1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2001-2003 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with GNAT.OS_Lib; use GNAT.OS_Lib;
29 with Debug; use Debug;
31 with Osint; use Osint;
33 with Prepcomp; use Prepcomp;
34 with Types; use Types;
35 with Validsw; use Validsw;
36 with Stylesw; use Stylesw;
38 with System.WCh_Con; use System.WCh_Con;
40 package body Switch.C is
42 RTS_Specified : String_Access := null;
43 -- Used to detect multiple use of --RTS= flag
45 -----------------------------
46 -- Scan_Front_End_Switches --
47 -----------------------------
49 procedure Scan_Front_End_Switches (Switch_Chars : String) is
50 Switch_Starts_With_Gnat : Boolean;
51 -- True if first four switch characters are "gnat"
53 First_Switch : Boolean := True;
54 -- False for all but first switch
56 Ptr : Integer := Switch_Chars'First;
57 Max : constant Integer := Switch_Chars'Last;
61 Store_Switch : Boolean := True;
62 First_Char : Integer := Ptr;
63 Storing : String := Switch_Chars;
64 First_Stored : Positive := Ptr + 1;
65 -- The above need comments ???
68 -- Skip past the initial character (must be the switch character)
76 -- Remove "gnat" from the switch, if present
78 Switch_Starts_With_Gnat :=
79 Ptr + 3 <= Max and then Switch_Chars (Ptr .. Ptr + 3) = "gnat";
81 if Switch_Starts_With_Gnat then
86 -- Loop to scan through switches given in switch string
91 C := Switch_Chars (Ptr);
93 -- Processing for a switch
95 case Switch_Starts_With_Gnat is
99 -- There are only two front-end switches that
100 -- do not start with -gnat, namely -I and --RTS
102 if Switch_Chars (Ptr) = 'I' then
103 Store_Switch := False;
111 -- Find out whether this is a -I- or regular -Ixxx switch
113 if Ptr = Max and then Switch_Chars (Ptr) = '-' then
114 Look_In_Primary_Dir := False;
117 Add_Src_Search_Dir (Switch_Chars (Ptr .. Max));
122 -- Processing of the --RTS switch. --RTS has been modified by
123 -- gcc and is now of the form -fRTS
126 and then Switch_Chars (Ptr .. Ptr + 3) = "fRTS"
131 or else Switch_Chars (Ptr + 3) /= '='
133 Osint.Fail ("missing path for --RTS");
135 -- Check that this is the first time --RTS is specified
136 -- or if it is not the first time, the same path has
139 if RTS_Specified = null then
141 new String'(Switch_Chars (Ptr + 4 .. Max));
144 RTS_Specified.all /= Switch_Chars (Ptr + 4 .. Max)
147 ("--RTS cannot be specified multiple times");
150 -- Valid --RTS switch
152 Opt.No_Stdinc := True;
153 Opt.RTS_Switch := True;
155 RTS_Src_Path_Name := Get_RTS_Search_Dir
156 (Switch_Chars (Ptr + 4 .. Max),
158 RTS_Lib_Path_Name := Get_RTS_Search_Dir
159 (Switch_Chars (Ptr + 4 .. Max),
162 if RTS_Src_Path_Name /= null and then
163 RTS_Lib_Path_Name /= null
167 elsif RTS_Src_Path_Name = null and then
168 RTS_Lib_Path_Name = null
170 Osint.Fail ("RTS path not valid: missing " &
171 "adainclude and adalib directories");
173 elsif RTS_Src_Path_Name = null then
174 Osint.Fail ("RTS path not valid: missing " &
175 "adainclude directory");
177 elsif RTS_Lib_Path_Name = null then
178 Osint.Fail ("RTS path not valid: missing " &
188 -- Process -gnat* options
194 Assertions_Enabled := True;
196 -- Processing for A switch
200 Config_File := False;
202 -- Processing for b switch
206 Brief_Output := True;
208 -- Processing for c switch
211 if not First_Switch then
213 ("-gnatc must be first if combined with other switches");
217 Operating_Mode := Check_Semantics;
223 -- Processing for d switch
226 Store_Switch := False;
227 Storing (First_Stored) := 'd';
230 -- Note: for the debug switch, the remaining characters in this
231 -- switch field must all be debug flags, since all valid switch
232 -- characters are also valid debug characters.
234 -- Loop to scan out debug flags
238 C := Switch_Chars (Ptr);
239 exit when C = ASCII.NUL or else C = '/' or else C = '-';
241 if C in '1' .. '9' or else
242 C in 'a' .. 'z' or else
246 Set_Dotted_Debug_Flag (C);
247 Storing (First_Stored + 1) := '.';
248 Storing (First_Stored + 2) := C;
249 Store_Compilation_Switch
250 (Storing (Storing'First .. First_Stored + 2));
255 Storing (First_Stored + 1) := C;
256 Store_Compilation_Switch
257 (Storing (Storing'First .. First_Stored + 1));
268 -- Make sure Zero_Cost_Exceptions is set if gnatdX set. This
269 -- is for backwards compatibility with old versions and usage.
271 if Debug_Flag_XX then
272 Zero_Cost_Exceptions_Set := True;
273 Zero_Cost_Exceptions_Val := True;
278 -- Processing for D switch
283 -- Note: -gnatD also sets -gnatx (to turn off cross-reference
284 -- generation in the ali file) since otherwise this generation
285 -- gets confused by the "wrong" Sloc values put in the tree.
287 Debug_Generated_Code := True;
288 Xref_Active := False;
289 Set_Debug_Flag ('g');
291 -- Processing for e switch
294 -- Only -gnateD and -gnatep= are stored
302 case Switch_Chars (Ptr) is
304 -- Configuration pragmas
307 Store_Switch := False;
310 -- There may be an equal sign between -gnatec and
311 -- the path name of the config file.
313 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
322 Config_File_Name : constant String_Access :=
324 (Switch_Chars (Ptr .. Max));
327 if Config_File_Names = null then
329 new String_List'(1 => Config_File_Name);
333 New_Names : constant String_List_Access :=
336 Config_File_Names'Length + 1);
339 for Index in Config_File_Names'Range loop
341 Config_File_Names (Index);
342 Config_File_Names (Index) := null;
345 New_Names (New_Names'Last) := Config_File_Name;
346 Free (Config_File_Names);
347 Config_File_Names := New_Names;
357 Store_Switch := False;
364 Add_Symbol_Definition (Switch_Chars (Ptr .. Max));
368 Storing (First_Stored .. First_Stored + 1) := "eD";
370 (First_Stored + 2 .. First_Stored + Max - Ptr + 2) :=
371 Switch_Chars (Ptr .. Max);
372 Store_Compilation_Switch (Storing
373 (Storing'First .. First_Stored + Max - Ptr + 2));
376 -- Full source path for brief error messages
379 Store_Switch := False;
381 Full_Path_Name_For_Brief_Errors := True;
387 Store_Switch := False;
390 -- There may be an equal sign between -gnatem and
391 -- the path name of the mapping file.
393 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
402 new String'(Switch_Chars (Ptr .. Max));
405 -- Preprocessing data file
408 Store_Switch := False;
411 -- There may be an equal sign between -gnatep and
412 -- the path name of the mapping file.
414 if Ptr <= Max and then Switch_Chars (Ptr) = '=' then
422 Preprocessing_Data_File :=
423 new String'(Switch_Chars (Ptr .. Max));
426 -- Because we may store a longer switch (we normalize
427 -- to -gnatep=), use a local variable.
431 (1 .. Preprocessing_Data_File'Length + 8);
434 To_Store (1 .. 8) := "-gnatep=";
435 To_Store (9 .. Preprocessing_Data_File'Length + 8) :=
436 Preprocessing_Data_File.all;
437 Store_Compilation_Switch (To_Store);
446 -- Processing for E switch
450 Dynamic_Elaboration_Checks := True;
452 -- Processing for f switch
456 All_Errors_Mode := True;
458 -- Processing for F switch
462 External_Name_Exp_Casing := Uppercase;
463 External_Name_Imp_Casing := Uppercase;
465 -- Processing for g switch
470 Identifier_Character_Set := 'n';
471 Warning_Mode := Treat_As_Error;
472 Check_Unreferenced := True;
474 Check_Unreferenced_Formals := True;
475 System_Extend_Unit := Empty;
477 Set_Default_Style_Check_Options;
479 -- Processing for G switch
483 Print_Generated_Code := True;
485 -- Processing for h switch
489 Usage_Requested := True;
491 -- Processing for H switch
497 -- Processing for i switch
505 C := Switch_Chars (Ptr);
515 Identifier_Character_Set := C;
522 -- Processing for k switch
526 Scan_Pos (Switch_Chars, Max, Ptr, Maximum_File_Name_Length);
528 -- Processing for l switch
534 -- Processing for L switch
538 Zero_Cost_Exceptions_Set := True;
539 Zero_Cost_Exceptions_Val := False;
541 -- Processing for m switch
545 Scan_Pos (Switch_Chars, Max, Ptr, Maximum_Errors);
547 -- Processing for n switch
551 Inline_Active := True;
553 -- Processing for N switch
557 Inline_Active := True;
558 Front_End_Inlining := True;
560 -- Processing for o switch
564 Suppress_Options (Overflow_Check) := False;
565 Opt.Enable_Overflow_Checks := True;
567 -- Processing for O switch
570 Store_Switch := False;
572 Output_File_Name_Present := True;
574 -- Processing for p switch
578 Suppress_Options := (others => True);
579 Validity_Checks_On := False;
580 Opt.Suppress_Checks := True;
581 Opt.Enable_Overflow_Checks := False;
583 -- Processing for P switch
587 Polling_Required := True;
589 -- Processing for q switch
593 Try_Semantics := True;
595 -- Processing for q switch
599 Force_ALI_Tree_File := True;
600 Try_Semantics := True;
602 -- Processing for R switch
606 Back_Annotate_Rep_Info := True;
607 List_Representation_Info := 1;
609 while Ptr <= Max loop
610 C := Switch_Chars (Ptr);
612 if C in '1' .. '3' then
613 List_Representation_Info :=
614 Character'Pos (C) - Character'Pos ('0');
616 elsif Switch_Chars (Ptr) = 's' then
617 List_Representation_Info_To_File := True;
619 elsif Switch_Chars (Ptr) = 'm' then
620 List_Representation_Info_Mechanisms := True;
629 -- Processing for s switch
632 if not First_Switch then
634 ("-gnats must be first if combined with other switches");
638 Operating_Mode := Check_Syntax;
640 -- Processing for t switch
646 if Operating_Mode = Check_Semantics then
650 Back_Annotate_Rep_Info := True;
652 -- Processing for T switch
656 Scan_Pos (Switch_Chars, Max, Ptr, Table_Factor);
658 -- Processing for u switch
664 -- Processing for U switch
668 Unique_Error_Tag := True;
670 -- Processing for v switch
674 Verbose_Mode := True;
676 -- Processing for V switch
679 Store_Switch := False;
680 Storing (First_Stored) := 'V';
691 Set_Validity_Check_Options
692 (Switch_Chars (Ptr .. Max), OK, Ptr);
698 for Index in First_Char + 1 .. Max loop
699 Storing (First_Stored + 1) :=
700 Switch_Chars (Index);
701 Store_Compilation_Switch
702 (Storing (Storing'First .. First_Stored + 1));
709 -- Processing for w switch
712 Store_Switch := False;
713 Storing (First_Stored) := 'w';
720 while Ptr <= Max loop
721 C := Switch_Chars (Ptr);
725 Check_Unreferenced := True;
726 Check_Unreferenced_Formals := True;
728 Constant_Condition_Warnings := True;
729 Implementation_Unit_Warnings := True;
730 Ineffective_Inline_Warnings := True;
731 Warn_On_Constant := True;
732 Warn_On_Export_Import := True;
733 Warn_On_Modified_Unread := True;
734 Warn_On_No_Value_Assigned := True;
735 Warn_On_Obsolescent_Feature := True;
736 Warn_On_Redundant_Constructs := True;
737 Warn_On_Unchecked_Conversion := True;
738 Warn_On_Unrecognized_Pragma := True;
741 Check_Unreferenced := False;
742 Check_Unreferenced_Formals := False;
743 Check_Withs := False;
744 Constant_Condition_Warnings := False;
745 Elab_Warnings := False;
746 Implementation_Unit_Warnings := False;
747 Ineffective_Inline_Warnings := False;
748 Warn_On_Constant := False;
749 Warn_On_Dereference := False;
750 Warn_On_Export_Import := False;
751 Warn_On_Hiding := False;
752 Warn_On_Modified_Unread := False;
753 Warn_On_No_Value_Assigned := False;
754 Warn_On_Obsolescent_Feature := False;
755 Warn_On_Redundant_Constructs := False;
756 Warn_On_Unchecked_Conversion := False;
757 Warn_On_Unrecognized_Pragma := False;
760 Constant_Condition_Warnings := True;
763 Constant_Condition_Warnings := False;
766 Warn_On_Dereference := True;
769 Warn_On_Dereference := False;
772 Warning_Mode := Treat_As_Error;
775 Check_Unreferenced_Formals := True;
778 Check_Unreferenced_Formals := False;
781 Warn_On_Unrecognized_Pragma := True;
784 Warn_On_Unrecognized_Pragma := False;
787 Warn_On_Hiding := True;
790 Warn_On_Hiding := False;
793 Implementation_Unit_Warnings := True;
796 Implementation_Unit_Warnings := False;
799 Warn_On_Obsolescent_Feature := True;
802 Warn_On_Obsolescent_Feature := False;
805 Warn_On_Constant := True;
808 Warn_On_Constant := False;
811 Elab_Warnings := True;
814 Elab_Warnings := False;
817 Warn_On_Modified_Unread := True;
820 Warn_On_Modified_Unread := False;
823 Warning_Mode := Normal;
826 Address_Clause_Overlay_Warnings := True;
829 Address_Clause_Overlay_Warnings := False;
832 Ineffective_Inline_Warnings := True;
835 Ineffective_Inline_Warnings := False;
838 Warn_On_Redundant_Constructs := True;
841 Warn_On_Redundant_Constructs := False;
844 Warning_Mode := Suppress;
847 Check_Unreferenced := True;
849 Check_Unreferenced_Formals := True;
852 Check_Unreferenced := False;
853 Check_Withs := False;
854 Check_Unreferenced_Formals := False;
857 Warn_On_No_Value_Assigned := True;
860 Warn_On_No_Value_Assigned := False;
863 Warn_On_Export_Import := True;
866 Warn_On_Export_Import := False;
869 Warn_On_Unchecked_Conversion := True;
872 Warn_On_Unchecked_Conversion := False;
874 -- Allow and ignore 'w' so that the old
875 -- format (e.g. -gnatwuwl) will work.
885 Storing (First_Stored + 1) := C;
886 Store_Compilation_Switch
887 (Storing (Storing'First .. First_Stored + 1));
895 -- Processing for W switch
904 for J in WC_Encoding_Method loop
905 if Switch_Chars (Ptr) = WC_Encoding_Letters (J) then
906 Wide_Character_Encoding_Method := J;
909 elsif J = WC_Encoding_Method'Last then
914 Upper_Half_Encoding :=
915 Wide_Character_Encoding_Method in
916 WC_Upper_Half_Encoding_Method;
920 -- Processing for x switch
924 Xref_Active := False;
926 -- Processing for X switch
930 Extensions_Allowed := True;
932 -- Processing for y switch
938 Set_Default_Style_Check_Options;
941 Store_Switch := False;
942 Storing (First_Stored) := 'y';
946 Last_Stored : Integer;
949 Set_Style_Check_Options
950 (Switch_Chars (Ptr .. Max), OK, Ptr);
956 Ptr := First_Char + 1;
958 while Ptr <= Max loop
959 Last_Stored := First_Stored + 1;
960 Storing (Last_Stored) := Switch_Chars (Ptr);
962 if Switch_Chars (Ptr) = 'M' then
966 or else Switch_Chars (Ptr) not in '0' .. '9';
967 Last_Stored := Last_Stored + 1;
968 Storing (Last_Stored) := Switch_Chars (Ptr);
975 Store_Compilation_Switch
976 (Storing (Storing'First .. Last_Stored));
981 -- Processing for z switch
986 -- Allowed for compiler only if this is the only
987 -- -z switch, we do not allow multiple occurrences
989 if Distribution_Stub_Mode = No_Stubs then
990 case Switch_Chars (Ptr) is
992 Distribution_Stub_Mode := Generate_Receiver_Stub_Body;
995 Distribution_Stub_Mode := Generate_Caller_Stub_Body;
1005 -- Processing for Z switch
1009 Zero_Cost_Exceptions_Set := True;
1010 Zero_Cost_Exceptions_Val := True;
1012 -- Processing for 83 switch
1022 if Switch_Chars (Ptr) /= '3' then
1030 -- Ignore extra switch character
1035 -- Anything else is an error (illegal switch character)
1042 if Store_Switch then
1043 Storing (First_Stored .. First_Stored + Ptr - First_Char - 1) :=
1044 Switch_Chars (First_Char .. Ptr - 1);
1045 Store_Compilation_Switch
1046 (Storing (Storing'First .. First_Stored + Ptr - First_Char - 1));
1049 First_Switch := False;
1054 Osint.Fail ("invalid switch: ", (1 => C));
1056 when Bad_Switch_Value =>
1057 Osint.Fail ("numeric value out of range for switch: ", (1 => C));
1059 when Missing_Switch_Value =>
1060 Osint.Fail ("missing numeric value for switch: ", (1 => C));
1062 end Scan_Front_End_Switches;