GNAT
-- Set True to ignore unrecognized y, V, w switches. Can be set True by
-- use of -gnateu, causing subsequent unrecognized switches to result in
-- a warning rather than an error.
Ignored_Ghost_Region : Node_Id := Empty;
-- GNAT
-- The start of the current ignored Ghost region. This value must always
-- reflect the starting node of the outermost ignored Ghost region. If a
-- nested ignored Ghost region is entered, the value must remain unchanged.
Implementation_Unit_Warnings : Boolean := True;
-- GNAT
-- Set True to active warnings for use of implementation internal units.
-- Modified 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.
Include_Subprogram_In_Messages : Boolean := False;
-- GNAT
-- Set True to include the enclosing subprogram in compiler messages.
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. Also set True to activate warnings if
-- frontend inlining is not able to inline a subprogram expected to
-- be inlined in GNATprove mode.
Init_Or_Norm_Scalars : Boolean := False;
-- GNAT, GNATBIND
-- Set True if a pragma Initialize_Scalars applies to the current unit.
-- Also set True if a pragma Restriction (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.
Inline_Level : Nat := 0;
-- GNAT
-- Set to indicate the inlining level: 0 means that an appropriate value is
-- to be computed by the compiler based on the optimization level (-gnatn),
-- 1 is for moderate inlining across modules (-gnatn1) and 2 for full
-- inlining across modules (-gnatn2).
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.
Invalid_Value_Used : Boolean := False;
-- GNAT
-- Set True if a valid Invalid_Value attribute is encountered
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, GPRBUILD
-- When True signals to ignore compilation errors and keep processing
-- sources until there is no more work.
Keep_Temporary_Files : Boolean := False;
-- GNATCMD, GNATMAKE, GPRBUILD
-- When True the temporary files are not deleted. Set by switches -dn or
-- --keep-temp-files.
Leap_Seconds_Support : Boolean := False;
-- GNATBIND
-- Set to True to enable leap seconds support in Ada.Calendar and its
-- children. Set by -y.
Legacy_Elaboration_Checks : Boolean := False;
-- GNAT
-- Set to True when the pre-18.x access-before-elaboration model is to be
-- used. Modified by use of -gnatH.
Legacy_Elaboration_Order : Boolean := False;
-- GNATBIND
-- Set to True when the pre-20.x elaboration-order model is to be used.
-- Modified by use of -H.
Link_Only : Boolean := False;
-- GNATMAKE, GPRBUILD
-- Set to True to skip compile and bind steps (except when Bind_Only is
-- set to True).
List_Body_Required_Info : Boolean := False;
-- GNATMAKE
-- List info messages about why a package requires a body. Modified by use
-- of -gnatw.y/.Y.
List_Inherited_Aspects : Boolean := False;
-- GNAT
-- List inherited invariants, preconditions, and postconditions from
-- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited
-- subtype predicates. Modified by use of -gnatw.l/.L.
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 or -Ra gnatbind switch)
List_Closure_All : Boolean := False;
-- GNATBIND
-- List all sources in closure of main including run-time units (-Ra
-- 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 .. 4 := 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
-- 4 = like 3, but list rep info for relevant compiler-generated types
-- WARNING: There is a matching C declaration of this variable in fe.h
List_Representation_Info_To_File : Boolean := False;
-- GNAT
-- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m 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_To_JSON : Boolean := False;
-- GNAT
-- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be
-- output in the JSON data interchange format.
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_Representation_Info_Extended : Boolean := False;
-- GNAT
-- Set true by -gnatRe switch. Causes extended information for record types
-- 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.
XDR_Stream : Boolean := False;
-- GNATBIND
-- Set to True to enable XDR in s-stratt.adb. Set by -xdr.
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 stop Repinfo from dragging in Osint in
-- ASIS mode, which would include lots of unwanted units in the ASIS build.
-- ??? Revisit this now that ASIS mode is gone.
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). Otherwise
-- set based on the pragma Locking_Policy:
-- Ceiling_Locking: 'C'
-- Concurrent_Readers_Locking: 'R'
-- Inheritance_Locking: 'I'
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_Instantiations : Int := 8000;
-- GNAT
-- Maximum number of instantiations permitted (to stop runaway cases
-- of nested instantiations). These situations probably only occur in
-- specially concocted test cases. Can be modified by -gnateinn switch.
Maximum_Processes : Positive := 1;
-- GNATMAKE, GPRBUILD
-- Maximum number of processes that should be spawned to carry out
-- compilations.
Minimal_Binder : Boolean := False;
-- GNATBIND
-- Set to True to suppress the generation of objects by the binder that
-- are not strictly required for a program to run. Intended for ZFP
-- applications that have tight memory constraints.
Minimal_Recompilation : Boolean := False;
-- GNATMAKE
-- Set to True if minimal recompilation mode requested
Minimize_Expression_With_Actions : Boolean := False;
-- GNAT
-- If True, minimize the use of N_Expression_With_Actions node.
-- This can be used in particular on some back-ends where this node is
-- difficult to support.
Modify_Tree_For_C : Boolean := False;
-- GNAT
-- If this switch is set True (currently it is set only by -gnatd.V), then
-- certain meaning-preserving transformations are applied to the tree to
-- make it easier to interface with back ends that implement C semantics.
-- There is a section in Sinfo which describes the transformations made.
Multiple_Unit_Index : Int := 0;
-- 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_Backup : Boolean := False;
-- GNATNAME
-- Do not create backup copies of project files. Set by switch --no-backup.
No_Component_Reordering : Boolean := False;
-- GNAT
-- Set True if pragma No_Component_Reordering with no parameter encountered
No_Deletion : Boolean := False;
-- GNATPREP
-- Set by preprocessor switch -a. Do not eliminate any source text. Implies
-- Undefined_Symbols_Are_False. Useful to perform a syntax check on all
-- branches of #if constructs.
No_Elab_Code_All_Pragma : Node_Id := Empty;
-- Set to point to a No_Elaboration_Code_All pragma or aspect encountered
-- in the spec of the extended main unit. Used to determine if we need to
-- do special tests for violation of this aspect.
No_Heap_Finalization_Pragma : Node_Id := Empty;
-- GNAT
-- Set to point to a No_Heap_Finalization pragma defined in a configuration
-- file.
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_Split_Units : Boolean := False;
-- GPRBUILD
-- Set to True with switch --no-split-units. When True, unit sources, spec,
-- body and subunits, must all be in the same project. This is checked
-- after each compilation.
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.
-- WARNING: There is a matching C declaration of this variable in fe.h
No_Tagged_Streams : Node_Id := Empty;
-- GNAT
-- If a pragma No_Tagged_Streams is active for the current scope, this
-- points to the corresponding pragma.
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
Object_Path_File_Name : String_Ptr := null;
-- GNAT2WHY
-- Path of the temporary file that contains a list of object directories
-- passed by -gnateO=.
One_Compilation_Per_Obj_Dir : Boolean := False;
-- GNATMAKE, GPRBUILD
-- Set to True with switch --single-compile-per-obj-dir. When True, there
-- cannot be simultaneous compilations with the object files in the same
-- object directory, if project files are used.
type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
pragma Ordered (Operating_Mode_Type);
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. This is an ordered
-- type with the semantics that each value does more than the previous one.
Optimize_Alignment : Character := 'O';
-- GNAT
-- 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;
-- GNAT
-- 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");
-- GNAT
-- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
Optimize_Size : Int;
pragma Import (C, Optimize_Size, "optimize_size");
-- GNAT
-- Constant reflecting setting of -Os (optimize for size). Set to nonzero
-- in -Os mode and set to zero otherwise.
Output_File_Name_Present : Boolean := False;
-- GNATBIND, GNAT, GNATMAKE
-- 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.
Output_Linker_Option_List : Boolean := False;
-- GNATBIND
-- True if output of list of linker options is requested (-K switch set)
Output_ALI_List : Boolean := False;
ALI_List_Filename : String_Ptr;
-- GNATBIND
-- True if output of list of ALIs is requested (-A switch set). List is
-- output under the given filename, or standard output if not specified.
Output_Object_List : Boolean := False;
Object_List_Filename : String_Ptr;
-- GNATBIND
-- True if output of list of objects is requested (-O switch set). List is
-- output under the given filename, or standard output if not specified.
Partition_Elaboration_Policy : Character := ' ';
-- GNAT, GNATBIND
-- Set to ' ' for the default case (no elaboration policy specified). Reset
-- to first character (uppercase) of locking policy name if a valid pragma
-- Partition_Elaboration_Policy is encountered.
Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location;
-- GNAT, GNATBIND
-- Remember location of previous Partition_Elaboration_Policy pragma. This
-- is used for inconsistency error messages. A value of System_Location is
-- used if the policy is set in package System.
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.
Prefix_Exception_Messages : Boolean := False;
-- GNAT
-- Set True to prefix exception messages with entity-name:
Preprocessing_Data_File : String_Ptr := null;
-- GNAT
-- Set by switch -gnatep=. The file name of the preprocessing data file.
Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4);
-- An extensible array to temporarily stores symbol definitions specified
-- on the command line with -gnateD switches. The value 4 is an arbitrary
-- starting point, if more space is needed it is allocated as required.
Preprocessing_Symbol_Last : Natural := 0;
-- Index of last symbol definition in array Symbol_Definitions
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
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.
Quantity_Of_Default_Size_Sec_Stacks : Int := -1;
-- GNATBIND
-- The number of default sized secondary stacks that the binder should
-- generate. Allows ZFP users to have the binder generate extra stacks if
-- needed to support multithreaded applications. A value of -1 indicates
-- that no size was set by the binder.
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, GPRBUILD, GPRCLEAN
-- Set to True if the tool should not have any output if there are no
-- errors or warnings.
Overriding_Renamings : Boolean := False;
-- GNAT
-- Set to True to enable compatibility mode with Rational compiler, and
-- to accept renamings of implicit operations in their own scope.
Relaxed_Elaboration_Checks : Boolean := False;
-- GNAT
-- Set to True to ignore certain elaboration scenarios, thus making the
-- current ABE mechanism more permissive. This behavior is applicable to
-- both the default and the legacy ABE models. Modified by use of -gnatJ.
Relaxed_RM_Semantics : Boolean := False;
-- GNAT
-- Set to True to ignore some Ada semantic error to help parse legacy Ada
-- code for use in e.g. static analysis (such as CodePeer). This deals
-- with cases where other compilers allow illegal constructs. Tools such as
-- CodePeer are interested in analyzing code rather than enforcing legality
-- rules, so as long as these illegal constructs end up with code that can
-- be handled by the tool in question, there is no reason to reject the
-- code that is considered correct by the other compiler.
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 nonexistent
-- 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.
Short_Circuit_And_Or : Boolean := False;
-- GNAT
-- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
type SPARK_Mode_Type is (None, Off, On);
-- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as
-- well as the value None, which indicates no such pragma/aspect applies.
SPARK_Mode : SPARK_Mode_Type := None;
-- GNAT
-- Current SPARK mode setting.
SPARK_Mode_Pragma : Node_Id := Empty;
-- GNAT
-- If the current SPARK_Mode (above) was set by a pragma, this records
-- the pragma that set this mode.
SPARK_Switches_File_Name : String_Ptr := null;
-- GNAT
-- Set to non-null file name by use of the -gnates switch to specify
-- SPARK (gnat2why) specific switches in the given file name.
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.
Sprint_Line_Limit : Nat := 72;
-- GNAT
-- Limit values for chopping long lines in Cprint/Sprint output, can be
-- reset by use of NNN parameter with -gnatG or -gnatD switches.
Stack_Checking_Enabled : Boolean := False;
-- GNAT
-- Set to indicate if stack checking is enabled for the compilation. This
-- is set directly from the value in the gcc back end in the body of the
-- gcc version of back_end.adb.
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 use of either the -gnatg or -gnaty switches, or
-- by the Style_Check pragma.
Style_Check_Main : Boolean := False;
-- GNAT
-- Set True if Style_Check was set for the main unit. This is used to
-- enable style checks for units in the main extended source that get
-- with'ed indirectly. It is set True by use of either the -gnatg or
-- -gnaty switches, but not by use of the Style_Checks pragma.
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.
-- WARNING: There is a matching C declaration of this variable in fe.h
Suppress_Options : Suppress_Record;
-- GNAT
-- Indicates outer level setting of check suppression. This initializes
-- the settings of the outer scope level in any unit compiled. This is
-- initialized by Osint.Initialize, and further initialized by the
-- Adjust_Global_Switches flag in Gnat1drv.
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.
Tagged_Type_Expansion : Boolean := True;
-- GNAT
-- Set True if tagged types and interfaces should be expanded by the
-- front-end. If False, the original tree is left unexpanded for tagged
-- types and dispatching calls, assuming the underlying target supports it.
Target_Dependent_Info_Read_Name : String_Ptr := null;
-- GNAT
-- Set non-null to override the normal processing in Get_Targ and set the
-- necessary information by reading the target dependent information file
-- whose name is given here (see packages Get_Targ and Set_Targ for full
-- details). Set to non-null file name by use of the -gnateT switch.
Target_Dependent_Info_Write_Name : String_Ptr := null;
-- GNAT
-- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info
-- which writes a target independent information file (see packages
-- Get_Targ and Set_Targ for full details) using the name given by
-- this switch. Set to non-null file name by use of the -gnatet switch.
type Origin_Of_Target is (Unknown, Default, Specified);
Target_Origin : Origin_Of_Target := Unknown;
-- GPRBUILD
-- Indicates the origin of attribute Target in project files
Target_Value : String_Access := null;
-- GPRBUILD
-- Indicates the value of attribute Target in project files
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_Categorization_Errors_As_Warnings : Boolean := False;
-- Normally categorization errors are true illegalities. If this switch
-- is set, then such errors result in warning messages rather than error
-- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in
-- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated
-- pragma Preelaborate differently.
Treat_Restrictions_As_Warnings : Boolean := False;
-- GNAT
-- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
-- -gnatr switch.
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 True by -gnatq or -gnatQ.
Unchecked_Shared_Lib_Imports : Boolean := False;
-- GPRBUILD
-- Set to True when shared library projects are allowed to import projects
-- that are not shared library projects. Set on by use of the switch
-- --unchecked-shared-lib-imports.
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.
Uneval_Old : Character := 'E';
-- GNAT
-- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma
-- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E'
-- for the RM default behavior of giving an error.
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.
Unnest_Subprogram_Mode : Boolean := False;
-- If true, activates the circuitry for unnesting subprograms (see the spec
-- of Exp_Unst for full details). Currently set only by use of -gnatd.1.
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.
Use_Include_Path_File : Boolean := False;
-- GNATMAKE, GPRBUILD
-- When True, create a source search path file, even when a mapping file
-- is used.
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,
-- 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);
pragma Ordered (Verbosity_Level_Type);
Verbosity_Level : Verbosity_Level_Type := High;
-- GNATMAKE
-- Modified by gnatmake 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 by default, modified by use of -gnatwy/Y.
Warn_On_Ada_2012_Compatibility : Boolean := True;
-- GNAT
-- Set to True to generate all warnings on Ada 2012 compatibility issues,
-- including warnings on Ada 2012 obsolescent features used in Ada 2012
-- mode. Modified by use of -gnatwy/Y.
Warn_On_Ada_202X_Compatibility : Boolean := True;
-- GNAT
-- Set to True to generate all warnings on Ada 202X compatibility issues,
-- including warnings on Ada 202X obsolescent features used in Ada 202X
-- mode. ???There is no warning switch for this yet.
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. Modified
-- by use of gnatw.o/.O.
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. Modified by use of -gnatw.a/.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.
-- Modified by use of -gnatww/W.
Warn_On_Atomic_Synchronization : Boolean := False;
-- GNAT
-- Set to True to generate information messages for atomic synchronization.
-- Modified by use of -gnatw.n/.N.
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.
-- Odd by default, modified by use of -gnatwb/B.
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. Modified
-- by use of -gnatw.b/.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_Elab_Access : Boolean := False;
-- GNAT
-- Set to True to generate warnings for P'Access in the case where
-- subprogram P is in the same package as the P'Access, and the P'Access is
-- evaluated at package elaboration time, and occurs before the body of P
-- has been elaborated.
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. Modified by
-- use of -gnatwh/H.
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, modified by use of
-- -gnatwm/M.
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.
-- Modified by use of -gnatwv/V.
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.
-- Modified by use of -gnatw.x/.X.
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_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. Modified by
-- use of -gnatw.r/.R.
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. Modified
-- by use of -gnatwj/J.
Warn_On_Overlap : Boolean := False;
-- GNAT
-- Set to True to generate warnings when a writable actual overlaps with
-- another actual in a subprogram call. This applies only in modes before
-- Ada 2012. Starting with Ada 2012, such overlaps are illegal.
-- Modified by use of -gnatw.i/.I.
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. On by
-- default, modified by use of -gnatwq/Q.
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_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.
-- Modified by use of -gnatwr/R.
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. Modified by -gnatw.v/.V.
Warn_On_Suspicious_Contract : Boolean := True;
-- GNAT
-- Set to True to generate warnings for suspicious contracts expressed as
-- pragmas or aspects precondition and postcondition, as well as other
-- suspicious cases of expressions typically found in contracts like
-- quantified expressions and uses of Update attribute. The default is that
-- this warning is enabled. Modified by use of -gnatw.t/.T.
Warn_On_Suspicious_Modulus_Value : Boolean := True;
-- GNAT
-- Set to True to generate warnings for suspicious modulus values. The
-- default is that this warning is enabled. Modified by -gnatw.m/.M.
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). Modified
-- by use of -gnatwz/Z.
Warn_On_Unordered_Enumeration_Type : Boolean := False;
-- GNAT
-- Set to True to generate warnings for inappropriate uses (comparisons
-- and explicit ranges) on unordered enumeration types (which includes
-- all enumeration types for which pragma Ordered is not given). The
-- default is that this warning is disabled. Modified by -gnat.u/.U.
Warn_On_Unrecognized_Pragma : Boolean := True;
-- GNAT
-- Set to True to generate warnings for unrecognized pragmas. The default
-- is that this warning is enabled. Modified by use of -gnatwg/G.
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. Modified by use of -gnatw.c/.C.
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. Also generates warnings for pragma
-- Warning (Off, string) which either has no matching pragma Warning On,
-- or where no warning has been suppressed by the use of the pragma.
-- Modified by use of -gnatw.w/.W.
type Warning_Mode_Type is
(Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors);
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 treated as errors, except for warnings emitted by the
-- Compile_Time_Warning pragma. In Treat_Run_Time_Warnings_As_Errors,
-- warning messages regarding errors raised at run time are treated as
-- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be
-- ignored (except for legality checks), unless we are in GNATprove_Mode,
-- which requires pragma Warnings to be stored for the formal verification
-- backend.
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 (but NOT by a local use of a configuration
-- pragma in a single 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 -gnat83/95/2005/2012, and possibly
-- modified by the use of configuration pragmas Ada_*. 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_Pragma_Config : Node_Id;
-- This will be set nonempty if it is set by a configuration pragma
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_Float_Overflow_Config : Boolean;
-- GNAT
-- Set to True to check that operations on predefined unconstrained float
-- types (e.g. Float, Long_Float) do not overflow and generate infinities
-- or invalid values. Set by the Check_Float_Overflow pragma, or by use
-- of the -gnateF switch.
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.
Default_Pool_Config : Node_Id := Empty;
-- GNAT
-- Same as Default_Pool above, except this is only for Default_Storage_Pool
-- pragmas that are configuration pragmas.
Default_SSO_Config : Character := ' ';
-- GNAT
-- Set if a pragma Default_Scalar_Storage_Order appears as a configuration
-- pragma. A value of ' ' means that no pragma was given, otherwise the
-- value is 'H' for High_Order_First or 'L' for Low_Order_First.
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.
Initialize_Scalars_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that is set by the
-- pragma Initialize_Scalars when it appears in the gnat.adc file.
-- This switch is not set when the pragma appears ahead of a given
-- unit, so it does not affect the compilation of other units.
No_Component_Reordering_Config : Boolean;
-- GNAT
-- This is the value of the configuration switch that is set by the
-- pragma No_Component_Reordering when it appears in the gnat.adc file.
-- This flag is used to set the initial value of No_Component_Reordering
-- at the start of each compilation unit, except that it is always set
-- False for predefined units.
No_Exit_Message : Boolean := False;
-- GNATMAKE, GPRBUILD
-- Set with switch --no-exit-message. When True, if there are compilation
-- failures, the builder does not issue an exit error message.
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.
Prefix_Exception_Messages_Config : Boolean;
-- The setting of Prefix_Exception_Messages from configuration pragmas
SPARK_Mode_Config : SPARK_Mode_Type := None;
-- GNAT
-- The setting of SPARK_Mode from configuration pragmas
SPARK_Mode_Pragma_Config : Node_Id := Empty;
-- If a SPARK_Mode pragma appeared in the configuration pragmas (setting
-- SPARK_Mode_Config appropriately), then this points to the N_Pragma node.
Uneval_Old_Config : Character;
-- GNAT
-- The setting of Uneval_Old from configuration pragmas
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 Register_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.
procedure Restore_Config_Switches (Save : Config_Switches_Type);
-- This procedure restores a set of switch values previously saved by a
-- call to Save_Config_Switches.
function Save_Config_Switches return Config_Switches_Type;
-- Return the current state of all configuration-related attributes
procedure Set_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 or for the spec of 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.
------------------------
-- Other Global Flags --
------------------------
Building_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.
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.
Tagged_Seen : Boolean := False;
-- Set True by the parser if the "tagged" reserved word is seen. This is
-- needed in Exp_Put_Image (see that package for documentation).
-----------------------------------
-- Modes for Formal Verification --
-----------------------------------
GNATprove_Mode : Boolean := False;
-- Specific compiling mode targeting formal verification for those parts
-- of the input code that belong to the SPARK 2014 subset of Ada. Set True
-- by the gnat2why executable or by use of the -gnatd.F debug switch. Note
-- that this is completely separate from the SPARK restriction defined in
-- GNAT to detect violations of a subset of SPARK 2005 rules.
---------------------------
-- Error/Warning Control --
---------------------------
-- The following array would more reasonably be located in Err_Vars or
-- Errout, but we put them here to deal with licensing issues (we need
-- this to have the GPL exception licensing, since these variables and
-- subprograms are accessed from units with this licensing).
Warnings_As_Errors : array (1 .. 10_000) of String_Ptr;
-- Table for recording Warning_As_Error pragmas as they are processed. It
-- would be nicer to use Table, but there are circular elaboration problems
-- if we try to do this, and an attempt to find some other appropriately
-- licensed unit to declare this as a Table failed with various elaboration
-- circularities.
Warnings_As_Errors_Count : Natural;
-- GNAT
-- Number of entries stored in Warnings_As_Errors table
Warnings_As_Errors_Count_Config : Natural;
-- GNAT
-- Count of pattern strings stored from Warning_As_Error pragmas
---------------
-- GNAT_Mode --
---------------
GNAT_Mode : Boolean := False;
-- GNAT
-- True if compiling in GNAT system mode (-gnatg switch)
-- WARNING: There is a matching C declaration of this variable in fe.h
GNAT_Mode_Config : Boolean := False;
-- GNAT
-- True if -gnatg switch is present. GNAT_Mode may be temporary set to
-- True during the analysis of a system unit, but GNAT_Mode_Config must
-- not change once scanned and set.
-- Setting GNAT mode has the following effects on the language that is
-- accepted. Note that several of the following have the effect of changing
-- an error to a warning. But warnings are usually treated as fatal errors
-- in -gnatg mode, so to actually take advantage of such a change, it is
-- necessary to add an explicit pragma Warnings (Off) in the source and
-- this requires clear documentation of why this is necessary.
-- The identifier character set is set to 'n' (7-bit ASCII)
-- Pragma Extend_System is ignored
-- Warning_Mode is set to Treat_As_Error (-gnatwe)
-- Standard style checks are set (See Set_GNAT_Style_Check_Options)
-- Standard warnings are turned on (see Set_GNAT_Mode_Warnings)
-- The Ada version is set to Ada 2012
-- Task priorities are always allowed to be in the range Any_Priority
-- Overflow checks are suppressed, overflow checking set to strict mode
-- ALI files are always generated for predefined generic packages
-- Obsolescent feature warnings are suppressed
-- Recompilation of children of GNAT, System, Ada, Interfaces is allowed
-- The Scalar_Storage_Order attribute applies to generic types
-- Categorization errors are treated as warnings rather than errors
-- Statements in preelaborated units give warnings rather than errors
-- Private objects are allowed in preelaborated units
-- Non-static constants in preelaborated units give warnings not errors
-- The warning about component size being ignored is suppressed
-- The warning about size clauses being ignored is suppressed
-- Initializing limited types gives a warning rather than an error
-- Copying of limited objects is allowed
-- Returning objects of limited types is allowed
-- Non-static call in preelaborated unit give a warning, not an error
-- Warnings on possible elaboration errors are suppressed
-- Warnings about packing being ignored are suppressed
-- Warnings in internal units are not suppressed (they normally are)
-- The only special comment sequence allowed is --!
--------------------------
-- Private Declarations --
--------------------------
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;
Ada_Version_Pragma : Node_Id;
Assertions_Enabled : Boolean;
Assume_No_Invalid_Values : Boolean;
Check_Float_Overflow : Boolean;
Check_Policy_List : Node_Id;
Default_Pool : Node_Id;
Default_SSO : Character;
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;
Initialize_Scalars : Boolean;
No_Component_Reordering : Boolean;
Normalize_Scalars : Boolean;
Optimize_Alignment : Character;
Optimize_Alignment_Local : Boolean;
Persistent_BSS_Mode : Boolean;
Polling_Required : Boolean;
Prefix_Exception_Messages : Boolean;
SPARK_Mode : SPARK_Mode_Type;
SPARK_Mode_Pragma : Node_Id;
Uneval_Old : Character;
Use_VADS_Size : Boolean;
Warnings_As_Errors_Count : Natural;
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;