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 -- -gnatez (final delimiter of explicit switches)
500 -- All switches that come after -gnatez have been added by
501 -- the GCC driver and are not stored in the ALI file. See
502 -- also -gnatea above.
505 Store_Switch := False;
506 Disable_Switch_Storing;
509 -- -gnateS (generate SCO information)
511 -- Include Source Coverage Obligation information in ALI
512 -- files for the benefit of source coverage analysis tools
516 Generate_SCO := True;
519 -- All other -gnate? switches are unassigned
522 Bad_Switch ("-gnate" & Switch_Chars (Ptr .. Max));
525 -- -gnatE (dynamic elaboration checks)
529 Dynamic_Elaboration_Checks := True;
531 -- -gnatf (full error messages)
535 All_Errors_Mode := True;
537 -- Processing for F switch
541 External_Name_Exp_Casing := Uppercase;
542 External_Name_Imp_Casing := Uppercase;
544 -- Processing for g switch
549 Identifier_Character_Set := 'n';
550 System_Extend_Unit := Empty;
551 Warning_Mode := Treat_As_Error;
553 -- Set Ada 2012 mode explicitly. We don't want to rely on the
554 -- implicit setting here, since for example, we want
555 -- Preelaborate_05 treated as Preelaborate
557 Ada_Version := Ada_2012;
558 Ada_Version_Explicit := Ada_Version;
560 -- Set default warnings and style checks for -gnatg
562 Set_GNAT_Mode_Warnings;
563 Set_GNAT_Style_Check_Options;
565 -- Processing for G switch
569 Print_Generated_Code := True;
571 -- Scan optional integer line limit value
573 if Nat_Present (Switch_Chars, Max, Ptr) then
574 Scan_Nat (Switch_Chars, Max, Ptr, Sprint_Line_Limit, 'G');
575 Sprint_Line_Limit := Nat'Max (Sprint_Line_Limit, 40);
578 -- Processing for h switch
582 Usage_Requested := True;
584 -- Processing for H switch
590 -- Processing for i switch
594 Bad_Switch ("-gnati");
598 C := Switch_Chars (Ptr);
608 Identifier_Character_Set := C;
612 Bad_Switch ("-gnati" & Switch_Chars (Ptr .. Max));
615 -- Processing for I switch
619 Ignore_Rep_Clauses := True;
621 -- Processing for j switch
625 Scan_Nat (Switch_Chars, Max, Ptr, Error_Msg_Line_Length, C);
627 -- Processing for k switch
632 (Switch_Chars, Max, Ptr, Maximum_File_Name_Length, C);
634 -- Processing for l switch
640 -- There may be an equal sign between -gnatl and a file name
642 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
644 Osint.Fail ("file name for -gnatl= is null");
646 Opt.Full_List_File_Name :=
647 new String'(Switch_Chars (Ptr + 1 .. Max));
652 -- Processing for L switch
656 Dump_Source_Text := True;
658 -- Processing for m switch
662 Scan_Nat (Switch_Chars, Max, Ptr, Maximum_Messages, C);
664 -- Processing for n switch
668 Inline_Active := True;
670 -- Processing for N switch
674 Inline_Active := True;
675 Front_End_Inlining := True;
677 -- Processing for o switch
681 Suppress_Options (Overflow_Check) := False;
682 Opt.Enable_Overflow_Checks := True;
684 -- Processing for O switch
687 Store_Switch := False;
689 Output_File_Name_Present := True;
691 -- Processing for p switch
696 -- Skip processing if cancelled by subsequent -gnat-p
698 if Switch_Subsequently_Cancelled ("p", Args, Arg_Rank) then
699 Store_Switch := False;
702 -- Set all specific options as well as All_Checks in the
703 -- Suppress_Options array, excluding Elaboration_Check,
704 -- since this is treated specially because we do not want
705 -- -gnatp to disable static elaboration processing.
707 for J in Suppress_Options'Range loop
708 if J /= Elaboration_Check then
709 Suppress_Options (J) := True;
713 Validity_Checks_On := False;
714 Opt.Suppress_Checks := True;
715 Opt.Enable_Overflow_Checks := False;
718 -- Processing for P switch
722 Polling_Required := True;
724 -- Processing for q switch
728 Try_Semantics := True;
730 -- Processing for Q switch
734 Force_ALI_Tree_File := True;
735 Try_Semantics := True;
737 -- Processing for r switch
741 Treat_Restrictions_As_Warnings := True;
743 -- Processing for R switch
746 Back_Annotate_Rep_Info := True;
747 List_Representation_Info := 1;
750 while Ptr <= Max loop
751 C := Switch_Chars (Ptr);
753 if C in '1' .. '3' then
754 List_Representation_Info :=
755 Character'Pos (C) - Character'Pos ('0');
757 elsif Switch_Chars (Ptr) = 's' then
758 List_Representation_Info_To_File := True;
760 elsif Switch_Chars (Ptr) = 'm' then
761 List_Representation_Info_Mechanisms := True;
764 Bad_Switch ("-gnatR" & Switch_Chars (Ptr .. Max));
770 -- Processing for s switch
773 if not First_Switch then
775 ("-gnats must be first if combined with other switches");
779 Operating_Mode := Check_Syntax;
781 -- Processing for S switch
784 Print_Standard := True;
787 -- Processing for t switch
792 Back_Annotate_Rep_Info := True;
794 -- Processing for T switch
798 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor, C);
800 -- Processing for u switch
806 -- Processing for U switch
810 Unique_Error_Tag := True;
812 -- Processing for v switch
816 Verbose_Mode := True;
818 -- Processing for V switch
821 Store_Switch := False;
825 Bad_Switch ("-gnatV");
832 Set_Validity_Check_Options
833 (Switch_Chars (Ptr .. Max), OK, Ptr);
836 Bad_Switch ("-gnatV" & Switch_Chars (Ptr .. Max));
839 for Index in First_Char + 1 .. Max loop
840 Store_Compilation_Switch
841 ("-gnatV" & Switch_Chars (Index));
848 -- Processing for w switch
851 Store_Switch := False;
855 Bad_Switch ("-gnatw");
858 while Ptr <= Max loop
859 C := Switch_Chars (Ptr);
861 -- Case of dot switch
863 if C = '.' and then Ptr < Max then
865 C := Switch_Chars (Ptr);
867 if Set_Dot_Warning_Switch (C) then
868 Store_Compilation_Switch ("-gnatw." & C);
870 Bad_Switch ("-gnatw." & Switch_Chars (Ptr .. Max));
873 -- Normal case, no dot
876 if Set_Warning_Switch (C) then
877 Store_Compilation_Switch ("-gnatw" & C);
879 Bad_Switch ("-gnatw" & Switch_Chars (Ptr .. Max));
888 -- Processing for W switch
894 Bad_Switch ("-gnatW");
898 Wide_Character_Encoding_Method :=
899 Get_WC_Encoding_Method (Switch_Chars (Ptr));
901 when Constraint_Error =>
902 Bad_Switch ("-gnatW" & Switch_Chars (Ptr .. Max));
905 Wide_Character_Encoding_Method_Specified := True;
907 Upper_Half_Encoding :=
908 Wide_Character_Encoding_Method in
909 WC_Upper_Half_Encoding_Method;
913 -- Processing for x switch
917 Xref_Active := False;
919 -- Processing for X switch
923 Extensions_Allowed := True;
924 Ada_Version := Ada_Version_Type'Last;
925 Ada_Version_Explicit := Ada_Version_Type'Last;
927 -- Processing for y switch
933 Set_Default_Style_Check_Options;
936 Store_Switch := False;
942 Set_Style_Check_Options
943 (Switch_Chars (Ptr .. Max), OK, Ptr);
947 ("bad -gnaty switch (" &
948 Style_Msg_Buf (1 .. Style_Msg_Len) & ')');
951 Ptr := First_Char + 1;
952 while Ptr <= Max loop
953 if Switch_Chars (Ptr) = 'M' then
958 or else Switch_Chars (Ptr) not in '0' .. '9';
961 Store_Compilation_Switch
962 ("-gnaty" & Switch_Chars (First_Char .. Ptr - 1));
965 Store_Compilation_Switch
966 ("-gnaty" & Switch_Chars (Ptr));
973 -- Processing for z switch
977 -- -gnatz must be the first and only switch in Switch_Chars,
978 -- and is a two-letter switch.
980 if Ptr /= Switch_Chars'First + 5
981 or else (Max - Ptr + 1) > 2
984 ("-gnatz* may not be combined with other switches");
988 Bad_Switch ("-gnatz");
993 -- Only one occurrence of -gnat* is permitted
995 if Distribution_Stub_Mode = No_Stubs then
996 case Switch_Chars (Ptr) is
998 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
1001 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
1004 Bad_Switch ("-gnatz" & Switch_Chars (Ptr .. Max));
1010 Osint.Fail ("only one -gnatz* switch allowed");
1013 -- Processing for Z switch
1018 ("-gnatZ is no longer supported: consider using --RTS=zcx");
1020 -- Processing for 83 switch
1024 Bad_Switch ("-gnat8");
1029 if Switch_Chars (Ptr) /= '3' then
1030 Bad_Switch ("-gnat8" & Switch_Chars (Ptr .. Max));
1033 Ada_Version := Ada_83;
1034 Ada_Version_Explicit := Ada_Version;
1037 -- Processing for 95 switch
1041 Bad_Switch ("-gnat9");
1046 if Switch_Chars (Ptr) /= '5' then
1047 Bad_Switch ("-gnat9" & Switch_Chars (Ptr .. Max));
1050 Ada_Version := Ada_95;
1051 Ada_Version_Explicit := Ada_Version;
1054 -- Processing for 05 switch
1058 Bad_Switch ("-gnat0");
1063 if Switch_Chars (Ptr) /= '5' then
1064 Bad_Switch ("-gnat0" & Switch_Chars (Ptr .. Max));
1067 Ada_Version := Ada_2005;
1068 Ada_Version_Explicit := Ada_Version;
1071 -- Processing for 12 switch
1075 Bad_Switch ("-gnat1");
1080 if Switch_Chars (Ptr) /= '2' then
1081 Bad_Switch ("-gnat1" & Switch_Chars (Ptr .. Max));
1084 Ada_Version := Ada_2012;
1085 Ada_Version_Explicit := Ada_Version;
1088 -- Processing for 2005 and 2012 switches
1091 if Ptr > Max - 3 then
1092 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1094 elsif Switch_Chars (Ptr .. Ptr + 3) = "2005" then
1095 Ada_Version := Ada_2005;
1097 elsif Switch_Chars (Ptr .. Ptr + 3) = "2012" then
1098 Ada_Version := Ada_2012;
1101 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Ptr + 3));
1104 Ada_Version_Explicit := Ada_Version;
1107 -- Switch cancellation, currently only -gnat-p is allowed.
1108 -- All we do here is the error checking, since the actual
1109 -- processing for switch cancellation is done by calls to
1110 -- Switch_Subsequently_Cancelled at the appropriate point.
1114 -- Simple ignore -gnat-p
1116 if Switch_Chars = "-gnat-p" then
1119 -- Any other occurrence of minus is ignored. This is for
1120 -- maximum compatibility with previous version which ignored
1121 -- all occurrences of minus.
1124 Store_Switch := False;
1128 -- We ignore '/' in switches, this is historical, still needed???
1131 Store_Switch := False;
1133 -- Anything else is an error (illegal switch character)
1136 Bad_Switch ("-gnat" & Switch_Chars (Ptr .. Max));
1139 if Store_Switch then
1140 Store_Compilation_Switch
1141 ("-gnat" & Switch_Chars (First_Char .. Ptr - 1));
1144 First_Switch := False;
1147 end Scan_Front_End_Switches;
1149 -----------------------------------
1150 -- Switch_Subsequently_Cancelled --
1151 -----------------------------------
1153 function Switch_Subsequently_Cancelled
1155 Args : Argument_List;
1156 Arg_Rank : Positive) return Boolean
1158 use type System.Strings.String_Access;
1161 -- Loop through arguments following the current one
1163 for Arg in Arg_Rank + 1 .. Args'Last loop
1164 if Args (Arg).all = "-gnat-" & C then
1169 -- No match found, not cancelled
1172 end Switch_Subsequently_Cancelled;