+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- O P T --
--- --
--- S p e c --
--- --
--- $Revision: 1.4.10.1 $
--- --
--- Copyright (C) 1992-2001, 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- 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 switches set by the initialization
--- routine from the command line and referenced throughout the compiler,
--- the binder or gnatmake. The comments indicate which options are used by
--- which programs (GNAT, GNATBIND, GNATMAKE).
-
-with Hostparm; use Hostparm;
-with Types; use Types;
-with System.WCh_Con; use System.WCh_Con;
-
-package Opt is
-
- ----------------------------------------------
- -- Settings of Modes for Current Processing --
- ----------------------------------------------
-
- -- The following mode values represent the current state of processing.
- -- The values set here are the default values. Unless otherwise noted,
- -- the value may be reset in Switch with an appropropiate switch. In
- -- some cases, the values can also be modified by pragmas, and in the
- -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
- -- the default values.
-
- Ada_Bind_File : Boolean := True;
- -- GNATBIND
- -- Set True if binder file to be generated in Ada rather than C
-
- Ada_95 : Boolean := True;
- -- GNAT
- -- Set True if operating in Ada 95 mode
- -- Set False if operating in Ada 83 mode
-
- Ada_83 : Boolean := False;
- -- GNAT
- -- Set True if operating in Ada 83 mode
- -- Set False if operating in Ada 95 mode
-
- Ada_Final_Suffix : constant String := "final";
- -- GNATBIND
- -- The suffix of the name of the finalization procedure. This variable
- -- may be modified by Gnatbind.Scan_Bind_Arg.
-
- 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";
- -- GNATBIND
- -- The suffix of the name of the initialization procedure. This variable
- -- may be modified by Gnatbind.Scan_Bind_Arg.
-
- 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
-
- 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.
-
- 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;
- -- 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
- -- Enable assertions made using pragma Assert.
-
- Back_Annotate_Rep_Info : Boolean := False;
- -- GNAT
- -- If set True (by use of -gnatB), enables back annotation of
- -- representation information by gigi, even in -gnatc mode.
-
- Bind_Alternate_Main_Name : Boolean := False;
- -- GNATBIND
- -- Set to 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
- -- Set to True to skip compile and link steps
- -- (except when Compile_Only and/or Link_Only are True).
-
- 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).
-
- Check_Object_Consistency : Boolean := False;
- -- GNATBIND, GNATMAKE
- -- Set to True to check whether every object file is consistent with
- -- 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 do not need to check source
- -- consistencies in gnatmake in this sense.
-
- Check_Only : Boolean := False;
- -- GNATBIND
- -- Set to True to do checks only, no output of binder file.
-
- Check_Readonly_Files : Boolean := False;
- -- GNATMAKE
- -- Set to True to check readonly files during the make process.
-
- Check_Source_Files : Boolean := True;
- -- GNATBIND
- -- 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
- -- Set to True to check compiler options during the make process.
-
- Check_Unreferenced : Boolean := False;
- -- GNAT
- -- Set to True to enable checking for unreferenced variables
-
- 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.
-
- Compile_Only : Boolean := False;
- -- GNATMAKE
- -- Set to True to skip bind and link steps (except when Bind_Only is True)
-
- Compress_Debug_Names : Boolean := False;
- -- GNATMAKE
- -- Set to True if the option to compress debug information is set (-gnatC)
-
- Config_File : Boolean := True;
- -- GNAT
- -- Set to False to inhibit reading and processing of gnat.adc file
-
- Config_File_Name : String_Ptr := null;
- -- GNAT
- -- File name of configuration pragmas file (given by switch -gnatec)
-
- Constant_Condition_Warnings : Boolean := False;
- -- GNAT
- -- Set to True to activate warnings on constant conditions
-
- subtype Debug_Level_Value is Nat range 0 .. 3;
- Debugger_Level : Debug_Level_Value := 0;
- -- GNATBIND
- -- The value given to the -g parameter.
- -- The default value for -g with no value is 2
- -- This is usually ignored by GNATBIND, except in the VMS version
- -- where it is passed as an argument to __gnat_initialize to trigger
- -- the activation of the remote debugging interface (is this true???).
-
- Debug_Generated_Code : Boolean := False;
- -- GNAT
- -- Set True (-gnatD switch) to debug generated expanded code instead
- -- of the original source code. Causes debugging information to be
- -- written with respect to the generated code file that is written.
-
- Display_Compilation_Progress : Boolean := False;
- -- GNATMAKE
- -- Set True (-d switch) to display information on progress while compiling
- -- files. Internal switch to be used in conjunction with an IDE such as
- -- Glide.
-
- type Distribution_Stub_Mode_Type is
- -- GNAT
- (No_Stubs,
- -- Normal mode, no generation/compilation of distribution stubs
-
- Generate_Receiver_Stub_Body,
- -- The unit being compiled is the RCI body, and the compiler will
- -- generate the body for the receiver stubs and compile it.
-
- Generate_Caller_Stub_Body);
- -- The unit being compiled is the RCI spec, and the compiler will
- -- generate the body for the caller stubs and compile it.
-
- Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
- -- GNAT
- -- This enumeration variable indicates the five states of distribution
- -- annex stub generation/compilation.
-
- Do_Not_Execute : Boolean := False;
- -- GNATMAKE
- -- Set to True if no actual compilations should be undertaken.
-
- 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).
-
- Elab_Dependency_Output : Boolean := False;
- -- GNATBIND
- -- Set to True to output complete list of elaboration constraints
-
- Elab_Order_Output : Boolean := False;
- -- GNATBIND
- -- Set to True to output chosen elaboration order
-
- Elab_Warnings : Boolean := False;
- -- GNAT
- -- Set to True to generate full elaboration warnings (-gnatwl)
-
- type Exception_Mechanism_Type is (Setjmp_Longjmp, Front_End_ZCX, GCC_ZCX);
- Exception_Mechanism : Exception_Mechanism_Type := Setjmp_Longjmp;
- -- GNAT
- -- Set to the appropriate value depending on the default as given in
- -- system.ads (ZCX_By_Default, GCC_ZCX_Support, Front_End_ZCX_Support)
- -- and the use of -gnatL -gnatZ (and -gnatdX)
-
- Exception_Tracebacks : Boolean := False;
- -- GNATBIND
- -- Set to True to store tracebacks in exception occurrences (-E)
-
- Extensions_Allowed : Boolean := False;
- -- GNAT
-
- 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;
- -- The setting of this switch 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;
- -- The setting of this switch 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).
-
- Float_Format : Character := ' ';
- -- GNAT
- -- A non-blank value indicates that a Float_Format pragma has been
- -- processed, in which case this variable is set to 'I' for IEEE or
- -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
- -- versions of GNAT.
-
- Float_Format_Long : Character := ' ';
- -- GNAT
- -- A non-blank value indicates that a Long_Float pragma has been
- -- processed (this pragma is recognized only in OpenVMS versions
- -- of GNAT), in which case this variable is set to D or G for
- -- D_Float or G_Float.
-
- Force_ALI_Tree_File : Boolean := False;
- -- GNAT
- -- Force generation of ali file even if errors are encountered.
- -- Also forces generation of tree file if -gnatt is also set.
-
- Force_Compilations : Boolean := False;
- -- GNATMAKE
- -- Set to force recompilations even when the objects are up-to-date.
-
- Force_RM_Elaboration_Order : Boolean := False;
- -- GNATBIND
- -- True if binding with forced RM elaboration order (-f switch set)
- -- Note: this is considered an obsolescent option, to be removed in
- -- some future release. it is no longer documented. The proper way
- -- to get this effect is to use -gnatE and suppress elab checks.
-
- Full_List : Boolean := False;
- -- GNAT
- -- Set True to generate full source listing with embedded errors
-
- Global_Discard_Names : Boolean := False;
- -- GNAT
- -- Set true if a pragma Discard_Names applies to the current unit
-
- GNAT_Mode : Boolean := False;
- -- GNAT
- -- True if compiling in GNAT system mode (-g switch set)
-
- HLO_Active : Boolean := False;
- -- GNAT
- -- True if High Level Optimizer is activated
-
- Implementation_Unit_Warnings : Boolean := True;
- -- GNAT
- -- Set True to active warnings for use of implementation internal units.
- -- Can be controlled by use of -gnatwi/-gnatwI.
-
- Identifier_Character_Set : Character;
- -- GNAT
- -- This variable indicates the character set to be used for identifiers.
- -- The possible settings are:
- -- '1' Latin-1
- -- '2' Latin-2
- -- '3' Latin-3
- -- '4' Latin-4
- -- '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.
-
- Ineffective_Inline_Warnings : Boolean := False;
- -- GNAT
- -- Set True to activate warnings if front-end inlining (-gnatN) is not
- -- able to actually inline a particular call (or all calls). Can be
- -- controlled by use of -gnatwp/-gnatwP.
-
- Init_Or_Norm_Scalars : Boolean := False;
- -- GNAT
- -- Set True if a pragma Initialize_Scalars applies to the current unit.
- -- Also set True if a pragma Normalize_Scalars applies.
-
- Initialize_Scalars : Boolean := False;
- -- GNAT
- -- Set True if a pragma Initialize_Scalars applies to the current unit.
- -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
-
- Initialize_Scalars_Mode : Character := 'I';
- -- GNATBIND
- -- Set to 'I' for -Sin (default), 'L' for -Slo, 'H' for -Shi, 'X' for -Sxx
-
- Initialize_Scalars_Val : String (1 .. 2);
- -- GNATBIND
- -- Valid only if Initialize_Scalars_Mode is set to 'X' (-Shh). Contains
- -- the two hex bytes from the -Shh switch.
-
- Inline_Active : Boolean := False;
- -- GNAT
- -- Set True to activate pragma Inline processing across modules. Default
- -- for now is not to inline across module boundaries.
-
- Front_End_Inlining : Boolean := False;
- -- GNAT
- -- Set True to activate inlining by front-end expansion.
-
- Inline_Processing_Required : Boolean := False;
- -- GNAT
- -- Set True if inline processing is required. Inline processing is
- -- required if an active Inline pragma is processed. The flag is set
- -- for a pragma Inline or Inline_Always that is actually active.
-
- In_Place_Mode : Boolean := False;
- -- GNATMAKE
- -- Set True to store ALI and object files in place ie in the object
- -- directory if these files already exist or in the source directory
- -- if not.
-
- Keep_Going : Boolean := False;
- -- GNATMAKE
- -- When True signals gnatmake to ignore compilation errors and keep
- -- processing sources until there is no more work.
-
- Link_Only : Boolean := False;
- -- GNATMAKE
- -- Set to True to skip compile and bind steps
- -- (except when Bind_Only is set to True).
-
- List_Units : Boolean := False;
- -- GNAT
- -- List units in the active library
-
- List_Dependencies : Boolean := False;
- -- GNATMAKE
- -- When True gnatmake verifies that the objects are up to date and
- -- outputs the list of object dependencies. This list can be used
- -- directly in a Makefile.
-
- List_Representation_Info : Int range 0 .. 3 := 0;
- -- GNAT
- -- Set true 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
-
- Locking_Policy : Character := ' ';
- -- GNAT
- -- Set to ' ' for the default case (no locking policy specified).
- -- Reset to first character (uppercase) of locking policy name if a
- -- valid pragma Locking_Policy is encountered.
-
- Look_In_Primary_Dir : Boolean := True;
- -- GNAT, GNATBIND, GNATMAKE
- -- 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.
-
- Mapping_File_Name : String_Ptr := null;
- -- GNAT
- -- File name of mapping between unit names, file names and path names.
- -- (given by switch -gnatem)
-
- Maximum_Errors : Int := 9999;
- -- GNAT, GNATBIND
- -- Maximum number of errors before compilation is terminated
-
- Maximum_File_Name_Length : Int;
- -- GNAT, GNATBIND
- -- Maximum number of characters allowed in a file name, not counting the
- -- extension, as set by the appropriate switch. If no switch is given,
- -- then this value is initialized by Osint to the appropriate value.
-
- Maximum_Processes : Positive := 1;
- -- GNATMAKE
- -- Maximum number of processes that should be spawned to carry out
- -- compilations.
-
- Minimal_Recompilation : Boolean := False;
- -- GNATMAKE
- -- Set to True if minimal recompilation mode requested.
-
- No_Stdlib : Boolean := False;
- -- GNATMAKE
- -- Set to True if no default library search dirs added to search list.
-
- No_Stdinc : Boolean := False;
- -- GNATMAKE
- -- Set to True if no default source search dirs added to search list.
-
- No_Main_Subprogram : Boolean := False;
- -- GNATMAKE, GNATBIND
- -- Set to True if compilation/binding of a program without main
- -- subprogram requested.
-
- Normalize_Scalars : Boolean := False;
- -- GNAT
- -- 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.
-
- No_Run_Time : Boolean := False;
- -- GNAT
- -- Set True if a valid pragma No_Run_Time is processed or if the
- -- flag Targparm.High_Integrity_Mode_On_Target is set True.
-
- type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
- Operating_Mode : Operating_Mode_Type := Generate_Code;
- -- GNAT
- -- Indicates the operating mode of the compiler. The default is generate
- -- code, which runs the parser, semantics and backend. Switches can be
- -- used to set syntax checking only mode, or syntax and semantics checking
- -- only mode. Operating_Mode can also be modified as a result of detecting
- -- errors during the compilation process. In particular if any error is
- -- detected then this flag is reset from Generate_Code to Check_Semantics
- -- after generating an error message.
-
- Output_File_Name_Present : Boolean := False;
- -- GNATBIND, GNAT
- -- Set to True when the output C file name is given with option -o
- -- for GNATBIND or when the object file name is given with option
- -- -gnatO for GNAT.
-
- Output_Linker_Option_List : Boolean := False;
- -- GNATBIND
- -- True if output of list of linker options is requested (-K switch set)
-
- Output_Object_List : Boolean := False;
- -- GNATBIND
- -- True if output of list of objects is requested (-O switch set)
-
- 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.
-
- 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.
-
- Propagate_Exceptions : Boolean := False;
- -- GNAT
- -- Indicates if subprogram descriptor exception tables should be
- -- built for imported subprograms. Set True if a Propagate_Exceptions
- -- pragma applies to the extended main unit.
-
- Queuing_Policy : Character := ' ';
- -- GNAT
- -- Set to ' ' for the default case (no queuing policy specified). Reset to
- -- Reset to first character (uppercase) of locking policy name if a valid
- -- Queuing_Policy pragma is encountered.
-
- Quiet_Output : Boolean := False;
- -- GNATMAKE
- -- Set to True if the list of compilation commands should not be output.
-
- 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 switch is set by Gnatbind.Scan_Bind_Arg.
-
- Software_Overflow_Checking : Boolean;
- -- GNAT
- -- Set to True by Osint.Initialize if the target requires the software
- -- approach to integer arithmetic overflow checking (i.e. the use of
- -- double length arithmetic followed by a range check). Set to False
- -- if the target implements hardware overflow checking.
-
- Stack_Checking_Enabled : Boolean;
- -- GNAT
- -- Set to indicate if -fstack-check switch is set for the compilation.
- -- True means that the switch is set, so that stack checking is enabled.
- -- False means that the switch is not set (no stack checking). This
- -- value is obtained from the external imported value flag_stack_check
- -- in the gcc backend (see Frontend) and may be referenced throughout
- -- the compilation phases.
-
- Strict_Math : aliased Boolean := False;
- -- GNAT
- -- This switch is set True if the current unit is to be compiled in
- -- strict math mode. The effect is to cause certain library file name
- -- substitutions to implement strict math semantics. See the routine
- -- Adjust_File_Name_For_Configuration, and also the configuration
- -- in the body of Opt.
- --
- -- Note: currently this switch is always False. Eventually it will be
- -- settable by a switch and a configuration pragma.
-
- Style_Check : Boolean := False;
- -- GNAT
- -- Set True to perform style checks. Activates checks carried out
- -- in package Style (see body of this package for details of checks)
- -- This flag is set True by either the -gnatg or -gnaty switches.
-
- 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)).
-
- Subunits_Missing : Boolean := False;
- -- This flag is set true if missing subunits are detected with code
- -- generation active. This causes code generation to be skipped.
-
- Suppress_Options : Suppress_Record;
- -- GNAT
- -- Flags set True to suppress corresponding check, i.e. add an implicit
- -- pragma Suppress at the outer level of each unit compiled. Note that
- -- these suppress actions can be overridden by the use of the Unsuppress
- -- pragma. This variable is initialized by Osint.Initialize.
-
- Table_Factor : Int := 1;
- -- Factor by which all initial table sizes set in Alloc are multiplied.
- -- Used in Table to calculate initial table sizes (the initial table
- -- size is the value in Alloc, used as the Table_Initial parameter
- -- value, multiplied by the factor given here. The default value is
- -- used if no -gnatT switch appears.
-
- Task_Dispatching_Policy : Character := ' ';
- -- GNAT
- -- 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.
-
- 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;
- -- Set True if a pragma Time_Slice is processed in the main unit, or
- -- if the T switch is present to set a time slice value.
-
- Time_Slice_Value : Nat;
- -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if a
- -- 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.
-
- Tolerate_Consistency_Errors : Boolean := False;
- -- GNATBIND
- -- Tolerate time stamp and other consistency errors. If this switch is
- -- set true, then inconsistencies result in warnings rather than errors.
-
- Tree_Output : Boolean := False;
- -- GNAT
- -- Set True to generate output tree file
-
- 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.
-
- 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.
-
- 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
- -- Normally set False, indicating that upper half ASCII 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.
-
- Usage_Requested : Boolean := False;
- -- GNAT, GNATBIND, GNATMAKE
- -- Set to True if h switch encountered requesting usage information
-
- Use_VADS_Size : Boolean := False;
- -- GNAT
- -- Set to True if a valid pragma Use_VADS_Size is processed
-
- Validity_Checks_On : Boolean := True;
- -- 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 Sem_Val. The Validity_Checks_On
- -- switch 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 switch set to False.
-
- Verbose_Mode : Boolean := False;
- -- GNAT, GNATBIND
- -- Set to True to get verbose mode (full error message text and location
- -- information sent to standard output, also header, copyright and summary)
-
- Warn_On_Biased_Rounding : Boolean := False;
- -- GNAT
- -- Set to True to generate warnings for static constants that are rounded
- -- in a manner inconsistent with unbiased rounding (round to even). Can
- -- be modified by use of -gnatwb/B.
-
- Warn_On_Hiding : Boolean := False;
- -- GNAT
- -- Set to True to generate warnings if a declared entity hides another
- -- entity. The default is that this warning is suppressed.
-
- Warn_On_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.
-
- type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
- Warning_Mode : Warning_Mode_Type := Normal;
- -- GNAT, GNATBIND
- -- Controls treatment of warning messages. If set to Suppress, warning
- -- messages are not generated at all. In Normal mode, they are generated
- -- but do not count as errors. In Treat_As_Error mode, warning messages
- -- are generated and are treated as errors.
-
- Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
- -- GNAT
- -- 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 Wide_Text_IO files.
-
- Xref_Active : Boolean := True;
- -- GNAT
- -- Set if cross-referencing is enabled (i.e. xref info in ali files)
-
- Zero_Cost_Exceptions_Val : Boolean;
- Zero_Cost_Exceptions_Set : Boolean := False;
- -- GNAT
- -- These values are to record the setting of the zero cost exception
- -- handling mode set by argument switches (-gnatZ/-gnatL). If the
- -- value is set by one of these switches, then Zero_Cost_Exceptions_Set
- -- is set to True, and Zero_Cost_Exceptions_Val indicates the setting.
- -- This value is used to reset ZCX_By_Default_On_Target.
-
- ----------------------------
- -- 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 the gnat.adc file.
-
- Ada_83_Config : Boolean;
- -- GNAT
- -- This is the value of the configuration switch for Ada 83 mode, as set
- -- by the command line switch -gnat83, and possibly modified by the use
- -- of configuration pragmas Ada_95 and Ada_83 in the gnat.adc file. This
- -- switch is used to set the initial value for Ada_83 mode at the start
- -- of analysis of a unit. Note however, that the setting of this switch
- -- is ignored for internal and predefined units (which are always compiled
- -- in Ada 95 mode).
-
- 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).
-
- Extensions_Allowed_Config : Boolean;
- -- GNAT
- -- This is the switch 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 switch 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 switch 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 switch 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 switch is ignored for internal
- -- and predefined units (which are always compiled with Lowercase mode).
-
- 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 switch is used to set the initial value for Polling_Required
- -- at the start of analyzing each unit.
-
- Use_VADS_Size_Config : Boolean;
- -- GNAT
- -- This is the value of the configuration switch that controls the use
- -- of VADS_Size instead of Size whereever 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 switch 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 switch is ignored for internal and predefined
- -- units (which are always compiled with the standard Size semantics).
-
- type Config_Switches_Type is private;
- -- Type used to save values of the switches set from Config values
-
- procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
- -- This procedure saves the current values of the switches which are
- -- initialized from the above Config values, and then resets these
- -- switches according to the Config value settings.
-
- procedure Set_Opt_Config_Switches (Internal_Unit : Boolean);
- -- 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).
-
- procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
- -- This procedure restores a set of switch values previously saved
- -- by a call to Save_Opt_Switches.
-
- procedure Register_Opt_Config_Switches;
- -- This procedure is called after processing the gnat.adc file to record
- -- the values of the Config switches, as possibly modified by the use
- -- of command line switches and configuration pragmas.
-
- ------------------------
- -- Other Global Flags --
- ------------------------
-
- Expander_Active : Boolean := False;
- -- A flag that indicates if expansion is active (True) or deactivated
- -- (False). When expansion is deactivated all calls to expander routines
- -- have no effect. Note that the initial setting of False is merely to
- -- prevent saving of an undefined value for an initial call to the
- -- Expander_Mode_Save_And_Set procedure. For more information on the
- -- use of this flag, see package Expander. Indeed this flag might more
- -- logically be in the spec of Expander, but it is referenced by Errout,
- -- and it really seems wrong for Errout to depend on Expander.
-
- -----------------------
- -- Tree I/O Routines --
- -----------------------
-
- procedure Tree_Read;
- -- Reads switch settings from current tree file using Tree_Read
-
- procedure Tree_Write;
- -- Writes out switch settings to current tree file using Tree_Write
-
-private
-
- type Config_Switches_Type is record
- Ada_83 : Boolean;
- Dynamic_Elaboration_Checks : Boolean;
- Extensions_Allowed : Boolean;
- External_Name_Exp_Casing : External_Casing_Type;
- External_Name_Imp_Casing : External_Casing_Type;
- Polling_Required : Boolean;
- Use_VADS_Size : Boolean;
- end record;
-
-end Opt;
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