------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S W I T C H - C -- -- -- -- B o d y -- -- -- -- Copyright (C) 2001-2013, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package is for switch processing and should not depend on higher level -- packages such as those for the scanner, parser, etc. Doing so may cause -- circularities, especially for back ends using Adabkend. with Debug; use Debug; with Lib; use Lib; with Osint; use Osint; with Opt; use Opt; with Stylesw; use Stylesw; with Ttypes; use Ttypes; with Validsw; use Validsw; with Warnsw; use Warnsw; with Ada.Unchecked_Deallocation; with System.WCh_Con; use System.WCh_Con; package body Switch.C is RTS_Specified : String_Access := null; -- Used to detect multiple use of --RTS= flag procedure Add_Symbol_Definition (Def : String); -- Add a symbol definition from the command line procedure Free is new Ada.Unchecked_Deallocation (String_List, String_List_Access); -- Avoid using System.Strings.Free, which also frees the designated strings function Get_Overflow_Mode (C : Character) return Overflow_Mode_Type; -- Given a digit in the range 0 .. 3, returns the corresponding value of -- Overflow_Mode_Type. Raises Program_Error if C is outside this range. function Switch_Subsequently_Cancelled (C : String; Args : String_List; Arg_Rank : Positive) return Boolean; -- This function is called from Scan_Front_End_Switches. It determines if -- the switch currently being scanned is followed by a switch of the form -- "-gnat-" & C, where C is the argument. If so, then True is returned, -- and Scan_Front_End_Switches will cancel the effect of the switch. If -- no such switch is found, False is returned. --------------------------- -- Add_Symbol_Definition -- --------------------------- procedure Add_Symbol_Definition (Def : String) is begin -- If Preprocessor_Symbol_Defs is not large enough, double its size if Preprocessing_Symbol_Last = Preprocessing_Symbol_Defs'Last then declare New_Symbol_Definitions : constant String_List_Access := new String_List (1 .. 2 * Preprocessing_Symbol_Last); begin New_Symbol_Definitions (Preprocessing_Symbol_Defs'Range) := Preprocessing_Symbol_Defs.all; Free (Preprocessing_Symbol_Defs); Preprocessing_Symbol_Defs := New_Symbol_Definitions; end; end if; Preprocessing_Symbol_Last := Preprocessing_Symbol_Last + 1; Preprocessing_Symbol_Defs (Preprocessing_Symbol_Last) := new String'(Def); end Add_Symbol_Definition; ----------------------- -- Get_Overflow_Mode -- ----------------------- function Get_Overflow_Mode (C : Character) return Overflow_Mode_Type is begin case C is when '1' => return Strict; when '2' => return Minimized; -- Eliminated allowed only if Long_Long_Integer is 64 bits (since -- the current implementation of System.Bignums assumes this). when '3' => if Standard_Long_Long_Integer_Size /= 64 then Bad_Switch ("-gnato3 not implemented for this configuration"); else return Eliminated; end if; when others => raise Program_Error; end case; end Get_Overflow_Mode; ----------------------------- -- Scan_Front_End_Switches -- ----------------------------- procedure Scan_Front_End_Switches (Switch_Chars : String; Args : String_List; Arg_Rank : Positive) is First_Switch : Boolean := True; -- False for all but first switch Max : constant Natural := Switch_Chars'Last; Ptr : Natural; C : Character := ' '; Dot : Boolean; Store_Switch : Boolean; -- For -gnatxx switches, the normal processing, signalled by this flag -- being set to True, is to store the switch on exit from the case -- statement, the switch stored is -gnat followed by the characters -- from First_Char to Ptr-1. For cases like -gnaty, where the switch -- is stored in separate pieces, this flag is set to False, and the -- appropriate calls to Store_Compilation_Switch are made from within -- the case branch. First_Char : Positive; -- Marks start of switch to be stored First_Ptr : Positive; -- Save position of first character after -gnatd (for checking that -- debug flags that must come first are first, in particular -gnatd.b), begin Ptr := Switch_Chars'First; -- Skip past the initial character (must be the switch character) if Ptr = Max then Bad_Switch (C); else Ptr := Ptr + 1; end if; -- Handle switches that do not start with -gnat if Ptr + 3 > Max or else Switch_Chars (Ptr .. Ptr + 3) /= "gnat" then -- There are two front-end switches that do not start with -gnat: -- -I, --RTS if Switch_Chars (Ptr) = 'I' then -- Set flag Search_Directory_Present if switch is "-I" only: -- the directory will be the next argument. if Ptr = Max then Search_Directory_Present := True; return; end if; Ptr := Ptr + 1; -- Find out whether this is a -I- or regular -Ixxx switch -- Note: -I switches are not recorded in the ALI file, since the -- meaning of the program depends on the source files compiled, -- not where they came from. if Ptr = Max and then Switch_Chars (Ptr) = '-' then Look_In_Primary_Dir := False; else Add_Src_Search_Dir (Switch_Chars (Ptr .. Max)); end if; -- Processing of the --RTS switch. --RTS may have been modified by -- gcc into -fRTS (for GCC targets). elsif Ptr + 3 <= Max and then (Switch_Chars (Ptr .. Ptr + 3) = "fRTS" or else Switch_Chars (Ptr .. Ptr + 3) = "-RTS") then Ptr := Ptr + 1; if Ptr + 4 > Max or else Switch_Chars (Ptr + 3) /= '=' then Osint.Fail ("missing path for --RTS"); else -- Check that this is the first time --RTS is specified or if -- it is not the first time, the same path has been specified. if RTS_Specified = null then RTS_Specified := new String'(Switch_Chars (Ptr + 4 .. Max)); elsif RTS_Specified.all /= Switch_Chars (Ptr + 4 .. Max) then Osint.Fail ("--RTS cannot be specified multiple times"); end if; -- Valid --RTS switch Opt.No_Stdinc := True; Opt.RTS_Switch := True; RTS_Src_Path_Name := Get_RTS_Search_Dir (Switch_Chars (Ptr + 4 .. Max), Include); RTS_Lib_Path_Name := Get_RTS_Search_Dir (Switch_Chars (Ptr + 4 .. Max), Objects); if RTS_Src_Path_Name /= null and then RTS_Lib_Path_Name /= null then -- Store the -fRTS switch (Note: Store_Compilation_Switch -- changes -fRTS back into --RTS for the actual output). Store_Compilation_Switch (Switch_Chars); elsif RTS_Src_Path_Name = null and then RTS_Lib_Path_Name = null then Osint.Fail ("RTS path not valid: missing " & "adainclude and adalib directories"); elsif RTS_Src_Path_Name = null then Osint.Fail ("RTS path not valid: missing " & "adainclude directory"); elsif RTS_Lib_Path_Name = null then Osint.Fail ("RTS path not valid: missing " & "adalib directory"); end if; end if; -- There are no other switches not starting with -gnat else Bad_Switch (Switch_Chars); end if; -- Case of switch starting with -gnat else Ptr := Ptr + 4; -- Loop to scan through switches given in switch string while Ptr <= Max loop First_Char := Ptr; Store_Switch := True; C := Switch_Chars (Ptr); case C is -- -gnata (assertions enabled) when 'a' => Ptr := Ptr + 1; Assertions_Enabled := True; -- -gnatA (disregard gnat.adc) when 'A' => Ptr := Ptr + 1; Config_File := False; -- -gnatb (brief messages to stderr) when 'b' => Ptr := Ptr + 1; Brief_Output := True; -- -gnatB (assume no invalid values) when 'B' => Ptr := Ptr + 1; Assume_No_Invalid_Values := True; -- -gnatc (check syntax and semantics only) when 'c' => if not First_Switch then Osint.Fail ("-gnatc must be first if combined with other switches"); end if; -- Not allowed if previous -gnatR given if List_Representation_Info /= 0 or else List_Representation_Info_Mechanisms then Osint.Fail ("-gnatc not allowed since -gnatR given previously"); end if; Ptr := Ptr + 1; Operating_Mode := Check_Semantics; -- -gnatC (Generate CodePeer information) when 'C' => Ptr := Ptr + 1; if not CodePeer_Mode then CodePeer_Mode := True; -- Suppress compiler warnings by default, since what we are -- interested in here is what CodePeer can find out. Note -- that if -gnatwxxx is specified after -gnatC on the -- command line, we do not want to override this setting in -- Adjust_Global_Switches, and assume that the user wants to -- get both warnings from GNAT and CodePeer messages. Warning_Mode := Suppress; end if; -- -gnatd (compiler debug options) when 'd' => Store_Switch := False; Dot := False; First_Ptr := Ptr + 1; -- Note: for the debug switch, the remaining characters in this -- switch field must all be debug flags, since all valid switch -- characters are also valid debug characters. -- Loop to scan out debug flags while Ptr < Max loop Ptr := Ptr + 1; C := Switch_Chars (Ptr); exit when C = ASCII.NUL or else C = '/' or else C = '-'; if C in '1' .. '9' or else C in 'a' .. 'z' or else C in 'A' .. 'Z' then -- Case of dotted flag if Dot then Set_Dotted_Debug_Flag (C); Store_Compilation_Switch ("-gnatd." & C); -- Special check, -gnatd.b must come first if C = 'b' and then (Ptr /= First_Ptr + 1 or else not First_Switch) then Osint.Fail ("-gnatd.b must be first if combined " & "with other switches"); end if; -- Not a dotted flag else Set_Debug_Flag (C); Store_Compilation_Switch ("-gnatd" & C); end if; elsif C = '.' then Dot := True; elsif Dot then Bad_Switch ("-gnatd." & Switch_Chars (Ptr .. Max)); else Bad_Switch ("-gnatd" & Switch_Chars (Ptr .. Max)); end if; end loop; return; -- -gnatD (debug expanded code) when 'D' => Ptr := Ptr + 1; -- Not allowed if previous -gnatR given -- The reason for this prohibition is that the rewriting of -- Sloc values causes strange malfunctions in the tests of -- whether units belong to the main source. This is really a -- bug, but too hard to fix for a marginal capability ??? -- The proper fix is to completely redo -gnatD processing so -- that the tree is not messed with, and instead a separate -- table is built on the side for debug information generation. if List_Representation_Info /= 0 then Osint.Fail ("-gnatD not permitted since -gnatR given previously"); end if; -- Scan optional integer line limit value if Nat_Present (Switch_Chars, Max, Ptr) then Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'D'); Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40); end if; -- Note: -gnatD also sets -gnatx (to turn off cross-reference -- generation in the ali file) since otherwise this generation -- gets confused by the "wrong" Sloc values put in the tree. Debug_Generated_Code := True; Xref_Active := False; Set_Debug_Flag ('g'); -- -gnate? (extended switches) when 'e' => Ptr := Ptr + 1; -- The -gnate? switches are all double character switches -- so we must always have a character after the e. if Ptr > Max then Bad_Switch ("-gnate"); end if; case Switch_Chars (Ptr) is -- -gnatea (initial delimiter of explicit switches) -- This is an internal switch -- All switches that come before -gnatea have been added by -- the GCC driver and are not stored in the ALI file. -- See also -gnatez below. when 'a' => Store_Switch := False; Enable_Switch_Storing; Ptr := Ptr + 1; -- -gnateA (aliasing checks on parameters) when 'A' => Ptr := Ptr + 1; Check_Aliasing_Of_Parameters := True; -- -gnatec (configuration pragmas) when 'c' => Store_Switch := False; Ptr := Ptr + 1; -- There may be an equal sign between -gnatec and -- the path name of the config file. if Ptr <= Max and then Switch_Chars (Ptr) = '=' then Ptr := Ptr + 1; end if; if Ptr > Max then Bad_Switch ("-gnatec"); end if; declare Config_File_Name : constant String_Access := new String' (Switch_Chars (Ptr .. Max)); begin if Config_File_Names = null then Config_File_Names := new String_List'(1 => Config_File_Name); else declare New_Names : constant String_List_Access := new String_List (1 .. Config_File_Names'Length + 1); begin for Index in Config_File_Names'Range loop New_Names (Index) := Config_File_Names (Index); Config_File_Names (Index) := null; end loop; New_Names (New_Names'Last) := Config_File_Name; Free (Config_File_Names); Config_File_Names := New_Names; end; end if; end; return; -- -gnateC switch (generate CodePeer messages) when 'C' => Ptr := Ptr + 1; Generate_CodePeer_Messages := True; -- -gnated switch (disable atomic synchronization) when 'd' => Suppress_Options.Suppress (Atomic_Synchronization) := True; -- -gnateD switch (preprocessing symbol definition) when 'D' => Store_Switch := False; Ptr := Ptr + 1; if Ptr > Max then Bad_Switch ("-gnateD"); end if; Add_Symbol_Definition (Switch_Chars (Ptr .. Max)); -- Store the switch Store_Compilation_Switch ("-gnateD" & Switch_Chars (Ptr .. Max)); Ptr := Max + 1; -- -gnateE (extra exception information) when 'E' => Exception_Extra_Info := True; Ptr := Ptr + 1; -- -gnatef (full source path for brief error messages) when 'f' => Store_Switch := False; Ptr := Ptr + 1; Full_Path_Name_For_Brief_Errors := True; -- -gnateF (Check_Float_Overflow) when 'F' => Ptr := Ptr + 1; Check_Float_Overflow := True; -- -gnateG (save preprocessor output) when 'G' => Generate_Processed_File := True; Ptr := Ptr + 1; -- -gnatei (max number of instantiations) when 'i' => Ptr := Ptr + 1; Scan_Pos (Switch_Chars, Max, Ptr, Maximum_Instantiations, C); -- -gnateI (index of unit in multi-unit source) when 'I' => Ptr := Ptr + 1; Scan_Pos (Switch_Chars, Max, Ptr, Multiple_Unit_Index, C); -- -gnatel when 'l' => Ptr := Ptr + 1; Elab_Info_Messages := True; -- -gnateL when 'L' => Ptr := Ptr + 1; Elab_Info_Messages := False; -- -gnatem (mapping file) when 'm' => Store_Switch := False; Ptr := Ptr + 1; -- There may be an equal sign between -gnatem and -- the path name of the mapping file. if Ptr <= Max and then Switch_Chars (Ptr) = '=' then Ptr := Ptr + 1; end if; if Ptr > Max then Bad_Switch ("-gnatem"); end if; Mapping_File_Name := new String'(Switch_Chars (Ptr .. Max)); return; -- -gnateO= (object path file) -- This is an internal switch when 'O' => Store_Switch := False; Ptr := Ptr + 1; -- Check for '=' if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then Bad_Switch ("-gnateO"); else Object_Path_File_Name := new String'(Switch_Chars (Ptr + 1 .. Max)); end if; return; -- -gnatep (preprocessing data file) when 'p' => Store_Switch := False; Ptr := Ptr + 1; -- There may be an equal sign between -gnatep and -- the path name of the mapping file. if Ptr <= Max and then Switch_Chars (Ptr) = '=' then Ptr := Ptr + 1; end if; if Ptr > Max then Bad_Switch ("-gnatep"); end if; Preprocessing_Data_File := new String'(Switch_Chars (Ptr .. Max)); -- Store the switch, normalizing to -gnatep= Store_Compilation_Switch ("-gnatep=" & Preprocessing_Data_File.all); Ptr := Max + 1; -- -gnateP (Treat pragma Pure/Preelaborate errs as warnings) when 'P' => Treat_Categorization_Errors_As_Warnings := True; -- -gnates=file (specify extra file switches for gnat2why) -- This is an internal switch when 's' => if not First_Switch then Osint.Fail ("-gnates must not be combined with other switches"); end if; -- Check for '=' Ptr := Ptr + 1; if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then Bad_Switch ("-gnates"); else SPARK_Switches_File_Name := new String'(Switch_Chars (Ptr + 1 .. Max)); end if; return; -- -gnateS (generate SCO information) -- Include Source Coverage Obligation information in ALI -- files for use by source coverage analysis tools -- (gnatcov) (equivalent to -fdump-scos, provided for -- backwards compatibility). when 'S' => Generate_SCO := True; Generate_SCO_Instance_Table := True; Ptr := Ptr + 1; -- -gnatet (write target dependent information) when 't' => if not First_Switch then Osint.Fail ("-gnatet must not be combined with other switches"); end if; -- Check for '=' Ptr := Ptr + 1; if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then Bad_Switch ("-gnatet"); else Target_Dependent_Info_Write_Name := new String'(Switch_Chars (Ptr + 1 .. Max)); end if; return; -- -gnateT (read target dependent information) when 'T' => if not First_Switch then Osint.Fail ("-gnateT must not be combined with other switches"); end if; -- Check for '=' Ptr := Ptr + 1; if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then Bad_Switch ("-gnateT"); else -- This parameter was stored by Set_Targ earlier pragma Assert (Target_Dependent_Info_Read_Name.all = Switch_Chars (Ptr + 1 .. Max)); null; end if; return; -- -gnateu (unrecognized y,V,w switches) when 'u' => Ptr := Ptr + 1; Ignore_Unrecognized_VWY_Switches := True; -- -gnateV (validity checks on parameters) when 'V' => Ptr := Ptr + 1; Check_Validity_Of_Parameters := True; -- -gnateY (ignore Style_Checks pragmas) when 'Y' => Ignore_Style_Checks_Pragmas := True; Ptr := Ptr + 1; -- -gnatez (final delimiter of explicit switches) -- This is an internal switch -- All switches that come after -gnatez have been added by -- the GCC driver and are not stored in the ALI file. See -- also -gnatea above. when 'z' => Store_Switch := False; Disable_Switch_Storing; Ptr := Ptr + 1; -- All other -gnate? switches are unassigned when others => Bad_Switch ("-gnate" & Switch_Chars (Ptr .. Max)); end case; -- -gnatE (dynamic elaboration checks) when 'E' => Ptr := Ptr + 1; Dynamic_Elaboration_Checks := True; -- -gnatf (full error messages) when 'f' => Ptr := Ptr + 1; All_Errors_Mode := True; -- -gnatF (overflow of predefined float types) when 'F' => Ptr := Ptr + 1; External_Name_Exp_Casing := Uppercase; External_Name_Imp_Casing := Uppercase; -- -gnatg (GNAT implementation mode) when 'g' => Ptr := Ptr + 1; GNAT_Mode := True; Identifier_Character_Set := 'n'; System_Extend_Unit := Empty; Warning_Mode := Treat_As_Error; Style_Check_Main := True; -- Set Ada 2012 mode explicitly. We don't want to rely on the -- implicit setting here, since for example, we want -- Preelaborate_05 treated as Preelaborate Ada_Version := Ada_2012; Ada_Version_Explicit := Ada_2012; Ada_Version_Pragma := Empty; -- Set default warnings and style checks for -gnatg Set_GNAT_Mode_Warnings; Set_GNAT_Style_Check_Options; -- -gnatG (output generated code) when 'G' => Ptr := Ptr + 1; Print_Generated_Code := True; -- Scan optional integer line limit value if Nat_Present (Switch_Chars, Max, Ptr) then Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'G'); Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40); end if; -- -gnath (help information) when 'h' => Ptr := Ptr + 1; Usage_Requested := True; -- -gnati (character set) when 'i' => if Ptr = Max then Bad_Switch ("-gnati"); end if; Ptr := Ptr + 1; C := Switch_Chars (Ptr); if C in '1' .. '5' or else C = '8' or else C = '9' or else C = 'p' or else C = 'f' or else C = 'n' or else C = 'w' then Identifier_Character_Set := C; Ptr := Ptr + 1; else Bad_Switch ("-gnati" & Switch_Chars (Ptr .. Max)); end if; -- -gnatI (ignore representation clauses) when 'I' => Ptr := Ptr + 1; Ignore_Rep_Clauses := True; -- -gnatj (messages in limited length lines) when 'j' => Ptr := Ptr + 1; Scan_Nat (Switch_Chars, Max, Ptr, Error_Msg_Line_Length, C); -- -gnatk (limit file name length) when 'k' => Ptr := Ptr + 1; Scan_Pos (Switch_Chars, Max, Ptr, Maximum_File_Name_Length, C); -- -gnatl (output full source) when 'l' => Ptr := Ptr + 1; Full_List := True; -- There may be an equal sign between -gnatl and a file name if Ptr <= Max and then Switch_Chars (Ptr) = '=' then if Ptr = Max then Osint.Fail ("file name for -gnatl= is null"); else Opt.Full_List_File_Name := new String'(Switch_Chars (Ptr + 1 .. Max)); Ptr := Max + 1; end if; end if; -- -gnatL (corresponding source text) when 'L' => Ptr := Ptr + 1; Dump_Source_Text := True; -- -gnatm (max number or errors/warnings) when 'm' => Ptr := Ptr + 1; Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Messages, C); -- -gnatn (enable pragma Inline) when 'n' => Ptr := Ptr + 1; Inline_Active := True; -- There may be a digit (1 or 2) appended to the switch if Ptr <= Max then C := Switch_Chars (Ptr); if C in '1' .. '2' then Ptr := Ptr + 1; Inline_Level := Character'Pos (C) - Character'Pos ('0'); end if; end if; -- -gnatN (obsolescent) when 'N' => Ptr := Ptr + 1; Inline_Active := True; Front_End_Inlining := True; -- -gnato (overflow checks) when 'o' => Ptr := Ptr + 1; Suppress_Options.Suppress (Overflow_Check) := False; -- Case of no digits after the -gnato if Ptr > Max or else Switch_Chars (Ptr) not in '1' .. '3' then Suppress_Options.Overflow_Mode_General := Strict; Suppress_Options.Overflow_Mode_Assertions := Strict; -- At least one digit after the -gnato else -- Handle first digit after -gnato Suppress_Options.Overflow_Mode_General := Get_Overflow_Mode (Switch_Chars (Ptr)); Ptr := Ptr + 1; -- Only one digit after -gnato, set assertions mode to -- be the same as general mode. if Ptr > Max or else Switch_Chars (Ptr) not in '1' .. '3' then Suppress_Options.Overflow_Mode_Assertions := Suppress_Options.Overflow_Mode_General; -- Process second digit after -gnato else Suppress_Options.Overflow_Mode_Assertions := Get_Overflow_Mode (Switch_Chars (Ptr)); Ptr := Ptr + 1; end if; end if; -- -gnatO (specify name of the object file) -- This is an internal switch when 'O' => Store_Switch := False; Ptr := Ptr + 1; Output_File_Name_Present := True; -- -gnatp (suppress all checks) when 'p' => Ptr := Ptr + 1; -- Skip processing if cancelled by subsequent -gnat-p if Switch_Subsequently_Cancelled ("p", Args, Arg_Rank) then Store_Switch := False; else -- Set all specific options as well as All_Checks in the -- Suppress_Options array, excluding Elaboration_Check, -- since this is treated specially because we do not want -- -gnatp to disable static elaboration processing. Also -- exclude Atomic_Synchronization, since this is not a real -- check. for J in Suppress_Options.Suppress'Range loop if J /= Elaboration_Check and then J /= Atomic_Synchronization then Suppress_Options.Suppress (J) := True; end if; end loop; Validity_Checks_On := False; Opt.Suppress_Checks := True; end if; -- -gnatP (periodic poll) when 'P' => Ptr := Ptr + 1; Polling_Required := True; -- -gnatq (don't quit) when 'q' => Ptr := Ptr + 1; Try_Semantics := True; -- -gnatQ (always write ALI file) when 'Q' => Ptr := Ptr + 1; Force_ALI_Tree_File := True; Try_Semantics := True; -- -gnatr (restrictions as warnings) when 'r' => Ptr := Ptr + 1; Treat_Restrictions_As_Warnings := True; -- -gnatR (list rep. info) when 'R' => -- Not allowed if previous -gnatD given. See more extensive -- comments in the 'D' section for the inverse test. if Debug_Generated_Code then Osint.Fail ("-gnatR not permitted since -gnatD given previously"); end if; -- Not allowed if previous -gnatc was given, since we must -- call the code generator to determine rep information. if Operating_Mode = Check_Semantics then Osint.Fail ("-gnatR not permitted since -gnatc given previously"); end if; -- Set to annotate rep info, and set default -gnatR mode Back_Annotate_Rep_Info := True; List_Representation_Info := 1; -- Scan possible parameter Ptr := Ptr + 1; while Ptr <= Max loop C := Switch_Chars (Ptr); if C in '1' .. '3' then List_Representation_Info := Character'Pos (C) - Character'Pos ('0'); elsif Switch_Chars (Ptr) = 's' then List_Representation_Info_To_File := True; elsif Switch_Chars (Ptr) = 'm' then List_Representation_Info_Mechanisms := True; else Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max)); end if; Ptr := Ptr + 1; end loop; -- -gnats (syntax check only) when 's' => if not First_Switch then Osint.Fail ("-gnats must be first if combined with other switches"); end if; Ptr := Ptr + 1; Operating_Mode := Check_Syntax; -- -gnatS (print package Standard) when 'S' => Print_Standard := True; Ptr := Ptr + 1; -- -gnatt (output tree) when 't' => Ptr := Ptr + 1; Tree_Output := True; Back_Annotate_Rep_Info := True; -- -gnatT (change start of internal table sizes) when 'T' => Ptr := Ptr + 1; Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C); -- -gnatu (list units for compilation) when 'u' => Ptr := Ptr + 1; List_Units := True; -- -gnatU (unique tags) when 'U' => Ptr := Ptr + 1; Unique_Error_Tag := True; -- -gnatv (verbose mode) when 'v' => Ptr := Ptr + 1; Verbose_Mode := True; -- -gnatV (validity checks) when 'V' => Store_Switch := False; Ptr := Ptr + 1; if Ptr > Max then Bad_Switch ("-gnatV"); else declare OK : Boolean; begin Set_Validity_Check_Options (Switch_Chars (Ptr .. Max), OK, Ptr); if not OK then Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max)); end if; for Index in First_Char + 1 .. Max loop Store_Compilation_Switch ("-gnatV" & Switch_Chars (Index)); end loop; end; end if; Ptr := Max + 1; -- -gnatw (warning modes) when 'w' => Store_Switch := False; Ptr := Ptr + 1; if Ptr > Max then Bad_Switch ("-gnatw"); end if; while Ptr <= Max loop C := Switch_Chars (Ptr); -- Case of dot switch if C = '.' and then Ptr < Max then Ptr := Ptr + 1; C := Switch_Chars (Ptr); if Set_Dot_Warning_Switch (C) then Store_Compilation_Switch ("-gnatw." & C); else Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max)); end if; -- Normal case, no dot else if Set_Warning_Switch (C) then Store_Compilation_Switch ("-gnatw" & C); else Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max)); end if; end if; Ptr := Ptr + 1; end loop; return; -- -gnatW (wide character encoding method) when 'W' => Ptr := Ptr + 1; if Ptr > Max then Bad_Switch ("-gnatW"); end if; begin Wide_Character_Encoding_Method := Get_WC_Encoding_Method (Switch_Chars (Ptr)); exception when Constraint_Error => Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max)); end; Wide_Character_Encoding_Method_Specified := True; Upper_Half_Encoding := Wide_Character_Encoding_Method in WC_Upper_Half_Encoding_Method; Ptr := Ptr + 1; -- -gnatx (suppress cross-ref information) when 'x' => Ptr := Ptr + 1; Xref_Active := False; -- -gnatX (language extensions) when 'X' => Ptr := Ptr + 1; Extensions_Allowed := True; Ada_Version := Ada_Version_Type'Last; Ada_Version_Explicit := Ada_Version_Type'Last; Ada_Version_Pragma := Empty; -- -gnaty (style checks) when 'y' => Ptr := Ptr + 1; Style_Check_Main := True; if Ptr > Max then Set_Default_Style_Check_Options; else Store_Switch := False; declare OK : Boolean; begin Set_Style_Check_Options (Switch_Chars (Ptr .. Max), OK, Ptr); if not OK then Osint.Fail ("bad -gnaty switch (" & Style_Msg_Buf (1 .. Style_Msg_Len) & ')'); end if; Ptr := First_Char + 1; while Ptr <= Max loop if Switch_Chars (Ptr) = 'M' then First_Char := Ptr; loop Ptr := Ptr + 1; exit when Ptr > Max or else Switch_Chars (Ptr) not in '0' .. '9'; end loop; Store_Compilation_Switch ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1)); else Store_Compilation_Switch ("-gnaty" & Switch_Chars (Ptr)); Ptr := Ptr + 1; end if; end loop; end; end if; -- -gnatz (stub generation) when 'z' => -- -gnatz must be the first and only switch in Switch_Chars, -- and is a two-letter switch. if Ptr /= Switch_Chars'First + 5 or else (Max - Ptr + 1) > 2 then Osint.Fail ("-gnatz* may not be combined with other switches"); end if; if Ptr = Max then Bad_Switch ("-gnatz"); end if; Ptr := Ptr + 1; -- Only one occurrence of -gnat* is permitted if Distribution_Stub_Mode = No_Stubs then case Switch_Chars (Ptr) is when 'r' => Distribution_Stub_Mode := Generate_Receiver_Stub_Body; when 'c' => Distribution_Stub_Mode := Generate_Caller_Stub_Body; when others => Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max)); end case; Ptr := Ptr + 1; else Osint.Fail ("only one -gnatz* switch allowed"); end if; -- -gnatZ (obsolescent) when 'Z' => Ptr := Ptr + 1; Osint.Fail ("-gnatZ is no longer supported: consider using --RTS=zcx"); -- Note on language version switches: whenever a new language -- version switch is added, Switch.M.Normalize_Compiler_Switches -- must be updated. -- -gnat83 when '8' => if Ptr = Max then Bad_Switch ("-gnat8"); end if; Ptr := Ptr + 1; if Switch_Chars (Ptr) /= '3' then Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max)); else Ptr := Ptr + 1; Ada_Version := Ada_83; Ada_Version_Explicit := Ada_83; Ada_Version_Pragma := Empty; end if; -- -gnat95 when '9' => if Ptr = Max then Bad_Switch ("-gnat9"); end if; Ptr := Ptr + 1; if Switch_Chars (Ptr) /= '5' then Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max)); else Ptr := Ptr + 1; Ada_Version := Ada_95; Ada_Version_Explicit := Ada_95; Ada_Version_Pragma := Empty; end if; -- -gnat05 when '0' => if Ptr = Max then Bad_Switch ("-gnat0"); end if; Ptr := Ptr + 1; if Switch_Chars (Ptr) /= '5' then Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max)); else Ptr := Ptr + 1; Ada_Version := Ada_2005; Ada_Version_Explicit := Ada_2005; Ada_Version_Pragma := Empty; end if; -- -gnat12 when '1' => if Ptr = Max then Bad_Switch ("-gnat1"); end if; Ptr := Ptr + 1; if Switch_Chars (Ptr) /= '2' then Bad_Switch ("-gnat1" & Switch_Chars (Ptr .. Max)); else Ptr := Ptr + 1; Ada_Version := Ada_2012; Ada_Version_Explicit := Ada_2012; Ada_Version_Pragma := Empty; end if; -- -gnat2005 and -gnat2012 when '2' => if Ptr > Max - 3 then Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max)); elsif Switch_Chars (Ptr .. Ptr + 3) = "2005" then Ada_Version := Ada_2005; elsif Switch_Chars (Ptr .. Ptr + 3) = "2012" then Ada_Version := Ada_2012; else Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Ptr + 3)); end if; Ada_Version_Explicit := Ada_Version; Ada_Version_Pragma := Empty; Ptr := Ptr + 4; -- Switch cancellation, currently only -gnat-p is allowed. -- All we do here is the error checking, since the actual -- processing for switch cancellation is done by calls to -- Switch_Subsequently_Cancelled at the appropriate point. when '-' => -- Simple ignore -gnat-p if Switch_Chars = "-gnat-p" then return; -- Any other occurrence of minus is ignored. This is for -- maximum compatibility with previous version which ignored -- all occurrences of minus. else Store_Switch := False; Ptr := Ptr + 1; end if; -- We ignore '/' in switches, this is historical, still needed??? when '/' => Store_Switch := False; -- Anything else is an error (illegal switch character) when others => Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max)); end case; if Store_Switch then Store_Compilation_Switch ("-gnat" & Switch_Chars (First_Char .. Ptr - 1)); end if; First_Switch := False; end loop; end if; end Scan_Front_End_Switches; ----------------------------------- -- Switch_Subsequently_Cancelled -- ----------------------------------- function Switch_Subsequently_Cancelled (C : String; Args : String_List; Arg_Rank : Positive) return Boolean is begin -- Loop through arguments following the current one for Arg in Arg_Rank + 1 .. Args'Last loop if Args (Arg).all = "-gnat-" & C then return True; end if; end loop; -- No match found, not cancelled return False; end Switch_Subsequently_Cancelled; end Switch.C;