Mercurial > hg > CbC > CbC_gcc
view gcc/ada/opt.ads @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- O P T -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2019, 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, 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. Checksum_Accumulate_Limited_Checksum : Boolean := False; -- Used to control the computation of the limited view of a package. -- (Not currently used, possible optimization for ALI files of units -- in limited with_clauses). ---------------------------------------------- -- Settings of Modes for Current Processing -- ---------------------------------------------- -- The following mode values represent the current state of processing. -- The values set here are the default values. Unless otherwise noted, -- the value may be reset in Switch-? with an appropriate switch. In -- some cases, the values can also be modified by pragmas, and in the -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify -- the default values. Latest_Ada_Only : Boolean := False; -- If True, the only value valid for Ada_Version is Ada_Version_Type'Last, -- trying to specify other values will be ignored (in case of pragma -- Ada_xxx) or generate an error (in case of -gnat83/95/xx switches). type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012, Ada_2020); pragma Ordered (Ada_Version_Type); pragma Convention (C, Ada_Version_Type); -- Versions of Ada for Ada_Version below. Note that these are ordered, -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely -- what you want, because it will apply to future versions of the language. -- WARNING: There is a matching C declaration of this type in fe.h Ada_Version_Default : constant Ada_Version_Type := Ada_2012; pragma Warnings (Off, Ada_Version_Default); -- GNAT -- Default Ada version if no switch given. The Warnings off is to kill -- constant condition warnings. Ada_Version : Ada_Version_Type := Ada_Version_Default; -- GNAT -- Current Ada version for compiler, as set by configuration pragmas, -- compiler switches, or implicitly (to Ada_Version_Runtime) when a -- predefined or internal file is compiled. -- WARNING: There is a matching C declaration of this variable in fe.h Ada_Version_Pragma : Node_Id := Empty; -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used -- to specialize error messages complaining about the Ada version in use. Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; -- GNAT -- Like Ada_Version, but does not get set implicitly for predefined or -- internal units, so it reflects the Ada version explicitly set using -- configuration pragmas or compiler switches (or if neither appears, it -- remains set to Ada_Version_Default). This is used in the rare cases -- (notably pragma Obsolescent) where we want the explicit version set. Ada_Version_Runtime : Ada_Version_Type := Ada_2012; -- GNAT -- Ada version used to compile the runtime. Used to set Ada_Version (but -- not Ada_Version_Explicit) when compiling predefined or internal units. Ada_Final_Suffix : constant String := "final"; Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); -- GNATBIND -- The name of the procedure that performs the finalization at the end of -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. Ada_Init_Suffix : constant String := "init"; Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); -- GNATBIND -- The name of the procedure that performs initialization at the start -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. Ada_Main_Name_Suffix : constant String := "main"; -- GNATBIND -- The suffix for Ada_Main_Name. Defined as a constant here so that it -- can be referenced in a uniform manner to create either the default -- value of Ada_Main_Name (declared below), or the non-default name -- set by Gnatbind.Scan_Bind_Arg. Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); -- GNATBIND -- The name of the Ada package generated by the binder (when in Ada mode). -- This variable may be modified by Gnatbind.Scan_Bind_Arg. Address_Clause_Overlay_Warnings : Boolean := True; -- GNAT -- Set False to disable address clause warnings. Modified by use of -- -gnatwo/O. Address_Is_Private : Boolean := False; -- GNAT, GNATBIND -- Set True if package System has the line "type Address is private;" Aggregate_Individually_Assign : Boolean := False; -- GNAT -- Set True if record aggregates are to be always converted into assignment -- statements. Set through the corresponding pragma. All_Errors_Mode : Boolean := False; -- GNAT -- Flag set to force display of multiple errors on a single line and -- also repeated error messages for references to undefined identifiers -- and certain other repeated error messages. Set by use of -gnatf. Allow_Integer_Address : Boolean := False; -- GNAT -- Allow use of integer expression in a context requiring System.Address. -- Set by the use of configuration pragma Allow_Integer_Address Also set -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. All_Sources : Boolean := False; -- GNATBIND -- Set to True to require all source files to be present. This flag is -- directly modified by gnatmake to affect the shared binder routines. Alternate_Main_Name : String_Ptr := null; -- GNATBIND -- Set to non-null when Bind_Alternate_Main_Name is True. This value -- is modified as needed by Gnatbind.Scan_Bind_Arg. ASIS_GNSA_Mode : Boolean := False; -- GNAT -- Enable GNSA back-end processing assuming ASIS_Mode is already set to -- True. ASIS_GNSA mode suppresses the call to gigi. 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 -- Indicates default policy (True = Check, False = Ignore) to be applied -- to all assertion aspects and pragmas, and to pragma Debug, if there is -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. -- Set True by use of -gnata. Assume_No_Invalid_Values : Boolean := False; -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end -- assumes that values could have invalid representations, unless it can -- clearly prove that the values are valid. If this switch is set (by -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values -- are valid and in range of their representations. This feature is now -- fully enabled in the compiler. Back_Annotate_Rep_Info : Boolean := False; -- GNAT -- If set True, enables back annotation of representation information -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR -- (list representation information) 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. Back_End_Inlining : Boolean := False; -- GNAT -- Set True to activate inlining by back-end expansion. This is the normal -- default mode for gcc targets, so it is True on such targets unless the -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the -- exact conditions for setting this switch. -- WARNING: There is a matching C declaration of this variable in fe.h Bind_Alternate_Main_Name : Boolean := False; -- GNATBIND -- True if main should be called Alternate_Main_Name.all. -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. Bind_Main_Program : Boolean := True; -- GNATBIND -- Set to False if not binding main Ada program Bind_For_Library : Boolean := False; -- GNATBIND -- Set to True if the binder needs to generate a file designed for building -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. Bind_Only : Boolean := False; -- GNATMAKE, GPRBUILD -- Set to True to skip compile and link steps -- (except when Compile_Only and/or Link_Only are True). Blank_Deleted_Lines : Boolean := False; -- GNAT, GNATPREP -- Output empty lines for each line of preprocessed input that is deleted -- in the output, including preprocessor lines starting with a '#'. Brief_Output : Boolean := False; -- GNAT, GNATBIND -- Force brief error messages to standard error, even if verbose mode is -- set (so that main error messages go to standard output). Build_Bind_And_Link_Full_Project : Boolean := False; -- GNATMAKE -- Set to True to build, bind and link all the sources of a project file -- (switch -B) Check_Aliasing_Of_Parameters : Boolean := False; -- GNAT -- Set to True to detect whether subprogram parameters and function results -- alias the same object(s). Check_Float_Overflow : Boolean := False; -- GNAT -- Set to True to check that operations on predefined unconstrained float -- types (e.g. Float, Long_Float) do not overflow and generate infinities -- or invalid values. Set by the Check_Float_Overflow pragma, or by use -- of the -gnateF switch. Check_Object_Consistency : Boolean := False; -- GNATBIND, GNATMAKE -- Set to True to check whether every object file is consistent with its -- corresponding ada library information (ALI) file. An object file is -- inconsistent with the corresponding ALI file if the object file does -- not exist or if it has an older time stamp than the ALI file. Default -- above is for GNATBIND. GNATMAKE overrides this default to True (see -- Make.Initialize) since we normally do need to check source consistencies -- in gnatmake. Check_Only : Boolean := False; -- GNATBIND -- Set to True to do checks only, no output of binder file Check_Policy_List : Node_Id := Empty; -- GNAT -- This points to the list of N_Pragma nodes for Check_Policy pragmas -- that are linked through the Next_Pragma fields, with the list being -- terminated by Empty. The order is most recently processed first. Note -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value -- of this variable, implementing the required scope control for pragmas -- appearing in a declarative part. Check_Readonly_Files : Boolean := False; -- GNATMAKE -- Set to True to check readonly files during the make process Check_Source_Files : Boolean := True; -- GNATBIND, GNATMAKE -- Set to True to enable consistency checking for any source files that -- are present (i.e. date must match the date in the library info file). -- Set to False for object file consistency check only. This flag is -- directly modified by gnatmake, to affect the shared binder routines. Check_Switches : Boolean := False; -- GNATMAKE, GPBUILD -- Set to True to check compiler options during the make process Check_Unreferenced : Boolean := False; -- GNAT -- Set to True to enable checking for unreferenced entities other -- than formal parameters (for which see Check_Unreferenced_Formals) -- Modified by use of -gnatwu/U. Check_Unreferenced_Formals : Boolean := False; -- GNAT -- Set to True to check for unreferenced formals. This is turned on by -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. Check_Validity_Of_Parameters : Boolean := False; -- GNAT -- Set to True to check for proper scalar initialization of subprogram -- parameters on both entry and exit. This is turned on by -gnateV. Check_Withs : Boolean := False; -- GNAT -- Set to True to enable checking for unused withs, and also the case -- of withing a package and using none of the entities in the package. -- Modified by use of -gnatwu/U. CodePeer_Mode : Boolean := False; -- GNAT, GNATBIND, GPRBUILD -- Enable full CodePeer mode (SCIL generation, disable switches that -- interact badly with it, etc...). This is turned on by -gnatC. Commands_To_Stdout : Boolean := False; -- GNATMAKE -- True if echoed commands to be written to stdout instead of stderr Comment_Deleted_Lines : Boolean := False; -- GNATPREP -- True if source lines removed by the preprocessor should be commented -- in the output file. Compilation_Time : String (1 .. 19); -- GNAT -- Compilation date and time in form YYYY-MM-DD HH:MM:SS Compile_Only : Boolean := False; -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN -- GNATMAKE, GPRBUILD: -- set True to skip bind and link steps (except when Bind_Only is True) -- GNATCLEAN, GPRCLEAN: -- set True to delete only the files produced by the compiler but not the -- library files or the executable files. Compiler_Unit : Boolean := False; -- GNAT1 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays -- True, since any units that are with'ed directly or indirectly by -- a Compiler_Unit_Warning main unit are subject to the same restrictions. -- Such units really should have their own pragmas, but we do not bother to -- check for that, so this transitivity provides extra checking. Config_File : Boolean := True; -- GNAT -- Set to False to inhibit reading and processing of gnat.adc file Config_File_Names : String_List_Access := null; -- GNAT -- Names of configuration pragmas files (given by switches -gnatec) Configurable_Run_Time_Mode : Boolean := False; -- GNAT, GNATBIND -- Set True if the compiler is operating in configurable run-time mode. -- This happens if the flag Targparm.Configurable_Run_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 -- Set to True (-C switch) to indicate that the compiler will be invoked -- with a mapping file (-gnatem compiler switch). subtype Debug_Level_Value is Nat range 0 .. 3; Debugger_Level : Debug_Level_Value := 0; -- GNAT, GNATBIND -- The value given to the -g parameter. The default value for -g with -- no value is 2. If no -g is specified, defaults to 0. -- Note that the generated code should never depend on this variable, -- since we want debug info to be nonintrusive on the generate code. Default_Exit_Status : Int := 0; -- GNATBIND -- Set the default exit status value. Set by the -Xnnn switch for the -- binder. Debug_Generated_Code : Boolean := False; -- GNAT -- Set True (-gnatD switch) to debug generated expanded code instead -- of the original source code. Causes debugging information to be -- written with respect to the generated code file that is written. -- WARNING: There is a matching C declaration of this variable in fe.h Default_Pool : Node_Id := Empty; -- GNAT -- Used to record the storage pool name (or null literal) that is the -- argument of an applicable pragma Default_Storage_Pool. -- Empty: No pragma Default_Storage_Pool applies. -- N_Null node: "pragma Default_Storage_Pool (null);" applies. -- otherwise: "pragma Default_Storage_Pool (X);" applies, and -- this points to the name X. -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. No_Stack_Size : constant := -1; Default_Stack_Size : Int := No_Stack_Size; -- GNATBIND -- Set to default primary stack size in units of bytes. Set by the -dnnn -- switch for the binder. A value of No_Stack_Size indicates that -- no default was set by the binder. Default_Sec_Stack_Size : Int := No_Stack_Size; -- GNATBIND -- Set to default secondary stack size in units of bytes. Set by the -Dnnn -- switch for the binder. A value of No_Stack_Size indicates that no -- default was set by the binder and the run-time value should be used -- instead. Default_SSO : Character := ' '; -- GNAT -- Set if a pragma Default_Scalar_Storage_Order has been given. The value -- of ' ' indicates that no default has been set, otherwise the value is -- either 'H' for High_Order_First or 'L' for Lower_Order_First. Detect_Blocking : Boolean := False; -- GNAT -- Set True to force the run time to raise Program_Error if calls to -- potentially blocking operations are detected from protected actions. Directories_Must_Exist_In_Projects : Boolean := True; -- PROJECT MANAGER -- Set to False with switch -f of gnatclean and gprclean Display_Compilation_Progress : Boolean := False; -- GNATMAKE, GPRBUILD -- Set True (-d switch) to display information on progress while compiling -- files. Internal flag to be used in conjunction with an IDE -- (e.g GNAT Studio). type Distribution_Stub_Mode_Type is -- GNAT (No_Stubs, -- Normal mode, no generation of distribution stubs Generate_Receiver_Stub_Body, -- The unit being compiled is the RCI body, and the compiler will -- generate the body for the receiver stubs and compile it. Generate_Caller_Stub_Body); -- The unit being compiled is the RCI spec, and the compiler will -- generate the body for the caller stubs and compile it. Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; -- GNAT -- This enumeration variable indicates the three states of distribution -- annex stub generation. Do_Not_Execute : Boolean := False; -- GNATMAKE -- Set to True if no actual compilations should be undertaken Dump_Source_Text : Boolean := False; -- GNAT -- Set to True (by -gnatL) to dump source text intermingled with generated -- code. Effective only if either of Debug/Print_Generated_Code is true. Dynamic_Elaboration_Checks : Boolean := False; -- GNAT -- Set True for dynamic elaboration checking mode, as set by the -gnatE -- switch or by the use of pragma Elaboration_Checks (Dynamic). Dynamic_Stack_Measurement : Boolean := False; -- GNATBIND -- Set True to enable dynamic stack measurement (-u flag for gnatbind) Dynamic_Stack_Measurement_Array_Size : Nat := 100; -- GNATBIND -- Number of measurements we want to store during dynamic stack analysis. -- When the buffer is full, non-storable results will be output on the fly. -- The value is relevant only if Dynamic_Stack_Measurement is set. Set -- by processing of -u flag for gnatbind. Elab_Dependency_Output : Boolean := False; -- GNATBIND -- Set to True to output complete list of elaboration constraints Elab_Order_Output : Boolean := False; -- GNATBIND -- Set to True to output chosen elaboration order Elab_Info_Messages : Boolean := False; -- GNAT -- Set to True to output info messages for static elabmodel (-gnatel) Elab_Warnings : Boolean := True; -- GNAT -- Set to True to generate elaboration warnings (-gnatwl). The warnings are -- enabled by default because they carry the same importance as errors. The -- compiler cannot emit actual errors because elaboration diagnostics need -- dataflow analysis, which is not available. This behavior parallels that -- of the old ABE mechanism. Error_Msg_Line_Length : Nat := 0; -- GNAT -- Records the error message line length limit. If this is set to zero, -- then we get the old style behavior, in which each call to the error -- message routines generates one line of output as a separate message. -- If it is set to a non-zero value, then continuation lines are folded -- to make a single long message, and then this message is split up into -- multiple lines not exceeding the specified length. Set by -gnatj=nn. Error_To_Warning : Boolean := False; -- GNAT -- If True, then certain error messages (e.g. parameter overlap messages -- for procedure calls in Ada 2012 mode) are treated as warnings instead -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning -- will identify affected messages. Exception_Handler_Encountered : Boolean := False; -- GNAT -- This flag is set true if the parser encounters an exception handler. -- It is used to set Warn_On_Exception_Propagation True if the restriction -- No_Exception_Propagation is set. Exception_Extra_Info : Boolean := False; -- GNAT -- True when switch -gnateE is used. When True, generate extra information -- associated with exception messages (in particular range and index -- checks). -- WARNING: There is a matching C declaration of this variable in fe.h Exception_Locations_Suppressed : Boolean := False; -- GNAT -- Set to True if a Suppress_Exception_Locations configuration pragma is -- currently active. -- WARNING: There is a matching C declaration of this variable in fe.h type Exception_Mechanism_Type is -- Determines the kind of mechanism used to handle exceptions -- (Front_End_SJLJ, -- Exceptions use setjmp/longjmp generated explicitly by the front end -- (this includes gigi or other equivalent parts of the code generator). -- AT END handlers are converted into exception handlers by the front -- end in this mode. Back_End_ZCX, -- Exceptions are handled by the back end. The front end simply -- generates the handlers as they appear in the source, and AT END -- handlers are left untouched (they are not converted into exception -- handlers when operating in this mode). Propagation is performed -- using a frame unwinding scheme and requires no particular setup code -- at handler sites on regular execution paths. Back_End_SJLJ); -- Similar to Back_End_ZCX with respect to the front-end processing -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to -- propagate and setup handler contexts on regular execution paths. pragma Convention (C, Exception_Mechanism_Type); -- WARNING: There is a matching C declaration of this type in fe.h Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ; -- GNAT -- Set to the appropriate value depending on the flags in system.ads -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to -- allow access by gigi. -- WARNING: There is a matching C declaration of this variable in fe.h function Back_End_Exceptions return Boolean; function Front_End_Exceptions return Boolean; function ZCX_Exceptions return Boolean; function SJLJ_Exceptions return Boolean; -- GNAT -- Various properties of the active Exception_Mechanism -- WARNING: There is a matching C declaration of these subprograms in fe.h Exception_Tracebacks : Boolean := False; -- GNATBIND -- Set to True to store tracebacks in exception occurrences (-Ea or -E) Exception_Tracebacks_Symbolic : Boolean := False; -- GNATBIND -- Set to True to store tracebacks in exception occurrences and enable -- symbolic tracebacks (-Es). Expand_Nonbinary_Modular_Ops : Boolean := False; -- Set to True to convert nonbinary modular additions into code -- that relies on the front-end expansion of operator Mod. Extensions_Allowed : Boolean := False; -- GNAT -- Set to True by switch -gnatX if GNAT specific language extensions -- are allowed. Currently there are no such defined extensions. type External_Casing_Type is ( As_Is, -- External names cased as they appear in the Ada source Uppercase, -- External names forced to all uppercase letters Lowercase); -- External names forced to all lowercase letters External_Name_Imp_Casing : External_Casing_Type := Lowercase; -- GNAT -- The setting of this flag determines the casing of external names -- when the name is implicitly derived from an entity name (i.e. either -- no explicit External_Name or Link_Name argument is used, or, in the -- case of extended DEC pragmas, the external name is given using an -- identifier. The As_Is setting is not permitted here (since this would -- create Ada source programs that were case sensitive). External_Name_Exp_Casing : External_Casing_Type := As_Is; -- GNAT -- The setting of this flag determines the casing of an external name -- specified explicitly with a string literal. As_Is means the string -- literal is used as given with no modification to the casing. If -- Lowercase or Uppercase is set, then the string is forced to all -- lowercase or all uppercase letters as appropriate. Note that this -- setting has no effect if the external name is given using an identifier -- in the case of extended DEC import/export pragmas (in this case the -- casing is controlled by External_Name_Imp_Casing), and also has no -- effect if an explicit Link_Name is supplied (a link name is always -- used exactly as given). External_Unit_Compilation_Allowed : Boolean := False; -- GNATMAKE -- When True (set by gnatmake switch -x), allow compilation of sources -- that are not part of any project file. Fast_Math : Boolean := False; -- GNAT -- Indicates the current setting of Fast_Math mode, as set by the use -- of a Fast_Math pragma (set True by Fast_Math (On)). Force_ALI_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. Set on by use of -gnatQ. Disable_ALI_File : Boolean := False; -- GNAT -- Disable generation of ALI file Follow_Links_For_Files : Boolean := False; -- PROJECT MANAGER -- Set to True (-eL) to process the project files in trusted mode. If -- Follow_Links is False, it is assumed that the project doesn't contain -- any file duplicated through symbolic links (although the latter are -- still valid if they point to a file which is outside of the project), -- and that no directory has a name which is a valid source name. Follow_Links_For_Dirs : Boolean := False; -- PROJECT MANAGER -- Set to True if directories can be links in this project, and therefore -- additional system calls must be performed to ensure that we always see -- the same full name for each directory. Force_Checking_Of_Elaboration_Flags : Boolean := False; -- GNATBIND -- True if binding with forced checking of the elaboration flags -- (-F switch set). Force_Compilations : Boolean := False; -- GNATMAKE, GPRBUILD -- Set to force recompilations even when the objects are up-to-date. Force_Elab_Order_File : String_Ptr := null; -- GNATBIND -- File name specified for -f switch (the forced elaboration order file) Front_End_Inlining : Boolean := False; -- GNAT -- Set True to activate inlining by front-end expansion (even on GCC -- targets, where inlining is normally handled by the back end). Set by -- the flag -gnatN (which is now considered obsolescent, since the GCC -- back end can do a better job of inlining than the front end these days). Full_Path_Name_For_Brief_Errors : Boolean := False; -- PROJECT MANAGER -- When True, in Brief_Output mode, each error message line will start with -- the full path name of the source. When False, only the file name without -- directory information is used. Full_List : Boolean := False; -- GNAT -- Set True to generate full source listing with embedded errors Full_List_File_Name : String_Ptr := null; -- GNAT -- Set to file name to generate full source listing to named file (or if -- the name is of the form .xxx, then to name.xxx where name is the source -- file name with extension stripped. Generate_C_Code : Boolean := False; -- GNAT, GNATBIND -- If True, the Cprint circuitry to generate C code output is activated. -- Set True by use of -gnateg or -gnatd.V for GNAT, and -G for GNATBIND. Generate_CodePeer_Messages : Boolean := False; -- GNAT -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is -- turned on by -gnateC. Generate_Processed_File : Boolean := False; -- GNAT -- True when switch -gnateG is used. When True, create in a file -- <source>.prep, if the source is preprocessed. Generate_SCIL : Boolean := False; -- GNAT -- Set True to activate SCIL code generation. Generate_SCO : Boolean := False; -- GNAT -- True when switch -fdump-scos (or -gnateS) is used. When True, Source -- Coverage Obligation (SCO) information is generated and output in the ALI -- file. See unit Par_SCO for full details. Generate_SCO_Instance_Table : Boolean := False; -- GNAT -- True when switch -fdump-scos is used. When True, a table of instances is -- included in SCOs. -- WARNING: There is a matching C declaration of this variable in fe.h Generating_Code : Boolean := False; -- GNAT -- True if the frontend finished its work and has called the backend to -- process the tree and generate the object file. type Ghost_Mode_Type is (None, Check, Ignore); -- Possible legal modes that can be set by aspect/pragma Ghost as well as -- value None, which indicates that no such aspect/pragma applies. Ghost_Mode : Ghost_Mode_Type := None; -- GNAT -- The current Ghost mode in effect Global_Discard_Names : Boolean := False; -- GNAT, GNATBIND -- True if a pragma Discard_Names appeared as a configuration pragma for -- the current compilation unit. GNAT_Encodings : Int; pragma Import (C, GNAT_Encodings, "gnat_encodings"); -- Constant controlling the balance between GNAT encodings and standard -- DWARF to emit in the debug information. It accepts the following values. DWARF_GNAT_Encodings_All : constant Int := 0; DWARF_GNAT_Encodings_GDB : constant Int := 1; DWARF_GNAT_Encodings_Minimal : constant Int := 2; Identifier_Character_Set : Character; -- GNAT -- This variable indicates the character set to be used for identifiers. -- The possible settings are: -- '1' Latin-1 (ISO-8859-1) -- '2' Latin-2 (ISO-8859-2) -- '3' Latin-3 (ISO-8859-3) -- '4' Latin-4 (ISO-8859-4) -- '5' Latin-Cyrillic (ISO-8859-5) -- '9' Latin-9 (ISO-8859-15) -- 'p' PC (US, IBM page 437) -- '8' PC (European, IBM page 850) -- 'f' Full upper set (all distinct) -- 'n' No upper characters (Ada 83 rules) -- 'w' Latin-1 plus wide characters allowed in identifiers -- -- The setting affects the set of letters allowed in identifiers and the -- upper/lower case equivalences. It does not affect the interpretation of -- character and string literals, which are always stored using the actual -- coding in the source program. This variable is initialized to the -- default value appropriate to the system (in Osint.Initialize), and then -- reset if a command line switch is used to change the setting. Ignore_Rep_Clauses : Boolean := False; -- GNAT -- Set True to ignore all representation clauses. Useful when compiling -- code from foreign compilers for checking or ASIS purposes. Can be -- set True by use of -gnatI. Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False; -- GNAT -- Set True to ignore the semantics and effects of pragma SPARK_Mode when -- the pragma appears inside an instance whose enclosing context is subject -- to SPARK_Mode "off". This property applies to nested instances. Ignore_Style_Checks_Pragmas : Boolean := False; -- GNAT -- Set True to ignore all Style_Checks pragmas. Can be set True by use -- of -gnateY. Ignore_Unrecognized_VWY_Switches : Boolean := False; -- GNAT -- Set True to ignore unrecognized y, V, w switches. Can be set True by -- use of -gnateu, causing subsequent unrecognized switches to result in -- a warning rather than an error. Ignored_Ghost_Region : Node_Id := Empty; -- GNAT -- The start of the current ignored Ghost region. This value must always -- reflect the starting node of the outermost ignored Ghost region. If a -- nested ignored Ghost region is entered, the value must remain unchanged. Implementation_Unit_Warnings : Boolean := True; -- GNAT -- Set True to active warnings for use of implementation internal units. -- Modified by use of -gnatwi/-gnatwI. Implicit_Packing : Boolean := False; -- GNAT -- If set True, then a Size attribute clause on an array is allowed to -- cause implicit packing instead of generating an error message. Set by -- use of pragma Implicit_Packing. Include_Subprogram_In_Messages : Boolean := False; -- GNAT -- Set True to include the enclosing subprogram in compiler messages. Ineffective_Inline_Warnings : Boolean := False; -- GNAT -- Set True to activate warnings if front-end inlining (-gnatN) is not able -- to actually inline a particular call (or all calls). Can be controlled -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if -- frontend inlining is not able to inline a subprogram expected to -- be inlined in GNATprove mode. Init_Or_Norm_Scalars : Boolean := False; -- GNAT, GNATBIND -- Set True if a pragma Initialize_Scalars applies to the current unit. -- Also set True if a pragma Restriction (Normalize_Scalars) applies. Initialize_Scalars : Boolean := False; -- GNAT -- Set True if a pragma Initialize_Scalars applies to the current unit. -- Note that Init_Or_Norm_Scalars is also set to True if this is True. Initialize_Scalars_Mode1 : Character := 'I'; Initialize_Scalars_Mode2 : Character := 'N'; -- GNATBIND -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default -- is IN (invalid values), used if no -S switch is used. Inline_Active : Boolean := False; -- GNAT -- Set True to activate pragma Inline processing across modules. Default -- for now is not to inline across module boundaries. Inline_Level : Nat := 0; -- GNAT -- Set to indicate the inlining level: 0 means that an appropriate value is -- to be computed by the compiler based on the optimization level (-gnatn), -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full -- inlining across modules (-gnatn2). Interface_Library_Unit : Boolean := False; -- GNATBIND -- Set to True to indicate that at least one ALI file is an interface ALI: -- then elaboration flag checks are to be generated in the binder -- generated file. Invalid_Value_Used : Boolean := False; -- GNAT -- Set True if a valid Invalid_Value attribute is encountered Inline_Processing_Required : Boolean := False; -- GNAT -- Set True if inline processing is required. Inline processing is required -- if an active Inline pragma is processed. The flag is set for a pragma -- Inline or Inline_Always that is actually active. In_Place_Mode : Boolean := False; -- GNATMAKE -- Set True to store ALI and object files in place i.e. in the object -- directory if these files already exist or in the source directory -- if not. Keep_Going : Boolean := False; -- GNATMAKE, GPRBUILD -- When True signals to ignore compilation errors and keep processing -- sources until there is no more work. Keep_Temporary_Files : Boolean := False; -- GNATCMD, GNATMAKE, GPRBUILD -- When True the temporary files are not deleted. Set by switches -dn or -- --keep-temp-files. Leap_Seconds_Support : Boolean := False; -- GNATBIND -- Set to True to enable leap seconds support in Ada.Calendar and its -- children. Legacy_Elaboration_Checks : Boolean := False; -- GNAT -- Set to True when the pre-18.x access-before-elaboration model is to be -- used. Modified by use of -gnatH. Legacy_Elaboration_Order : Boolean := False; -- GNATBIND -- Set to True when the pre-20.x elaboration-order model is to be used. -- Modified by use of -H. Link_Only : Boolean := False; -- GNATMAKE, GPRBUILD -- Set to True to skip compile and bind steps (except when Bind_Only is -- set to True). List_Body_Required_Info : Boolean := False; -- GNATMAKE -- List info messages about why a package requires a body. Modified by use -- of -gnatw.y/.Y. List_Inherited_Aspects : Boolean := False; -- GNAT -- List inherited invariants, preconditions, and postconditions from -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited -- subtype predicates. Modified by use of -gnatw.l/.L. List_Restrictions : Boolean := False; -- GNATBIND -- Set to True to list restrictions pragmas that could apply to partition List_Units : Boolean := False; -- GNAT -- List units in the active library for a compilation (-gnatu switch) List_Closure : Boolean := False; -- GNATBIND -- List all sources in the closure of a main (-R or -Ra gnatbind switch) List_Closure_All : Boolean := False; -- GNATBIND -- List all sources in closure of main including run-time units (-Ra -- gnatbind switch). List_Dependencies : Boolean := False; -- GNATMAKE -- When True gnatmake verifies that the objects are up to date and outputs -- the list of object dependencies (-M switch). Output depends if -a switch -- is used or not. This list can be used directly in a Makefile. List_Representation_Info : Int range 0 .. 4 := 0; -- GNAT -- Set non-zero by -gnatR switch to list representation information. -- The settings are as follows: -- -- 0 = no listing of representation information (default as above) -- 1 = list rep info for user-defined record and array types -- 2 = list rep info for all user-defined types and objects -- 3 = like 2, but variable fields are decoded symbolically -- 4 = like 3, but list rep info for relevant compiler-generated types -- WARNING: There is a matching C declaration of this variable in fe.h List_Representation_Info_To_File : Boolean := False; -- GNAT -- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m to be -- written to file.rep (where file is the name of the source file) instead -- of stdout. For example, if file x.adb is compiled using -gnatR2s then -- representation info is written to x.adb.ref. List_Representation_Info_To_JSON : Boolean := False; -- GNAT -- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be -- output in the JSON data interchange format. List_Representation_Info_Mechanisms : Boolean := False; -- GNAT -- Set true by -gnatRm switch. Causes information on mechanisms to be -- included in the representation output information. List_Representation_Info_Extended : Boolean := False; -- GNAT -- Set true by -gnatRe switch. Causes extended information for record types -- to be included in the representation output information. List_Preprocessing_Symbols : Boolean := False; -- GNAT, GNATPREP -- Set to True if symbols for preprocessing a source are to be listed -- before preprocessing occurs. Set to True by switch -s of gnatprep or -- -s in preprocessing data file for the compiler. 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). Otherwise -- set based on the pragma Locking_Policy: -- Ceiling_Locking: 'C' -- Concurrent_Readers_Locking: 'R' -- Inheritance_Locking: 'I' Locking_Policy_Sloc : Source_Ptr := No_Location; -- GNAT, GNATBIND -- Remember location of previous Locking_Policy pragma. This is used for -- inconsistency error messages. A value of System_Location is used if the -- policy is set in package System. Look_In_Primary_Dir : Boolean := True; -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN -- Set to False if a -I- was present on the command line. When True we are -- allowed to look in the primary directory to locate other source or -- library files. Make_Steps : Boolean := False; -- GNATMAKE -- Set to True when either Compile_Only, Bind_Only or Link_Only is -- set to True. Main_Index : Int := 0; -- GNATMAKE -- This is set to non-zero by gnatmake switch -eInnn to indicate that -- the main program is the nnn unit in a multi-unit source file. Mapping_File_Name : String_Ptr := null; -- GNAT -- File name of mapping between unit names, file names and path names. -- (given by switch -gnatem) Maximum_Messages : Int := 9999; -- GNAT, GNATBIND -- Maximum default number of errors before compilation is terminated, or in -- the case of GNAT, maximum number of warnings before further warnings are -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. Maximum_File_Name_Length : Int; -- GNAT, GNATBIND -- Maximum number of characters allowed in a file name, not counting the -- extension, as set by the appropriate switch. If no switch is given, -- then this value is initialized by Osint to the appropriate value. Maximum_Instantiations : Int := 8000; -- GNAT -- Maximum number of instantiations permitted (to stop runaway cases -- of nested instantiations). These situations probably only occur in -- specially concocted test cases. Can be modified by -gnateinn switch. Maximum_Processes : Positive := 1; -- GNATMAKE, GPRBUILD -- Maximum number of processes that should be spawned to carry out -- compilations. Minimal_Binder : Boolean := False; -- GNATBIND -- Set to True to suppress the generation of objects by the binder that -- are not strictly required for a program to run. Intended for ZFP -- applications that have tight memory constraints. Minimal_Recompilation : Boolean := False; -- GNATMAKE -- Set to True if minimal recompilation mode requested Minimize_Expression_With_Actions : Boolean := False; -- GNAT -- If True, minimize the use of N_Expression_With_Actions node. -- This can be used in particular on some back-ends where this node is -- difficult to support. Modify_Tree_For_C : Boolean := False; -- GNAT -- If this switch is set True (currently it is set only by -gnatd.V), then -- certain meaning-preserving transformations are applied to the tree to -- make it easier to interface with back ends that implement C semantics. -- There is a section in Sinfo which describes the transformations made. Multiple_Unit_Index : Int := 0; -- GNAT -- This is set non-zero if the current unit is being compiled in multiple -- unit per file mode, meaning that the current unit is selected from the -- sequence of units in the current source file, using the value stored -- in this variable (e.g. 2 = select second unit in file). A value of -- zero indicates that we are in normal (one unit per file) mode. No_Backup : Boolean := False; -- GNATNAME -- Do not create backup copies of project files. Set by switch --no-backup. No_Component_Reordering : Boolean := False; -- GNAT -- Set True if pragma No_Component_Reordering with no parameter encountered No_Deletion : Boolean := False; -- GNATPREP -- Set by preprocessor switch -a. Do not eliminate any source text. Implies -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all -- branches of #if constructs. No_Elab_Code_All_Pragma : Node_Id := Empty; -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered -- in the spec of the extended main unit. Used to determine if we need to -- do special tests for violation of this aspect. No_Heap_Finalization_Pragma : Node_Id := Empty; -- GNAT -- Set to point to a No_Heap_Finalization pragma defined in a configuration -- file. No_Main_Subprogram : Boolean := False; -- GNATMAKE, GNATBIND -- Set to True if compilation/binding of a program without main -- subprogram requested. No_Run_Time_Mode : Boolean := False; -- GNAT, GNATBIND -- This flag is set True if a No_Run_Time pragma is encountered. See spec -- of Rtsfind for a full description of handling of this pragma. No_Split_Units : Boolean := False; -- GPRBUILD -- Set to True with switch --no-split-units. When True, unit sources, spec, -- body and subunits, must all be in the same project. This is checked -- after each compilation. No_Stdinc : Boolean := False; -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF -- Set to True if no default source search dirs added to search list. No_Stdlib : Boolean := False; -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF -- Set to True if no default library search dirs added to search list. No_Strict_Aliasing : Boolean := False; -- GNAT -- Set True if pragma No_Strict_Aliasing with no parameters encountered. -- WARNING: There is a matching C declaration of this variable in fe.h No_Tagged_Streams : Node_Id := Empty; -- GNAT -- If a pragma No_Tagged_Streams is active for the current scope, this -- points to the corresponding pragma. Normalize_Scalars : Boolean := False; -- GNAT, GNATBIND -- Set True if a pragma Normalize_Scalars applies to the current unit. -- Note that Init_Or_Norm_Scalars is also set to True if this is True. Object_Directory_Present : Boolean := False; -- GNATMAKE -- Set to True when an object directory is specified with option -D Object_Path_File_Name : String_Ptr := null; -- GNAT2WHY -- Path of the temporary file that contains a list of object directories -- passed by -gnateO=<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. OpenAcc_Enabled : Boolean := False; -- GNAT -- Indicates whether OpenAcc pragmas should be taken into account. Set to -- True by the use of -fopenacc. type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); pragma Ordered (Operating_Mode_Type); Operating_Mode : Operating_Mode_Type := Generate_Code; -- GNAT -- Indicates the operating mode of the compiler. The default is generate -- code, which runs the parser, semantics and backend. Switches can be -- used to set syntax checking only mode, or syntax and semantics checking -- only mode. Operating_Mode can also be modified as a result of detecting -- errors during the compilation process. In particular if any serious -- error is detected then this flag is reset from Generate_Code to -- Check_Semantics after generating an error message. This is an ordered -- type with the semantics that each value does more than the previous one. Optimize_Alignment : Character := 'O'; -- GNAT -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can -- be modified by use of pragma Optimize_Alignment. Optimize_Alignment_Local : Boolean := False; -- GNAT -- Set True if Optimize_Alignment mode is set by a local configuration -- pragma that overrides the gnat.adc (or other configuration file) default -- so that the unit is not dependent on the default setting. Also always -- set True for internal units, since these always have a default setting -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to -- them all having such an explicit pragma in each unit). Original_Operating_Mode : Operating_Mode_Type := Generate_Code; -- GNAT -- Indicates the original operating mode of the compiler as set by compiler -- options. This is identical to Operating_Mode except that this is not -- affected by errors. Optimization_Level : Int; pragma Import (C, Optimization_Level, "optimize"); -- GNAT -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) Optimize_Size : Int; pragma Import (C, Optimize_Size, "optimize_size"); -- GNAT -- Constant reflecting setting of -Os (optimize for size). Set to nonzero -- in -Os mode and set to zero otherwise. Output_File_Name_Present : Boolean := False; -- GNATBIND, GNAT, GNATMAKE -- Set to True when the output C file name is given with option -o for -- GNATBIND, when the object file name is given with option -gnatO for GNAT -- or when the executable is given with option -o for GNATMAKE. Output_Linker_Option_List : Boolean := False; -- GNATBIND -- True if output of list of linker options is requested (-K switch set) Output_ALI_List : Boolean := False; ALI_List_Filename : String_Ptr; -- GNATBIND -- True if output of list of ALIs is requested (-A switch set). List is -- output under the given filename, or standard output if not specified. Output_Object_List : Boolean := False; Object_List_Filename : String_Ptr; -- GNATBIND -- True if output of list of objects is requested (-O switch set). List is -- output under the given filename, or standard output if not specified. Partition_Elaboration_Policy : Character := ' '; -- GNAT, GNATBIND -- Set to ' ' for the default case (no elaboration policy specified). Reset -- to first character (uppercase) of locking policy name if a valid pragma -- Partition_Elaboration_Policy is encountered. Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; -- GNAT, GNATBIND -- Remember location of previous Partition_Elaboration_Policy pragma. This -- is used for inconsistency error messages. A value of System_Location is -- used if the policy is set in package System. Persistent_BSS_Mode : Boolean := False; -- GNAT -- True if a Persistent_BSS configuration pragma is in effect, causing -- potentially persistent data to be placed in the persistent_bss section. Pessimistic_Elab_Order : Boolean := False; -- GNATBIND -- True if pessimistic elaboration order is to be chosen (-p switch set) Polling_Required : Boolean := False; -- GNAT -- Set to True if polling for asynchronous abort is enabled by using -- the -gnatP option for GNAT. Prefix_Exception_Messages : Boolean := False; -- GNAT -- Set True to prefix exception messages with entity-name: Preprocessing_Data_File : String_Ptr := null; -- GNAT -- Set by switch -gnatep=. The file name of the preprocessing data file. Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); -- An extensible array to temporarily stores symbol definitions specified -- on the command line with -gnateD switches. The value 4 is an arbitrary -- starting point, if more space is needed it is allocated as required. Preprocessing_Symbol_Last : Natural := 0; -- Index of last symbol definition in array Symbol_Definitions Print_Generated_Code : Boolean := False; -- GNAT -- Set to True to enable output of generated code in source form. This -- flag is set by the -gnatG switch. Print_Standard : Boolean := False; -- GNAT -- Set to true to enable printing of package standard in source form. -- This flag is set by the -gnatS switch type Usage is (Unknown, Not_In_Use, In_Use); Project_File_In_Use : Usage := Unknown; -- GNAT -- Indicates if a project file is used or not. Set to In_Use by the first -- SFNP pragma. Quantity_Of_Default_Size_Sec_Stacks : Int := -1; -- GNATBIND -- The number of default sized secondary stacks that the binder should -- generate. Allows ZFP users to have the binder generate extra stacks if -- needed to support multithreaded applications. A value of -1 indicates -- that no size was set by the binder. Queuing_Policy : Character := ' '; -- GNAT, GNATBIND -- Set to ' ' for the default case (no queuing policy specified). Reset to -- first character (uppercase) of locking policy name if a valid -- Queuing_Policy pragma is encountered. Queuing_Policy_Sloc : Source_Ptr := No_Location; -- GNAT, GNATBIND -- Remember location of previous Queuing_Policy pragma. This is used for -- inconsistency error messages. A value of System_Location is used if the -- policy is set in package System. Quiet_Output : Boolean := False; -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN -- Set to True if the tool should not have any output if there are no -- errors or warnings. Overriding_Renamings : Boolean := False; -- GNAT -- Set to True to enable compatibility mode with Rational compiler, and -- to accept renamings of implicit operations in their own scope. Relaxed_Elaboration_Checks : Boolean := False; -- GNAT -- Set to True to ignore certain elaboration scenarios, thus making the -- current ABE mechanism more permissive. This behavior is applicable to -- both the default and the legacy ABE models. Modified by use of -gnatJ. Relaxed_RM_Semantics : Boolean := False; -- GNAT -- Set to True to ignore some Ada semantic error to help parse legacy Ada -- code for use in e.g. static analysis (such as CodePeer). This deals -- with cases where other compilers allow illegal constructs. Tools such as -- CodePeer are interested in analyzing code rather than enforcing legality -- rules, so as long as these illegal constructs end up with code that can -- be handled by the tool in question, there is no reason to reject the -- code that is considered correct by the other compiler. Replace_In_Comments : Boolean := False; -- GNATPREP -- Set to True if -C switch used. RTS_Lib_Path_Name : String_Ptr := null; RTS_Src_Path_Name : String_Ptr := null; -- GNAT -- Set to the "adalib" and "adainclude" directories of the run time -- specified by --RTS=. RTS_Switch : Boolean := False; -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF -- Set to True when the --RTS switch is set Run_Path_Option : Boolean := True; -- GNATMAKE, GNATLINK -- Set to False when no run_path_option should be issued to the linker Search_Directory_Present : Boolean := False; -- GNAT -- Set to True when argument is -I. Reset to False when next argument, a -- search directory path is taken into account. Note that this is quite -- different from other switches in this section in that it is only set in -- a transitory manner as a result of scanning a -I switch with no file -- name, and if set, is an indication that the next argument is to be -- treated as a file name. Sec_Stack_Used : Boolean := False; -- GNAT, GBATBIND -- Set True if generated code uses the System.Secondary_Stack package. For -- the binder, set if any unit uses the secondary stack package. Setup_Projects : Boolean := False; -- GNAT DRIVER -- Set to True for GNAT SETUP: the Project Manager creates nonexistent -- object, library, and exec directories. Shared_Libgnat : Boolean; -- GNATBIND -- Set to True if a shared libgnat is requested by using the -shared option -- for GNATBIND and to False when using the -static option. The value of -- this flag is set by Gnatbind.Scan_Bind_Arg. Short_Circuit_And_Or : Boolean := False; -- GNAT -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. type SPARK_Mode_Type is (None, Off, On); -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as -- well as the value None, which indicates no such pragma/aspect applies. SPARK_Mode : SPARK_Mode_Type := None; -- GNAT -- Current SPARK mode setting. SPARK_Mode_Pragma : Node_Id := Empty; -- GNAT -- If the current SPARK_Mode (above) was set by a pragma, this records -- the pragma that set this mode. SPARK_Switches_File_Name : String_Ptr := null; -- GNAT -- Set to non-null file name by use of the -gnates switch to specify -- SPARK (gnat2why) specific switches in the given file name. Special_Exception_Package_Used : Boolean := False; -- GNAT -- Set to True if either of the unit GNAT.Most_Recent_Exception or -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of -- local raise statements into gotos in the presence of either package. Sprint_Line_Limit : Nat := 72; -- GNAT -- Limit values for chopping long lines in Cprint/Sprint output, can be -- reset by use of NNN parameter with -gnatG or -gnatD switches. Stack_Checking_Enabled : Boolean := False; -- GNAT -- Set to indicate if stack checking is enabled for the compilation. This -- is set directly from the value in the gcc back end in the body of the -- gcc version of back_end.adb. Style_Check : Boolean := False; -- GNAT -- Set True to perform style checks. Activates checks carried out in -- package Style (see body of this package for details of checks). This -- flag is set True by use of either the -gnatg or -gnaty switches, or -- by the Style_Check pragma. Style_Check_Main : Boolean := False; -- GNAT -- Set True if Style_Check was set for the main unit. This is used to -- enable style checks for units in the main extended source that get -- with'ed indirectly. It is set True by use of either the -gnatg or -- -gnaty switches, but not by use of the Style_Checks pragma. Disable_FE_Inline : Boolean := False; Disable_FE_Inline_Always : Boolean := False; -- GNAT -- Request to disable front end inlining from pragma Inline or pragma -- Inline_Always out of the presence of the -fno-inline back end flag -- on the command line, regardless of any other switches that are set. -- It remains the back end's reponsibility to honor -fno-inline at the -- back end level. Suppress_Control_Flow_Optimizations : Boolean := False; -- GNAT -- Set by -fpreserve-control-flow. Suppresses control flow optimizations -- that interfere with coverage analysis based on the object code. System_Extend_Pragma_Arg : Node_Id := Empty; -- GNAT -- Set non-empty if and only if a correct Extend_System pragma was present -- in which case it points to the argument of the pragma, and the name can -- be located as Chars (Expression (System_Extend_Pragma_Arg)). System_Extend_Unit : Node_Id := Empty; -- GNAT -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System -- is never appropriate in GNAT_Mode (and causes troubles, including -- bogus circularities, if we try to compile the run-time library with -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit -- is a copy of the value set in System_Extend_Pragma_Arg. Subunits_Missing : Boolean := False; -- GNAT -- This flag is set true if missing subunits are detected with code -- generation active. This causes code generation to be skipped. Suppress_Checks : Boolean := False; -- GNAT -- Set to True if -gnatp (suppress all checks) switch present. -- WARNING: There is a matching C declaration of this variable in fe.h Suppress_Options : Suppress_Record; -- GNAT -- Indicates outer level setting of check suppression. This initializes -- the settings of the outer scope level in any unit compiled. This is -- initialized by Osint.Initialize, and further initialized by the -- Adjust_Global_Switches flag in Gnat1drv. Table_Factor : Int := 1; -- GNAT -- Factor by which all initial table sizes set in Alloc are multiplied. -- Used in Table to calculate initial table sizes (the initial table size -- is the value in Alloc, used as the Table_Initial parameter value, -- multiplied by the factor given here. The default value is used if no -- -gnatT switch appears. Tagged_Type_Expansion : Boolean := True; -- GNAT -- Set True if tagged types and interfaces should be expanded by the -- front-end. If False, the original tree is left unexpanded for tagged -- types and dispatching calls, assuming the underlying target supports it. Target_Dependent_Info_Read_Name : String_Ptr := null; -- GNAT -- Set non-null to override the normal processing in Get_Targ and set the -- necessary information by reading the target dependent information file -- whose name is given here (see packages Get_Targ and Set_Targ for full -- details). Set to non-null file name by use of the -gnateT switch. Target_Dependent_Info_Write_Name : String_Ptr := null; -- GNAT -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info -- which writes a target independent information file (see packages -- Get_Targ and Set_Targ for full details) using the name given by -- this switch. Set to non-null file name by use of the -gnatet switch. type Origin_Of_Target is (Unknown, Default, Specified); Target_Origin : Origin_Of_Target := Unknown; -- GPRBUILD -- Indicates the origin of attribute Target in project files Target_Value : String_Access := null; -- GPRBUILD -- Indicates the value of attribute Target in project files Task_Dispatching_Policy : Character := ' '; -- GNAT, GNATBIND -- Set to ' ' for the default case (no task dispatching policy specified). -- Reset to first character (uppercase) of task dispatching policy name -- if a valid Task_Dispatching_Policy pragma is encountered. Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; -- GNAT, GNATBIND -- Remember location of previous Task_Dispatching_Policy pragma. This is -- used for inconsistency error messages. A value of System_Location is -- used if the policy is set in package System. Tasking_Used : Boolean := False; -- Set True if any tasking construct is encountered. Used to activate the -- output of the Q, L and T lines in ALI files. Time_Slice_Set : Boolean := False; -- GNATBIND -- Set True if a pragma Time_Slice is processed in the main unit, or -- if the -gnatTnn switch is present to set a time slice value. Time_Slice_Value : Nat; -- GNATBIND -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if -- Time_Slice pragma has been processed. Set to the time slice value in -- microseconds. Negative values are stored as zero, and the value is not -- larger than 1_000_000_000 (1000 seconds). Values larger than this are -- reset to this maximum. This can also be set with the -gnatTnn switch. Tolerate_Consistency_Errors : Boolean := False; -- GNATBIND -- Tolerate time stamp and other consistency errors. If this flag is set to -- True (-t), then inconsistencies result in warnings rather than errors. Treat_Categorization_Errors_As_Warnings : Boolean := False; -- Normally categorization errors are true illegalities. If this switch -- is set, then such errors result in warning messages rather than error -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated -- pragma Preelaborate differently. Treat_Restrictions_As_Warnings : Boolean := False; -- GNAT -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by -- -gnatr switch. Tree_Output : Boolean := False; -- GNAT -- Set to True (-gnatt) to generate output tree file Try_Semantics : Boolean := False; -- GNAT -- Flag set to force attempt at semantic analysis, even if parser errors -- occur. This will probably cause blowups at this stage in the game. On -- the other hand, most such blowups will be caught cleanly and simply -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. Unchecked_Shared_Lib_Imports : Boolean := False; -- GPRBUILD -- Set to True when shared library projects are allowed to import projects -- that are not shared library projects. Set on by use of the switch -- --unchecked-shared-lib-imports. Undefined_Symbols_Are_False : Boolean := False; -- GNAT, GNATPREP -- Set to True by switch -u of gnatprep or -u in the preprocessing data -- file for the compiler. Indicates that while preprocessing sources, -- symbols that are not defined have the value FALSE. Uneval_Old : Character := 'E'; -- GNAT -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' -- for the RM default behavior of giving an error. Unique_Error_Tag : Boolean := Tag_Errors; -- GNAT -- Indicates if error messages are to be prefixed by the string error: -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. Unnest_Subprogram_Mode : Boolean := False; -- If true, activates the circuitry for unnesting subprograms (see the spec -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. Unreserve_All_Interrupts : Boolean := False; -- GNAT, GNATBIND -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma -- appears anywhere in the main unit for GNAT, or if any ALI file has the -- corresponding attribute set in GNATBIND. Upper_Half_Encoding : Boolean := False; -- GNAT, GNATBIND -- Normally set False, indicating that upper half ISO 8859-1 characters are -- used in the normal way to represent themselves. If the wide character -- encoding method uses the upper bit for this encoding, then this flag is -- set True, and upper half characters in the source indicate the start of -- a wide character sequence. Set by -gnatW or -W switches. Use_Include_Path_File : Boolean := False; -- GNATMAKE, GPRBUILD -- When True, create a source search path file, even when a mapping file -- is used. Usage_Requested : Boolean := False; -- GNAT, GNATBIND, GNATMAKE -- Set to True if -h (-gnath for the compiler) switch encountered -- requesting usage information Use_Pragma_Linker_Constructor : Boolean := False; -- GNATBIND -- True if pragma Linker_Constructor applies to adainit Use_VADS_Size : Boolean := False; -- GNAT -- Set to True if a valid pragma Use_VADS_Size is processed Validity_Checks_On : Boolean := True; -- GNAT -- This flag determines if validity checking is on or off. The initial -- state is on, and the required default validity checks are active. The -- actual set of checks that is performed if Validity_Checks_On is set is -- defined by the switches in package Validsw. The Validity_Checks_On flag -- is controlled by pragma Validity_Checks (On | Off), and also some -- generated compiler code (typically code that has to do with validity -- check generation) is compiled with this flag set to False. This flag is -- set to False by the -gnatp switch. Verbose_Mode : Boolean := False; -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, -- GPRBUILD, GPRCLEAN -- Set to True to get verbose mode (full error message text and location -- information sent to standard output, also header, copyright and summary) type Verbosity_Level_Type is (None, Low, Medium, High); pragma Ordered (Verbosity_Level_Type); Verbosity_Level : Verbosity_Level_Type := High; -- GNATMAKE -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates -- the level of verbosity of informational messages: -- -- In Low Verbosity, the reasons why a source is recompiled, the name -- of the executable and the reason it must be rebuilt is output. -- -- In Medium Verbosity, additional lines are output for each ALI file -- that is checked. -- -- In High Verbosity, additional lines are output when the ALI file -- is part of an Ada library, is read-only or is part of the runtime. Warn_On_Ada_2005_Compatibility : Boolean := True; -- GNAT -- Set to True to generate all warnings on Ada 2005 compatibility issues, -- including warnings on Ada 2005 obsolescent features used in Ada 2005 -- mode. Set by default, modified by use of -gnatwy/Y. Warn_On_Ada_2012_Compatibility : Boolean := True; -- GNAT -- Set to True to generate all warnings on Ada 2012 compatibility issues, -- including warnings on Ada 2012 obsolescent features used in Ada 2012 -- mode. Modified by use of -gnatwy/Y. Warn_On_Ada_202X_Compatibility : Boolean := True; -- GNAT -- Set to True to generate all warnings on Ada 202X compatibility issues, -- including warnings on Ada 202X obsolescent features used in Ada 202X -- mode. ???There is no warning switch for this yet. Warn_On_All_Unread_Out_Parameters : Boolean := False; -- GNAT -- Set to True to generate warnings in all cases where a variable is -- modified by being passed as to an OUT formal, but the resulting value is -- never read. The default is that this warning is suppressed. Modified -- by use of gnatw.o/.O. Warn_On_Assertion_Failure : Boolean := True; -- GNAT -- Set to True to activate warnings on assertions that can be determined -- at compile time will always fail. Modified by use of -gnatw.a/.A. Warn_On_Assumed_Low_Bound : Boolean := True; -- GNAT -- Set to True to activate warnings for string parameters that are indexed -- with literals or S'Length, presumably assuming a lower bound of one. -- Modified by use of -gnatww/W. Warn_On_Atomic_Synchronization : Boolean := False; -- GNAT -- Set to True to generate information messages for atomic synchronization. -- Modified by use of -gnatw.n/.N. Warn_On_Bad_Fixed_Value : Boolean := False; -- GNAT -- Set to True to generate warnings for static fixed-point expression -- values that are not an exact multiple of the small value of the type. -- Odd by default, modified by use of -gnatwb/B. Warn_On_Biased_Representation : Boolean := True; -- GNAT -- Set to True to generate warnings for size clauses, component clauses -- and component_size clauses that force biased representation. Modified -- by use of -gnatw.b/.B. Warn_On_Constant : Boolean := False; -- GNAT -- Set to True to generate warnings for variables that could be declared -- as constants. Modified by use of -gnatwk/K. Warn_On_Deleted_Code : Boolean := False; -- GNAT -- Set to True to generate warnings for code deleted by the front end -- for conditional statements whose outcome is known at compile time. -- Modified by use of -gnatwt/T. Warn_On_Dereference : Boolean := False; -- GNAT -- Set to True to generate warnings for implicit dereferences for array -- indexing and record component access. Modified by use of -gnatwd/D. Warn_On_Export_Import : Boolean := True; -- GNAT -- Set to True to generate warnings for suspicious use of export or -- import pragmas. Modified by use of -gnatwx/X. Warn_On_Elab_Access : Boolean := False; -- GNAT -- Set to True to generate warnings for P'Access in the case where -- subprogram P is in the same package as the P'Access, and the P'Access is -- evaluated at package elaboration time, and occurs before the body of P -- has been elaborated. Warn_On_Hiding : Boolean := False; -- GNAT -- Set to True to generate warnings if a declared entity hides another -- entity. The default is that this warning is suppressed. Modified by -- use of -gnatwh/H. Warn_On_Modified_Unread : Boolean := False; -- GNAT -- Set to True to generate warnings if a variable is assigned but is never -- read. Also controls warnings for similar cases involving out parameters, -- but only if there is only one out parameter for the procedure involved. -- The default is that this warning is suppressed, modified by use of -- -gnatwm/M. Warn_On_No_Value_Assigned : Boolean := True; -- GNAT -- Set to True to generate warnings if no value is ever assigned to a -- variable that is at least partially uninitialized. Set to false to -- suppress such warnings. The default is that such warnings are enabled. -- Modified by use of -gnatwv/V. Warn_On_Non_Local_Exception : Boolean := False; -- GNAT -- Set to True to generate warnings for non-local exception raises and also -- handlers that can never handle a local raise. This warning is only ever -- generated if pragma Restrictions (No_Exception_Propagation) is set. The -- default is not to generate the warnings except that if the source has -- at least one exception handler, and this restriction is set, and the -- warning was not explicitly turned off, then it is turned on by default. -- Modified by use of -gnatw.x/.X. No_Warn_On_Non_Local_Exception : Boolean := False; -- GNAT -- This is set to True if the above warning is explicitly suppressed. We -- use this to avoid turning it on by default when No_Exception_Propagation -- restriction is set and an exception handler is present. Warn_On_Object_Renames_Function : Boolean := False; -- GNAT -- Set to True to generate warnings when a function result is renamed as -- an object. The default is that this warning is disabled. Modified by -- use of -gnatw.r/.R. Warn_On_Obsolescent_Feature : Boolean := False; -- GNAT -- Set to True to generate warnings on use of any feature in Annex or if a -- subprogram is called for which a pragma Obsolescent applies. Modified -- by use of -gnatwj/J. Warn_On_Overlap : Boolean := False; -- GNAT -- Set to True to generate warnings when a writable actual overlaps with -- another actual in a subprogram call. This applies only in modes before -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. -- Modified by use of -gnatw.i/.I. Warn_On_Questionable_Missing_Parens : Boolean := True; -- GNAT -- Set to True to generate warnings for cases where parentheses are missing -- and the usage is questionable, because the intent is unclear. On by -- default, modified by use of -gnatwq/Q. Warn_On_Parameter_Order : Boolean := False; -- GNAT -- Set to True to generate warnings for cases where the argument list for -- a call is a sequence of identifiers that match the formal identifiers, -- but are in the wrong order. Warn_On_Redundant_Constructs : Boolean := False; -- GNAT -- Set to True to generate warnings for redundant constructs (e.g. useless -- assignments/conversions). The default is that this warning is disabled. -- Modified by use of -gnatwr/R. Warn_On_Reverse_Bit_Order : Boolean := True; -- GNAT -- Set to True to generate warning (informational) messages for component -- clauses that are affected by non-standard bit-order. The default is -- that this warning is enabled. Modified by -gnatw.v/.V. Warn_On_Suspicious_Contract : Boolean := True; -- GNAT -- Set to True to generate warnings for suspicious contracts expressed as -- pragmas or aspects precondition and postcondition, as well as other -- suspicious cases of expressions typically found in contracts like -- quantified expressions and uses of Update attribute. The default is that -- this warning is enabled. Modified by use of -gnatw.t/.T. Warn_On_Suspicious_Modulus_Value : Boolean := True; -- GNAT -- Set to True to generate warnings for suspicious modulus values. The -- default is that this warning is enabled. Modified by -gnatw.m/.M. Warn_On_Unchecked_Conversion : Boolean := True; -- GNAT -- Set to True to generate warnings for unchecked conversions that may have -- non-portable semantics (e.g. because sizes of types differ). Modified -- by use of -gnatwz/Z. Warn_On_Unordered_Enumeration_Type : Boolean := False; -- GNAT -- Set to True to generate warnings for inappropriate uses (comparisons -- and explicit ranges) on unordered enumeration types (which includes -- all enumeration types for which pragma Ordered is not given). The -- default is that this warning is disabled. Modified by -gnat.u/.U. Warn_On_Unrecognized_Pragma : Boolean := True; -- GNAT -- Set to True to generate warnings for unrecognized pragmas. The default -- is that this warning is enabled. Modified by use of -gnatwg/G. Warn_On_Unrepped_Components : Boolean := False; -- GNAT -- Set to True to generate warnings for the case of components of record -- which have a record representation clause but this component does not -- have a component clause. Modified by use of -gnatw.c/.C. Warn_On_Warnings_Off : Boolean := False; -- GNAT -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), -- where either the pragma is never used, or it could be replaced by a -- pragma Unmodified or Unreferenced. Also generates warnings for pragma -- Warning (Off, string) which either has no matching pragma Warning On, -- or where no warning has been suppressed by the use of the pragma. -- Modified by use of -gnatw.w/.W. type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors); Warning_Mode : Warning_Mode_Type := Normal; -- GNAT, GNATBIND -- Controls treatment of warning messages. If set to Suppress, warning -- messages are not generated at all. In Normal mode, they are generated -- but do not count as errors. In Treat_As_Error mode, warning messages are -- generated and treated as errors. In Treat_Run_Time_Warnings_As_Errors, -- warning messages regarding errors raised at run time are treated as -- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be -- ignored (except for legality checks), unless we are in GNATprove_Mode, -- which requires pragma Warnings to be stored for the formal verification -- backend. Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; -- GNAT, GNATBIND -- Method used for encoding wide characters in the source program. See -- description of type in unit System.WCh_Con for a list of the methods -- that are currently supported. Note that brackets notation is always -- recognized in source programs regardless of the setting of this -- variable. The default setting causes only the brackets notation to be -- recognized. If this is the main unit, this setting also controls the -- output of the W=? parameter in the ALI file, which is used to provide -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, -- the value set here overrides this main unit default. Wide_Character_Encoding_Method_Specified : Boolean := False; -- GNAT, GNATBIND -- Set True if the value in Wide_Character_Encoding_Method was set as -- a result of an explicit -gnatW? or -W? switch. False otherwise. Xref_Active : Boolean := True; -- GNAT -- Set if cross-referencing is enabled (i.e. xref info in ALI files) Zero_Formatting : Boolean := False; -- GNATBIND -- Do no formatting (no title, no leading spaces, no empty lines) in -- auxiliary outputs (-e, -K, -l, -R). ---------------------------- -- Configuration Settings -- ---------------------------- -- These are settings that are used to establish the mode at the start of -- each unit. The values defined below can be affected either by command -- line switches, or by the use of appropriate configuration pragmas in a -- configuration pragma file (but NOT by a local use of a configuration -- pragma in a single file). Ada_Version_Config : Ada_Version_Type; -- GNAT -- This is the value of the configuration switch for the Ada 83 mode, as -- set by the command line switches -gnat83/95/2005/2012, and possibly -- modified by the use of configuration pragmas Ada_*. This switch is used -- to set the initial value for Ada_Version mode at the start of analysis -- of a unit. Note however that the setting of this flag is ignored for -- internal and predefined units (which are always compiled in the most up -- to date version of Ada). Ada_Version_Pragma_Config : Node_Id; -- This will be set nonempty if it is set by a configuration pragma Ada_Version_Explicit_Config : Ada_Version_Type; -- GNAT -- This is set in the same manner as Ada_Version_Config. The difference is -- that the setting of this flag is not ignored for internal and predefined -- units, which for some purposes do indeed access this value, regardless -- of the fact that they are compiled the most up to date ada version). Assertions_Enabled_Config : Boolean; -- GNAT -- This is the value of the configuration switch for assertions enabled -- mode, as possibly set by the command line switch -gnata, and possibly -- modified by the use of the configuration pragma Assertion_Policy. Assume_No_Invalid_Values_Config : Boolean; -- GNAT -- This is the value of the configuration switch for assuming "no invalid -- values enabled" mode, as possibly set by the command line switch -- -gnatB, and possibly modified by the use of the configuration pragma -- Assume_No_Invalid_Values. Check_Float_Overflow_Config : Boolean; -- GNAT -- Set to True to check that operations on predefined unconstrained float -- types (e.g. Float, Long_Float) do not overflow and generate infinities -- or invalid values. Set by the Check_Float_Overflow pragma, or by use -- of the -gnateF switch. Check_Policy_List_Config : Node_Id; -- GNAT -- This points to the list of N_Pragma nodes for Check_Policy pragmas -- that are linked through the Next_Pragma fields, with the list being -- terminated by Empty. The order is most recently processed first. This -- list includes only those pragmas in configuration pragma files. Default_Pool_Config : Node_Id := Empty; -- GNAT -- Same as Default_Pool above, except this is only for Default_Storage_Pool -- pragmas that are configuration pragmas. Default_SSO_Config : Character := ' '; -- GNAT -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration -- pragma. A value of ' ' means that no pragma was given, otherwise the -- value is 'H' for High_Order_First or 'L' for Low_Order_First. Dynamic_Elaboration_Checks_Config : Boolean := False; -- GNAT -- Set True for dynamic elaboration checking mode, as set by the -gnatE -- switch or by the use of pragma Elaboration_Checking (Dynamic). Exception_Locations_Suppressed_Config : Boolean := False; -- GNAT -- Set True by use of the configuration pragma Suppress_Exception_Messages Extensions_Allowed_Config : Boolean; -- GNAT -- This is the flag that indicates whether extensions are allowed. It can -- be set True either by use of the -gnatX switch, or by use of the -- configuration pragma Extensions_Allowed (On). It is always set to True -- for internal GNAT units, since extensions are always permitted in such -- units. External_Name_Exp_Casing_Config : External_Casing_Type; -- GNAT -- This is the value of the configuration switch that controls casing of -- external symbols for which an explicit external name is given. It can be -- set to Uppercase by the command line switch -gnatF, and further modified -- by the use of the configuration pragma External_Name_Casing in the -- gnat.adc file. This flag is used to set the initial value for -- External_Name_Exp_Casing at the start of analyzing each unit. Note -- however that the setting of this flag is ignored for internal and -- predefined units (which are always compiled with As_Is mode). External_Name_Imp_Casing_Config : External_Casing_Type; -- GNAT -- This is the value of the configuration switch that controls casing of -- external symbols where the external name is implicitly given. It can be -- set to Uppercase by the command line switch -gnatF, and further modified -- by the use of the configuration pragma External_Name_Casing in the -- gnat.adc file. This flag is used to set the initial value for -- External_Name_Imp_Casing at the start of analyzing each unit. Note -- however that the setting of this flag is ignored for internal and -- predefined units (which are always compiled with Lowercase mode). Fast_Math_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls Fast_Math -- mode, as set by a Fast_Math pragma in configuration pragmas. It is -- used to set the initial value of Fast_Math at the start of each new -- compilation unit. Initialize_Scalars_Config : Boolean; -- GNAT -- This is the value of the configuration switch that is set by the -- pragma Initialize_Scalars when it appears in the gnat.adc file. -- This switch is not set when the pragma appears ahead of a given -- unit, so it does not affect the compilation of other units. No_Component_Reordering_Config : Boolean; -- GNAT -- This is the value of the configuration switch that is set by the -- pragma No_Component_Reordering when it appears in the gnat.adc file. -- This flag is used to set the initial value of No_Component_Reordering -- at the start of each compilation unit, except that it is always set -- False for predefined units. No_Exit_Message : Boolean := False; -- GNATMAKE, GPRBUILD -- Set with switch --no-exit-message. When True, if there are compilation -- failures, the builder does not issue an exit error message. Optimize_Alignment_Config : Character; -- GNAT -- This is the value of the configuration switch that controls the -- alignment optimization mode, as set by an Optimize_Alignment pragma. -- It is used to set the initial value of Optimize_Alignment at the start -- of each new compilation unit, except that it is always set to 'O' (off) -- for internal units. Persistent_BSS_Mode_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls whether -- potentially persistent data is to be placed in the persistent_bss -- section. It can be set True by use of the pragma Persistent_BSS. -- This flag is used to set the initial value of Persistent_BSS_Mode -- at the start of each compilation unit, except that it is always -- set False for predefined units. Polling_Required_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls polling -- mode. It can be set True by the command line switch -gnatP, and then -- further modified by the use of pragma Polling in the gnat.adc file. This -- flag is used to set the initial value for Polling_Required at the start -- of analyzing each unit. Prefix_Exception_Messages_Config : Boolean; -- The setting of Prefix_Exception_Messages from configuration pragmas SPARK_Mode_Config : SPARK_Mode_Type := None; -- GNAT -- The setting of SPARK_Mode from configuration pragmas SPARK_Mode_Pragma_Config : Node_Id := Empty; -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. Uneval_Old_Config : Character; -- GNAT -- The setting of Uneval_Old from configuration pragmas Use_VADS_Size_Config : Boolean; -- GNAT -- This is the value of the configuration switch that controls the use of -- VADS_Size instead of Size wherever the attribute Size is used. It can -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. -- This flag is used to set the initial value for Use_VADS_Size at the -- start of analyzing each unit. Note however that the setting of this flag -- is ignored for internal and predefined units (which are always compiled -- with the standard Size semantics). type Config_Switches_Type is private; -- Type used to save values of the switches set from Config values procedure Register_Config_Switches; -- This procedure is called after processing the gnat.adc file and other -- configuration pragma files to record the values of the Config switches, -- as possibly modified by the use of command line switches and pragmas -- appearing in these files. procedure Restore_Config_Switches (Save : Config_Switches_Type); -- This procedure restores a set of switch values previously saved by a -- call to Save_Config_Switches. function Save_Config_Switches return Config_Switches_Type; -- Return the current state of all configuration-related attributes procedure Set_Config_Switches (Internal_Unit : Boolean; Main_Unit : Boolean); -- This procedure sets the switches to the appropriate initial values. The -- parameter Internal_Unit is True for an internal or predefined unit, and -- affects the way the switches are set (see above). Main_Unit is true if -- switches are being set for the main unit or for the spec of the main -- unit. This affects setting of the assert/debug pragma switches, which -- are normally set false by default for an internal unit, except when the -- internal unit is the main unit, in which case we use the command line -- settings. ------------------------ -- Other Global Flags -- ------------------------ Building_Static_Dispatch_Tables : Boolean := True; -- This flag indicates if the backend supports generation of statically -- allocated dispatch tables. If it is True, then the front end will -- generate static aggregates for dispatch tables that contain forward -- references to addresses of subprograms not seen yet, and the back end -- must be prepared to handle this case. If it is False, then the front -- end generates assignments to initialize the dispatch table, and there -- are no such forward references. By default we build statically allocated -- dispatch tables for all library level tagged types in all platforms.This -- behavior can be disabled using switch -gnatd.t which will set this flag -- to False and revert to the previous dynamic behavior. Expander_Active : Boolean := False; -- A flag that indicates if expansion is active (True) or deactivated -- (False). When expansion is deactivated all calls to expander routines -- have no effect. Note that the initial setting of False is merely to -- prevent saving of an undefined value for an initial call to the -- Expander_Mode_Save_And_Set procedure. For more information on the use of -- this flag, see package Expander. Indeed this flag might more logically -- be in the spec of Expander, but it is referenced by Errout, and it -- really seems wrong for Errout to depend on Expander. ----------------------- -- 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 -- ----------------------------------- GNATprove_Mode : Boolean := False; -- Specific compiling mode targeting formal verification for those parts -- of the input code that belong to the SPARK 2014 subset of Ada. Set True -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note -- that this is completely separate from the SPARK restriction defined in -- GNAT to detect violations of a subset of SPARK 2005 rules. --------------------------- -- Error/Warning Control -- --------------------------- -- The following array would more reasonably be located in Err_Vars or -- Errout, but we put them here to deal with licensing issues (we need -- this to have the GPL exception licensing, since these variables and -- subprograms are accessed from units with this licensing). Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; -- Table for recording Warning_As_Error pragmas as they are processed. It -- would be nicer to use Table, but there are circular elaboration problems -- if we try to do this, and an attempt to find some other appropriately -- licensed unit to declare this as a Table failed with various elaboration -- circularities. Warnings_As_Errors_Count : Natural; -- GNAT -- Number of entries stored in Warnings_As_Errors table Warnings_As_Errors_Count_Config : Natural; -- GNAT -- Count of pattern strings stored from Warning_As_Error pragmas --------------- -- GNAT_Mode -- --------------- GNAT_Mode : Boolean := False; -- GNAT -- True if compiling in GNAT system mode (-gnatg switch) -- WARNING: There is a matching C declaration of this variable in fe.h GNAT_Mode_Config : Boolean := False; -- GNAT -- True if -gnatg switch is present. GNAT_Mode may be temporary set to -- True during the analysis of a system unit, but GNAT_Mode_Config must -- not change once scanned and set. -- Setting GNAT mode has the following effects on the language that is -- accepted. Note that several of the following have the effect of changing -- an error to a warning. But warnings are usually treated as fatal errors -- in -gnatg mode, so to actually take advantage of such a change, it is -- necessary to add an explicit pragma Warnings (Off) in the source and -- this requires clear documentation of why this is necessary. -- The identifier character set is set to 'n' (7-bit ASCII) -- Pragma Extend_System is ignored -- Warning_Mode is set to Treat_As_Error (-gnatwe) -- Standard style checks are set (See Set_GNAT_Style_Check_Options) -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) -- The Ada version is set to Ada 2012 -- Task priorities are always allowed to be in the range Any_Priority -- Overflow checks are suppressed, overflow checking set to strict mode -- ALI files are always generated for predefined generic packages -- Obsolescent feature warnings are suppressed -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed -- The Scalar_Storage_Order attribute applies to generic types -- Categorization errors are treated as warnings rather than errors -- Statements in preelaborated units give warnings rather than errors -- Private objects are allowed in preelaborated units -- Non-static constants in preelaborated units give warnings not errors -- The warning about component size being ignored is suppressed -- The warning about size clauses being ignored is suppressed -- Initializing limited types gives a warning rather than an error -- Copying of limited objects is allowed -- Returning objects of limited types is allowed -- Non-static call in preelaborated unit give a warning, not an error -- Warnings on possible elaboration errors are suppressed -- Warnings about packing being ignored are suppressed -- Warnings in internal units are not suppressed (they normally are) -- The only special comment sequence allowed is --! -------------------------- -- Private Declarations -- -------------------------- private -- The following type is used to save and restore settings of switches in -- Opt that represent the configuration (i.e. result of config pragmas). -- Note that Ada_Version_Explicit is not included, since this is a sticky -- flag that once set does not get reset, since the whole idea of this flag -- is to record the setting for the main unit. type Config_Switches_Type is record Ada_Version : Ada_Version_Type; Ada_Version_Explicit : Ada_Version_Type; Ada_Version_Pragma : Node_Id; Assertions_Enabled : Boolean; Assume_No_Invalid_Values : Boolean; Check_Float_Overflow : Boolean; Check_Policy_List : Node_Id; Default_Pool : Node_Id; Default_SSO : Character; Dynamic_Elaboration_Checks : Boolean; Exception_Locations_Suppressed : Boolean; Extensions_Allowed : Boolean; External_Name_Exp_Casing : External_Casing_Type; External_Name_Imp_Casing : External_Casing_Type; Fast_Math : Boolean; Initialize_Scalars : Boolean; No_Component_Reordering : Boolean; Normalize_Scalars : Boolean; Optimize_Alignment : Character; Optimize_Alignment_Local : Boolean; Persistent_BSS_Mode : Boolean; Polling_Required : Boolean; Prefix_Exception_Messages : Boolean; SPARK_Mode : SPARK_Mode_Type; SPARK_Mode_Pragma : Node_Id; Uneval_Old : Character; Use_VADS_Size : Boolean; Warnings_As_Errors_Count : Natural; end record; -- The following declarations are for GCC version dependent flags. We do -- not let client code in the compiler test GCC_Version directly, but -- instead use deferred constants for relevant feature tags. -- Note: there currently are no such constants defined in this section, -- since the compiler front end is currently entirely independent of the -- GCC version, which is a desirable state of affairs. function get_gcc_version return Int; pragma Import (C, get_gcc_version, "get_gcc_version"); GCC_Version : constant Nat := get_gcc_version; -- GNATMAKE -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. end Opt;