1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2001-2014, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This package is for switch processing and should not depend on higher level
27 -- packages such as those for the scanner, parser, etc. Doing so may cause
28 -- circularities, especially for back ends using Adabkend.
30 with Debug; use Debug;
32 with Osint; use Osint;
34 with Stylesw; use Stylesw;
35 with Ttypes; use Ttypes;
36 with Validsw; use Validsw;
37 with Warnsw; use Warnsw;
39 with Ada.Unchecked_Deallocation;
40 with System.WCh_Con; use System.WCh_Con;
42 package body Switch.C is
44 RTS_Specified : String_Access := null;
45 -- Used to detect multiple use of --RTS= flag
47 procedure Add_Symbol_Definition (Def : String);
48 -- Add a symbol definition from the command line
51 new Ada.Unchecked_Deallocation (String_List, String_List_Access);
52 -- Avoid using System.Strings.Free, which also frees the designated strings
54 function Get_Overflow_Mode (C : Character) return Overflow_Mode_Type;
55 -- Given a digit in the range 0 .. 3, returns the corresponding value of
56 -- Overflow_Mode_Type. Raises Program_Error if C is outside this range.
58 function Switch_Subsequently_Cancelled
61 Arg_Rank : Positive) return Boolean;
62 -- This function is called from Scan_Front_End_Switches. It determines if
63 -- the switch currently being scanned is followed by a switch of the form
64 -- "-gnat-" & C, where C is the argument. If so, then True is returned,
65 -- and Scan_Front_End_Switches will cancel the effect of the switch. If
66 -- no such switch is found, False is returned.
68 ---------------------------
69 -- Add_Symbol_Definition --
70 ---------------------------
72 procedure Add_Symbol_Definition (Def : String) is
74 -- If Preprocessor_Symbol_Defs is not large enough, double its size
76 if Preprocessing_Symbol_Last = Preprocessing_Symbol_Defs'Last then
78 New_Symbol_Definitions : constant String_List_Access :=
79 new String_List (1 .. 2 * Preprocessing_Symbol_Last);
81 New_Symbol_Definitions (Preprocessing_Symbol_Defs'Range) :=
82 Preprocessing_Symbol_Defs.all;
83 Free (Preprocessing_Symbol_Defs);
84 Preprocessing_Symbol_Defs := New_Symbol_Definitions;
88 Preprocessing_Symbol_Last := Preprocessing_Symbol_Last + 1;
89 Preprocessing_Symbol_Defs (Preprocessing_Symbol_Last) :=
91 end Add_Symbol_Definition;
93 -----------------------
94 -- Get_Overflow_Mode --
95 -----------------------
97 function Get_Overflow_Mode (C : Character) return Overflow_Mode_Type is
106 -- Eliminated allowed only if Long_Long_Integer is 64 bits (since
107 -- the current implementation of System.Bignums assumes this).
110 if Standard_Long_Long_Integer_Size /= 64 then
111 Bad_Switch ("-gnato3 not implemented for this configuration");
119 end Get_Overflow_Mode;
121 -----------------------------
122 -- Scan_Front_End_Switches --
123 -----------------------------
125 procedure Scan_Front_End_Switches
126 (Switch_Chars : String;
130 First_Switch : Boolean := True;
131 -- False for all but first switch
133 Max : constant Natural := Switch_Chars'Last;
135 C : Character := ' ';
138 Store_Switch : Boolean;
139 -- For -gnatxx switches, the normal processing, signalled by this flag
140 -- being set to True, is to store the switch on exit from the case
141 -- statement, the switch stored is -gnat followed by the characters
142 -- from First_Char to Ptr-1. For cases like -gnaty, where the switch
143 -- is stored in separate pieces, this flag is set to False, and the
144 -- appropriate calls to Store_Compilation_Switch are made from within
147 First_Char : Positive;
148 -- Marks start of switch to be stored
150 First_Ptr : Positive;
151 -- Save position of first character after -gnatd (for checking that
152 -- debug flags that must come first are first, in particular -gnatd.b),
155 Ptr := Switch_Chars'First;
157 -- Skip past the initial character (must be the switch character)
165 -- Handle switches that do not start with -gnat
167 if Ptr + 3 > Max or else Switch_Chars (Ptr .. Ptr + 3) /= "gnat" then
169 -- There are two front-end switches that do not start with -gnat:
172 if Switch_Chars (Ptr) = 'I' then
174 -- Set flag Search_Directory_Present if switch is "-I" only:
175 -- the directory will be the next argument.
178 Search_Directory_Present := True;
184 -- Find out whether this is a -I- or regular -Ixxx switch
186 -- Note: -I switches are not recorded in the ALI file, since the
187 -- meaning of the program depends on the source files compiled,
188 -- not where they came from.
190 if Ptr = Max and then Switch_Chars (Ptr) = '-' then
191 Look_In_Primary_Dir := False;
193 Add_Src_Search_Dir (Switch_Chars (Ptr .. Max));
196 -- Processing of the --RTS switch. --RTS may have been modified by
197 -- gcc into -fRTS (for GCC targets).
200 and then (Switch_Chars (Ptr .. Ptr + 3) = "fRTS"
202 Switch_Chars (Ptr .. Ptr + 3) = "-RTS")
207 or else Switch_Chars (Ptr + 3) /= '='
209 Osint.Fail ("missing path for --RTS");
211 -- Check that this is the first time --RTS is specified or if
212 -- it is not the first time, the same path has been specified.
214 if RTS_Specified = null then
215 RTS_Specified := new String'(Switch_Chars (Ptr + 4 .. Max));
218 RTS_Specified.all /= Switch_Chars (Ptr + 4 .. Max)
220 Osint.Fail ("--RTS cannot be specified multiple times");
223 -- Valid --RTS switch
225 Opt.No_Stdinc := True;
226 Opt.RTS_Switch := True;
230 (Switch_Chars (Ptr + 4 .. Max), Include);
234 (Switch_Chars (Ptr + 4 .. Max), Objects);
236 if RTS_Src_Path_Name /= null
237 and then RTS_Lib_Path_Name /= null
239 -- Store the -fRTS switch (Note: Store_Compilation_Switch
240 -- changes -fRTS back into --RTS for the actual output).
242 Store_Compilation_Switch (Switch_Chars);
244 elsif RTS_Src_Path_Name = null
245 and then RTS_Lib_Path_Name = null
247 Osint.Fail ("RTS path not valid: missing " &
248 "adainclude and adalib directories");
250 elsif RTS_Src_Path_Name = null then
251 Osint.Fail ("RTS path not valid: missing " &
252 "adainclude directory");
254 elsif RTS_Lib_Path_Name = null then
255 Osint.Fail ("RTS path not valid: missing " &
260 -- There are no other switches not starting with -gnat
263 Bad_Switch (Switch_Chars);
266 -- Case of switch starting with -gnat
271 -- Loop to scan through switches given in switch string
273 while Ptr <= Max loop
275 Store_Switch := True;
277 C := Switch_Chars (Ptr);
281 -- -gnata (assertions enabled)
285 Assertions_Enabled := True;
287 -- -gnatA (disregard gnat.adc)
291 Config_File := False;
293 -- -gnatb (brief messages to stderr)
297 Brief_Output := True;
299 -- -gnatB (assume no invalid values)
303 Assume_No_Invalid_Values := True;
305 -- -gnatc (check syntax and semantics only)
308 if not First_Switch then
310 ("-gnatc must be first if combined with other switches");
314 Operating_Mode := Check_Semantics;
316 -- -gnatC (Generate CodePeer information)
321 if not CodePeer_Mode then
322 CodePeer_Mode := True;
324 -- Suppress compiler warnings by default, since what we are
325 -- interested in here is what CodePeer can find out. Note
326 -- that if -gnatwxxx is specified after -gnatC on the
327 -- command line, we do not want to override this setting in
328 -- Adjust_Global_Switches, and assume that the user wants to
329 -- get both warnings from GNAT and CodePeer messages.
331 Warning_Mode := Suppress;
334 -- -gnatd (compiler debug options)
337 Store_Switch := False;
339 First_Ptr := Ptr + 1;
341 -- Note: for the debug switch, the remaining characters in this
342 -- switch field must all be debug flags, since all valid switch
343 -- characters are also valid debug characters.
345 -- Loop to scan out debug flags
349 C := Switch_Chars (Ptr);
350 exit when C = ASCII.NUL or else C = '/' or else C = '-';
352 if C in '1' .. '9' or else
353 C in 'a' .. 'z' or else
356 -- Case of dotted flag
359 Set_Dotted_Debug_Flag (C);
360 Store_Compilation_Switch ("-gnatd." & C);
362 -- Special check, -gnatd.b must come first
365 and then (Ptr /= First_Ptr + 1
366 or else not First_Switch)
369 ("-gnatd.b must be first if combined "
370 & "with other switches");
377 Store_Compilation_Switch ("-gnatd" & C);
384 Bad_Switch ("-gnatd." & Switch_Chars (Ptr .. Max));
386 Bad_Switch ("-gnatd" & Switch_Chars (Ptr .. Max));
392 -- -gnatD (debug expanded code)
397 -- Not allowed if previous -gnatR given
399 -- The reason for this prohibition is that the rewriting of
400 -- Sloc values causes strange malfunctions in the tests of
401 -- whether units belong to the main source. This is really a
402 -- bug, but too hard to fix for a marginal capability ???
404 -- The proper fix is to completely redo -gnatD processing so
405 -- that the tree is not messed with, and instead a separate
406 -- table is built on the side for debug information generation.
408 if List_Representation_Info /= 0 then
410 ("-gnatD not permitted since -gnatR given previously");
413 -- Scan optional integer line limit value
415 if Nat_Present (Switch_Chars, Max, Ptr) then
416 Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'D');
417 Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40);
420 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
421 -- generation in the ali file) since otherwise this generation
422 -- gets confused by the "wrong" Sloc values put in the tree.
424 Debug_Generated_Code := True;
425 Xref_Active := False;
426 Set_Debug_Flag ('g');
428 -- -gnate? (extended switches)
433 -- The -gnate? switches are all double character switches
434 -- so we must always have a character after the e.
437 Bad_Switch ("-gnate");
440 case Switch_Chars (Ptr) is
442 -- -gnatea (initial delimiter of explicit switches)
444 -- This is an internal switch
446 -- All switches that come before -gnatea have been added by
447 -- the GCC driver and are not stored in the ALI file.
448 -- See also -gnatez below.
451 Store_Switch := False;
452 Enable_Switch_Storing;
455 -- -gnateA (aliasing checks on parameters)
459 Check_Aliasing_Of_Parameters := True;
461 -- -gnatec (configuration pragmas)
464 Store_Switch := False;
467 -- There may be an equal sign between -gnatec and
468 -- the path name of the config file.
470 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
475 Bad_Switch ("-gnatec");
479 Config_File_Name : constant String_Access :=
481 (Switch_Chars (Ptr .. Max));
484 if Config_File_Names = null then
486 new String_List'(1 => Config_File_Name);
490 New_Names : constant String_List_Access :=
493 Config_File_Names'Length + 1);
496 for Index in Config_File_Names'Range loop
498 Config_File_Names (Index);
499 Config_File_Names (Index) := null;
502 New_Names (New_Names'Last) := Config_File_Name;
503 Free (Config_File_Names);
504 Config_File_Names := New_Names;
511 -- -gnateC switch (generate CodePeer messages)
515 Generate_CodePeer_Messages := True;
517 -- -gnated switch (disable atomic synchronization)
520 Suppress_Options.Suppress (Atomic_Synchronization) :=
523 -- -gnateD switch (preprocessing symbol definition)
526 Store_Switch := False;
530 Bad_Switch ("-gnateD");
533 Add_Symbol_Definition (Switch_Chars (Ptr .. Max));
537 Store_Compilation_Switch
538 ("-gnateD" & Switch_Chars (Ptr .. Max));
541 -- -gnateE (extra exception information)
544 Exception_Extra_Info := True;
547 -- -gnatef (full source path for brief error messages)
550 Store_Switch := False;
552 Full_Path_Name_For_Brief_Errors := True;
554 -- -gnateF (Check_Float_Overflow)
558 Check_Float_Overflow := True;
560 -- -gnateG (save preprocessor output)
563 Generate_Processed_File := True;
566 -- -gnatei (max number of instantiations)
571 (Switch_Chars, Max, Ptr, Maximum_Instantiations, C);
573 -- -gnateI (index of unit in multi-unit source)
577 Scan_Pos (Switch_Chars, Max, Ptr, Multiple_Unit_Index, C);
583 Elab_Info_Messages := True;
589 Elab_Info_Messages := False;
591 -- -gnatem (mapping file)
594 Store_Switch := False;
597 -- There may be an equal sign between -gnatem and
598 -- the path name of the mapping file.
600 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
605 Bad_Switch ("-gnatem");
609 new String'(Switch_Chars (Ptr .. Max));
612 -- -gnateO= (object path file)
614 -- This is an internal switch
617 Store_Switch := False;
622 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
623 Bad_Switch ("-gnateO");
625 Object_Path_File_Name :=
626 new String'(Switch_Chars (Ptr + 1 .. Max));
631 -- -gnatep (preprocessing data file)
634 Store_Switch := False;
637 -- There may be an equal sign between -gnatep and
638 -- the path name of the mapping file.
640 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
645 Bad_Switch ("-gnatep");
648 Preprocessing_Data_File :=
649 new String'(Switch_Chars (Ptr .. Max));
651 -- Store the switch, normalizing to -gnatep=
653 Store_Compilation_Switch
654 ("-gnatep=" & Preprocessing_Data_File.all);
658 -- -gnateP (Treat pragma Pure/Preelaborate errs as warnings)
661 Treat_Categorization_Errors_As_Warnings := True;
663 -- -gnates=file (specify extra file switches for gnat2why)
665 -- This is an internal switch
668 if not First_Switch then
670 ("-gnates must not be combined with other switches");
677 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
678 Bad_Switch ("-gnates");
680 SPARK_Switches_File_Name :=
681 new String'(Switch_Chars (Ptr + 1 .. Max));
686 -- -gnateS (generate SCO information)
688 -- Include Source Coverage Obligation information in ALI
689 -- files for use by source coverage analysis tools
690 -- (gnatcov) (equivalent to -fdump-scos, provided for
691 -- backwards compatibility).
694 Generate_SCO := True;
695 Generate_SCO_Instance_Table := True;
698 -- -gnatet (write target dependent information)
701 if not First_Switch then
703 ("-gnatet must not be combined with other switches");
710 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
711 Bad_Switch ("-gnatet");
713 Target_Dependent_Info_Write_Name :=
714 new String'(Switch_Chars (Ptr + 1 .. Max));
719 -- -gnateT (read target dependent information)
722 if not First_Switch then
724 ("-gnateT must not be combined with other switches");
731 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
732 Bad_Switch ("-gnateT");
734 -- This parameter was stored by Set_Targ earlier
737 (Target_Dependent_Info_Read_Name.all =
738 Switch_Chars (Ptr + 1 .. Max));
744 -- -gnateu (unrecognized y,V,w switches)
748 Ignore_Unrecognized_VWY_Switches := True;
750 -- -gnateV (validity checks on parameters)
754 Check_Validity_Of_Parameters := True;
756 -- -gnateY (ignore Style_Checks pragmas)
759 Ignore_Style_Checks_Pragmas := True;
762 -- -gnatez (final delimiter of explicit switches)
764 -- This is an internal switch
766 -- All switches that come after -gnatez have been added by
767 -- the GCC driver and are not stored in the ALI file. See
768 -- also -gnatea above.
771 Store_Switch := False;
772 Disable_Switch_Storing;
775 -- All other -gnate? switches are unassigned
778 Bad_Switch ("-gnate" & Switch_Chars (Ptr .. Max));
781 -- -gnatE (dynamic elaboration checks)
785 Dynamic_Elaboration_Checks := True;
787 -- -gnatf (full error messages)
791 All_Errors_Mode := True;
793 -- -gnatF (overflow of predefined float types)
797 External_Name_Exp_Casing := Uppercase;
798 External_Name_Imp_Casing := Uppercase;
800 -- -gnatg (GNAT implementation mode)
805 Identifier_Character_Set := 'n';
806 System_Extend_Unit := Empty;
807 Warning_Mode := Treat_As_Error;
808 Style_Check_Main := True;
809 Ada_Version := Ada_2012;
810 Ada_Version_Explicit := Ada_2012;
811 Ada_Version_Pragma := Empty;
813 -- Set default warnings and style checks for -gnatg
815 Set_GNAT_Mode_Warnings;
816 Set_GNAT_Style_Check_Options;
818 -- -gnatG (output generated code)
822 Print_Generated_Code := True;
824 -- Scan optional integer line limit value
826 if Nat_Present (Switch_Chars, Max, Ptr) then
827 Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'G');
828 Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40);
831 -- -gnath (help information)
835 Usage_Requested := True;
837 -- -gnati (character set)
841 Bad_Switch ("-gnati");
845 C := Switch_Chars (Ptr);
855 Identifier_Character_Set := C;
859 Bad_Switch ("-gnati" & Switch_Chars (Ptr .. Max));
862 -- -gnatI (ignore representation clauses)
866 Ignore_Rep_Clauses := True;
868 -- -gnatj (messages in limited length lines)
872 Scan_Nat (Switch_Chars, Max, Ptr, Error_Msg_Line_Length, C);
874 -- -gnatk (limit file name length)
879 (Switch_Chars, Max, Ptr, Maximum_File_Name_Length, C);
881 -- -gnatl (output full source)
887 -- There may be an equal sign between -gnatl and a file name
889 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
891 Osint.Fail ("file name for -gnatl= is null");
893 Opt.Full_List_File_Name :=
894 new String'(Switch_Chars (Ptr + 1 .. Max));
899 -- -gnatL (corresponding source text)
903 Dump_Source_Text := True;
905 -- -gnatm (max number or errors/warnings)
909 Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Messages, C);
911 -- -gnatn (enable pragma Inline)
915 Inline_Active := True;
917 -- There may be a digit (1 or 2) appended to the switch
920 C := Switch_Chars (Ptr);
922 if C in '1' .. '2' then
924 Inline_Level := Character'Pos (C) - Character'Pos ('0');
928 -- -gnatN (obsolescent)
932 Inline_Active := True;
933 Front_End_Inlining := True;
935 -- -gnato (overflow checks)
939 Suppress_Options.Suppress (Overflow_Check) := False;
941 -- Case of no digits after the -gnato
943 if Ptr > Max or else Switch_Chars (Ptr) not in '1' .. '3' then
944 Suppress_Options.Overflow_Mode_General := Strict;
945 Suppress_Options.Overflow_Mode_Assertions := Strict;
947 -- At least one digit after the -gnato
950 -- Handle first digit after -gnato
952 Suppress_Options.Overflow_Mode_General :=
953 Get_Overflow_Mode (Switch_Chars (Ptr));
956 -- Only one digit after -gnato, set assertions mode to
957 -- be the same as general mode.
960 or else Switch_Chars (Ptr) not in '1' .. '3'
962 Suppress_Options.Overflow_Mode_Assertions :=
963 Suppress_Options.Overflow_Mode_General;
965 -- Process second digit after -gnato
968 Suppress_Options.Overflow_Mode_Assertions :=
969 Get_Overflow_Mode (Switch_Chars (Ptr));
974 -- -gnatO (specify name of the object file)
976 -- This is an internal switch
979 Store_Switch := False;
981 Output_File_Name_Present := True;
983 -- -gnatp (suppress all checks)
988 -- Skip processing if cancelled by subsequent -gnat-p
990 if Switch_Subsequently_Cancelled ("p", Args, Arg_Rank) then
991 Store_Switch := False;
994 -- Set all specific options as well as All_Checks in the
995 -- Suppress_Options array, excluding Elaboration_Check,
996 -- since this is treated specially because we do not want
997 -- -gnatp to disable static elaboration processing. Also
998 -- exclude Atomic_Synchronization, since this is not a real
1001 for J in Suppress_Options.Suppress'Range loop
1002 if J /= Elaboration_Check
1004 J /= Atomic_Synchronization
1006 Suppress_Options.Suppress (J) := True;
1010 Validity_Checks_On := False;
1011 Opt.Suppress_Checks := True;
1014 -- -gnatP (periodic poll)
1018 Polling_Required := True;
1020 -- -gnatq (don't quit)
1024 Try_Semantics := True;
1026 -- -gnatQ (always write ALI file)
1030 Force_ALI_Tree_File := True;
1031 Try_Semantics := True;
1033 -- -gnatr (restrictions as warnings)
1037 Treat_Restrictions_As_Warnings := True;
1039 -- -gnatR (list rep. info)
1043 -- Not allowed if previous -gnatD given. See more extensive
1044 -- comments in the 'D' section for the inverse test.
1046 if Debug_Generated_Code then
1048 ("-gnatR not permitted since -gnatD given previously");
1051 -- Set to annotate rep info, and set default -gnatR mode
1053 Back_Annotate_Rep_Info := True;
1054 List_Representation_Info := 1;
1056 -- Scan possible parameter
1059 while Ptr <= Max loop
1060 C := Switch_Chars (Ptr);
1062 if C in '1' .. '3' then
1063 List_Representation_Info :=
1064 Character'Pos (C) - Character'Pos ('0');
1066 elsif Switch_Chars (Ptr) = 's' then
1067 List_Representation_Info_To_File := True;
1069 elsif Switch_Chars (Ptr) = 'm' then
1070 List_Representation_Info_Mechanisms := True;
1073 Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max));
1079 -- -gnats (syntax check only)
1082 if not First_Switch then
1084 ("-gnats must be first if combined with other switches");
1088 Operating_Mode := Check_Syntax;
1090 -- -gnatS (print package Standard)
1093 Print_Standard := True;
1096 -- -gnatt (output tree)
1100 Tree_Output := True;
1101 Back_Annotate_Rep_Info := True;
1103 -- -gnatT (change start of internal table sizes)
1107 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C);
1109 -- -gnatu (list units for compilation)
1115 -- -gnatU (unique tags)
1119 Unique_Error_Tag := True;
1121 -- -gnatv (verbose mode)
1125 Verbose_Mode := True;
1127 -- -gnatV (validity checks)
1130 Store_Switch := False;
1134 Bad_Switch ("-gnatV");
1141 Set_Validity_Check_Options
1142 (Switch_Chars (Ptr .. Max), OK, Ptr);
1145 Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max));
1148 for Index in First_Char + 1 .. Max loop
1149 Store_Compilation_Switch
1150 ("-gnatV" & Switch_Chars (Index));
1157 -- -gnatw (warning modes)
1160 Store_Switch := False;
1164 Bad_Switch ("-gnatw");
1167 while Ptr <= Max loop
1168 C := Switch_Chars (Ptr);
1170 -- Case of dot switch
1172 if C = '.' and then Ptr < Max then
1174 C := Switch_Chars (Ptr);
1176 if Set_Dot_Warning_Switch (C) then
1177 Store_Compilation_Switch ("-gnatw." & C);
1179 Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max));
1182 -- Normal case, no dot
1185 if Set_Warning_Switch (C) then
1186 Store_Compilation_Switch ("-gnatw" & C);
1188 Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max));
1197 -- -gnatW (wide character encoding method)
1203 Bad_Switch ("-gnatW");
1207 Wide_Character_Encoding_Method :=
1208 Get_WC_Encoding_Method (Switch_Chars (Ptr));
1210 when Constraint_Error =>
1211 Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max));
1214 Wide_Character_Encoding_Method_Specified := True;
1216 Upper_Half_Encoding :=
1217 Wide_Character_Encoding_Method in
1218 WC_Upper_Half_Encoding_Method;
1222 -- -gnatx (suppress cross-ref information)
1226 Xref_Active := False;
1228 -- -gnatX (language extensions)
1232 Extensions_Allowed := True;
1233 Ada_Version := Ada_Version_Type'Last;
1234 Ada_Version_Explicit := Ada_Version_Type'Last;
1235 Ada_Version_Pragma := Empty;
1237 -- -gnaty (style checks)
1241 Style_Check_Main := True;
1244 Set_Default_Style_Check_Options;
1247 Store_Switch := False;
1253 Set_Style_Check_Options
1254 (Switch_Chars (Ptr .. Max), OK, Ptr);
1258 ("bad -gnaty switch (" &
1259 Style_Msg_Buf (1 .. Style_Msg_Len) & ')');
1262 Ptr := First_Char + 1;
1263 while Ptr <= Max loop
1264 if Switch_Chars (Ptr) = 'M' then
1269 or else Switch_Chars (Ptr) not in '0' .. '9';
1272 Store_Compilation_Switch
1273 ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1));
1276 Store_Compilation_Switch
1277 ("-gnaty" & Switch_Chars (Ptr));
1284 -- -gnatz (stub generation)
1288 -- -gnatz must be the first and only switch in Switch_Chars,
1289 -- and is a two-letter switch.
1291 if Ptr /= Switch_Chars'First + 5
1292 or else (Max - Ptr + 1) > 2
1295 ("-gnatz* may not be combined with other switches");
1299 Bad_Switch ("-gnatz");
1304 -- Only one occurrence of -gnat* is permitted
1306 if Distribution_Stub_Mode = No_Stubs then
1307 case Switch_Chars (Ptr) is
1309 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
1312 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
1315 Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max));
1321 Osint.Fail ("only one -gnatz* switch allowed");
1324 -- -gnatZ (obsolescent)
1329 ("-gnatZ is no longer supported: consider using --RTS=zcx");
1331 -- Note on language version switches: whenever a new language
1332 -- version switch is added, Switch.M.Normalize_Compiler_Switches
1339 Bad_Switch ("-gnat8");
1344 if Switch_Chars (Ptr) /= '3' then
1345 Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max));
1348 Ada_Version := Ada_83;
1349 Ada_Version_Explicit := Ada_83;
1350 Ada_Version_Pragma := Empty;
1357 Bad_Switch ("-gnat9");
1362 if Switch_Chars (Ptr) /= '5' then
1363 Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max));
1366 Ada_Version := Ada_95;
1367 Ada_Version_Explicit := Ada_95;
1368 Ada_Version_Pragma := Empty;
1375 Bad_Switch ("-gnat0");
1380 if Switch_Chars (Ptr) /= '5' then
1381 Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max));
1384 Ada_Version := Ada_2005;
1385 Ada_Version_Explicit := Ada_2005;
1386 Ada_Version_Pragma := Empty;
1393 Bad_Switch ("-gnat1");
1398 if Switch_Chars (Ptr) /= '2' then
1399 Bad_Switch ("-gnat1" & Switch_Chars (Ptr .. Max));
1402 Ada_Version := Ada_2012;
1403 Ada_Version_Explicit := Ada_2012;
1404 Ada_Version_Pragma := Empty;
1407 -- -gnat2005 and -gnat2012
1410 if Ptr > Max - 3 then
1411 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1413 elsif Switch_Chars (Ptr .. Ptr + 3) = "2005" then
1414 Ada_Version := Ada_2005;
1416 elsif Switch_Chars (Ptr .. Ptr + 3) = "2012" then
1417 Ada_Version := Ada_2012;
1420 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Ptr + 3));
1423 Ada_Version_Explicit := Ada_Version;
1424 Ada_Version_Pragma := Empty;
1427 -- Switch cancellation, currently only -gnat-p is allowed.
1428 -- All we do here is the error checking, since the actual
1429 -- processing for switch cancellation is done by calls to
1430 -- Switch_Subsequently_Cancelled at the appropriate point.
1434 -- Simple ignore -gnat-p
1436 if Switch_Chars = "-gnat-p" then
1439 -- Any other occurrence of minus is ignored. This is for
1440 -- maximum compatibility with previous version which ignored
1441 -- all occurrences of minus.
1444 Store_Switch := False;
1448 -- We ignore '/' in switches, this is historical, still needed???
1451 Store_Switch := False;
1453 -- Anything else is an error (illegal switch character)
1456 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1459 if Store_Switch then
1460 Store_Compilation_Switch
1461 ("-gnat" & Switch_Chars (First_Char .. Ptr - 1));
1464 First_Switch := False;
1467 end Scan_Front_End_Switches;
1469 -----------------------------------
1470 -- Switch_Subsequently_Cancelled --
1471 -----------------------------------
1473 function Switch_Subsequently_Cancelled
1476 Arg_Rank : Positive) return Boolean
1479 -- Loop through arguments following the current one
1481 for Arg in Arg_Rank + 1 .. Args'Last loop
1482 if Args (Arg).all = "-gnat-" & C then
1487 -- No match found, not cancelled
1490 end Switch_Subsequently_Cancelled;