diff options
Diffstat (limited to 'gcc-4.8.3/gcc/ada/opt.ads')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/opt.ads | 2045 |
1 files changed, 2045 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/opt.ads b/gcc-4.8.3/gcc/ada/opt.ads new file mode 100644 index 000000000..9beeb5835 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/opt.ads @@ -0,0 +1,2045 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- O P T -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2013, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains global flags set by the initialization routine from +-- the command line and referenced throughout the compiler, the binder, or +-- other GNAT tools. The comments indicate which options are used by which +-- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc). + +-- Some flags are labelled "PROJECT MANAGER". These are used by tools that +-- use the Project Manager. These tools include gnatmake, gnatname, the gnat +-- driver, gnatclean, gprbuild and gprclean. + +with Hostparm; use Hostparm; +with Types; use Types; + +pragma Warnings (Off); +-- This package is used also by gnatcoll +with System.Strings; use System.Strings; +with System.WCh_Con; use System.WCh_Con; +pragma Warnings (On); + +package Opt is + + ---------------------- + -- Checksum Control -- + ---------------------- + + -- Checksums are computed for sources to check for sources being the same + -- from a compilation point of view (e.g. spelling of identifiers and + -- white space layout do not count in this computation). + + -- The way the checksum is computed has evolved across the various versions + -- of GNAT. When gprbuild is called with -m, the checksums must be computed + -- the same way in gprbuild as it was in the GNAT version of the compiler. + -- The different ways are + + -- Version 6.4 and later: + + -- The Accumulate_Token_Checksum procedure is called after each numeric + -- literal and each identifier/keyword. For keywords, Tok_Identifier is + -- used in the call to Accumulate_Token_Checksum. + + -- Versions 5.04 to 6.3: + + -- For keywords, the token value were used in the call to procedure + -- Accumulate_Token_Checksum. Type Token_Type did not include Tok_Some. + + -- Versions 5.03: + + -- For keywords, the token value were used in the call to + -- Accumulate_Token_Checksum. Type Token_Type did not include + -- Tok_Interface, Tok_Overriding, Tok_Synchronized and Tok_Some. + + -- Versions 5.02 and before: + + -- No calls to procedure Accumulate_Token_Checksum (the checksum + -- mechanism was introduced in version 5.03). + + -- To signal to the scanner whether Accumulate_Token_Checksum needs to be + -- called and what versions to call, the following Boolean flags are used: + + Checksum_Accumulate_Token_Checksum : Boolean := True; + -- GPRBUILD + -- Set to False by gprbuild when the version of GNAT is 5.02 or before. If + -- this switch is False, then we do not call Accumulate_Token_Checksum, so + -- the setting of the following two flags is irrelevant. + + Checksum_GNAT_6_3 : Boolean := False; + -- GPRBUILD + -- Set to True by gprbuild when the version of GNAT is 6.3 or before. + + Checksum_GNAT_5_03 : Boolean := False; + -- GPRBUILD + -- Set to True by gprbuild when the version of GNAT is 5.03 or before. + + ---------------------------------------------- + -- Settings of Modes for Current Processing -- + ---------------------------------------------- + + -- The following mode values represent the current state of processing. + -- The values set here are the default values. Unless otherwise noted, + -- the value may be reset in Switch-? with an appropriate switch. In + -- some cases, the values can also be modified by pragmas, and in the + -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify + -- the default values. + + type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012); + pragma Ordered (Ada_Version_Type); + -- Versions of Ada for Ada_Version below. Note that these are ordered, + -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. + -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely + -- what you want, because it will apply to future versions of the language. + + Ada_Version_Default : constant Ada_Version_Type := Ada_2005; + pragma Warnings (Off, Ada_Version_Default); + -- GNAT + -- Default Ada version if no switch given. The Warnings off is to kill + -- constant condition warnings. + -- + -- WARNING: some scripts rely on the format of this line of code. Any + -- change must be coordinated with the scripts requirements. + + Ada_Version : Ada_Version_Type := Ada_Version_Default; + -- GNAT + -- Current Ada version for compiler, as set by configuration pragmas, + -- compiler switches, or implicitly (to Ada_Version_Runtime) when a + -- predefined or internal file is compiled. + + Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; + -- GNAT + -- Like Ada_Version, but does not get set implicitly for predefined + -- or internal units, so it reflects the Ada version explicitly set + -- using configuration pragmas or compiler switches (or if neither + -- appears, it remains set to Ada_Version_Default). This is used in + -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05/12) + -- where in the run-time we want the explicit version set. + + Ada_Version_Runtime : Ada_Version_Type := Ada_2012; + -- GNAT + -- Ada version used to compile the runtime. Used to set Ada_Version (but + -- not Ada_Version_Explicit) when compiling predefined or internal units. + + Ada_Final_Suffix : constant String := "final"; + Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); + -- GNATBIND + -- The name of the procedure that performs the finalization at the end of + -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. + + Ada_Init_Suffix : constant String := "init"; + Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); + -- GNATBIND + -- The name of the procedure that performs initialization at the start + -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. + + Ada_Main_Name_Suffix : constant String := "main"; + -- GNATBIND + -- The suffix for Ada_Main_Name. Defined as a constant here so that it + -- can be referenced in a uniform manner to create either the default + -- value of Ada_Main_Name (declared below), or the non-default name + -- set by Gnatbind.Scan_Bind_Arg. + + Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); + -- GNATBIND + -- The name of the Ada package generated by the binder (when in Ada mode). + -- This variable may be modified by Gnatbind.Scan_Bind_Arg. + + Address_Clause_Overlay_Warnings : Boolean := True; + -- GNAT + -- Set False to disable address clause warnings. Modified by use of + -- -gnatwo/O. + + Address_Is_Private : Boolean := False; + -- GNAT, GNATBIND + -- Set True if package System has the line "type Address is private;" + + All_Errors_Mode : Boolean := False; + -- GNAT + -- Flag set to force display of multiple errors on a single line and + -- also repeated error messages for references to undefined identifiers + -- and certain other repeated error messages. Set by use of -gnatf. + + All_Sources : Boolean := False; + -- GNATBIND + -- Set to True to require all source files to be present. This flag is + -- directly modified by gnatmake to affect the shared binder routines. + + Alternate_Main_Name : String_Ptr := null; + -- GNATBIND + -- Set to non null when Bind_Alternate_Main_Name is True. This value + -- is modified as needed by Gnatbind.Scan_Bind_Arg. + + ASIS_Mode : Boolean := False; + -- GNAT + -- Enable semantic checks and tree transformations that are important + -- for ASIS but that are usually skipped if Operating_Mode is set to + -- Check_Semantics. This flag does not have the corresponding option to set + -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON + -- from the code of GNSA-based tool (a client may need to set ON the + -- Back_Annotate_Rep_Info flag in this case. At the moment this does not + -- make very much sense, because GNSA cannot do back annotation). + + Assertions_Enabled : Boolean := False; + -- GNAT + -- Enable assertions made using pragma Assert + + Assume_No_Invalid_Values : Boolean := False; + -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end + -- assumes that values could have invalid representations, unless it can + -- clearly prove that the values are valid. If this switch is set (by + -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values + -- are valid and in range of their representations. This feature is now + -- fully enabled in the compiler. + + Back_Annotate_Rep_Info : Boolean := False; + -- GNAT + -- If set True, enables back annotation of representation information + -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR + -- (list representation information) or -gnatt (generate tree). It is + -- also set true if certain Unchecked_Conversion instantiations require + -- checking based on annotated values. + + Back_End_Handles_Limited_Types : Boolean; + -- This flag is set true if the back end can properly handle limited or + -- other by reference types, and avoid copies. If this flag is False, then + -- the front end does special expansion for if/case expressions to make + -- sure that no copy occurs. If the flag is True, then the expansion for + -- if and case expressions relies on the back end properly handling things. + -- Currently the default is False for all cases (set in gnat1drv). The + -- default can be modified using -gnatd.L (sets the flag True). This is + -- used to test the possibility of having the backend handle this. + + Bind_Alternate_Main_Name : Boolean := False; + -- GNATBIND + -- True if main should be called Alternate_Main_Name.all. + -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. + + Bind_Main_Program : Boolean := True; + -- GNATBIND + -- Set to False if not binding main Ada program + + Bind_For_Library : Boolean := False; + -- GNATBIND + -- Set to True if the binder needs to generate a file designed for building + -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. + + Bind_Only : Boolean := False; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- Set to True to skip compile and link steps + -- (except when Compile_Only and/or Link_Only are True). + + Blank_Deleted_Lines : Boolean := False; + -- GNAT, GNATPREP + -- Output empty lines for each line of preprocessed input that is deleted + -- in the output, including preprocessor lines starting with a '#'. + + Brief_Output : Boolean := False; + -- GNAT, GNATBIND + -- Force brief error messages to standard error, even if verbose mode is + -- set (so that main error messages go to standard output). + + Build_Bind_And_Link_Full_Project : Boolean := False; + -- GNATMAKE + -- Set to True to build, bind and link all the sources of a project file + -- (switch -B) + + Check_Aliasing_Of_Parameters : Boolean := False; + -- GNAT + -- Set to True to detect whether subprogram parameters and function results + -- alias the same object(s). + + Check_Float_Overflow : Boolean := False; + -- GNAT + -- Set to True to check that operations on predefined unconstrained float + -- types (e.g. Float, Long_Float) do not overflow and generate infinities + -- or invalid values. Set by the Check_Float_Overflow pragma, or by use + -- of the -gnateF switch. + + Check_Object_Consistency : Boolean := False; + -- GNATBIND, GNATMAKE + -- Set to True to check whether every object file is consistent with + -- its corresponding ada library information (ALI) file. An object + -- file is inconsistent with the corresponding ALI file if the object + -- file does not exist or if it has an older time stamp than the ALI file. + -- Default above is for GNATBIND. GNATMAKE overrides this default to + -- True (see Make.Initialize) since we normally do need to check source + -- consistencies in gnatmake. + + Check_Only : Boolean := False; + -- GNATBIND + -- Set to True to do checks only, no output of binder file + + Check_Policy_List : Node_Id := Empty; + -- GNAT + -- This points to the list of N_Pragma nodes for Check_Policy pragmas + -- that are linked through the Next_Pragma fields, with the list being + -- terminated by Empty. The order is most recently processed first. Note + -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value + -- of this variable, implementing the required scope control for pragmas + -- appearing a declarative part. + + Check_Readonly_Files : Boolean := False; + -- GNATMAKE + -- Set to True to check readonly files during the make process + + Check_Source_Files : Boolean := True; + -- GNATBIND, GNATMAKE + -- Set to True to enable consistency checking for any source files that + -- are present (i.e. date must match the date in the library info file). + -- Set to False for object file consistency check only. This flag is + -- directly modified by gnatmake, to affect the shared binder routines. + + Check_Switches : Boolean := False; + -- GNATMAKE, GPRMAKE, GPBUILD + -- Set to True to check compiler options during the make process + + Check_Unreferenced : Boolean := False; + -- GNAT + -- Set to True to enable checking for unreferenced entities other + -- than formal parameters (for which see Check_Unreferenced_Formals) + -- Modified by use of -gnatwu/U. + + Check_Unreferenced_Formals : Boolean := False; + -- GNAT + -- Set to True to check for unreferenced formals. This is turned on by + -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. + + Check_Validity_Of_Parameters : Boolean := False; + -- GNAT + -- Set to True to check for proper scalar initialization of subprogram + -- parameters on both entry and exit. Turned on by??? turned off by??? + + Check_Withs : Boolean := False; + -- GNAT + -- Set to True to enable checking for unused withs, and also the case + -- of withing a package and using none of the entities in the package. + -- Modified by use of -gnatwu/U. + + CodePeer_Mode : Boolean := False; + -- GNAT, GNATBIND + -- Enable full CodePeer mode (SCIL generation, disable switches that + -- interact badly with it, etc...). + + Commands_To_Stdout : Boolean := False; + -- GNATMAKE + -- True if echoed commands to be written to stdout instead of stderr + + Comment_Deleted_Lines : Boolean := False; + -- GNATPREP + -- True if source lines removed by the preprocessor should be commented + -- in the output file. + + Compile_Only : Boolean := False; + -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN + -- GNATMAKE, GPRMAKE, GPRMAKE: + -- set to True to skip bind and link steps (except when Bind_Only is + -- True). + -- GNATCLEAN, GPRCLEAN: + -- set to True to delete only the files produced by the compiler but not + -- the library files or the executable files. + + Config_File : Boolean := True; + -- GNAT + -- Set to False to inhibit reading and processing of gnat.adc file + + Config_File_Names : String_List_Access := null; + -- GNAT + -- Names of configuration pragmas files (given by switches -gnatec) + + Configurable_Run_Time_Mode : Boolean := False; + -- GNAT, GNATBIND + -- Set True if the compiler is operating in configurable run-time mode. + -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target + -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind + -- for details on the handling of the latter pragma. + + Constant_Condition_Warnings : Boolean := False; + -- GNAT + -- Set to True to activate warnings on constant conditions. Modified by + -- use of -gnatwc/C. + + Create_Mapping_File : Boolean := False; + -- GNATMAKE, GPRMAKE + -- Set to True (-C switch) to indicate that the compiler will be invoked + -- with a mapping file (-gnatem compiler switch). + + Debug_Pragmas_Enabled : Boolean := False; + -- GNAT + -- Enable debug statements from pragma Debug + + Debug_Pragmas_Disabled : Boolean := False; + -- GNAT + -- Debug pragmas completely disabled (no semantic checking) + + subtype Debug_Level_Value is Nat range 0 .. 3; + Debugger_Level : Debug_Level_Value := 0; + -- GNATBIND + -- The value given to the -g parameter. The default value for -g with + -- no value is 2. This is usually ignored by GNATBIND, except in the + -- VMS version where it is passed as an argument to __gnat_initialize + -- to trigger the activation of the remote debugging interface. + -- Is this still true ??? + + Debug_Generated_Code : Boolean := False; + -- GNAT + -- Set True (-gnatD switch) to debug generated expanded code instead + -- of the original source code. Causes debugging information to be + -- written with respect to the generated code file that is written. + + Default_Exit_Status : Int := 0; + -- GNATBIND + -- Set the default exit status value. Set by the -Xnnn switch for the + -- binder. + + Default_Stack_Size : Int := -1; + -- GNATBIND + -- Set to default primary stack size in units of bytes. Set by + -- the -dnnn switch for the binder. A value of -1 indicates that no + -- default was set by the binder. + + Default_Sec_Stack_Size : Int := -1; + -- GNATBIND + -- Set to default secondary stack size in units of bytes. Set by + -- the -Dnnn switch for the binder. A value of -1 indicates that no + -- default was set by the binder, and that the default should be the + -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. + + Default_Pool : Node_Id := Empty; + -- GNAT + -- Used to record the storage pool name (or null literal) that is the + -- argument of an applicable pragma Default_Storage_Pool. + -- Empty: No pragma Default_Storage_Pool applies. + -- N_Null node: "pragma Default_Storage_Pool (null);" applies. + -- otherwise: "pragma Default_Storage_Pool (X);" applies, and + -- this points to the name X. + -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. + + Detect_Blocking : Boolean := False; + -- GNAT + -- Set True to force the run time to raise Program_Error if calls to + -- potentially blocking operations are detected from protected actions. + + Display_Compilation_Progress : Boolean := False; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- Set True (-d switch) to display information on progress while compiling + -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). + + type Distribution_Stub_Mode_Type is + -- GNAT + (No_Stubs, + -- Normal mode, no generation/compilation of distribution stubs + + Generate_Receiver_Stub_Body, + -- The unit being compiled is the RCI body, and the compiler will + -- generate the body for the receiver stubs and compile it. + + Generate_Caller_Stub_Body); + -- The unit being compiled is the RCI spec, and the compiler will + -- generate the body for the caller stubs and compile it. + + Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; + -- GNAT + -- This enumeration variable indicates the five states of distribution + -- annex stub generation/compilation. + + Do_Not_Execute : Boolean := False; + -- GNATMAKE + -- Set to True if no actual compilations should be undertaken. + + Dump_Source_Text : Boolean := False; + -- GNAT + -- Set to True (by -gnatL) to dump source text intermingled with generated + -- code. Effective only if either of Debug/Print_Generated_Code is true. + + Dynamic_Elaboration_Checks : Boolean := False; + -- GNAT + -- Set True for dynamic elaboration checking mode, as set by the -gnatE + -- switch or by the use of pragma Elaboration_Checks (Dynamic). + + Dynamic_Stack_Measurement : Boolean := False; + -- GNATBIND + -- Set True to enable dynamic stack measurement (-u flag for gnatbind) + + Dynamic_Stack_Measurement_Array_Size : Nat := 100; + -- GNATBIND + -- Number of measurements we want to store during dynamic stack analysis. + -- When the buffer is full, non-storable results will be output on the fly. + -- The value is relevant only if Dynamic_Stack_Measurement is set. Set + -- by processing of -u flag for gnatbind. + + Elab_Dependency_Output : Boolean := False; + -- GNATBIND + -- Set to True to output complete list of elaboration constraints + + Elab_Order_Output : Boolean := False; + -- GNATBIND + -- Set to True to output chosen elaboration order + + Elab_Warnings : Boolean := False; + -- GNAT + -- Set to True to generate full elaboration warnings (-gnatwl) + + Error_Msg_Line_Length : Nat := 0; + -- GNAT + -- Records the error message line length limit. If this is set to zero, + -- then we get the old style behavior, in which each call to the error + -- message routines generates one line of output as a separate message. + -- If it is set to a non-zero value, then continuation lines are folded + -- to make a single long message, and then this message is split up into + -- multiple lines not exceeding the specified length. Set by -gnatj=nn. + + Exception_Handler_Encountered : Boolean := False; + -- GNAT + -- This flag is set true if the parser encounters an exception handler. + -- It is used to set Warn_On_Exception_Propagation True if the restriction + -- No_Exception_Propagation is set. + + Exception_Extra_Info : Boolean := False; + -- GNAT + -- True when switch -gnateE is used. When True, generate extra information + -- associated with exception messages (in particular range and index + -- checks). + + Exception_Locations_Suppressed : Boolean := False; + -- GNAT + -- Set to True if a Suppress_Exception_Locations configuration pragma is + -- currently active. + + type Exception_Mechanism_Type is + -- Determines the handling of exceptions. See Exp_Ch11 for details + -- + (Front_End_Setjmp_Longjmp_Exceptions, + -- Exceptions use setjmp/longjmp generated explicitly by the front end + -- (this includes gigi or other equivalent parts of the code generator). + -- AT END handlers are converted into exception handlers by the front + -- end in this mode. + + Back_End_Exceptions); + -- Exceptions are handled by the back end. The front end simply + -- generates the handlers as they appear in the source, and AT END + -- handlers are left untouched (they are not converted into exception + -- handlers when operating in this mode. + pragma Convention (C, Exception_Mechanism_Type); + + Exception_Mechanism : Exception_Mechanism_Type := + Front_End_Setjmp_Longjmp_Exceptions; + -- GNAT + -- Set to the appropriate value depending on the default as given in + -- system.ads (ZCX_By_Default). 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. Currently there are no such defined extensions. + + type External_Casing_Type is ( + As_Is, -- External names cased as they appear in the Ada source + Uppercase, -- External names forced to all uppercase letters + Lowercase); -- External names forced to all lowercase letters + + External_Name_Imp_Casing : External_Casing_Type := Lowercase; + -- GNAT + -- The setting of this flag determines the casing of external names + -- when the name is implicitly derived from an entity name (i.e. either + -- no explicit External_Name or Link_Name argument is used, or, in the + -- case of extended DEC pragmas, the external name is given using an + -- identifier. The As_Is setting is not permitted here (since this would + -- create Ada source programs that were case sensitive). + + External_Name_Exp_Casing : External_Casing_Type := As_Is; + -- GNAT + -- The setting of this flag determines the casing of an external name + -- specified explicitly with a string literal. As_Is means the string + -- literal is used as given with no modification to the casing. If + -- Lowercase or Uppercase is set, then the string is forced to all + -- lowercase or all uppercase letters as appropriate. Note that this + -- setting has no effect if the external name is given using an identifier + -- in the case of extended DEC import/export pragmas (in this case the + -- casing is controlled by External_Name_Imp_Casing), and also has no + -- effect if an explicit Link_Name is supplied (a link name is always + -- used exactly as given). + + External_Unit_Compilation_Allowed : Boolean := False; + -- GNATMAKE + -- When True (set by gnatmake switch -x), allow compilation of sources + -- that are not part of any project file. + + Fast_Math : Boolean := False; + -- GNAT + -- Indicates the current setting of Fast_Math mode, as set by the use + -- of a Fast_Math pragma (set on by Fast_Math (On)). + + Float_Format : Character := ' '; + -- GNAT + -- A non-blank value indicates that a Float_Format pragma has been + -- processed, in which case this variable is set to 'I' for IEEE or + -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS + -- versions of GNAT. + + Float_Format_Long : Character := ' '; + -- GNAT + -- A non-blank value indicates that a Long_Float pragma has been + -- processed (this pragma is recognized only in OpenVMS versions + -- of GNAT), in which case this variable is set to D or G for + -- D_Float or G_Float. + + Force_ALI_Tree_File : Boolean := False; + -- GNAT + -- Force generation of ALI file even if errors are encountered. + -- Also forces generation of tree file if -gnatt is also set. + + Disable_ALI_File : Boolean := False; + -- GNAT + -- Disable generation of ALI file + + Force_Checking_Of_Elaboration_Flags : Boolean := False; + -- GNATBIND + -- True if binding with forced checking of the elaboration flags + -- (-F switch set). + + Force_Compilations : Boolean := False; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- Set to force recompilations even when the objects are up-to-date. + + Full_Path_Name_For_Brief_Errors : Boolean := False; + -- PROJECT MANAGER + -- When True, in Brief_Output mode, each error message line + -- will start with the full path name of the source. + -- When False, only the file name without directory information + -- is used. + + Full_List : Boolean := False; + -- GNAT + -- Set True to generate full source listing with embedded errors + + Full_List_File_Name : String_Ptr := null; + -- GNAT + -- Set to file name to generate full source listing to named file (or if + -- the name is of the form .xxx, then to name.xxx where name is the source + -- file name with extension stripped. + + Generate_Processed_File : Boolean := False; + -- GNAT + -- True when switch -gnateG is used. When True, create in a file + -- <source>.prep, if the source is preprocessed. + + Generate_SCO : Boolean := False; + -- GNAT + -- True when switch -fdump-scos (or -gnateS) is used. When True, Source + -- Coverage Obligation (SCO) information is generated and output in the ALI + -- file. See unit Par_SCO for full details. + + Generate_SCO_Instance_Table : Boolean := False; + -- GNAT + -- True when switch -fdebug-instances is used. When True, a table of + -- instances is included in SCOs. + + Generate_Target_Dependent_Info : Boolean := False; + -- GNAT + -- When true (-gnatet switch used). True if target dependent info is to be + -- generated in the ali file. + + Generating_Code : Boolean := False; + -- GNAT + -- True if the frontend finished its work and has called the backend to + -- process the tree and generate the object file. + + Global_Discard_Names : Boolean := False; + -- GNAT, GNATBIND + -- True if a pragma Discard_Names appeared as a configuration pragma for + -- the current compilation unit. + + GNAT_Mode : Boolean := False; + -- GNAT + -- True if compiling in GNAT system mode (-gnatg switch) + + Heap_Size : Nat := 0; + -- GNATBIND + -- Heap size for memory allocations. Valid values are 32 and 64. Only + -- available on VMS. + + Identifier_Character_Set : Character; + -- GNAT + -- This variable indicates the character set to be used for identifiers. + -- The possible settings are: + -- '1' Latin-5 (ISO-8859-1) + -- '2' Latin-5 (ISO-8859-2) + -- '3' Latin-5 (ISO-8859-3) + -- '4' Latin-5 (ISO-8859-4) + -- '5' Latin-5 (ISO-8859-5, Cyrillic) + -- '9' Latin-5 (ISO-8859-9) + -- 'p' PC (US, IBM page 437) + -- '8' PC (European, IBM page 850) + -- 'f' Full upper set (all distinct) + -- 'n' No upper characters (Ada 83 rules) + -- 'w' Latin-1 plus wide characters allowed in identifiers + -- + -- The setting affects the set of letters allowed in identifiers and the + -- upper/lower case equivalences. It does not affect the interpretation of + -- character and string literals, which are always stored using the actual + -- coding in the source program. This variable is initialized to the + -- default value appropriate to the system (in Osint.Initialize), and then + -- reset if a command line switch is used to change the setting. + + Ignore_Rep_Clauses : Boolean := False; + -- GNAT + -- Set True to ignore all representation clauses. Useful when compiling + -- code from foreign compilers for checking or ASIS purposes. Can be + -- set True by use of -gnatI. + + Ignore_Style_Checks_Pragmas : Boolean := False; + -- GNAT + -- Set True to ignore all Style_Checks pragmas. Can be set True by use + -- of -gnateY. + + Implementation_Unit_Warnings : Boolean := True; + -- GNAT + -- Set True to active warnings for use of implementation internal units. + -- Modified by use of -gnatwi/-gnatwI. + + Implicit_Packing : Boolean := False; + -- GNAT + -- If set True, then a Size attribute clause on an array is allowed to + -- cause implicit packing instead of generating an error message. Set by + -- use of pragma Implicit_Packing. + + Ineffective_Inline_Warnings : Boolean := False; + -- GNAT + -- Set True to activate warnings if front-end inlining (-gnatN) is not + -- able to actually inline a particular call (or all calls). Can be + -- controlled by use of -gnatwp/-gnatwP. + + Init_Or_Norm_Scalars : Boolean := False; + -- GNAT, GANTBIND + -- Set True if a pragma Initialize_Scalars applies to the current unit. + -- Also set True if a pragma Normalize_Scalars applies. + + Initialize_Scalars : Boolean := False; + -- GNAT + -- Set True if a pragma Initialize_Scalars applies to the current unit. + -- Note that Init_Or_Norm_Scalars is also set to True if this is True. + + Initialize_Scalars_Mode1 : Character := 'I'; + Initialize_Scalars_Mode2 : Character := 'N'; + -- GNATBIND + -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default + -- is IN (invalid values), used if no -S switch is used. + + Inline_Active : Boolean := False; + -- GNAT + -- Set True to activate pragma Inline processing across modules. Default + -- for now is not to inline across module boundaries. + + Inline_Level : Nat := 0; + -- GNAT + -- Set to indicate the inlining level: 0 means that an appropriate value is + -- to be computed by the compiler based on the optimization level (-gnatn), + -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full + -- inlining across modules (-gnatn2). + + Interface_Library_Unit : Boolean := False; + -- GNATBIND + -- Set to True to indicate that at least one ALI file is an interface ALI: + -- then elaboration flag checks are to be generated in the binder + -- generated file. + + Generate_SCIL : Boolean := False; + -- GNAT + -- Set True to activate SCIL code generation. + + Invalid_Value_Used : Boolean := False; + -- GNAT + -- Set True if a valid Invalid_Value attribute is encountered + + Follow_Links_For_Files : Boolean := False; + -- PROJECT MANAGER + -- Set to True (-eL) to process the project files in trusted mode. If + -- Follow_Links is False, it is assumed that the project doesn't contain + -- any file duplicated through symbolic links (although the latter are + -- still valid if they point to a file which is outside of the project), + -- and that no directory has a name which is a valid source name. + + Follow_Links_For_Dirs : Boolean := False; + -- PROJECT MANAGER + -- Set to True if directories can be links in this project, and therefore + -- additional system calls must be performed to ensure that we always see + -- the same full name for each directory. + + Front_End_Inlining : Boolean := False; + -- GNAT + -- Set True to activate inlining by front-end expansion + + Inline_Processing_Required : Boolean := False; + -- GNAT + -- Set True if inline processing is required. Inline processing is required + -- if an active Inline pragma is processed. The flag is set for a pragma + -- Inline or Inline_Always that is actually active. + + In_Place_Mode : Boolean := False; + -- GNATMAKE + -- Set True to store ALI and object files in place i.e. in the object + -- directory if these files already exist or in the source directory + -- if not. + + Keep_Going : Boolean := False; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- When True signals to ignore compilation errors and keep processing + -- sources until there is no more work. + + Keep_Temporary_Files : Boolean := False; + -- GNATCMD + -- When True the temporary files created by the GNAT driver are not + -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES. + + Leap_Seconds_Support : Boolean := False; + -- GNATBIND + -- Set to True to enable leap seconds support in Ada.Calendar and its + -- children. + + Link_Only : Boolean := False; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- Set to True to skip compile and bind steps (except when Bind_Only is + -- set to True). + + List_Inherited_Aspects : Boolean := False; + -- GNAT + -- List inherited invariants, preconditions, and postconditions from + -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited + -- subtype predicates. Modified by use of -gnatw.l/.L. + + List_Restrictions : Boolean := False; + -- GNATBIND + -- Set to True to list restrictions pragmas that could apply to partition + + List_Units : Boolean := False; + -- GNAT + -- List units in the active library for a compilation (-gnatu switch) + + List_Closure : Boolean := False; + -- GNATBIND + -- List all sources in the closure of a main (-R gnatbind switch) + + List_Dependencies : Boolean := False; + -- GNATMAKE + -- When True gnatmake verifies that the objects are up to date and + -- outputs the list of object dependencies (-M switch). + -- Output depends if -a switch is used or not. + -- This list can be used directly in a Makefile. + + List_Representation_Info : Int range 0 .. 3 := 0; + -- GNAT + -- Set non-zero by -gnatR switch to list representation information. + -- The settings are as follows: + -- + -- 0 = no listing of representation information (default as above) + -- 1 = list rep info for user defined record and array types + -- 2 = list rep info for all user defined types and objects + -- 3 = like 2, but variable fields are decoded symbolically + + List_Representation_Info_To_File : Boolean := False; + -- GNAT + -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be + -- written to file.rep (where file is the name of the source file) instead + -- of stdout. For example, if file x.adb is compiled using -gnatR2s then + -- representation info is written to x.adb.ref. + + List_Representation_Info_Mechanisms : Boolean := False; + -- GNAT + -- Set true by -gnatRm switch. Causes information on mechanisms to be + -- included in the representation output information. + + List_Preprocessing_Symbols : Boolean := False; + -- GNAT, GNATPREP + -- Set to True if symbols for preprocessing a source are to be listed + -- before preprocessing occurs. Set to True by switch -s of gnatprep or + -- -s in preprocessing data file for the compiler. + + type Create_Repinfo_File_Proc is access procedure (Src : String); + type Write_Repinfo_Line_Proc is access procedure (Info : String); + type Close_Repinfo_File_Proc is access procedure; + -- Types used for procedure addresses below + + Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; + Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; + Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; + -- GNAT + -- These three locations are left null when operating in non-compiler (e.g. + -- ASIS mode), but when operating in compiler mode, they are set to point + -- to the three corresponding procedures in Osint-C. The reason for this + -- slightly strange interface is to stop Repinfo from dragging in Osint in + -- ASIS mode, which would include lots of unwanted units in the ASIS build. + + type Create_List_File_Proc is access procedure (S : String); + type Write_List_Info_Proc is access procedure (S : String); + type Close_List_File_Proc is access procedure; + -- Types used for procedure addresses below + + Create_List_File_Access : Create_List_File_Proc := null; + Write_List_Info_Access : Write_List_Info_Proc := null; + Close_List_File_Access : Close_List_File_Proc := null; + -- GNAT + -- These three locations are left null when operating in non-compiler + -- (e.g. from the binder), but when operating in compiler mode, they are + -- set to point to the three corresponding procedures in Osint-C. The + -- reason for this slightly strange interface is to prevent Repinfo + -- from dragging in Osint-C in the binder, which would include unwanted + -- units in the binder. + + Locking_Policy : Character := ' '; + -- GNAT, GNATBIND + -- Set to ' ' for the default case (no locking policy specified). Reset to + -- first character (uppercase) of locking policy name if a valid pragma + -- Locking_Policy is encountered. + + Locking_Policy_Sloc : Source_Ptr := No_Location; + -- GNAT, GNATBIND + -- Remember location of previous Locking_Policy pragma. This is used for + -- inconsistency error messages. A value of System_Location is used if the + -- policy is set in package System. + + Look_In_Primary_Dir : Boolean := True; + -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN + -- Set to False if a -I- was present on the command line. When True we are + -- allowed to look in the primary directory to locate other source or + -- library files. + + Make_Steps : Boolean := False; + -- GNATMAKE + -- Set to True when either Compile_Only, Bind_Only or Link_Only is + -- set to True. + + Main_Index : Int := 0; + -- GNATMAKE + -- This is set to non-zero by gnatmake switch -eInnn to indicate that + -- the main program is the nnn unit in a multi-unit source file. + + Mapping_File_Name : String_Ptr := null; + -- GNAT + -- File name of mapping between unit names, file names and path names. + -- (given by switch -gnatem) + + Maximum_Messages : Int := 9999; + -- GNAT, GNATBIND + -- Maximum default number of errors before compilation is terminated, or in + -- the case of GNAT, maximum number of warnings before further warnings are + -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. + + Maximum_File_Name_Length : Int; + -- GNAT, GNATBIND + -- Maximum number of characters allowed in a file name, not counting the + -- extension, as set by the appropriate switch. If no switch is given, + -- then this value is initialized by Osint to the appropriate value. + + Maximum_Instantiations : Int := 8000; + -- GNAT + -- Maximum number of instantiations permitted (to stop runaway cases + -- of nested instantiations). These situations probably only occur in + -- specially concocted test cases. Can be modified by -gnateinn switch. + + Maximum_Processes : Positive := 1; + -- GNATMAKE, GPRMAKE, GPRBUILD + -- Maximum number of processes that should be spawned to carry out + -- compilations. + + Minimal_Recompilation : Boolean := False; + -- GNATMAKE + -- Set to True if minimal recompilation mode requested + + Multiple_Unit_Index : Int; + -- GNAT + -- This is set non-zero if the current unit is being compiled in multiple + -- unit per file mode, meaning that the current unit is selected from the + -- sequence of units in the current source file, using the value stored + -- in this variable (e.g. 2 = select second unit in file). A value of + -- zero indicates that we are in normal (one unit per file) mode. + + No_Deletion : Boolean := False; + -- GNATPREP + -- Set by preprocessor switch -a. Do not eliminate any source text. Implies + -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all + -- branches of #if constructs. + + No_Main_Subprogram : Boolean := False; + -- GNATMAKE, GNATBIND + -- Set to True if compilation/binding of a program without main + -- subprogram requested. + + No_Run_Time_Mode : Boolean := False; + -- GNAT, GNATBIND + -- This flag is set True if a No_Run_Time pragma is encountered. See + -- spec of Rtsfind for a full description of handling of this pragma. + + No_Split_Units : Boolean := False; + -- GPRBUILD + -- Set to True with switch --no-split-units. When True, unit sources, spec, + -- body and subunits, must all be in the same project.This is checked after + -- each compilation. + + No_Stdinc : Boolean := False; + -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF + -- Set to True if no default source search dirs added to search list + + No_Stdlib : Boolean := False; + -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF + -- Set to True if no default library search dirs added to search list + + No_Strict_Aliasing : Boolean := False; + -- GNAT + -- Set True if pragma No_Strict_Aliasing with no parameters encountered + + Normalize_Scalars : Boolean := False; + -- GNAT, GNATBIND + -- Set True if a pragma Normalize_Scalars applies to the current unit. + -- Note that Init_Or_Norm_Scalars is also set to True if this is True. + + Object_Directory_Present : Boolean := False; + -- GNATMAKE + -- Set to True when an object directory is specified with option -D + + Object_Path_File_Name : String_Ptr := null; + -- GNAT2WHY + -- Path of the temporary file that contains a list of object directories + -- passed by -gnateO=<obj_path_file>. + + One_Compilation_Per_Obj_Dir : Boolean := False; + -- GNATMAKE, GPRBUILD + -- Set to True with switch --single-compile-per-obj-dir. When True, there + -- cannot be simultaneous compilations with the object files in the same + -- object directory, if project files are used. + + type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); + Operating_Mode : Operating_Mode_Type := Generate_Code; + -- GNAT + -- Indicates the operating mode of the compiler. The default is generate + -- code, which runs the parser, semantics and backend. Switches can be + -- used to set syntax checking only mode, or syntax and semantics checking + -- only mode. Operating_Mode can also be modified as a result of detecting + -- errors during the compilation process. In particular if any serious + -- error is detected then this flag is reset from Generate_Code to + -- Check_Semantics after generating an error message. + + Optimize_Alignment : Character := 'O'; + -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can + -- be modified by use of pragma Optimize_Alignment. + + Optimize_Alignment_Local : Boolean := False; + -- Set True if Optimize_Alignment mode is set by a local configuration + -- pragma that overrides the gnat.adc (or other configuration file) default + -- so that the unit is not dependent on the default setting. Also always + -- set True for internal units, since these always have a default setting + -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to + -- them all having such an explicit pragma in each unit). + + Original_Operating_Mode : Operating_Mode_Type := Generate_Code; + -- GNAT + -- Indicates the original operating mode of the compiler as set by compiler + -- options. This is identical to Operating_Mode except that this is not + -- affected by errors. + + Optimization_Level : Int; + pragma Import (C, Optimization_Level, "optimize"); + -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) + -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and + -- GNAAMP back ends. + + Optimize_Size : Int; + pragma Import (C, Optimize_Size, "optimize_size"); + -- Constant reflecting setting of -Os (optimize for size). Set to nonzero + -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c + -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends + + Output_File_Name_Present : Boolean := False; + -- GNATBIND, GNAT, GNATMAKE, GPRMAKE + -- Set to True when the output C file name is given with option -o for + -- GNATBIND, when the object file name is given with option -gnatO for GNAT + -- or when the executable is given with option -o for GNATMAKE or GPRMAKE. + + Output_Linker_Option_List : Boolean := False; + -- GNATBIND + -- True if output of list of linker options is requested (-K switch set) + + Output_ALI_List : Boolean := False; + ALI_List_Filename : String_Ptr; + -- GNATBIND + -- True if output of list of ALIs is requested (-A switch set). List is + -- output under the given filename, or standard output if not specified. + + Output_Object_List : Boolean := False; + Object_List_Filename : String_Ptr; + -- GNATBIND + -- True if output of list of objects is requested (-O switch set). List is + -- output under the given filename, or standard output if not specified. + + Partition_Elaboration_Policy : Character := ' '; + -- GNAT, GNATBIND + -- Set to ' ' for the default case (no elaboration policy specified). Reset + -- to first character (uppercase) of locking policy name if a valid pragma + -- Partition_Elaboration_Policy is encountered. + + Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; + -- GNAT, GNATBIND + -- Remember location of previous Partition_Elaboration_Policy pragma. This + -- is used for inconsistency error messages. A value of System_Location is + -- used if the policy is set in package System. + + Persistent_BSS_Mode : Boolean := False; + -- GNAT + -- True if a Persistent_BSS configuration pragma is in effect, causing + -- potentially persistent data to be placed in the persistent_bss section. + + Pessimistic_Elab_Order : Boolean := False; + -- GNATBIND + -- True if pessimistic elaboration order is to be chosen (-p switch set) + + Polling_Required : Boolean := False; + -- GNAT + -- Set to True if polling for asynchronous abort is enabled by using + -- the -gnatP option for GNAT. + + Preprocessing_Data_File : String_Ptr := null; + -- GNAT + -- Set by switch -gnatep=. The file name of the preprocessing data file. + + Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); + -- An extensible array to temporarily stores symbol definitions specified + -- on the command line with -gnateD switches. + -- What is this magic constant 4 ??? + -- What is extensible about this fixed length array ??? + + Preprocessing_Symbol_Last : Natural := 0; + -- Index of last symbol definition in array Symbol_Definitions + + Print_Generated_Code : Boolean := False; + -- GNAT + -- Set to True to enable output of generated code in source form. This + -- flag is set by the -gnatG switch. + + Print_Standard : Boolean := False; + -- GNAT + -- Set to true to enable printing of package standard in source form. + -- This flag is set by the -gnatS switch + + Propagate_Exceptions : Boolean := False; + -- GNAT + -- Indicates if subprogram descriptor exception tables should be + -- built for imported subprograms. Set True if a Propagate_Exceptions + -- pragma applies to the extended main unit. + + type Usage is (Unknown, Not_In_Use, In_Use); + Project_File_In_Use : Usage := Unknown; + -- GNAT + -- Indicates if a project file is used or not. Set to In_Use by the first + -- SFNP pragma. + + Queuing_Policy : Character := ' '; + -- GNAT, GNATBIND + -- Set to ' ' for the default case (no queuing policy specified). Reset to + -- first character (uppercase) of locking policy name if a valid + -- Queuing_Policy pragma is encountered. + + Queuing_Policy_Sloc : Source_Ptr := No_Location; + -- GNAT, GNATBIND + -- Remember location of previous Queuing_Policy pragma. This is used for + -- inconsistency error messages. A value of System_Location is used if the + -- policy is set in package System. + + Quiet_Output : Boolean := False; + -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN + -- Set to True if the tool should not have any output if there are no + -- errors or warnings. + + Overriding_Renamings : Boolean := False; + -- GNAT + -- Set to True to enable compatibility mode with Rational compiler, and + -- to accept renamings of implicit operations in their own scope. + + Replace_In_Comments : Boolean := False; + -- GNATPREP + -- Set to True if -C switch used + + RTS_Lib_Path_Name : String_Ptr := null; + RTS_Src_Path_Name : String_Ptr := null; + -- GNAT + -- Set to the "adalib" and "adainclude" directories of the run time + -- specified by --RTS=. + + RTS_Switch : Boolean := False; + -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF + -- Set to True when the --RTS switch is set + + Run_Path_Option : Boolean := True; + -- GNATMAKE, GNATLINK + -- Set to False when no run_path_option should be issued to the linker + + Search_Directory_Present : Boolean := False; + -- GNAT + -- Set to True when argument is -I. Reset to False when next argument, a + -- search directory path is taken into account. Note that this is quite + -- different from other switches in this section in that it is only set in + -- a transitory manner as a result of scanning a -I switch with no file + -- name, and if set, is an indication that the next argument is to be + -- treated as a file name. + + Sec_Stack_Used : Boolean := False; + -- GNAT, GBATBIND + -- Set True if generated code uses the System.Secondary_Stack package. For + -- the binder, set if any unit uses the secondary stack package. + + Setup_Projects : Boolean := False; + -- GNAT DRIVER + -- Set to True for GNAT SETUP: the Project Manager creates non existing + -- object, library and exec directories. + + Shared_Libgnat : Boolean; + -- GNATBIND + -- Set to True if a shared libgnat is requested by using the -shared option + -- for GNATBIND and to False when using the -static option. The value of + -- this flag is set by Gnatbind.Scan_Bind_Arg. + + Short_Circuit_And_Or : Boolean := False; + -- GNAT + -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. + + Short_Descriptors : Boolean := False; + -- GNAT + -- Set True if a pragma Short_Descriptors applies to the current unit. + + Special_Exception_Package_Used : Boolean := False; + -- GNAT + -- Set to True if either of the unit GNAT.Most_Recent_Exception or + -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of + -- local raise statements into gotos in the presence of either package. + + Sprint_Line_Limit : Nat := 72; + -- GNAT + -- Limit values for chopping long lines in Sprint output, can be reset + -- by use of NNN parameter with -gnatG or -gnatD switches. + + Stack_Checking_Enabled : Boolean; + -- GNAT + -- Set to indicate if -fstack-check switch is set for the compilation. True + -- means that the switch is set, so that stack checking is enabled. False + -- means that the switch is not set (no stack checking). This value is + -- obtained from the external imported value flag_stack_check in the gcc + -- backend (see Frontend) and may be referenced throughout the compilation + -- phases. + + Style_Check : Boolean := False; + -- GNAT + -- Set True to perform style checks. Activates checks carried out in + -- package Style (see body of this package for details of checks). This + -- flag is set True by either the -gnatg or -gnaty switches. + + Suppress_All_Inlining : Boolean := False; + -- GNAT + -- Set by -fno-inline. Suppresses all inlining, both front end and back end + -- regardless of any other switches that are set. + + Suppress_Control_Flow_Optimizations : Boolean := False; + -- GNAT + -- Set by -fpreserve-control-flow. Suppresses control flow optimizations + -- that interfere with coverage analysis based on the object code. + + System_Extend_Pragma_Arg : Node_Id := Empty; + -- GNAT + -- Set non-empty if and only if a correct Extend_System pragma was present + -- in which case it points to the argument of the pragma, and the name can + -- be located as Chars (Expression (System_Extend_Pragma_Arg)). + + System_Extend_Unit : Node_Id := Empty; + -- GNAT + -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System + -- is never appropriate in GNAT_Mode (and causes troubles, including + -- bogus circularities, if we try to compile the run-time library with + -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit + -- is a copy of the value set in System_Extend_Pragma_Arg. + + Subunits_Missing : Boolean := False; + -- GNAT + -- This flag is set true if missing subunits are detected with code + -- generation active. This causes code generation to be skipped. + + Suppress_Checks : Boolean := False; + -- GNAT + -- Set to True if -gnatp (suppress all checks) switch present. + + Suppress_Options : Suppress_Record; + -- GNAT + -- Indicates outer level setting of check suppression. This initializes + -- the settings of the outer scope level in any unit compiled. This is + -- initialized by Osint.Initialize, and further initialized by the + -- Adjust_Global_Switches flag in Gnat1drv. + + Suppress_Back_Annotation : Boolean := False; + -- GNAT + -- This flag is set True if back annotation of representation information + -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set. + -- This avoids unnecessary time being spent on back annotation. + + Table_Factor : Int := 1; + -- GNAT + -- Factor by which all initial table sizes set in Alloc are multiplied. + -- Used in Table to calculate initial table sizes (the initial table size + -- is the value in Alloc, used as the Table_Initial parameter value, + -- multiplied by the factor given here. The default value is used if no + -- -gnatT switch appears. + + Tagged_Type_Expansion : Boolean := True; + -- GNAT + -- Set True if tagged types and interfaces should be expanded by the + -- front-end. If False, the original tree is left unexpanded for tagged + -- types and dispatching calls, assuming the underlying target supports + -- it (e.g. in the JVM case). + + Task_Dispatching_Policy : Character := ' '; + -- GNAT, GNATBIND + -- Set to ' ' for the default case (no task dispatching policy specified). + -- Reset to first character (uppercase) of task dispatching policy name + -- if a valid Task_Dispatching_Policy pragma is encountered. + + Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; + -- GNAT, GNATBIND + -- Remember location of previous Task_Dispatching_Policy pragma. This is + -- used for inconsistency error messages. A value of System_Location is + -- used if the policy is set in package System. + + Tasking_Used : Boolean := False; + -- Set True if any tasking construct is encountered. Used to activate the + -- output of the Q, L and T lines in ALI files. + + Time_Slice_Set : Boolean := False; + -- GNATBIND + -- Set True if a pragma Time_Slice is processed in the main unit, or + -- if the -gnatTnn switch is present to set a time slice value. + + Time_Slice_Value : Nat; + -- GNATBIND + -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if + -- Time_Slice pragma has been processed. Set to the time slice value in + -- microseconds. Negative values are stored as zero, and the value is not + -- larger than 1_000_000_000 (1000 seconds). Values larger than this are + -- reset to this maximum. This can also be set with the -gnatTnn switch. + + Tolerate_Consistency_Errors : Boolean := False; + -- GNATBIND + -- Tolerate time stamp and other consistency errors. If this flag is set to + -- True (-t), then inconsistencies result in warnings rather than errors. + + Treat_Categorization_Errors_As_Warnings : Boolean := False; + -- Normally categorization errors are true illegalities. If this switch + -- is set, then such errors result in warning messages rather than error + -- messages. Set True by -gnateP (P for Pure/Preelaborate). + + Treat_Restrictions_As_Warnings : Boolean := False; + -- GNAT + -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by + -- -gnatr switch. + + Tree_Output : Boolean := False; + -- GNAT + -- Set to True (-gnatt) to generate output tree file + + True_VMS_Target : Boolean := False; + -- Set True if we are on a VMS target. The setting of this flag reflects + -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which + -- can also be true when debug flag m is set (-gnatdm). This is used in the + -- few cases where we do NOT want -gnatdm to trigger the VMS behavior. + + Try_Semantics : Boolean := False; + -- GNAT + -- Flag set to force attempt at semantic analysis, even if parser errors + -- occur. This will probably cause blowups at this stage in the game. On + -- the other hand, most such blowups will be caught cleanly and simply + -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ. + + Unchecked_Shared_Lib_Imports : Boolean := False; + -- GPRBUILD + -- Set to True when shared library projects are allowed to import projects + -- that are not shared library projects. Set by switch + -- --unchecked-shared-lib-imports. + + Undefined_Symbols_Are_False : Boolean := False; + -- GNAT, GNATPREP + -- Set to True by switch -u of gnatprep or -u in the preprocessing data + -- file for the compiler. Indicates that while preprocessing sources, + -- symbols that are not defined have the value FALSE. + + Unique_Error_Tag : Boolean := Tag_Errors; + -- GNAT + -- Indicates if error messages are to be prefixed by the string error: + -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. + + Universal_Addressing_On_AAMP : Boolean := False; + -- GNAAMP + -- Indicates if library-level objects should be accessed and updated using + -- universal addressing instructions on the AAMP architecture. This flag is + -- set to True when pragma Universal_Data is given as a configuration + -- pragma. + + Unreserve_All_Interrupts : Boolean := False; + -- GNAT, GNATBIND + -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma + -- appears anywhere in the main unit for GNAT, or if any ALI file has the + -- corresponding attribute set in GNATBIND. + + Upper_Half_Encoding : Boolean := False; + -- GNAT, GNATBIND + -- Normally set False, indicating that upper half ISO 8859-1 characters are + -- used in the normal way to represent themselves. If the wide character + -- encoding method uses the upper bit for this encoding, then this flag is + -- set True, and upper half characters in the source indicate the start of + -- a wide character sequence. Set by -gnatW or -W switches. + + Use_Include_Path_File : Boolean := False; + -- GNATMAKE, GPRBUILD + -- When True, create a source search path file, even when a mapping file + -- is used. + + Usage_Requested : Boolean := False; + -- GNAT, GNATBIND, GNATMAKE + -- Set to True if -h (-gnath for the compiler) switch encountered + -- requesting usage information + + Use_Expression_With_Actions : Boolean; + -- The N_Expression_With_Actions node has been introduced relatively + -- recently, and not all back ends are prepared to handle it yet. So + -- we use this flag to suppress its use during a transitional period. + -- Currently the default is False for all cases (set in gnat1drv). + -- The default can be modified using -gnatd.X/-gnatd.Y. + + Use_Pragma_Linker_Constructor : Boolean := False; + -- GNATBIND + -- True if pragma Linker_Constructor applies to adainit + + Use_VADS_Size : Boolean := False; + -- GNAT + -- Set to True if a valid pragma Use_VADS_Size is processed + + Validity_Checks_On : Boolean := True; + -- GNAT + -- This flag determines if validity checking is on or off. The initial + -- state is on, and the required default validity checks are active. The + -- actual set of checks that is performed if Validity_Checks_On is set is + -- defined by the switches in package Validsw. The Validity_Checks_On flag + -- is controlled by pragma Validity_Checks (On | Off), and also some + -- generated compiler code (typically code that has to do with validity + -- check generation) is compiled with this flag set to False. This flag is + -- set to False by the -gnatp switch. + + Verbose_Mode : Boolean := False; + -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, + -- GPRMAKE, GPRBUILD, GPRCLEAN + -- Set to True to get verbose mode (full error message text and location + -- information sent to standard output, also header, copyright and summary) + + type Verbosity_Level_Type is (None, Low, Medium, High); + pragma Ordered (Verbosity_Level_Type); + Verbosity_Level : Verbosity_Level_Type := High; + -- GNATMAKE, GPRMAKE + -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates + -- the level of verbosity of informational messages: + -- + -- In Low Verbosity, the reasons why a source is recompiled, the name + -- of the executable and the reason it must be rebuilt is output. + -- + -- In Medium Verbosity, additional lines are output for each ALI file + -- that is checked. + -- + -- In High Verbosity, additional lines are output when the ALI file + -- is part of an Ada library, is read-only or is part of the runtime. + + Warn_On_Ada_2005_Compatibility : Boolean := True; + -- GNAT + -- Set to True to generate all warnings on Ada 2005 compatibility issues, + -- including warnings on Ada 2005 obsolescent features used in Ada 2005 + -- mode. Set by default, modified by use of -gnatwy/Y. + + Warn_On_Ada_2012_Compatibility : Boolean := True; + -- GNAT + -- Set to True to generate all warnings on Ada 2012 compatibility issues, + -- including warnings on Ada 2012 obsolescent features used in Ada 2012 + -- mode. Modified by use of -gnatwy/Y. + + Warn_On_All_Unread_Out_Parameters : Boolean := False; + -- GNAT + -- Set to True to generate warnings in all cases where a variable is + -- modified by being passed as to an OUT formal, but the resulting value is + -- never read. The default is that this warning is suppressed. Modified + -- by use of gnatw.o/.O. + + Warn_On_Assertion_Failure : Boolean := True; + -- GNAT + -- Set to True to activate warnings on assertions that can be determined + -- at compile time will always fail. Modified by use of -gnatw.a/.A. + + Warn_On_Assumed_Low_Bound : Boolean := True; + -- GNAT + -- Set to True to activate warnings for string parameters that are indexed + -- with literals or S'Length, presumably assuming a lower bound of one. + -- Modified by use of -gnatww/W. + + Warn_On_Atomic_Synchronization : Boolean := False; + -- GNAT + -- Set to True to generate information messages for atomic synchronization. + -- Modified by use of -gnatw.n/.N. + + Warn_On_Bad_Fixed_Value : Boolean := False; + -- GNAT + -- Set to True to generate warnings for static fixed-point expression + -- values that are not an exact multiple of the small value of the type. + -- Odd by default, modified by use of -gnatwb/B. + + Warn_On_Biased_Representation : Boolean := True; + -- GNAT + -- Set to True to generate warnings for size clauses, component clauses + -- and component_size clauses that force biased representation. Modified + -- by use of -gnatw.b/.B. + + Warn_On_Constant : Boolean := False; + -- GNAT + -- Set to True to generate warnings for variables that could be declared + -- as constants. Modified by use of -gnatwk/K. + + Warn_On_Deleted_Code : Boolean := False; + -- GNAT + -- Set to True to generate warnings for code deleted by the front end + -- for conditional statements whose outcome is known at compile time. + -- Modified by use of -gnatwt/T. + + Warn_On_Dereference : Boolean := False; + -- GNAT + -- Set to True to generate warnings for implicit dereferences for array + -- indexing and record component access. Modified by use of -gnatwd/D. + + Warn_On_Export_Import : Boolean := True; + -- GNAT + -- Set to True to generate warnings for suspicious use of export or + -- import pragmas. Modified by use of -gnatwx/X. + + Warn_On_Hiding : Boolean := False; + -- GNAT + -- Set to True to generate warnings if a declared entity hides another + -- entity. The default is that this warning is suppressed. Modified by + -- use of -gnatwh/H. + + Warn_On_Modified_Unread : Boolean := False; + -- GNAT + -- Set to True to generate warnings if a variable is assigned but is never + -- read. Also controls warnings for similar cases involving out parameters, + -- but only if there is only one out parameter for the procedure involved. + -- The default is that this warning is suppressed, modified by use of + -- -gnatwm/M. + + Warn_On_No_Value_Assigned : Boolean := True; + -- GNAT + -- Set to True to generate warnings if no value is ever assigned to a + -- variable that is at least partially uninitialized. Set to false to + -- suppress such warnings. The default is that such warnings are enabled. + -- Modified by use of -gnatwv/V. + + Warn_On_Non_Local_Exception : Boolean := False; + -- GNAT + -- Set to True to generate warnings for non-local exception raises and also + -- handlers that can never handle a local raise. This warning is only ever + -- generated if pragma Restrictions (No_Exception_Propagation) is set. The + -- default is not to generate the warnings except that if the source has + -- at least one exception handler, and this restriction is set, and the + -- warning was not explicitly turned off, then it is turned on by default. + -- Modified by use of -gnatw.x/.X. + + No_Warn_On_Non_Local_Exception : Boolean := False; + -- GNAT + -- This is set to True if the above warning is explicitly suppressed. We + -- use this to avoid turning it on by default when No_Exception_Propagation + -- restriction is set and an exception handler is present. + + Warn_On_Object_Renames_Function : Boolean := False; + -- GNAT + -- Set to True to generate warnings when a function result is renamed as + -- an object. The default is that this warning is disabled. Modified by + -- use of -gnatw.r/.R. + + Warn_On_Obsolescent_Feature : Boolean := False; + -- GNAT + -- Set to True to generate warnings on use of any feature in Annex or if a + -- subprogram is called for which a pragma Obsolescent applies. Modified + -- by use of -gnatwj/J. + + Warn_On_Overlap : Boolean := False; + -- GNAT + -- Set to True to generate warnings when a writable actual overlaps with + -- another actual in a subprogram call. This applies only in modes before + -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. + -- Modified by use of -gnatw.i/.I. + + Warn_On_Questionable_Missing_Parens : Boolean := True; + -- GNAT + -- Set to True to generate warnings for cases where parentheses are missing + -- and the usage is questionable, because the intent is unclear. On by + -- default, modified by use of -gnatwq/Q. + + Warn_On_Parameter_Order : Boolean := False; + -- GNAT + -- Set to True to generate warnings for cases where the argument list for + -- a call is a sequence of identifiers that match the formal identifiers, + -- but are in the wrong order. + + Warn_On_Redundant_Constructs : Boolean := False; + -- GNAT + -- Set to True to generate warnings for redundant constructs (e.g. useless + -- assignments/conversions). The default is that this warning is disabled. + -- Modified by use of -gnatwr/R. + + Warn_On_Reverse_Bit_Order : Boolean := True; + -- GNAT + -- Set to True to generate warning (informational) messages for component + -- clauses that are affected by non-standard bit-order. The default is + -- that this warning is enabled. Modified by -gnatw.v/.V. + + Warn_On_Suspicious_Contract : Boolean := True; + -- GNAT + -- Set to True to generate warnings for suspicious contracts expressed as + -- pragmas or aspects precondition and postcondition. The default is that + -- this warning is enabled. Modified by use of -gnatw.t/.T. + + Warn_On_Suspicious_Modulus_Value : Boolean := True; + -- GNAT + -- Set to True to generate warnings for suspicious modulus values. The + -- default is that this warning is enabled. Modified by -gnatw.m/.M. + + Warn_On_Unchecked_Conversion : Boolean := True; + -- GNAT + -- Set to True to generate warnings for unchecked conversions that may have + -- non-portable semantics (e.g. because sizes of types differ). Modified + -- by use of -gnatwz/Z. + + Warn_On_Unordered_Enumeration_Type : Boolean := False; + -- GNAT + -- Set to True to generate warnings for inappropriate uses (comparisons + -- and explicit ranges) on unordered enumeration types (which includes + -- all enumeration types for which pragma Ordered is not given). The + -- default is that this warning is disabled. Modified by -gnat.u/.U. + + Warn_On_Unrecognized_Pragma : Boolean := True; + -- GNAT + -- Set to True to generate warnings for unrecognized pragmas. The default + -- is that this warning is enabled. Modified by use of -gnatwg/G. + + Warn_On_Unrepped_Components : Boolean := False; + -- GNAT + -- Set to True to generate warnings for the case of components of record + -- which have a record representation clause but this component does not + -- have a component clause. Modified by use of -gnatw.c/.C. + + Warn_On_Warnings_Off : Boolean := False; + -- GNAT + -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), + -- where either the pragma is never used, or it could be replaced by a + -- pragma Unmodified or Unreferenced. Modified by use of -gnatw.w/.W. + + type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); + Warning_Mode : Warning_Mode_Type := Normal; + -- GNAT, GNATBIND + -- Controls treatment of warning messages. If set to Suppress, warning + -- messages are not generated at all. In Normal mode, they are generated + -- but do not count as errors. In Treat_As_Error mode, warning messages + -- are generated and are treated as errors. + + Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; + -- GNAT, GNATBIND + -- Method used for encoding wide characters in the source program. See + -- description of type in unit System.WCh_Con for a list of the methods + -- that are currently supported. Note that brackets notation is always + -- recognized in source programs regardless of the setting of this + -- variable. The default setting causes only the brackets notation to be + -- recognized. If this is the main unit, this setting also controls the + -- output of the W=? parameter in the ALI file, which is used to provide + -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, + -- the value set here overrides this main unit default. + + Wide_Character_Encoding_Method_Specified : Boolean := False; + -- GNAT, GNATBIND + -- Set True if the value in Wide_Character_Encoding_Method was set as + -- a result of an explicit -gnatW? or -W? switch. False otherwise. + + Xref_Active : Boolean := True; + -- GNAT + -- Set if cross-referencing is enabled (i.e. xref info in ALI files) + + Zero_Formatting : Boolean := False; + -- GNATBIND + -- Do no formatting (no title, no leading spaces, no empty lines) in + -- auxiliary outputs (-e, -K, -l, -R). + + ---------------------------- + -- Configuration Settings -- + ---------------------------- + + -- These are settings that are used to establish the mode at the start of + -- each unit. The values defined below can be affected either by command + -- line switches, or by the use of appropriate configuration pragmas in a + -- configuration pragma file. + + Ada_Version_Config : Ada_Version_Type; + -- GNAT + -- This is the value of the configuration switch for the Ada 83 mode, as + -- set by the command line switches -gnat83/95/05, and possibly modified by + -- the use of configuration pragmas Ada_*. This switch is used to set the + -- initial value for Ada_Version mode at the start of analysis of a unit. + -- Note however that the setting of this flag is ignored for internal and + -- predefined units (which are always compiled in the most up to date + -- version of Ada). + + Ada_Version_Explicit_Config : Ada_Version_Type; + -- GNAT + -- This is set in the same manner as Ada_Version_Config. The difference is + -- that the setting of this flag is not ignored for internal and predefined + -- units, which for some purposes do indeed access this value, regardless + -- of the fact that they are compiled the most up to date ada version). + + Assertions_Enabled_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch for assertions enabled + -- mode, as possibly set by the command line switch -gnata, and possibly + -- modified by the use of the configuration pragma Assertion_Policy. + + Assume_No_Invalid_Values_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch for assuming "no invalid + -- values enabled" mode, as possibly set by the command line switch + -- -gnatB, and possibly modified by the use of the configuration pragma + -- Assume_No_Invalid_Values. + + Check_Float_Overflow_Config : Boolean; + -- GNAT + -- Set to True to check that operations on predefined unconstrained float + -- types (e.g. Float, Long_Float) do not overflow and generate infinities + -- or invalid values. Set by the Check_Float_Overflow pragma, or by use + -- of the -gnateF switch. + + Check_Policy_List_Config : Node_Id; + -- GNAT + -- This points to the list of N_Pragma nodes for Check_Policy pragmas + -- that are linked through the Next_Pragma fields, with the list being + -- terminated by Empty. The order is most recently processed first. This + -- list includes only those pragmas in configuration pragma files. + + Debug_Pragmas_Disabled_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch for debug pragmas disabled + -- mode, as possibly set by use of the configuration pragma Debug_Policy. + + Debug_Pragmas_Enabled_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch for debug pragmas enabled + -- mode, as possibly set by the command line switch -gnata and possibly + -- modified by the use of the configuration pragma Debug_Policy. + + Default_Pool_Config : Node_Id := Empty; + -- GNAT + -- Same as Default_Pool above, except this is only for Default_Storage_Pool + -- pragmas that are configuration pragmas. + + Dynamic_Elaboration_Checks_Config : Boolean := False; + -- GNAT + -- Set True for dynamic elaboration checking mode, as set by the -gnatE + -- switch or by the use of pragma Elaboration_Checking (Dynamic). + + Exception_Locations_Suppressed_Config : Boolean := False; + -- GNAT + -- Set True by use of the configuration pragma Suppress_Exception_Messages + + Extensions_Allowed_Config : Boolean; + -- GNAT + -- This is the flag that indicates whether extensions are allowed. It can + -- be set True either by use of the -gnatX switch, or by use of the + -- configuration pragma Extensions_Allowed (On). It is always set to True + -- for internal GNAT units, since extensions are always permitted in such + -- units. + + External_Name_Exp_Casing_Config : External_Casing_Type; + -- GNAT + -- This is the value of the configuration switch that controls casing of + -- external symbols for which an explicit external name is given. It can be + -- set to Uppercase by the command line switch -gnatF, and further modified + -- by the use of the configuration pragma External_Name_Casing in the + -- gnat.adc file. This flag is used to set the initial value for + -- External_Name_Exp_Casing at the start of analyzing each unit. Note + -- however that the setting of this flag is ignored for internal and + -- predefined units (which are always compiled with As_Is mode). + + External_Name_Imp_Casing_Config : External_Casing_Type; + -- GNAT + -- This is the value of the configuration switch that controls casing of + -- external symbols where the external name is implicitly given. It can be + -- set to Uppercase by the command line switch -gnatF, and further modified + -- by the use of the configuration pragma External_Name_Casing in the + -- gnat.adc file. This flag is used to set the initial value for + -- External_Name_Imp_Casing at the start of analyzing each unit. Note + -- however that the setting of this flag is ignored for internal and + -- predefined units (which are always compiled with Lowercase mode). + + Fast_Math_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that controls Fast_Math + -- mode, as set by a Fast_Math pragma in configuration pragmas. It is + -- used to set the initial value of Fast_Math at the start of each new + -- compilation unit. + + Initialize_Scalars_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that is set by the + -- pragma Initialize_Scalars when it appears in the gnat.adc file. + -- This switch is not set when the pragma appears ahead of a given + -- unit, so it does not affect the compilation of other units. + + Optimize_Alignment_Config : Character; + -- GNAT + -- This is the value of the configuration switch that controls the + -- alignment optimization mode, as set by an Optimize_Alignment pragma. + -- It is used to set the initial value of Optimize_Alignment at the start + -- of each new compilation unit, except that it is always set to 'O' (off) + -- for internal units. + + Persistent_BSS_Mode_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that controls whether + -- potentially persistent data is to be placed in the persistent_bss + -- section. It can be set True by use of the pragma Persistent_BSS. + -- This flag is used to set the initial value of Persistent_BSS_Mode + -- at the start of each compilation unit, except that it is always + -- set False for predefined units. + + Polling_Required_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that controls polling + -- mode. It can be set True by the command line switch -gnatP, and then + -- further modified by the use of pragma Polling in the gnat.adc file. This + -- flag is used to set the initial value for Polling_Required at the start + -- of analyzing each unit. + + Short_Descriptors_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that controls the use of + -- Short_Descriptors for setting descriptor default sizes. It can be set + -- True by the use of the pragma Short_Descriptors in the gnat.adc file. + -- This flag is used to set the initial value for Short_Descriptors at the + -- start of analyzing each unit. + + Use_VADS_Size_Config : Boolean; + -- GNAT + -- This is the value of the configuration switch that controls the use of + -- VADS_Size instead of Size wherever the attribute Size is used. It can + -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. + -- This flag is used to set the initial value for Use_VADS_Size at the + -- start of analyzing each unit. Note however that the setting of this flag + -- is ignored for internal and predefined units (which are always compiled + -- with the standard Size semantics). + + type Config_Switches_Type is private; + -- Type used to save values of the switches set from Config values + + procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); + -- This procedure saves the current values of the switches which are + -- initialized from the above Config values, and then resets these switches + -- according to the Config value settings. + + procedure Set_Opt_Config_Switches + (Internal_Unit : Boolean; + Main_Unit : Boolean); + -- This procedure sets the switches to the appropriate initial values. The + -- parameter Internal_Unit is True for an internal or predefined unit, and + -- affects the way the switches are set (see above). Main_Unit is true if + -- switches are being set for the main unit (this affects setting of the + -- assert/debug pragma switches, which are normally set false by default + -- for an internal unit, except when the internal unit is the main unit, + -- in which case we use the command line settings). + + procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); + -- This procedure restores a set of switch values previously saved by a + -- call to Save_Opt_Switches. + + procedure Register_Opt_Config_Switches; + -- This procedure is called after processing the gnat.adc file and other + -- configuration pragma files to record the values of the Config switches, + -- as possibly modified by the use of command line switches and pragmas + -- appearing in these files. + + ------------------------ + -- Other Global Flags -- + ------------------------ + + Expander_Active : Boolean := False; + -- A flag that indicates if expansion is active (True) or deactivated + -- (False). When expansion is deactivated all calls to expander routines + -- have no effect. Note that the initial setting of False is merely to + -- prevent saving of an undefined value for an initial call to the + -- Expander_Mode_Save_And_Set procedure. For more information on the use of + -- this flag, see package Expander. Indeed this flag might more logically + -- be in the spec of Expander, but it is referenced by Errout, and it + -- really seems wrong for Errout to depend on Expander. + -- + -- Note: for many purposes, it is more appropriate to test the flag + -- Full_Expander_Active, which also checks that Alfa mode is not active. + + Static_Dispatch_Tables : Boolean := True; + -- This flag indicates if the backend supports generation of statically + -- allocated dispatch tables. If it is True, then the front end will + -- generate static aggregates for dispatch tables that contain forward + -- references to addresses of subprograms not seen yet, and the back end + -- must be prepared to handle this case. If it is False, then the front + -- end generates assignments to initialize the dispatch table, and there + -- are no such forward references. By default we build statically allocated + -- dispatch tables for all library level tagged types in all platforms.This + -- behavior can be disabled using switch -gnatd.t which will set this flag + -- to False and revert to the previous dynamic behavior. + + ----------------------- + -- Tree I/O Routines -- + ----------------------- + + procedure Tree_Read; + -- Reads switch settings from current tree file using Tree_Read + + procedure Tree_Write; + -- Writes out switch settings to current tree file using Tree_Write + + -------------------------- + -- ASIS Version Control -- + -------------------------- + + -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) + -- are supposed to be used in the GNAT/ASIS version check performed in + -- the ASIS code (this package is also a part of the ASIS implementation). + -- They are set by Tree_Read procedure, so they represent the version + -- number (and the version string) of the compiler which has created the + -- tree, and they are supposed to be compared with the corresponding values + -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS + -- implementation. + + Tree_Version_String : String_Access; + -- Used to store the compiler version string read from a tree file to check + -- if it is from the same date as stored in the version string in Gnatvsn. + -- We require that ASIS Pro can be used only with GNAT Pro, but we allow + -- non-Pro ASIS and ASIS-based tools to be used with any version of the + -- GNAT compiler. Therefore, we need the possibility to compare the dates + -- of the corresponding source sets, using version strings that may be + -- of different lengths. + + Tree_ASIS_Version_Number : Int; + -- Used to store the ASIS version number read from a tree file to check if + -- it is the same as stored in the ASIS version number in Tree_IO. + + ----------------------------------- + -- Modes for Formal Verification -- + ----------------------------------- + + Alfa_Mode : Boolean := False; + -- Specific compiling mode targeting formal verification through the + -- generation of Why code for those parts of the input code that belong to + -- the Alfa subset of Ada. Set by debug flag -gnatd.F. + + Strict_Alfa_Mode : Boolean := False; + -- Interpret compiler permissions as strictly as possible. E.g. base ranges + -- for integers are limited to the strict minimum with this option. Set by + -- debug flag -gnatd.D. + + Formal_Extensions : Boolean := False; + -- When this flag is set, new aspects/pragmas/attributes are accepted, + -- whose main purpose is to facilitate formal verification. Set by debug + -- flag -gnatd.V. + + function Full_Expander_Active return Boolean; + pragma Inline (Full_Expander_Active); + -- Returns the value of (Expander_Active and not Alfa_Mode). This "flag" + -- indicates that expansion is fully active, that is, not in the reduced + -- mode for Alfa (True) or that expansion is either deactivated, or active + -- in the reduced mode for Alfa (False). For more information on full + -- expansion, see package Expander. For more information on reduced + -- Alfa expansion, see package Exp_Alfa. + +private + + -- The following type is used to save and restore settings of switches in + -- Opt that represent the configuration (i.e. result of config pragmas). + + -- Note that Ada_Version_Explicit is not included, since this is a sticky + -- flag that once set does not get reset, since the whole idea of this flag + -- is to record the setting for the main unit. + + type Config_Switches_Type is record + Ada_Version : Ada_Version_Type; + Ada_Version_Explicit : Ada_Version_Type; + Assertions_Enabled : Boolean; + Assume_No_Invalid_Values : Boolean; + Check_Float_Overflow : Boolean; + Check_Policy_List : Node_Id; + Debug_Pragmas_Disabled : Boolean; + Debug_Pragmas_Enabled : Boolean; + Default_Pool : Node_Id; + Dynamic_Elaboration_Checks : Boolean; + Exception_Locations_Suppressed : Boolean; + Extensions_Allowed : Boolean; + External_Name_Exp_Casing : External_Casing_Type; + External_Name_Imp_Casing : External_Casing_Type; + Fast_Math : Boolean; + Initialize_Scalars : Boolean; + Normalize_Scalars : Boolean; + Optimize_Alignment : Character; + Optimize_Alignment_Local : Boolean; + Persistent_BSS_Mode : Boolean; + Polling_Required : Boolean; + Short_Descriptors : Boolean; + Use_VADS_Size : Boolean; + end record; + + -- The following declarations are for GCC version dependent flags. We do + -- not let client code in the compiler test GCC_Version directly, but + -- instead use deferred constants for relevant feature tags. + + -- Note: there currently are no such constants defined in this section, + -- since the compiler front end is currently entirely independent of the + -- GCC version, which is a desirable state of affairs. + + function get_gcc_version return Int; + pragma Import (C, get_gcc_version, "get_gcc_version"); + + GCC_Version : constant Nat := get_gcc_version; + -- GNATMAKE + -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that + -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. + +end Opt; |