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author | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-02 14:18:40 +0000 |
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committer | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-10-02 14:18:40 +0000 |
commit | 83cce46b47d48de4c71b02a20f5bf36296a48568 (patch) | |
tree | 6570bc15069492ca4f53a85c5d09a36d099fd63f /gcc/ada/opt.ads | |
parent | ee6ba406bdc83a0b016ec0099d84035d7fd26fd7 (diff) | |
download | gcc-83cce46b47d48de4c71b02a20f5bf36296a48568.tar.gz |
New Language: Ada
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45955 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ada/opt.ads')
-rw-r--r-- | gcc/ada/opt.ads | 876 |
1 files changed, 876 insertions, 0 deletions
diff --git a/gcc/ada/opt.ads b/gcc/ada/opt.ads new file mode 100644 index 00000000000..7ba1c43d209 --- /dev/null +++ b/gcc/ada/opt.ads @@ -0,0 +1,876 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- O P T -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.194 $ +-- -- +-- 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +-- 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. + + 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 step. + + 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) + + 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. + + 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. + + 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; |