1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2001-2008, 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;
35 with System.OS_Lib; use System.OS_Lib;
37 with System.WCh_Con; use System.WCh_Con;
39 package body Switch.C is
41 RTS_Specified : String_Access := null;
42 -- Used to detect multiple use of --RTS= flag
44 -----------------------------
45 -- Scan_Front_End_Switches --
46 -----------------------------
48 procedure Scan_Front_End_Switches (Switch_Chars : String) is
49 First_Switch : Boolean := True;
50 -- False for all but first switch
52 Max : constant Natural := Switch_Chars'Last;
57 Store_Switch : Boolean;
58 -- For -gnatxx switches, the normal processing, signalled by this flag
59 -- being set to True, is to store the switch on exit from the case
60 -- statement, the switch stored is -gnat followed by the characters
61 -- from First_Char to Ptr-1. For cases like -gnaty, where the switch
62 -- is stored in separate pieces, this flag is set to False, and the
63 -- appropriate calls to Store_Compilation_Switch are made from within
66 First_Char : Positive;
67 -- Marks start of switch to be stored
70 Ptr := Switch_Chars'First;
72 -- Skip past the initial character (must be the switch character)
80 -- Handle switches that do not start with -gnat
83 or else Switch_Chars (Ptr .. Ptr + 3) /= "gnat"
85 -- There are two front-end switches that do not start with -gnat:
88 if Switch_Chars (Ptr) = 'I' then
90 -- Set flag Search_Directory_Present if switch is "-I" only:
91 -- the directory will be the next argument.
94 Search_Directory_Present := True;
100 -- Find out whether this is a -I- or regular -Ixxx switch
102 -- Note: -I switches are not recorded in the ALI file, since the
103 -- meaning of the program depends on the source files compiled,
104 -- not where they came from.
106 if Ptr = Max and then Switch_Chars (Ptr) = '-' then
107 Look_In_Primary_Dir := False;
109 Add_Src_Search_Dir (Switch_Chars (Ptr .. Max));
112 -- Processing of the --RTS switch. --RTS may have been modified by
113 -- gcc into -fRTS (for GCC targets).
116 and then (Switch_Chars (Ptr .. Ptr + 3) = "fRTS"
118 Switch_Chars (Ptr .. Ptr + 3) = "-RTS")
123 or else Switch_Chars (Ptr + 3) /= '='
125 Osint.Fail ("missing path for --RTS");
127 -- Check that this is the first time --RTS is specified or if
128 -- it is not the first time, the same path has been specified.
130 if RTS_Specified = null then
131 RTS_Specified := new String'(Switch_Chars (Ptr + 4 .. Max));
134 RTS_Specified.all /= Switch_Chars (Ptr + 4 .. Max)
137 ("--RTS cannot be specified multiple times");
140 -- Valid --RTS switch
142 Opt.No_Stdinc := True;
143 Opt.RTS_Switch := True;
147 (Switch_Chars (Ptr + 4 .. Max), Include);
151 (Switch_Chars (Ptr + 4 .. Max), Objects);
153 if RTS_Src_Path_Name /= null
154 and then RTS_Lib_Path_Name /= null
156 -- Store the -fRTS switch (Note: Store_Compilation_Switch
157 -- changes -fRTS back into --RTS for the actual output).
159 Store_Compilation_Switch (Switch_Chars);
161 elsif RTS_Src_Path_Name = null
162 and then RTS_Lib_Path_Name = null
164 Osint.Fail ("RTS path not valid: missing " &
165 "adainclude and adalib directories");
167 elsif RTS_Src_Path_Name = null then
168 Osint.Fail ("RTS path not valid: missing " &
169 "adainclude directory");
171 elsif RTS_Lib_Path_Name = null then
172 Osint.Fail ("RTS path not valid: missing " &
177 -- There are no other switches not starting with -gnat
180 Bad_Switch (Switch_Chars);
183 -- Case of switch starting with -gnat
188 -- Loop to scan through switches given in switch string
190 while Ptr <= Max loop
192 Store_Switch := True;
194 C := Switch_Chars (Ptr);
200 Assertions_Enabled := True;
201 Debug_Pragmas_Enabled := True;
203 -- Processing for A switch
207 Config_File := False;
209 -- Processing for b switch
213 Brief_Output := True;
215 -- Processing for B switch
219 Assume_No_Invalid_Values := True;
221 -- Processing for c switch
224 if not First_Switch then
226 ("-gnatc must be first if combined with other switches");
230 Operating_Mode := Check_Semantics;
236 -- Processing for d switch
239 Store_Switch := False;
242 -- Note: for the debug switch, the remaining characters in this
243 -- switch field must all be debug flags, since all valid switch
244 -- characters are also valid debug characters.
246 -- Loop to scan out debug flags
250 C := Switch_Chars (Ptr);
251 exit when C = ASCII.NUL or else C = '/' or else C = '-';
253 if C in '1' .. '9' or else
254 C in 'a' .. 'z' or else
258 Set_Dotted_Debug_Flag (C);
259 Store_Compilation_Switch ("-gnatd." & C);
262 Store_Compilation_Switch ("-gnatd" & C);
269 Bad_Switch ("-gnatd." & Switch_Chars (Ptr .. Max));
271 Bad_Switch ("-gnatd" & Switch_Chars (Ptr .. Max));
277 -- Processing for D switch
282 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
283 -- generation in the ali file) since otherwise this generation
284 -- gets confused by the "wrong" Sloc values put in the tree.
286 Debug_Generated_Code := True;
287 Xref_Active := False;
288 Set_Debug_Flag ('g');
290 -- -gnate? (extended switches)
295 -- The -gnate? switches are all double character switches
296 -- so we must always have a character after the e.
299 Bad_Switch ("-gnate");
302 case Switch_Chars (Ptr) is
305 Store_Switch := False;
306 Enable_Switch_Storing;
309 -- -gnatec (configuration pragmas)
312 Store_Switch := False;
315 -- There may be an equal sign between -gnatec and
316 -- the path name of the config file.
318 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
323 Bad_Switch ("-gnatec");
327 Config_File_Name : constant String_Access :=
329 (Switch_Chars (Ptr .. Max));
332 if Config_File_Names = null then
334 new String_List'(1 => Config_File_Name);
338 New_Names : constant String_List_Access :=
341 Config_File_Names'Length + 1);
344 for Index in Config_File_Names'Range loop
346 Config_File_Names (Index);
347 Config_File_Names (Index) := null;
350 New_Names (New_Names'Last) := Config_File_Name;
351 Free (Config_File_Names);
352 Config_File_Names := New_Names;
359 -- -gnateD switch (preprocessing symbol definition)
362 Store_Switch := False;
366 Bad_Switch ("-gnateD");
369 Add_Symbol_Definition (Switch_Chars (Ptr .. Max));
373 Store_Compilation_Switch
374 ("-gnateD" & Switch_Chars (Ptr .. Max));
377 -- -gnatef (full source path for brief error messages)
380 Store_Switch := False;
382 Full_Path_Name_For_Brief_Errors := True;
385 -- -gnateG (save preprocessor output)
389 Bad_Switch (Switch_Chars);
392 Generate_Processed_File := True;
395 -- -gnateI (index of unit in multi-unit source)
399 Scan_Pos (Switch_Chars, Max, Ptr, Multiple_Unit_Index, C);
401 -- -gnatem (mapping file)
404 Store_Switch := False;
407 -- There may be an equal sign between -gnatem and
408 -- the path name of the mapping file.
410 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
415 Bad_Switch ("-gnatem");
419 new String'(Switch_Chars (Ptr .. Max));
422 -- -gnatep (preprocessing data file)
425 Store_Switch := False;
428 -- There may be an equal sign between -gnatep and
429 -- the path name of the mapping file.
431 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
436 Bad_Switch ("-gnatep");
439 Preprocessing_Data_File :=
440 new String'(Switch_Chars (Ptr .. Max));
442 -- Store the switch, normalizing to -gnatep=
444 Store_Compilation_Switch
445 ("-gnatep=" & Preprocessing_Data_File.all);
450 Store_Switch := False;
451 Disable_Switch_Storing;
454 -- All other -gnate? switches are unassigned
457 Bad_Switch ("-gnate" & Switch_Chars (Ptr .. Max));
460 -- -gnatE (dynamic elaboration checks)
464 Dynamic_Elaboration_Checks := True;
466 -- -gnatf (full error messages)
470 All_Errors_Mode := True;
472 -- Processing for F switch
476 External_Name_Exp_Casing := Uppercase;
477 External_Name_Imp_Casing := Uppercase;
479 -- Processing for g switch
484 Identifier_Character_Set := 'n';
485 System_Extend_Unit := Empty;
486 Warning_Mode := Treat_As_Error;
488 -- Set Ada 2005 mode explicitly. We don't want to rely on the
489 -- implicit setting here, since for example, we want
490 -- Preelaborate_05 treated as Preelaborate
492 Ada_Version := Ada_05;
493 Ada_Version_Explicit := Ada_Version;
495 -- Set default warnings for -gnatg
497 Check_Unreferenced := True;
498 Check_Unreferenced_Formals := True;
500 Constant_Condition_Warnings := True;
501 Implementation_Unit_Warnings := True;
502 Ineffective_Inline_Warnings := True;
503 Warn_On_Assertion_Failure := True;
504 Warn_On_Assumed_Low_Bound := True;
505 Warn_On_Bad_Fixed_Value := True;
506 Warn_On_Constant := True;
507 Warn_On_Export_Import := True;
508 Warn_On_Modified_Unread := True;
509 Warn_On_No_Value_Assigned := True;
510 Warn_On_Non_Local_Exception := False;
511 Warn_On_Obsolescent_Feature := True;
512 Warn_On_Redundant_Constructs := True;
513 Warn_On_Object_Renames_Function := True;
514 Warn_On_Unchecked_Conversion := True;
515 Warn_On_Unrecognized_Pragma := True;
517 Set_GNAT_Style_Check_Options;
519 -- Processing for G switch
523 Print_Generated_Code := True;
525 -- Processing for h switch
529 Usage_Requested := True;
531 -- Processing for H switch
537 -- Processing for i switch
541 Bad_Switch ("-gnati");
545 C := Switch_Chars (Ptr);
555 Identifier_Character_Set := C;
559 Bad_Switch ("-gnati" & Switch_Chars (Ptr .. Max));
562 -- Processing for I switch
566 Ignore_Rep_Clauses := True;
568 -- Processing for j switch
573 -- There may be an equal sign between -gnatj and the value
575 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
579 Scan_Nat (Switch_Chars, Max, Ptr, Error_Msg_Line_Length, C);
581 -- Processing for k switch
586 (Switch_Chars, Max, Ptr, Maximum_File_Name_Length, C);
588 -- Processing for l switch
594 -- There may be an equal sign between -gnatl and a file name
596 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
598 Osint.Fail ("file name for -gnatl= is null");
600 Opt.Full_List_File_Name :=
601 new String'(Switch_Chars (Ptr + 1 .. Max));
606 -- Processing for L switch
610 Dump_Source_Text := True;
612 -- Processing for m switch
617 -- There may be an equal sign between -gnatm and the value
619 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
623 Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Errors, C);
625 -- Processing for n switch
629 Inline_Active := True;
631 -- Processing for N switch
635 Inline_Active := True;
636 Front_End_Inlining := True;
638 -- Processing for o switch
642 Suppress_Options (Overflow_Check) := False;
643 Opt.Enable_Overflow_Checks := True;
645 -- Processing for O switch
648 Store_Switch := False;
650 Output_File_Name_Present := True;
652 -- Processing for p switch
657 -- Set all specific options as well as All_Checks in the
658 -- Suppress_Options array, excluding Elaboration_Check, since
659 -- this is treated specially because we do not want -gnatp to
660 -- disable static elaboration processing.
662 for J in Suppress_Options'Range loop
663 if J /= Elaboration_Check then
664 Suppress_Options (J) := True;
668 Validity_Checks_On := False;
669 Opt.Suppress_Checks := True;
670 Opt.Enable_Overflow_Checks := False;
672 -- Processing for P switch
676 Polling_Required := True;
678 -- Processing for q switch
682 Try_Semantics := True;
684 -- Processing for Q switch
688 Force_ALI_Tree_File := True;
689 Try_Semantics := True;
691 -- Processing for r switch
695 Treat_Restrictions_As_Warnings := True;
697 -- Processing for R switch
700 Back_Annotate_Rep_Info := True;
701 List_Representation_Info := 1;
704 while Ptr <= Max loop
705 C := Switch_Chars (Ptr);
707 if C in '1' .. '3' then
708 List_Representation_Info :=
709 Character'Pos (C) - Character'Pos ('0');
711 elsif Switch_Chars (Ptr) = 's' then
712 List_Representation_Info_To_File := True;
714 elsif Switch_Chars (Ptr) = 'm' then
715 List_Representation_Info_Mechanisms := True;
718 Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max));
724 -- Processing for s switch
727 if not First_Switch then
729 ("-gnats must be first if combined with other switches");
733 Operating_Mode := Check_Syntax;
735 -- Processing for S switch
738 Print_Standard := True;
741 -- Processing for t switch
747 if Operating_Mode = Check_Semantics then
751 Back_Annotate_Rep_Info := True;
753 -- Processing for T switch
757 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C);
759 -- Processing for u switch
765 -- Processing for U switch
769 Unique_Error_Tag := True;
771 -- Processing for v switch
775 Verbose_Mode := True;
777 -- Processing for V switch
780 Store_Switch := False;
784 Bad_Switch ("-gnatV");
791 Set_Validity_Check_Options
792 (Switch_Chars (Ptr .. Max), OK, Ptr);
795 Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max));
798 for Index in First_Char + 1 .. Max loop
799 Store_Compilation_Switch
800 ("-gnatV" & Switch_Chars (Index));
807 -- Processing for w switch
810 Store_Switch := False;
814 Bad_Switch ("-gnatw");
817 while Ptr <= Max loop
818 C := Switch_Chars (Ptr);
820 -- Case of dot switch
822 if C = '.' and then Ptr < Max then
824 C := Switch_Chars (Ptr);
826 if Set_Dot_Warning_Switch (C) then
827 Store_Compilation_Switch ("-gnatw." & C);
829 Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max));
832 -- Normal case, no dot
835 if Set_Warning_Switch (C) then
836 Store_Compilation_Switch ("-gnatw" & C);
838 Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max));
847 -- Processing for W switch
853 Bad_Switch ("-gnatW");
857 Wide_Character_Encoding_Method :=
858 Get_WC_Encoding_Method (Switch_Chars (Ptr));
860 when Constraint_Error =>
861 Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max));
864 Wide_Character_Encoding_Method_Specified := True;
866 Upper_Half_Encoding :=
867 Wide_Character_Encoding_Method in
868 WC_Upper_Half_Encoding_Method;
872 -- Processing for x switch
876 Xref_Active := False;
878 -- Processing for X switch
882 Extensions_Allowed := True;
884 -- Processing for y switch
890 Set_Default_Style_Check_Options;
893 Store_Switch := False;
899 Set_Style_Check_Options
900 (Switch_Chars (Ptr .. Max), OK, Ptr);
904 ("bad -gnaty switch (" &
905 Style_Msg_Buf (1 .. Style_Msg_Len) & ')');
908 Ptr := First_Char + 1;
909 while Ptr <= Max loop
910 if Switch_Chars (Ptr) = 'M' then
915 or else Switch_Chars (Ptr) not in '0' .. '9';
918 Store_Compilation_Switch
919 ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1));
922 Store_Compilation_Switch
923 ("-gnaty" & Switch_Chars (Ptr));
930 -- Processing for z switch
935 -- Allowed for compiler only if this is the only
936 -- -z switch, we do not allow multiple occurrences
938 if Distribution_Stub_Mode = No_Stubs then
939 case Switch_Chars (Ptr) is
941 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
944 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
947 Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max));
953 -- Processing for Z switch
958 ("-gnatZ is no longer supported: consider using --RTS=zcx");
960 -- Processing for 83 switch
964 Bad_Switch ("-gnat8");
969 if Switch_Chars (Ptr) /= '3' then
970 Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max));
973 Ada_Version := Ada_83;
974 Ada_Version_Explicit := Ada_Version;
977 -- Processing for 95 switch
981 Bad_Switch ("-gnat9");
986 if Switch_Chars (Ptr) /= '5' then
987 Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max));
990 Ada_Version := Ada_95;
991 Ada_Version_Explicit := Ada_Version;
994 -- Processing for 05 switch
998 Bad_Switch ("-gnat0");
1003 if Switch_Chars (Ptr) /= '5' then
1004 Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max));
1007 Ada_Version := Ada_05;
1008 Ada_Version_Explicit := Ada_Version;
1011 -- Ignore extra switch character
1016 -- Anything else is an error (illegal switch character)
1019 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1022 if Store_Switch then
1023 Store_Compilation_Switch
1024 ("-gnat" & Switch_Chars (First_Char .. Ptr - 1));
1027 First_Switch := False;
1030 end Scan_Front_End_Switches;