------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- O P T -- -- -- -- S p e c -- -- -- -- -- -- Copyright (C) 1992-2002, 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 flags set by the initialization -- routine from the command line and referenced throughout the compiler, -- the binder, gnatmake or other GNAT tools. The comments indicate which -- options are used by which programs (GNAT, GNATBIND, GNATMAKE, etc). 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, GNATLINK -- 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"; 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 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; -- 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 -- 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 -- 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 -- 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_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 -- Set to True to check compiler options during the make process. Check_Unreferenced : Boolean := False; -- GNAT -- Set to True to enable checking for unreferenced entities other -- than formal parameters (for which see Check_Unreferenced_Formals) Check_Unreferenced_Formals : Boolean := False; -- GNAT -- Set True to check for unreferenced formals. This is turned -- on by -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. Check_Withs : Boolean := False; -- GNAT -- Set to True to enable checking for unused withs, and also the case -- of withing a package and using none of the entities in the package. 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; -- GNAT -- 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 Create_Mapping_File : Boolean := False; -- GNATMAKE -- Set to True (-C switch) to indicate that gnatmake -- invokes the compiler with a mapping file (-gnatem compiler switch). 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 flag 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) Enable_Overflow_Checks : Boolean := False; -- GNAT -- Set to True if -gnato (enable overflow checks) switch is set, -- but not -gnatp. type Exception_Mechanism_Type is (Setjmp_Longjmp, Front_End_ZCX, GCC_ZCX); pragma Convention (C, Exception_Mechanism_Type); 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). The C convention is -- there to make this variable accessible to gigi. Exception_Tracebacks : Boolean := False; -- GNATBIND -- Set to True to store tracebacks in exception occurrences (-E) Extensions_Allowed : Boolean := False; -- GNAT -- Set to True by switch -gnatX if GNAT specific language extensions -- are allowed. For example, "with type" is a GNAT extension. type External_Casing_Type is ( As_Is, -- External names cased as they appear in the Ada source Uppercase, -- External names forced to all uppercase letters Lowercase); -- External names forced to all lowercase letters External_Name_Imp_Casing : External_Casing_Type := Lowercase; -- GNAT -- The setting of this flag determines the casing of external names -- when the name is implicitly derived from an entity name (i.e. either -- no explicit External_Name or Link_Name argument is used, or, in the -- case of extended DEC pragmas, the external name is given using an -- identifier. The As_Is setting is not permitted here (since this would -- create Ada source programs that were case sensitive). External_Name_Exp_Casing : External_Casing_Type := As_Is; -- GNAT -- The setting of this flag determines the casing of an external name -- specified explicitly with a string literal. As_Is means the string -- literal is used as given with no modification to the casing. If -- Lowercase or Uppercase is set, then the string is forced to all -- lowercase or all uppercase letters as appropriate. Note that this -- setting has no effect if the external name is given using an identifier -- in the case of extended DEC import/export pragmas (in this case the -- casing is controlled by External_Name_Imp_Casing), and also has no -- effect if an explicit Link_Name is supplied (a link name is always -- used exactly as given). 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 (-gnatg switch) HLO_Active : Boolean := False; -- GNAT -- True if High Level Optimizer is activated (-gnatH switch) 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-5 (ISO-8859-1) -- '2' Latin-5 (ISO-8859-2) -- '3' Latin-5 (ISO-8859-3) -- '4' Latin-5 (ISO-8859-4) -- '5' Latin-5 (ISO-8859-5, Cyrillic) -- '9' Latin-5 (ISO-8859-9) -- 'p' PC (US, IBM page 437) -- '8' PC (European, IBM page 850) -- 'f' Full upper set (all distinct) -- 'n' No upper characters (Ada/83 rules) -- 'w' Latin-1 plus wide characters allowed in identifiers -- -- The setting affects the set of letters allowed in identifiers and the -- upper/lower case equivalences. It does not affect the interpretation of -- character and string literals, which are always stored using the actual -- coding in the source program. This variable is initialized to the -- default value appropriate to the system (in Osint.Initialize), and then -- reset if a command line switch is used to change the setting. 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_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_Dependencies : Boolean := False; -- GNATMAKE -- When True gnatmake verifies that the objects are up to date and -- outputs the list of object dependencies (-M switch). -- Output depends if -a switch is used or not. -- This list can be used directly in a Makefile. List_Representation_Info : Int range 0 .. 3 := 0; -- GNAT -- Set non-zero by -gnatR switch to list representation information. -- The settings are as follows: -- -- 0 = no listing of representation information (default as above) -- 1 = list rep info for user defined record and array types -- 2 = list rep info for all user defined types and objects -- 3 = like 2, but variable fields are decoded symbolically List_Representation_Info_To_File : Boolean := False; -- GNAT -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 -- to be written to file.rep (where file is the name of the source -- file) instead of stdout. For example, if file x.adb is compiled -- using -gnatR2s then representation info is written to x.adb.ref. type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type); type Write_Repinfo_Line_Proc is access procedure (Info : String); type Close_Repinfo_File_Proc is access procedure; -- Types used for procedure addresses below Creat_Repinfo_File_Access : Creat_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. The -- reason for this slightly strange interface is to prevent Repinfo -- from dragging in Osint in ASIS mode, which would include a lot of -- unwanted units in the ASIS build. 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, GNATBIND, GNATFIND, GNATXREF -- Set to True if no default library search dirs added to search list. No_Stdinc : Boolean := False; -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF -- 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, 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_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 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. RTS_Switch : Boolean := False; -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF -- Set to True when the --RTS switch is set 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. Stack_Checking_Enabled : Boolean; -- GNAT -- Set to indicate if -fstack-check switch is set for the compilation. -- True means that the switch is set, so that stack checking is enabled. -- False means that the switch is not set (no stack checking). This -- value is obtained from the external imported value flag_stack_check -- in the gcc backend (see Frontend) and may be referenced throughout -- the compilation phases. Style_Check : Boolean := False; -- GNAT -- Set True to perform style checks. Activates checks carried out -- in package Style (see body of this package for details of checks) -- This flag is set True by either the -gnatg or -gnaty switches. 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; -- GNAT -- This flag is set true if missing subunits are detected with code -- generation active. This causes code generation to be skipped. Suppress_Checks : Boolean := False; -- GNAT -- Set to True if -gnatp (suppress all checks) switch present. Suppress_Options : Suppress_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; -- GNAT -- Factor by which all initial table sizes set in Alloc are multiplied. -- Used in Table to calculate initial table sizes (the initial table -- size is the value in Alloc, used as the Table_Initial parameter -- value, multiplied by the factor given here. The default value is -- used if no -gnatT switch appears. Task_Dispatching_Policy : Character := ' '; -- GNAT -- 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; -- 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 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. 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. Tree_Output : Boolean := False; -- GNAT -- Set to True (-gnatt) 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. This flag is set to True by -gnatq or -gnatQ. 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 (-gnath for the compiler) 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; -- 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 Sem_Val. 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, GNATCHOP, GNATNAME -- 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_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_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. ---------------------------- -- 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 flag -- 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 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). Polling_Required_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls polling -- mode. It can be set True by the command line switch -gnatP, and then -- further modified by the use of pragma Polling in the gnat.adc file. -- This flag is used to set the initial value for Polling_Required -- at the start of analyzing each unit. Use_VADS_Size_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls the use -- of VADS_Size instead of Size 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 flag is used to set the initial value for -- Use_VADS_Size at the start of analyzing each unit. Note however that -- the setting of this flag is ignored for internal and predefined -- units (which are always compiled with the standard Size semantics). type Config_Switches_Type is private; -- Type used to save values of the switches set from Config values procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); -- This procedure saves the current values of the switches which are -- initialized from the above Config values, and then resets these -- switches according to the Config value settings. procedure Set_Opt_Config_Switches (Internal_Unit : Boolean); -- 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;