1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2001-2013, 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");
313 -- Not allowed if previous -gnatR given
315 if List_Representation_Info
/= 0
316 or else List_Representation_Info_Mechanisms
319 ("-gnatc not allowed since -gnatR given previously");
323 Operating_Mode
:= Check_Semantics
;
325 -- -gnatC (Generate CodePeer information)
330 if not CodePeer_Mode
then
331 CodePeer_Mode
:= True;
333 -- Suppress compiler warnings by default, since what we are
334 -- interested in here is what CodePeer can find out. Note
335 -- that if -gnatwxxx is specified after -gnatC on the
336 -- command line, we do not want to override this setting in
337 -- Adjust_Global_Switches, and assume that the user wants to
338 -- get both warnings from GNAT and CodePeer messages.
340 Warning_Mode
:= Suppress
;
343 -- -gnatd (compiler debug options)
346 Store_Switch
:= False;
348 First_Ptr
:= Ptr
+ 1;
350 -- Note: for the debug switch, the remaining characters in this
351 -- switch field must all be debug flags, since all valid switch
352 -- characters are also valid debug characters.
354 -- Loop to scan out debug flags
358 C
:= Switch_Chars
(Ptr
);
359 exit when C
= ASCII
.NUL
or else C
= '/' or else C
= '-';
361 if C
in '1' .. '9' or else
362 C
in 'a' .. 'z' or else
365 -- Case of dotted flag
368 Set_Dotted_Debug_Flag
(C
);
369 Store_Compilation_Switch
("-gnatd." & C
);
371 -- Special check, -gnatd.b must come first
374 and then (Ptr
/= First_Ptr
+ 1
375 or else not First_Switch
)
378 ("-gnatd.b must be first if combined "
379 & "with other switches");
386 Store_Compilation_Switch
("-gnatd" & C
);
393 Bad_Switch
("-gnatd." & Switch_Chars
(Ptr
.. Max
));
395 Bad_Switch
("-gnatd" & Switch_Chars
(Ptr
.. Max
));
401 -- -gnatD (debug expanded code)
406 -- Not allowed if previous -gnatR given
408 -- The reason for this prohibition is that the rewriting of
409 -- Sloc values causes strange malfunctions in the tests of
410 -- whether units belong to the main source. This is really a
411 -- bug, but too hard to fix for a marginal capability ???
413 -- The proper fix is to completely redo -gnatD processing so
414 -- that the tree is not messed with, and instead a separate
415 -- table is built on the side for debug information generation.
417 if List_Representation_Info
/= 0 then
419 ("-gnatD not permitted since -gnatR given previously");
422 -- Scan optional integer line limit value
424 if Nat_Present
(Switch_Chars
, Max
, Ptr
) then
425 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Sprint_Line_Limit
, 'D');
426 Sprint_Line_Limit
:= Nat
'Max (Sprint_Line_Limit
, 40);
429 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
430 -- generation in the ali file) since otherwise this generation
431 -- gets confused by the "wrong" Sloc values put in the tree.
433 Debug_Generated_Code
:= True;
434 Xref_Active
:= False;
435 Set_Debug_Flag
('g');
437 -- -gnate? (extended switches)
442 -- The -gnate? switches are all double character switches
443 -- so we must always have a character after the e.
446 Bad_Switch
("-gnate");
449 case Switch_Chars
(Ptr
) is
451 -- -gnatea (initial delimiter of explicit switches)
453 -- This is an internal switch
455 -- All switches that come before -gnatea have been added by
456 -- the GCC driver and are not stored in the ALI file.
457 -- See also -gnatez below.
460 Store_Switch
:= False;
461 Enable_Switch_Storing
;
464 -- -gnateA (aliasing checks on parameters)
468 Check_Aliasing_Of_Parameters
:= True;
470 -- -gnatec (configuration pragmas)
473 Store_Switch
:= False;
476 -- There may be an equal sign between -gnatec and
477 -- the path name of the config file.
479 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
484 Bad_Switch
("-gnatec");
488 Config_File_Name
: constant String_Access
:=
490 (Switch_Chars (Ptr .. Max));
493 if Config_File_Names = null then
495 new String_List'(1 => Config_File_Name
);
499 New_Names
: constant String_List_Access
:=
502 Config_File_Names
'Length + 1);
505 for Index
in Config_File_Names
'Range loop
507 Config_File_Names
(Index
);
508 Config_File_Names
(Index
) := null;
511 New_Names
(New_Names
'Last) := Config_File_Name
;
512 Free
(Config_File_Names
);
513 Config_File_Names
:= New_Names
;
520 -- -gnateC switch (CodePeer SCIL generation)
522 -- Not enabled for now, keep it for later???
523 -- use -gnatd.I only for now
527 -- Generate_SCIL := True;
529 -- -gnated switch (disable atomic synchronization)
532 Suppress_Options
.Suppress
(Atomic_Synchronization
) :=
535 -- -gnateD switch (preprocessing symbol definition)
538 Store_Switch
:= False;
542 Bad_Switch
("-gnateD");
545 Add_Symbol_Definition
(Switch_Chars
(Ptr
.. Max
));
549 Store_Compilation_Switch
550 ("-gnateD" & Switch_Chars
(Ptr
.. Max
));
553 -- -gnateE (extra exception information)
556 Exception_Extra_Info
:= True;
559 -- -gnatef (full source path for brief error messages)
562 Store_Switch
:= False;
564 Full_Path_Name_For_Brief_Errors
:= True;
566 -- -gnateF (Check_Float_Overflow)
570 Check_Float_Overflow
:= True;
572 -- -gnateG (save preprocessor output)
575 Generate_Processed_File
:= True;
578 -- -gnatei (max number of instantiations)
583 (Switch_Chars
, Max
, Ptr
, Maximum_Instantiations
, C
);
585 -- -gnateI (index of unit in multi-unit source)
589 Scan_Pos
(Switch_Chars
, Max
, Ptr
, Multiple_Unit_Index
, C
);
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 (generate SCO information)
665 -- Include Source Coverage Obligation information in ALI
666 -- files for the benefit of source coverage analysis tools
670 Generate_SCO := True;
671 Generate_SCO_Instance_Table := True;
674 -- -gnatet (write target dependent information)
677 if not First_Switch then
679 ("-gnatet must not be combined with other switches");
686 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
687 Bad_Switch ("-gnatet");
689 Target_Dependent_Info_Write_Name :=
690 new String'(Switch_Chars
(Ptr
+ 1 .. Max
));
695 -- -gnateT (read target dependent information)
698 if not First_Switch
then
700 ("-gnateT must not be combined with other switches");
707 if Ptr
>= Max
or else Switch_Chars
(Ptr
) /= '=' then
708 Bad_Switch
("-gnateT");
710 -- This parameter was stored by Set_Targ earlier
713 (Target_Dependent_Info_Read_Name
.all =
714 Switch_Chars
(Ptr
+ 1 .. Max
));
720 -- -gnateu (unrecognized y,V,w switches)
724 Ignore_Unrecognized_VWY_Switches
:= True;
726 -- -gnateV (validity checks on parameters)
730 Check_Validity_Of_Parameters
:= True;
732 -- -gnateY (ignore Style_Checks pragmas)
735 Ignore_Style_Checks_Pragmas
:= True;
738 -- -gnatez (final delimiter of explicit switches)
740 -- This is an internal switch
742 -- All switches that come after -gnatez have been added by
743 -- the GCC driver and are not stored in the ALI file. See
744 -- also -gnatea above.
747 Store_Switch
:= False;
748 Disable_Switch_Storing
;
751 -- All other -gnate? switches are unassigned
754 Bad_Switch
("-gnate" & Switch_Chars
(Ptr
.. Max
));
757 -- -gnatE (dynamic elaboration checks)
761 Dynamic_Elaboration_Checks
:= True;
763 -- -gnatf (full error messages)
767 All_Errors_Mode
:= True;
769 -- -gnatF (overflow of predefined float types)
773 External_Name_Exp_Casing
:= Uppercase
;
774 External_Name_Imp_Casing
:= Uppercase
;
776 -- -gnatg (GNAT implementation mode)
781 Identifier_Character_Set
:= 'n';
782 System_Extend_Unit
:= Empty
;
783 Warning_Mode
:= Treat_As_Error
;
784 Style_Check_Main
:= True;
786 -- Set Ada 2012 mode explicitly. We don't want to rely on the
787 -- implicit setting here, since for example, we want
788 -- Preelaborate_05 treated as Preelaborate
790 Ada_Version
:= Ada_2012
;
791 Ada_Version_Explicit
:= Ada_2012
;
792 Ada_Version_Pragma
:= Empty
;
794 -- Set default warnings and style checks for -gnatg
796 Set_GNAT_Mode_Warnings
;
797 Set_GNAT_Style_Check_Options
;
799 -- -gnatG (output generated code)
803 Print_Generated_Code
:= True;
805 -- Scan optional integer line limit value
807 if Nat_Present
(Switch_Chars
, Max
, Ptr
) then
808 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Sprint_Line_Limit
, 'G');
809 Sprint_Line_Limit
:= Nat
'Max (Sprint_Line_Limit
, 40);
812 -- -gnath (help information)
816 Usage_Requested
:= True;
818 -- -gnati (character set)
822 Bad_Switch
("-gnati");
826 C
:= Switch_Chars
(Ptr
);
836 Identifier_Character_Set
:= C
;
840 Bad_Switch
("-gnati" & Switch_Chars
(Ptr
.. Max
));
843 -- -gnatI (ignore representation clauses)
847 Ignore_Rep_Clauses
:= True;
849 -- -gnatj (messages in limited length lines)
853 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Error_Msg_Line_Length
, C
);
855 -- -gnatk (limit file name length)
860 (Switch_Chars
, Max
, Ptr
, Maximum_File_Name_Length
, C
);
862 -- -gnatl (output full source)
868 -- There may be an equal sign between -gnatl and a file name
870 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
872 Osint
.Fail
("file name for -gnatl= is null");
874 Opt
.Full_List_File_Name
:=
875 new String'(Switch_Chars (Ptr + 1 .. Max));
880 -- -gnatL (corresponding source text)
884 Dump_Source_Text := True;
886 -- -gnatm (max number or errors/warnings)
890 Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Messages, C);
892 -- -gnatn (enable pragma Inline)
896 Inline_Active := True;
898 -- There may be a digit (1 or 2) appended to the switch
901 C := Switch_Chars (Ptr);
903 if C in '1' .. '2' then
905 Inline_Level := Character'Pos (C) - Character'Pos ('0');
909 -- -gnatN (obsolescent)
913 Inline_Active := True;
914 Front_End_Inlining := True;
916 -- -gnato (overflow checks)
920 Suppress_Options.Suppress (Overflow_Check) := False;
922 -- Case of no digits after the -gnato
924 if Ptr > Max or else Switch_Chars (Ptr) not in '1' .. '3' then
925 Suppress_Options.Overflow_Mode_General := Strict;
926 Suppress_Options.Overflow_Mode_Assertions := Strict;
928 -- At least one digit after the -gnato
931 -- Handle first digit after -gnato
933 Suppress_Options.Overflow_Mode_General :=
934 Get_Overflow_Mode (Switch_Chars (Ptr));
937 -- Only one digit after -gnato, set assertions mode to
938 -- be the same as general mode.
941 or else Switch_Chars (Ptr) not in '1' .. '3'
943 Suppress_Options.Overflow_Mode_Assertions :=
944 Suppress_Options.Overflow_Mode_General;
946 -- Process second digit after -gnato
949 Suppress_Options.Overflow_Mode_Assertions :=
950 Get_Overflow_Mode (Switch_Chars (Ptr));
955 -- -gnatO (specify name of the object file)
957 -- This is an internal switch
960 Store_Switch := False;
962 Output_File_Name_Present := True;
964 -- -gnatp (suppress all checks)
969 -- Skip processing if cancelled by subsequent -gnat-p
971 if Switch_Subsequently_Cancelled ("p", Args, Arg_Rank) then
972 Store_Switch := False;
975 -- Set all specific options as well as All_Checks in the
976 -- Suppress_Options array, excluding Elaboration_Check,
977 -- since this is treated specially because we do not want
978 -- -gnatp to disable static elaboration processing. Also
979 -- exclude Atomic_Synchronization, since this is not a real
982 for J in Suppress_Options.Suppress'Range loop
983 if J /= Elaboration_Check
985 J /= Atomic_Synchronization
987 Suppress_Options.Suppress (J) := True;
991 Validity_Checks_On := False;
992 Opt.Suppress_Checks := True;
995 -- -gnatP (periodic poll)
999 Polling_Required := True;
1001 -- -gnatq (don't quit)
1005 Try_Semantics := True;
1007 -- -gnatQ (always write ALI file)
1011 Force_ALI_Tree_File := True;
1012 Try_Semantics := True;
1014 -- -gnatr (restrictions as warnings)
1018 Treat_Restrictions_As_Warnings := True;
1020 -- -gnatR (list rep. info)
1024 -- Not allowed if previous -gnatD given. See more extensive
1025 -- comments in the 'D
' section for the inverse test.
1027 if Debug_Generated_Code then
1029 ("-gnatR not permitted since -gnatD given previously");
1032 -- Not allowed if previous -gnatc was given, since we must
1033 -- call the code generator to determine rep information.
1035 if Operating_Mode = Check_Semantics then
1037 ("-gnatR not permitted since -gnatc given previously");
1040 -- Set to annotate rep info, and set default -gnatR mode
1042 Back_Annotate_Rep_Info := True;
1043 List_Representation_Info := 1;
1045 -- Scan possible parameter
1048 while Ptr <= Max loop
1049 C := Switch_Chars (Ptr);
1051 if C in '1' .. '3' then
1052 List_Representation_Info :=
1053 Character'Pos (C) - Character'Pos ('0');
1055 elsif Switch_Chars (Ptr) = 's
' then
1056 List_Representation_Info_To_File := True;
1058 elsif Switch_Chars (Ptr) = 'm
' then
1059 List_Representation_Info_Mechanisms := True;
1062 Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max));
1068 -- -gnats (syntax check only)
1071 if not First_Switch then
1073 ("-gnats must be first if combined with other switches");
1077 Operating_Mode := Check_Syntax;
1079 -- -gnatS (print package Standard)
1082 Print_Standard := True;
1085 -- -gnatt (output tree)
1089 Tree_Output := True;
1090 Back_Annotate_Rep_Info := True;
1092 -- -gnatT (change start of internal table sizes)
1096 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C);
1098 -- -gnatu (list units for compilation)
1104 -- -gnatU (unique tags)
1108 Unique_Error_Tag := True;
1110 -- -gnatv (verbose mode)
1114 Verbose_Mode := True;
1116 -- -gnatV (validity checks)
1119 Store_Switch := False;
1123 Bad_Switch ("-gnatV");
1130 Set_Validity_Check_Options
1131 (Switch_Chars (Ptr .. Max), OK, Ptr);
1134 Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max));
1137 for Index in First_Char + 1 .. Max loop
1138 Store_Compilation_Switch
1139 ("-gnatV" & Switch_Chars (Index));
1146 -- -gnatw (warning modes)
1149 Store_Switch := False;
1153 Bad_Switch ("-gnatw");
1156 while Ptr <= Max loop
1157 C := Switch_Chars (Ptr);
1159 -- Case of dot switch
1161 if C = '.' and then Ptr < Max then
1163 C := Switch_Chars (Ptr);
1165 if Set_Dot_Warning_Switch (C) then
1166 Store_Compilation_Switch ("-gnatw." & C);
1168 Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max));
1171 -- Normal case, no dot
1174 if Set_Warning_Switch (C) then
1175 Store_Compilation_Switch ("-gnatw" & C);
1177 Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max));
1186 -- -gnatW (wide character encoding method)
1192 Bad_Switch ("-gnatW");
1196 Wide_Character_Encoding_Method :=
1197 Get_WC_Encoding_Method (Switch_Chars (Ptr));
1199 when Constraint_Error =>
1200 Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max));
1203 Wide_Character_Encoding_Method_Specified := True;
1205 Upper_Half_Encoding :=
1206 Wide_Character_Encoding_Method in
1207 WC_Upper_Half_Encoding_Method;
1211 -- -gnatx (suppress cross-ref information)
1215 Xref_Active := False;
1217 -- -gnatX (language extensions)
1221 Extensions_Allowed := True;
1222 Ada_Version := Ada_Version_Type'Last;
1223 Ada_Version_Explicit := Ada_Version_Type'Last;
1224 Ada_Version_Pragma := Empty;
1226 -- -gnaty (style checks)
1230 Style_Check_Main := True;
1233 Set_Default_Style_Check_Options;
1236 Store_Switch := False;
1242 Set_Style_Check_Options
1243 (Switch_Chars (Ptr .. Max), OK, Ptr);
1247 ("bad -gnaty switch (" &
1248 Style_Msg_Buf (1 .. Style_Msg_Len) & ')');
1251 Ptr := First_Char + 1;
1252 while Ptr <= Max loop
1253 if Switch_Chars (Ptr) = 'M
' then
1258 or else Switch_Chars (Ptr) not in '0' .. '9';
1261 Store_Compilation_Switch
1262 ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1));
1265 Store_Compilation_Switch
1266 ("-gnaty" & Switch_Chars (Ptr));
1273 -- -gnatz (stub generation)
1277 -- -gnatz must be the first and only switch in Switch_Chars,
1278 -- and is a two-letter switch.
1280 if Ptr /= Switch_Chars'First + 5
1281 or else (Max - Ptr + 1) > 2
1284 ("-gnatz* may not be combined with other switches");
1288 Bad_Switch ("-gnatz");
1293 -- Only one occurrence of -gnat* is permitted
1295 if Distribution_Stub_Mode = No_Stubs then
1296 case Switch_Chars (Ptr) is
1298 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
1301 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
1304 Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max));
1310 Osint.Fail ("only one -gnatz* switch allowed");
1313 -- -gnatZ (obsolescent)
1318 ("-gnatZ is no longer supported: consider using --RTS=zcx");
1320 -- Note on language version switches: whenever a new language
1321 -- version switch is added, Switch.M.Normalize_Compiler_Switches
1328 Bad_Switch ("-gnat8");
1333 if Switch_Chars (Ptr) /= '3' then
1334 Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max));
1337 Ada_Version := Ada_83;
1338 Ada_Version_Explicit := Ada_83;
1339 Ada_Version_Pragma := Empty;
1346 Bad_Switch ("-gnat9");
1351 if Switch_Chars (Ptr) /= '5' then
1352 Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max));
1355 Ada_Version := Ada_95;
1356 Ada_Version_Explicit := Ada_95;
1357 Ada_Version_Pragma := Empty;
1364 Bad_Switch ("-gnat0");
1369 if Switch_Chars (Ptr) /= '5' then
1370 Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max));
1373 Ada_Version := Ada_2005;
1374 Ada_Version_Explicit := Ada_2005;
1375 Ada_Version_Pragma := Empty;
1382 Bad_Switch ("-gnat1");
1387 if Switch_Chars (Ptr) /= '2' then
1388 Bad_Switch ("-gnat1" & Switch_Chars (Ptr .. Max));
1391 Ada_Version := Ada_2012;
1392 Ada_Version_Explicit := Ada_2012;
1393 Ada_Version_Pragma := Empty;
1396 -- -gnat2005 and -gnat2012
1399 if Ptr > Max - 3 then
1400 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1402 elsif Switch_Chars (Ptr .. Ptr + 3) = "2005" then
1403 Ada_Version := Ada_2005;
1405 elsif Switch_Chars (Ptr .. Ptr + 3) = "2012" then
1406 Ada_Version := Ada_2012;
1409 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Ptr + 3));
1412 Ada_Version_Explicit := Ada_Version;
1413 Ada_Version_Pragma := Empty;
1416 -- Switch cancellation, currently only -gnat-p is allowed.
1417 -- All we do here is the error checking, since the actual
1418 -- processing for switch cancellation is done by calls to
1419 -- Switch_Subsequently_Cancelled at the appropriate point.
1423 -- Simple ignore -gnat-p
1425 if Switch_Chars = "-gnat-p" then
1428 -- Any other occurrence of minus is ignored. This is for
1429 -- maximum compatibility with previous version which ignored
1430 -- all occurrences of minus.
1433 Store_Switch := False;
1437 -- We ignore '/' in switches, this is historical, still needed???
1440 Store_Switch := False;
1442 -- Anything else is an error (illegal switch character)
1445 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1448 if Store_Switch then
1449 Store_Compilation_Switch
1450 ("-gnat" & Switch_Chars (First_Char .. Ptr - 1));
1453 First_Switch := False;
1456 end Scan_Front_End_Switches;
1458 -----------------------------------
1459 -- Switch_Subsequently_Cancelled --
1460 -----------------------------------
1462 function Switch_Subsequently_Cancelled
1465 Arg_Rank : Positive) return Boolean
1468 -- Loop through arguments following the current one
1470 for Arg in Arg_Rank + 1 .. Args'Last loop
1471 if Args (Arg).all = "-gnat-" & C then
1476 -- No match found, not cancelled
1479 end Switch_Subsequently_Cancelled;