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 Validsw
; use Validsw
;
35 with Stylesw
; use Stylesw
;
36 with Ttypes
; use Ttypes
;
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 -- Scan optional integer line limit value
399 if Nat_Present
(Switch_Chars
, Max
, Ptr
) then
400 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Sprint_Line_Limit
, 'D');
401 Sprint_Line_Limit
:= Nat
'Max (Sprint_Line_Limit
, 40);
404 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
405 -- generation in the ali file) since otherwise this generation
406 -- gets confused by the "wrong" Sloc values put in the tree.
408 Debug_Generated_Code
:= True;
409 Xref_Active
:= False;
410 Set_Debug_Flag
('g');
412 -- -gnate? (extended switches)
417 -- The -gnate? switches are all double character switches
418 -- so we must always have a character after the e.
421 Bad_Switch
("-gnate");
424 case Switch_Chars
(Ptr
) is
426 -- -gnatea (initial delimiter of explicit switches)
428 -- This is an internal switch
430 -- All switches that come before -gnatea have been added by
431 -- the GCC driver and are not stored in the ALI file.
432 -- See also -gnatez below.
435 Store_Switch
:= False;
436 Enable_Switch_Storing
;
439 -- -gnateA (aliasing checks on parameters)
443 Check_Aliasing_Of_Parameters
:= True;
445 -- -gnatec (configuration pragmas)
448 Store_Switch
:= False;
451 -- There may be an equal sign between -gnatec and
452 -- the path name of the config file.
454 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
459 Bad_Switch
("-gnatec");
463 Config_File_Name
: constant String_Access
:=
465 (Switch_Chars (Ptr .. Max));
468 if Config_File_Names = null then
470 new String_List'(1 => Config_File_Name
);
474 New_Names
: constant String_List_Access
:=
477 Config_File_Names
'Length + 1);
480 for Index
in Config_File_Names
'Range loop
482 Config_File_Names
(Index
);
483 Config_File_Names
(Index
) := null;
486 New_Names
(New_Names
'Last) := Config_File_Name
;
487 Free
(Config_File_Names
);
488 Config_File_Names
:= New_Names
;
495 -- -gnateC switch (CodePeer SCIL generation)
497 -- Not enabled for now, keep it for later???
498 -- use -gnatd.I only for now
502 -- Generate_SCIL := True;
504 -- -gnated switch (disable atomic synchronization)
507 Suppress_Options
.Suppress
(Atomic_Synchronization
) :=
510 -- -gnateD switch (preprocessing symbol definition)
513 Store_Switch
:= False;
517 Bad_Switch
("-gnateD");
520 Add_Symbol_Definition
(Switch_Chars
(Ptr
.. Max
));
524 Store_Compilation_Switch
525 ("-gnateD" & Switch_Chars
(Ptr
.. Max
));
528 -- -gnateE (extra exception information)
531 Exception_Extra_Info
:= True;
534 -- -gnatef (full source path for brief error messages)
537 Store_Switch
:= False;
539 Full_Path_Name_For_Brief_Errors
:= True;
541 -- -gnateF (Check_Float_Overflow)
545 Check_Float_Overflow
:= True;
547 -- -gnateG (save preprocessor output)
550 Generate_Processed_File
:= True;
553 -- -gnatei (max number of instantiations)
558 (Switch_Chars
, Max
, Ptr
, Maximum_Instantiations
, C
);
560 -- -gnateI (index of unit in multi-unit source)
564 Scan_Pos
(Switch_Chars
, Max
, Ptr
, Multiple_Unit_Index
, C
);
566 -- -gnatem (mapping file)
569 Store_Switch
:= False;
572 -- There may be an equal sign between -gnatem and
573 -- the path name of the mapping file.
575 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
580 Bad_Switch
("-gnatem");
584 new String'(Switch_Chars (Ptr .. Max));
587 -- -gnateO= (object path file)
589 -- This is an internal switch
592 Store_Switch := False;
597 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
598 Bad_Switch ("-gnateO");
600 Object_Path_File_Name :=
601 new String'(Switch_Chars
(Ptr
+ 1 .. Max
));
606 -- -gnatep (preprocessing data file)
609 Store_Switch
:= False;
612 -- There may be an equal sign between -gnatep and
613 -- the path name of the mapping file.
615 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
620 Bad_Switch
("-gnatep");
623 Preprocessing_Data_File
:=
624 new String'(Switch_Chars (Ptr .. Max));
626 -- Store the switch, normalizing to -gnatep=
628 Store_Compilation_Switch
629 ("-gnatep=" & Preprocessing_Data_File.all);
633 -- -gnateP (Treat pragma Pure/Preelaborate errs as warnings)
636 Treat_Categorization_Errors_As_Warnings := True;
638 -- -gnateS (generate SCO information)
640 -- Include Source Coverage Obligation information in ALI
641 -- files for the benefit of source coverage analysis tools
645 Generate_SCO := True;
646 Generate_SCO_Instance_Table := True;
649 -- -gnatet (write target dependent information)
652 if not First_Switch then
654 ("-gnatet must not be combined with other switches");
661 if Ptr >= Max or else Switch_Chars (Ptr) /= '=' then
662 Bad_Switch ("-gnatet");
664 Target_Dependent_Info_Write_Name :=
665 new String'(Switch_Chars
(Ptr
+ 1 .. Max
));
670 -- -gnateT (read target dependent information)
673 if not First_Switch
then
675 ("-gnateT must not be combined with other switches");
682 if Ptr
>= Max
or else Switch_Chars
(Ptr
) /= '=' then
683 Bad_Switch
("-gnateT");
685 -- This parameter was stored by Set_Targ earlier
688 (Target_Dependent_Info_Read_Name
.all =
689 Switch_Chars
(Ptr
+ 1 .. Max
));
695 -- -gnateV (validity checks on parameters)
699 Check_Validity_Of_Parameters
:= True;
701 -- -gnateY (ignore Style_Checks pragmas)
704 Ignore_Style_Checks_Pragmas
:= True;
707 -- -gnatez (final delimiter of explicit switches)
709 -- This is an internal switch
711 -- All switches that come after -gnatez have been added by
712 -- the GCC driver and are not stored in the ALI file. See
713 -- also -gnatea above.
716 Store_Switch
:= False;
717 Disable_Switch_Storing
;
720 -- All other -gnate? switches are unassigned
723 Bad_Switch
("-gnate" & Switch_Chars
(Ptr
.. Max
));
726 -- -gnatE (dynamic elaboration checks)
730 Dynamic_Elaboration_Checks
:= True;
732 -- -gnatf (full error messages)
736 All_Errors_Mode
:= True;
738 -- -gnatF (overflow of predefined float types)
742 External_Name_Exp_Casing
:= Uppercase
;
743 External_Name_Imp_Casing
:= Uppercase
;
745 -- -gnatg (GNAT implementation mode)
750 Identifier_Character_Set
:= 'n';
751 System_Extend_Unit
:= Empty
;
752 Warning_Mode
:= Treat_As_Error
;
753 Style_Check_Main
:= True;
755 -- Set Ada 2012 mode explicitly. We don't want to rely on the
756 -- implicit setting here, since for example, we want
757 -- Preelaborate_05 treated as Preelaborate
759 Ada_Version
:= Ada_2012
;
760 Ada_Version_Explicit
:= Ada_Version
;
762 -- Set default warnings and style checks for -gnatg
764 Set_GNAT_Mode_Warnings
;
765 Set_GNAT_Style_Check_Options
;
767 -- -gnatG (output generated code)
771 Print_Generated_Code
:= True;
773 -- Scan optional integer line limit value
775 if Nat_Present
(Switch_Chars
, Max
, Ptr
) then
776 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Sprint_Line_Limit
, 'G');
777 Sprint_Line_Limit
:= Nat
'Max (Sprint_Line_Limit
, 40);
780 -- -gnath (help information)
784 Usage_Requested
:= True;
786 -- -gnati (character set)
790 Bad_Switch
("-gnati");
794 C
:= Switch_Chars
(Ptr
);
804 Identifier_Character_Set
:= C
;
808 Bad_Switch
("-gnati" & Switch_Chars
(Ptr
.. Max
));
811 -- -gnatI (ignore representation clauses)
815 Ignore_Rep_Clauses
:= True;
817 -- -gnatj (messages in limited length lines)
821 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Error_Msg_Line_Length
, C
);
823 -- -gnatk (limit file name length)
828 (Switch_Chars
, Max
, Ptr
, Maximum_File_Name_Length
, C
);
830 -- -gnatl (output full source)
836 -- There may be an equal sign between -gnatl and a file name
838 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
840 Osint
.Fail
("file name for -gnatl= is null");
842 Opt
.Full_List_File_Name
:=
843 new String'(Switch_Chars (Ptr + 1 .. Max));
848 -- -gnatL (corresponding source text)
852 Dump_Source_Text := True;
854 -- -gnatm (max number or errors/warnings)
858 Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Messages, C);
860 -- -gnatn (enable pragma Inline)
864 Inline_Active := True;
866 -- There may be a digit (1 or 2) appended to the switch
869 C := Switch_Chars (Ptr);
871 if C in '1' .. '2' then
873 Inline_Level := Character'Pos (C) - Character'Pos ('0');
877 -- -gnatN (obsolescent)
881 Inline_Active := True;
882 Front_End_Inlining := True;
884 -- -gnato (overflow checks)
888 Suppress_Options.Suppress (Overflow_Check) := False;
890 -- Case of no digits after the -gnato
892 if Ptr > Max or else Switch_Chars (Ptr) not in '1' .. '3' then
893 Suppress_Options.Overflow_Mode_General := Strict;
894 Suppress_Options.Overflow_Mode_Assertions := Strict;
896 -- At least one digit after the -gnato
899 -- Handle first digit after -gnato
901 Suppress_Options.Overflow_Mode_General :=
902 Get_Overflow_Mode (Switch_Chars (Ptr));
905 -- Only one digit after -gnato, set assertions mode to
906 -- be the same as general mode.
909 or else Switch_Chars (Ptr) not in '1' .. '3'
911 Suppress_Options.Overflow_Mode_Assertions :=
912 Suppress_Options.Overflow_Mode_General;
914 -- Process second digit after -gnato
917 Suppress_Options.Overflow_Mode_Assertions :=
918 Get_Overflow_Mode (Switch_Chars (Ptr));
923 -- -gnatO (specify name of the object file)
925 -- This is an internal switch
928 Store_Switch := False;
930 Output_File_Name_Present := True;
932 -- -gnatp (suppress all checks)
937 -- Skip processing if cancelled by subsequent -gnat-p
939 if Switch_Subsequently_Cancelled ("p", Args, Arg_Rank) then
940 Store_Switch := False;
943 -- Set all specific options as well as All_Checks in the
944 -- Suppress_Options array, excluding Elaboration_Check,
945 -- since this is treated specially because we do not want
946 -- -gnatp to disable static elaboration processing. Also
947 -- exclude Atomic_Synchronization, since this is not a real
950 for J in Suppress_Options.Suppress'Range loop
951 if J /= Elaboration_Check
953 J /= Atomic_Synchronization
955 Suppress_Options.Suppress (J) := True;
959 Validity_Checks_On := False;
960 Opt.Suppress_Checks := True;
963 -- -gnatP (periodic poll)
967 Polling_Required := True;
969 -- -gnatq (don't quit)
973 Try_Semantics := True;
975 -- -gnatQ (always write ALI file)
979 Force_ALI_Tree_File := True;
980 Try_Semantics := True;
982 -- -gnatr (restrictions as warnings)
986 Treat_Restrictions_As_Warnings := True;
988 -- -gnatR (list rep. info)
991 Back_Annotate_Rep_Info := True;
992 List_Representation_Info := 1;
995 while Ptr <= Max loop
996 C := Switch_Chars (Ptr);
998 if C in '1' .. '3' then
999 List_Representation_Info :=
1000 Character'Pos (C) - Character'Pos ('0');
1002 elsif Switch_Chars (Ptr) = 's
' then
1003 List_Representation_Info_To_File := True;
1005 elsif Switch_Chars (Ptr) = 'm
' then
1006 List_Representation_Info_Mechanisms := True;
1009 Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max));
1015 -- -gnats (syntax check only)
1018 if not First_Switch then
1020 ("-gnats must be first if combined with other switches");
1024 Operating_Mode := Check_Syntax;
1026 -- -gnatS (print package Standard)
1029 Print_Standard := True;
1032 -- -gnatt (output tree)
1036 Tree_Output := True;
1037 Back_Annotate_Rep_Info := True;
1039 -- -gnatT (change start of internal table sizes)
1043 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C);
1045 -- -gnatu (list units for compilation)
1051 -- -gnatU (unique tags)
1055 Unique_Error_Tag := True;
1057 -- -gnatv (verbose mode)
1061 Verbose_Mode := True;
1063 -- -gnatV (validity checks)
1066 Store_Switch := False;
1070 Bad_Switch ("-gnatV");
1077 Set_Validity_Check_Options
1078 (Switch_Chars (Ptr .. Max), OK, Ptr);
1081 Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max));
1084 for Index in First_Char + 1 .. Max loop
1085 Store_Compilation_Switch
1086 ("-gnatV" & Switch_Chars (Index));
1093 -- -gnatw (warning modes)
1096 Store_Switch := False;
1100 Bad_Switch ("-gnatw");
1103 while Ptr <= Max loop
1104 C := Switch_Chars (Ptr);
1106 -- Case of dot switch
1108 if C = '.' and then Ptr < Max then
1110 C := Switch_Chars (Ptr);
1112 if Set_Dot_Warning_Switch (C) then
1113 Store_Compilation_Switch ("-gnatw." & C);
1115 Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max));
1118 -- Normal case, no dot
1121 if Set_Warning_Switch (C) then
1122 Store_Compilation_Switch ("-gnatw" & C);
1124 Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max));
1133 -- -gnatW (wide character encoding method)
1139 Bad_Switch ("-gnatW");
1143 Wide_Character_Encoding_Method :=
1144 Get_WC_Encoding_Method (Switch_Chars (Ptr));
1146 when Constraint_Error =>
1147 Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max));
1150 Wide_Character_Encoding_Method_Specified := True;
1152 Upper_Half_Encoding :=
1153 Wide_Character_Encoding_Method in
1154 WC_Upper_Half_Encoding_Method;
1158 -- -gnatx (suppress cross-ref information)
1162 Xref_Active := False;
1164 -- -gnatX (language extensions)
1168 Extensions_Allowed := True;
1169 Ada_Version := Ada_Version_Type'Last;
1170 Ada_Version_Explicit := Ada_Version_Type'Last;
1172 -- -gnaty (style checks)
1176 Style_Check_Main := True;
1179 Set_Default_Style_Check_Options;
1182 Store_Switch := False;
1188 Set_Style_Check_Options
1189 (Switch_Chars (Ptr .. Max), OK, Ptr);
1193 ("bad -gnaty switch (" &
1194 Style_Msg_Buf (1 .. Style_Msg_Len) & ')');
1197 Ptr := First_Char + 1;
1198 while Ptr <= Max loop
1199 if Switch_Chars (Ptr) = 'M
' then
1204 or else Switch_Chars (Ptr) not in '0' .. '9';
1207 Store_Compilation_Switch
1208 ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1));
1211 Store_Compilation_Switch
1212 ("-gnaty" & Switch_Chars (Ptr));
1219 -- -gnatz (stub generation)
1223 -- -gnatz must be the first and only switch in Switch_Chars,
1224 -- and is a two-letter switch.
1226 if Ptr /= Switch_Chars'First + 5
1227 or else (Max - Ptr + 1) > 2
1230 ("-gnatz* may not be combined with other switches");
1234 Bad_Switch ("-gnatz");
1239 -- Only one occurrence of -gnat* is permitted
1241 if Distribution_Stub_Mode = No_Stubs then
1242 case Switch_Chars (Ptr) is
1244 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
1247 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
1250 Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max));
1256 Osint.Fail ("only one -gnatz* switch allowed");
1259 -- -gnatZ (obsolescent)
1264 ("-gnatZ is no longer supported: consider using --RTS=zcx");
1266 -- Note on language version switches: whenever a new language
1267 -- version switch is added, Switch.M.Normalize_Compiler_Switches
1274 Bad_Switch ("-gnat8");
1279 if Switch_Chars (Ptr) /= '3' then
1280 Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max));
1283 Ada_Version := Ada_83;
1284 Ada_Version_Explicit := Ada_Version;
1291 Bad_Switch ("-gnat9");
1296 if Switch_Chars (Ptr) /= '5' then
1297 Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max));
1300 Ada_Version := Ada_95;
1301 Ada_Version_Explicit := Ada_Version;
1308 Bad_Switch ("-gnat0");
1313 if Switch_Chars (Ptr) /= '5' then
1314 Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max));
1317 Ada_Version := Ada_2005;
1318 Ada_Version_Explicit := Ada_Version;
1325 Bad_Switch ("-gnat1");
1330 if Switch_Chars (Ptr) /= '2' then
1331 Bad_Switch ("-gnat1" & Switch_Chars (Ptr .. Max));
1334 Ada_Version := Ada_2012;
1335 Ada_Version_Explicit := Ada_Version;
1338 -- -gnat2005 and -gnat2012
1341 if Ptr > Max - 3 then
1342 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1344 elsif Switch_Chars (Ptr .. Ptr + 3) = "2005" then
1345 Ada_Version := Ada_2005;
1347 elsif Switch_Chars (Ptr .. Ptr + 3) = "2012" then
1348 Ada_Version := Ada_2012;
1351 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Ptr + 3));
1354 Ada_Version_Explicit := Ada_Version;
1357 -- Switch cancellation, currently only -gnat-p is allowed.
1358 -- All we do here is the error checking, since the actual
1359 -- processing for switch cancellation is done by calls to
1360 -- Switch_Subsequently_Cancelled at the appropriate point.
1364 -- Simple ignore -gnat-p
1366 if Switch_Chars = "-gnat-p" then
1369 -- Any other occurrence of minus is ignored. This is for
1370 -- maximum compatibility with previous version which ignored
1371 -- all occurrences of minus.
1374 Store_Switch := False;
1378 -- We ignore '/' in switches, this is historical, still needed???
1381 Store_Switch := False;
1383 -- Anything else is an error (illegal switch character)
1386 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1389 if Store_Switch then
1390 Store_Compilation_Switch
1391 ("-gnat" & Switch_Chars (First_Char .. Ptr - 1));
1394 First_Switch := False;
1397 end Scan_Front_End_Switches;
1399 -----------------------------------
1400 -- Switch_Subsequently_Cancelled --
1401 -----------------------------------
1403 function Switch_Subsequently_Cancelled
1406 Arg_Rank : Positive) return Boolean
1409 -- Loop through arguments following the current one
1411 for Arg in Arg_Rank + 1 .. Args'Last loop
1412 if Args (Arg).all = "-gnat-" & C then
1417 -- No match found, not cancelled
1420 end Switch_Subsequently_Cancelled;