1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2001-2010, 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 with Debug
; use Debug
;
28 with Osint
; use Osint
;
30 with Prepcomp
; use Prepcomp
;
31 with Validsw
; use Validsw
;
32 with Sem_Warn
; use Sem_Warn
;
33 with Stylesw
; use Stylesw
;
36 with System
.WCh_Con
; use System
.WCh_Con
;
38 package body Switch
.C
is
40 RTS_Specified
: String_Access
:= null;
41 -- Used to detect multiple use of --RTS= flag
43 function Switch_Subsequently_Cancelled
46 Arg_Rank
: Positive) return Boolean;
47 -- This function is called from Scan_Front_End_Switches. It determines if
48 -- the switch currently being scanned is followed by a switch of the form
49 -- "-gnat-" & C, where C is the argument. If so, then True is returned,
50 -- and Scan_Front_End_Switches will cancel the effect of the switch. If
51 -- no such switch is found, False is returned.
53 -----------------------------
54 -- Scan_Front_End_Switches --
55 -----------------------------
57 procedure Scan_Front_End_Switches
58 (Switch_Chars
: String;
62 First_Switch
: Boolean := True;
63 -- False for all but first switch
65 Max
: constant Natural := Switch_Chars
'Last;
70 Store_Switch
: Boolean;
71 -- For -gnatxx switches, the normal processing, signalled by this flag
72 -- being set to True, is to store the switch on exit from the case
73 -- statement, the switch stored is -gnat followed by the characters
74 -- from First_Char to Ptr-1. For cases like -gnaty, where the switch
75 -- is stored in separate pieces, this flag is set to False, and the
76 -- appropriate calls to Store_Compilation_Switch are made from within
79 First_Char
: Positive;
80 -- Marks start of switch to be stored
83 Ptr
:= Switch_Chars
'First;
85 -- Skip past the initial character (must be the switch character)
93 -- Handle switches that do not start with -gnat
96 or else Switch_Chars
(Ptr
.. Ptr
+ 3) /= "gnat"
98 -- There are two front-end switches that do not start with -gnat:
101 if Switch_Chars
(Ptr
) = 'I' then
103 -- Set flag Search_Directory_Present if switch is "-I" only:
104 -- the directory will be the next argument.
107 Search_Directory_Present
:= True;
113 -- Find out whether this is a -I- or regular -Ixxx switch
115 -- Note: -I switches are not recorded in the ALI file, since the
116 -- meaning of the program depends on the source files compiled,
117 -- not where they came from.
119 if Ptr
= Max
and then Switch_Chars
(Ptr
) = '-' then
120 Look_In_Primary_Dir
:= False;
122 Add_Src_Search_Dir
(Switch_Chars
(Ptr
.. Max
));
125 -- Processing of the --RTS switch. --RTS may have been modified by
126 -- gcc into -fRTS (for GCC targets).
129 and then (Switch_Chars
(Ptr
.. Ptr
+ 3) = "fRTS"
131 Switch_Chars
(Ptr
.. Ptr
+ 3) = "-RTS")
136 or else Switch_Chars
(Ptr
+ 3) /= '='
138 Osint
.Fail
("missing path for --RTS");
140 -- Check that this is the first time --RTS is specified or if
141 -- it is not the first time, the same path has been specified.
143 if RTS_Specified
= null then
144 RTS_Specified
:= new String'(Switch_Chars (Ptr + 4 .. Max));
147 RTS_Specified.all /= Switch_Chars (Ptr + 4 .. Max)
149 Osint.Fail ("--RTS cannot be specified multiple times");
152 -- Valid --RTS switch
154 Opt.No_Stdinc := True;
155 Opt.RTS_Switch := True;
159 (Switch_Chars (Ptr + 4 .. Max), Include);
163 (Switch_Chars (Ptr + 4 .. Max), Objects);
165 if RTS_Src_Path_Name /= null
166 and then RTS_Lib_Path_Name /= null
168 -- Store the -fRTS switch (Note: Store_Compilation_Switch
169 -- changes -fRTS back into --RTS for the actual output).
171 Store_Compilation_Switch (Switch_Chars);
173 elsif RTS_Src_Path_Name = null
174 and then RTS_Lib_Path_Name = null
176 Osint.Fail ("RTS path not valid: missing " &
177 "adainclude and adalib directories");
179 elsif RTS_Src_Path_Name = null then
180 Osint.Fail ("RTS path not valid: missing " &
181 "adainclude directory");
183 elsif RTS_Lib_Path_Name = null then
184 Osint.Fail ("RTS path not valid: missing " &
189 -- There are no other switches not starting with -gnat
192 Bad_Switch (Switch_Chars);
195 -- Case of switch starting with -gnat
200 -- Loop to scan through switches given in switch string
202 while Ptr <= Max loop
204 Store_Switch := True;
206 C := Switch_Chars (Ptr);
212 Assertions_Enabled := True;
213 Debug_Pragmas_Enabled := True;
215 -- Processing for A switch
219 Config_File := False;
221 -- Processing for b switch
225 Brief_Output := True;
227 -- Processing for B switch
231 Assume_No_Invalid_Values := True;
233 -- Processing for c switch
236 if not First_Switch then
238 ("-gnatc must be first if combined with other switches");
242 Operating_Mode := Check_Semantics;
244 -- Processing for C switch
249 if not CodePeer_Mode then
250 CodePeer_Mode := True;
252 -- Suppress compiler warnings by default, since what we are
253 -- interested in here is what CodePeer can find out. Note
254 -- that if -gnatwxxx is specified after -gnatC on the
255 -- command line, we do not want to override this setting in
256 -- Adjust_Global_Switches, and assume that the user wants to
257 -- get both warnings from GNAT and CodePeer messages.
259 Warning_Mode := Suppress;
262 -- Processing for d switch
265 Store_Switch := False;
268 -- Note: for the debug switch, the remaining characters in this
269 -- switch field must all be debug flags, since all valid switch
270 -- characters are also valid debug characters.
272 -- Loop to scan out debug flags
276 C := Switch_Chars (Ptr);
277 exit when C = ASCII.NUL or else C = '/' or else C = '-';
279 if C in '1' .. '9' or else
280 C in 'a
' .. 'z
' or else
284 Set_Dotted_Debug_Flag (C);
285 Store_Compilation_Switch ("-gnatd." & C);
288 Store_Compilation_Switch ("-gnatd" & C);
295 Bad_Switch ("-gnatd." & Switch_Chars (Ptr .. Max));
297 Bad_Switch ("-gnatd" & Switch_Chars (Ptr .. Max));
303 -- Processing for D switch
308 -- Scan optional integer line limit value
310 if Nat_Present (Switch_Chars, Max, Ptr) then
311 Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'D
');
312 Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40);
315 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
316 -- generation in the ali file) since otherwise this generation
317 -- gets confused by the "wrong" Sloc values put in the tree.
319 Debug_Generated_Code := True;
320 Xref_Active := False;
321 Set_Debug_Flag ('g
');
323 -- -gnate? (extended switches)
328 -- The -gnate? switches are all double character switches
329 -- so we must always have a character after the e.
332 Bad_Switch ("-gnate");
335 case Switch_Chars (Ptr) is
337 -- -gnatea (initial delimiter of explicit switches)
339 -- All switches that come before -gnatea have been added by
340 -- the GCC driver and are not stored in the ALI file.
341 -- See also -gnatez below.
344 Store_Switch := False;
345 Enable_Switch_Storing;
348 -- -gnatec (configuration pragmas)
351 Store_Switch := False;
354 -- There may be an equal sign between -gnatec and
355 -- the path name of the config file.
357 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
362 Bad_Switch ("-gnatec");
366 Config_File_Name : constant String_Access :=
368 (Switch_Chars
(Ptr
.. Max
));
371 if Config_File_Names
= null then
373 new String_List
'(1 => Config_File_Name);
377 New_Names : constant String_List_Access :=
380 Config_File_Names'Length + 1);
383 for Index in Config_File_Names'Range loop
385 Config_File_Names (Index);
386 Config_File_Names (Index) := null;
389 New_Names (New_Names'Last) := Config_File_Name;
390 Free (Config_File_Names);
391 Config_File_Names := New_Names;
398 -- -gnateC switch (CodePeer SCIL generation)
400 -- Not enabled for now, keep it for later???
401 -- use -gnatd.I only for now
405 -- Generate_SCIL := True;
407 -- -gnateD switch (preprocessing symbol definition)
410 Store_Switch := False;
414 Bad_Switch ("-gnateD");
417 Add_Symbol_Definition (Switch_Chars (Ptr .. Max));
421 Store_Compilation_Switch
422 ("-gnateD" & Switch_Chars (Ptr .. Max));
425 -- -gnateE (extra exception information)
428 Exception_Extra_Info := True;
431 -- -gnatef (full source path for brief error messages)
434 Store_Switch := False;
436 Full_Path_Name_For_Brief_Errors := True;
438 -- -gnateG (save preprocessor output)
441 Generate_Processed_File := True;
444 -- -gnateI (index of unit in multi-unit source)
448 Scan_Pos (Switch_Chars, Max, Ptr, Multiple_Unit_Index, C);
450 -- -gnatem (mapping file)
453 Store_Switch := False;
456 -- There may be an equal sign between -gnatem and
457 -- the path name of the mapping file.
459 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
464 Bad_Switch ("-gnatem");
468 new String'(Switch_Chars
(Ptr
.. Max
));
471 -- -gnatep (preprocessing data file)
474 Store_Switch
:= False;
477 -- There may be an equal sign between -gnatep and
478 -- the path name of the mapping file.
480 if Ptr
<= Max
and then Switch_Chars
(Ptr
) = '=' then
485 Bad_Switch
("-gnatep");
488 Preprocessing_Data_File
:=
489 new String'(Switch_Chars (Ptr .. Max));
491 -- Store the switch, normalizing to -gnatep=
493 Store_Compilation_Switch
494 ("-gnatep=" & Preprocessing_Data_File.all);
498 -- -gnateP (Treat pragma Pure/Preelaborate errs as warnings)
501 Treat_Categorization_Errors_As_Warnings := True;
503 -- -gnatez (final delimiter of explicit switches)
505 -- All switches that come after -gnatez have been added by
506 -- the GCC driver and are not stored in the ALI file. See
507 -- also -gnatea above.
510 Store_Switch := False;
511 Disable_Switch_Storing;
514 -- -gnateS (generate SCO information)
516 -- Include Source Coverage Obligation information in ALI
517 -- files for the benefit of source coverage analysis tools
521 Generate_SCO := True;
524 -- All other -gnate? switches are unassigned
527 Bad_Switch ("-gnate" & Switch_Chars (Ptr .. Max));
530 -- -gnatE (dynamic elaboration checks)
534 Dynamic_Elaboration_Checks := True;
536 -- -gnatf (full error messages)
540 All_Errors_Mode := True;
542 -- Processing for F switch
546 External_Name_Exp_Casing := Uppercase;
547 External_Name_Imp_Casing := Uppercase;
549 -- Processing for g switch
554 Identifier_Character_Set := 'n
';
555 System_Extend_Unit := Empty;
556 Warning_Mode := Treat_As_Error;
558 -- Set Ada 2012 mode explicitly. We don't want to rely on the
559 -- implicit setting here, since for example, we want
560 -- Preelaborate_05 treated as Preelaborate
562 Ada_Version := Ada_2012;
563 Ada_Version_Explicit := Ada_Version;
565 -- Set default warnings and style checks for -gnatg
567 Set_GNAT_Mode_Warnings;
568 Set_GNAT_Style_Check_Options;
570 -- Processing for G switch
574 Print_Generated_Code := True;
576 -- Scan optional integer line limit value
578 if Nat_Present (Switch_Chars, Max, Ptr) then
579 Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'G
');
580 Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40);
583 -- Processing for h switch
587 Usage_Requested := True;
589 -- Processing for H switch
595 -- Processing for i switch
599 Bad_Switch ("-gnati");
603 C := Switch_Chars (Ptr);
613 Identifier_Character_Set := C;
617 Bad_Switch ("-gnati" & Switch_Chars (Ptr .. Max));
620 -- Processing for I switch
624 Ignore_Rep_Clauses := True;
626 -- Processing for j switch
630 Scan_Nat (Switch_Chars, Max, Ptr, Error_Msg_Line_Length, C);
632 -- Processing for k switch
637 (Switch_Chars, Max, Ptr, Maximum_File_Name_Length, C);
639 -- Processing for l switch
645 -- There may be an equal sign between -gnatl and a file name
647 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
649 Osint.Fail ("file name for -gnatl= is null");
651 Opt.Full_List_File_Name :=
652 new String'(Switch_Chars
(Ptr
+ 1 .. Max
));
657 -- Processing for L switch
661 Dump_Source_Text
:= True;
663 -- Processing for m switch
667 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Maximum_Messages
, C
);
669 -- Processing for n switch
673 Inline_Active
:= True;
675 -- Processing for N switch
679 Inline_Active
:= True;
680 Front_End_Inlining
:= True;
682 -- Processing for o switch
686 Suppress_Options
(Overflow_Check
) := False;
687 Opt
.Enable_Overflow_Checks
:= True;
689 -- Processing for O switch
692 Store_Switch
:= False;
694 Output_File_Name_Present
:= True;
696 -- Processing for p switch
701 -- Skip processing if cancelled by subsequent -gnat-p
703 if Switch_Subsequently_Cancelled
("p", Args
, Arg_Rank
) then
704 Store_Switch
:= False;
707 -- Set all specific options as well as All_Checks in the
708 -- Suppress_Options array, excluding Elaboration_Check,
709 -- since this is treated specially because we do not want
710 -- -gnatp to disable static elaboration processing.
712 for J
in Suppress_Options
'Range loop
713 if J
/= Elaboration_Check
then
714 Suppress_Options
(J
) := True;
718 Validity_Checks_On
:= False;
719 Opt
.Suppress_Checks
:= True;
720 Opt
.Enable_Overflow_Checks
:= False;
723 -- Processing for P switch
727 Polling_Required
:= True;
729 -- Processing for q switch
733 Try_Semantics
:= True;
735 -- Processing for Q switch
739 Force_ALI_Tree_File
:= True;
740 Try_Semantics
:= True;
742 -- Processing for r switch
746 Treat_Restrictions_As_Warnings
:= True;
748 -- Processing for R switch
751 Back_Annotate_Rep_Info
:= True;
752 List_Representation_Info
:= 1;
755 while Ptr
<= Max
loop
756 C
:= Switch_Chars
(Ptr
);
758 if C
in '1' .. '3' then
759 List_Representation_Info
:=
760 Character'Pos (C
) - Character'Pos ('0');
762 elsif Switch_Chars
(Ptr
) = 's' then
763 List_Representation_Info_To_File
:= True;
765 elsif Switch_Chars
(Ptr
) = 'm' then
766 List_Representation_Info_Mechanisms
:= True;
769 Bad_Switch
("-gnatR" & Switch_Chars
(Ptr
.. Max
));
775 -- Processing for s switch
778 if not First_Switch
then
780 ("-gnats must be first if combined with other switches");
784 Operating_Mode
:= Check_Syntax
;
786 -- Processing for S switch
789 Print_Standard
:= True;
792 -- Processing for t switch
797 Back_Annotate_Rep_Info
:= True;
799 -- Processing for T switch
803 Scan_Pos
(Switch_Chars
, Max
, Ptr
, Table_Factor
, C
);
805 -- Processing for u switch
811 -- Processing for U switch
815 Unique_Error_Tag
:= True;
817 -- Processing for v switch
821 Verbose_Mode
:= True;
823 -- Processing for V switch
826 Store_Switch
:= False;
830 Bad_Switch
("-gnatV");
837 Set_Validity_Check_Options
838 (Switch_Chars
(Ptr
.. Max
), OK
, Ptr
);
841 Bad_Switch
("-gnatV" & Switch_Chars
(Ptr
.. Max
));
844 for Index
in First_Char
+ 1 .. Max
loop
845 Store_Compilation_Switch
846 ("-gnatV" & Switch_Chars
(Index
));
853 -- Processing for w switch
856 Store_Switch
:= False;
860 Bad_Switch
("-gnatw");
863 while Ptr
<= Max
loop
864 C
:= Switch_Chars
(Ptr
);
866 -- Case of dot switch
868 if C
= '.' and then Ptr
< Max
then
870 C
:= Switch_Chars
(Ptr
);
872 if Set_Dot_Warning_Switch
(C
) then
873 Store_Compilation_Switch
("-gnatw." & C
);
875 Bad_Switch
("-gnatw." & Switch_Chars
(Ptr
.. Max
));
878 -- Normal case, no dot
881 if Set_Warning_Switch
(C
) then
882 Store_Compilation_Switch
("-gnatw" & C
);
884 Bad_Switch
("-gnatw" & Switch_Chars
(Ptr
.. Max
));
893 -- Processing for W switch
899 Bad_Switch
("-gnatW");
903 Wide_Character_Encoding_Method
:=
904 Get_WC_Encoding_Method
(Switch_Chars
(Ptr
));
906 when Constraint_Error
=>
907 Bad_Switch
("-gnatW" & Switch_Chars
(Ptr
.. Max
));
910 Wide_Character_Encoding_Method_Specified
:= True;
912 Upper_Half_Encoding
:=
913 Wide_Character_Encoding_Method
in
914 WC_Upper_Half_Encoding_Method
;
918 -- Processing for x switch
922 Xref_Active
:= False;
924 -- Processing for X switch
928 Extensions_Allowed
:= True;
929 Ada_Version
:= Ada_Version_Type
'Last;
930 Ada_Version_Explicit
:= Ada_Version_Type
'Last;
932 -- Processing for y switch
938 Set_Default_Style_Check_Options
;
941 Store_Switch
:= False;
947 Set_Style_Check_Options
948 (Switch_Chars
(Ptr
.. Max
), OK
, Ptr
);
952 ("bad -gnaty switch (" &
953 Style_Msg_Buf
(1 .. Style_Msg_Len
) & ')');
956 Ptr
:= First_Char
+ 1;
957 while Ptr
<= Max
loop
958 if Switch_Chars
(Ptr
) = 'M' then
963 or else Switch_Chars
(Ptr
) not in '0' .. '9';
966 Store_Compilation_Switch
967 ("-gnaty" & Switch_Chars
(First_Char
.. Ptr
- 1));
970 Store_Compilation_Switch
971 ("-gnaty" & Switch_Chars
(Ptr
));
978 -- Processing for z switch
982 -- -gnatz must be the first and only switch in Switch_Chars,
983 -- and is a two-letter switch.
985 if Ptr
/= Switch_Chars
'First + 5
986 or else (Max
- Ptr
+ 1) > 2
989 ("-gnatz* may not be combined with other switches");
993 Bad_Switch
("-gnatz");
998 -- Only one occurrence of -gnat* is permitted
1000 if Distribution_Stub_Mode
= No_Stubs
then
1001 case Switch_Chars
(Ptr
) is
1003 Distribution_Stub_Mode
:= Generate_Receiver_Stub_Body
;
1006 Distribution_Stub_Mode
:= Generate_Caller_Stub_Body
;
1009 Bad_Switch
("-gnatz" & Switch_Chars
(Ptr
.. Max
));
1015 Osint
.Fail
("only one -gnatz* switch allowed");
1018 -- Processing for Z switch
1023 ("-gnatZ is no longer supported: consider using --RTS=zcx");
1025 -- Processing for 83 switch
1029 Bad_Switch
("-gnat8");
1034 if Switch_Chars
(Ptr
) /= '3' then
1035 Bad_Switch
("-gnat8" & Switch_Chars
(Ptr
.. Max
));
1038 Ada_Version
:= Ada_83
;
1039 Ada_Version_Explicit
:= Ada_Version
;
1042 -- Processing for 95 switch
1046 Bad_Switch
("-gnat9");
1051 if Switch_Chars
(Ptr
) /= '5' then
1052 Bad_Switch
("-gnat9" & Switch_Chars
(Ptr
.. Max
));
1055 Ada_Version
:= Ada_95
;
1056 Ada_Version_Explicit
:= Ada_Version
;
1059 -- Processing for 05 switch
1063 Bad_Switch
("-gnat0");
1068 if Switch_Chars
(Ptr
) /= '5' then
1069 Bad_Switch
("-gnat0" & Switch_Chars
(Ptr
.. Max
));
1072 Ada_Version
:= Ada_2005
;
1073 Ada_Version_Explicit
:= Ada_Version
;
1076 -- Processing for 12 switch
1080 Bad_Switch
("-gnat1");
1085 if Switch_Chars
(Ptr
) /= '2' then
1086 Bad_Switch
("-gnat1" & Switch_Chars
(Ptr
.. Max
));
1089 Ada_Version
:= Ada_2012
;
1090 Ada_Version_Explicit
:= Ada_Version
;
1093 -- Processing for 2005 and 2012 switches
1096 if Ptr
> Max
- 3 then
1097 Bad_Switch
("-gnat" & Switch_Chars
(Ptr
.. Max
));
1099 elsif Switch_Chars
(Ptr
.. Ptr
+ 3) = "2005" then
1100 Ada_Version
:= Ada_2005
;
1102 elsif Switch_Chars
(Ptr
.. Ptr
+ 3) = "2012" then
1103 Ada_Version
:= Ada_2012
;
1106 Bad_Switch
("-gnat" & Switch_Chars
(Ptr
.. Ptr
+ 3));
1109 Ada_Version_Explicit
:= Ada_Version
;
1112 -- Switch cancellation, currently only -gnat-p is allowed.
1113 -- All we do here is the error checking, since the actual
1114 -- processing for switch cancellation is done by calls to
1115 -- Switch_Subsequently_Cancelled at the appropriate point.
1119 -- Simple ignore -gnat-p
1121 if Switch_Chars
= "-gnat-p" then
1124 -- Any other occurrence of minus is ignored. This is for
1125 -- maximum compatibility with previous version which ignored
1126 -- all occurrences of minus.
1129 Store_Switch
:= False;
1133 -- We ignore '/' in switches, this is historical, still needed???
1136 Store_Switch
:= False;
1138 -- Anything else is an error (illegal switch character)
1141 Bad_Switch
("-gnat" & Switch_Chars
(Ptr
.. Max
));
1144 if Store_Switch
then
1145 Store_Compilation_Switch
1146 ("-gnat" & Switch_Chars
(First_Char
.. Ptr
- 1));
1149 First_Switch
:= False;
1152 end Scan_Front_End_Switches
;
1154 -----------------------------------
1155 -- Switch_Subsequently_Cancelled --
1156 -----------------------------------
1158 function Switch_Subsequently_Cancelled
1160 Args
: Argument_List
;
1161 Arg_Rank
: Positive) return Boolean
1163 use type System
.Strings
.String_Access
;
1166 -- Loop through arguments following the current one
1168 for Arg
in Arg_Rank
+ 1 .. Args
'Last loop
1169 if Args
(Arg
).all = "-gnat-" & C
then
1174 -- No match found, not cancelled
1177 end Switch_Subsequently_Cancelled
;