gcc/ada/switch-m.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             S W I T C H - M                              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2001-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  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.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 with Debug;    use Debug;
  27 with Makeutl;  use Makeutl;
  28 with Osint;    use Osint;
  29 with Opt;      use Opt;
  30 with Prj;      use Prj;
  31 with Prj.Ext;  use Prj.Ext;
  32 with Table;
  33
  34 package body Switch.M is
  35
  36    package Normalized_Switches is new Table.Table
  37      (Table_Component_Type => String_Access,
  38       Table_Index_Type     => Integer,
  39       Table_Low_Bound      => 1,
  40       Table_Initial        => 20,
  41       Table_Increment      => 100,
  42       Table_Name           => "Switch.M.Normalized_Switches");
  43    --  This table is used to keep the normalized switches, so that they may be
  44    --  reused for subsequent invocations of Normalize_Compiler_Switches with
  45    --  similar switches.
  46
  47    Initial_Number_Of_Switches : constant := 10;
  48
  49    Global_Switches : Argument_List_Access := null;
  50    --  Used by function Normalize_Compiler_Switches
  51
  52    ---------------------------------
  53    -- Normalize_Compiler_Switches --
  54    ---------------------------------
  55
  56    procedure Normalize_Compiler_Switches
  57      (Switch_Chars : String;
  58       Switches     : in out Argument_List_Access;
  59       Last         : out Natural)
  60    is
  61       Switch_Starts_With_Gnat : Boolean;
  62
  63       Ptr : Integer := Switch_Chars'First;
  64       Max : constant Integer := Switch_Chars'Last;
  65       C   : Character := ' ';
  66
  67       Storing      : String := Switch_Chars;
  68       First_Stored : Positive := Ptr + 1;
  69       Last_Stored  : Positive := First_Stored;
  70
  71       procedure Add_Switch_Component (S : String);
  72       --  Add a new String_Access component in Switches. If a string equal
  73       --  to S is already stored in the table Normalized_Switches, use it.
  74       --  Other wise add a new component to the table.
  75
  76       --------------------------
  77       -- Add_Switch_Component --
  78       --------------------------
  79
  80       procedure Add_Switch_Component (S : String) is
  81       begin
  82          --  If Switches is null, allocate a new array
  83
  84          if Switches = null then
  85             Switches := new Argument_List (1 .. Initial_Number_Of_Switches);
  86
  87          --  Otherwise, if Switches is full, extend it
  88
  89          elsif Last = Switches'Last then
  90             declare
  91                New_Switches : constant Argument_List_Access :=
  92                                 new Argument_List
  93                                       (1 .. Switches'Length + Switches'Length);
  94             begin
  95                New_Switches (1 .. Switches'Length) := Switches.all;
  96                Last := Switches'Length;
  97                Switches := New_Switches;
  98             end;
  99          end if;
 100
 101          --  If this is the first switch, Last designates the first component
 102
 103          if Last = 0 then
 104             Last := Switches'First;
 105          else
 106             Last := Last + 1;
 107          end if;
 108
 109          --  Look into the table Normalized_Switches for a similar string.
 110          --  If one is found, put it at the added component, and return.
 111
 112          for Index in 1 .. Normalized_Switches.Last loop
 113             if S = Normalized_Switches.Table (Index).all then
 114                Switches (Last) := Normalized_Switches.Table (Index);
 115                return;
 116             end if;
 117          end loop;
 118
 119          --  No string equal to S was found in the table Normalized_Switches.
 120          --  Add a new component in the table.
 121
 122          Switches (Last) := new String'(S);
 123          Normalized_Switches.Append (Switches (Last));
 124       end Add_Switch_Component;
 125
 126    --  Start of processing for Normalize_Compiler_Switches
 127
 128    begin
 129       Last := 0;
 130
 131       if Ptr = Max or else Switch_Chars (Ptr) /= '-' then
 132          return;
 133       end if;
 134
 135       Ptr := Ptr + 1;
 136
 137       Switch_Starts_With_Gnat :=
 138          Ptr + 3 <= Max and then Switch_Chars (Ptr .. Ptr + 3) = "gnat";
 139
 140       if Switch_Starts_With_Gnat then
 141          Ptr := Ptr + 4;
 142          First_Stored := Ptr;
 143       end if;
 144
 145       while Ptr <= Max loop
 146          C := Switch_Chars (Ptr);
 147
 148          --  Processing for a switch
 149
 150          case Switch_Starts_With_Gnat is
 151
 152             when False =>
 153
 154                --  All switches that don't start with -gnat stay as is,
 155                --  except -pg, -Wall, -k8, -w
 156
 157                if Switch_Chars = "-pg" or else Switch_Chars = "-p" then
 158
 159                   --  The gcc driver converts -pg to -p, so that is what
 160                   --  is stored in the ALI file.
 161
 162                   Add_Switch_Component ("-p");
 163
 164                elsif Switch_Chars = "-Wall" then
 165
 166                   --  The gcc driver adds -gnatwa when -Wall is used
 167
 168                   Add_Switch_Component ("-gnatwa");
 169                   Add_Switch_Component ("-Wall");
 170
 171                elsif Switch_Chars = "-k8" then
 172
 173                   --  The gcc driver transforms -k8 into -gnatk8
 174
 175                   Add_Switch_Component ("-gnatk8");
 176
 177                elsif Switch_Chars = "-w" then
 178
 179                   --  The gcc driver adds -gnatws when -w is used
 180
 181                   Add_Switch_Component ("-gnatws");
 182                   Add_Switch_Component ("-w");
 183
 184                elsif Switch_Chars'Length > 6
 185                  and then
 186                    Switch_Chars (Switch_Chars'First .. Switch_Chars'First + 5)
 187                                                              = "--RTS="
 188                then
 189                   Add_Switch_Component (Switch_Chars);
 190
 191                   --  When --RTS=mtp is used, the gcc driver adds -mrtp
 192
 193                   if Switch_Chars = "--RTS=mtp" then
 194                      Add_Switch_Component ("-mrtp");
 195                   end if;
 196
 197                --  Take only into account switches that are transmitted to
 198                --  gnat1 by the gcc driver and stored by gnat1 in the ALI file.
 199
 200                else
 201                   case C is
 202                      when 'O' | 'W' | 'w' | 'f' | 'd' | 'g' | 'm' =>
 203                         Add_Switch_Component (Switch_Chars);
 204
 205                      when others =>
 206                         null;
 207                   end case;
 208                end if;
 209
 210                return;
 211
 212             when True =>
 213
 214                case C is
 215
 216                   --  One-letter switches
 217
 218                   when 'a' | 'A' | 'b' | 'c' | 'D' | 'E' | 'f' |
 219                     'F' | 'g' | 'h' | 'H' | 'k' | 'l' | 'L' | 'n' | 'N' |
 220                     'o' | 'O' | 'p' | 'P' | 'q' | 'Q' | 'r' | 's' | 't' |
 221                     'u' | 'U' | 'v' | 'x' | 'X' | 'Z' =>
 222                      Storing (First_Stored) := C;
 223                      Add_Switch_Component
 224                        (Storing (Storing'First .. First_Stored));
 225                      Ptr := Ptr + 1;
 226
 227                   --  One-letter switches followed by a positive number
 228
 229                   when 'm' | 'T' =>
 230                      Storing (First_Stored) := C;
 231                      Last_Stored := First_Stored;
 232
 233                      loop
 234                         Ptr := Ptr + 1;
 235                         exit when Ptr > Max
 236                           or else Switch_Chars (Ptr) not in '0' .. '9';
 237                         Last_Stored := Last_Stored + 1;
 238                         Storing (Last_Stored) := Switch_Chars (Ptr);
 239                      end loop;
 240
 241                      Add_Switch_Component
 242                        (Storing (Storing'First .. Last_Stored));
 243
 244                   when 'd' =>
 245                      Storing (First_Stored) := 'd';
 246
 247                      while Ptr < Max loop
 248                         Ptr := Ptr + 1;
 249                         C := Switch_Chars (Ptr);
 250                         exit when C = ASCII.NUL or else C = '/'
 251                           or else C = '-';
 252
 253                         if C in '1' .. '9' or else
 254                            C in 'a' .. 'z' or else
 255                            C in 'A' .. 'Z'
 256                         then
 257                            Storing (First_Stored + 1) := C;
 258                            Add_Switch_Component
 259                              (Storing (Storing'First .. First_Stored + 1));
 260
 261                         else
 262                            Last := 0;
 263                            return;
 264                         end if;
 265                      end loop;
 266
 267                      return;
 268
 269                   when 'e' =>
 270
 271                      --  Store -gnateD, -gnatep= and -gnateG in the ALI file.
 272                      --  The other -gnate switches do not need to be stored.
 273
 274                      Storing (First_Stored) := 'e';
 275                      Ptr := Ptr + 1;
 276
 277                      if Ptr > Max
 278                        or else (Switch_Chars (Ptr) /= 'D'
 279                                  and then Switch_Chars (Ptr) /= 'G'
 280                                  and then Switch_Chars (Ptr) /= 'p')
 281                      then
 282                         Last := 0;
 283                         return;
 284                      end if;
 285
 286                      --  Processing for -gnateD
 287
 288                      if Switch_Chars (Ptr) = 'D' then
 289                         Storing (First_Stored + 1 ..
 290                                  First_Stored + Max - Ptr + 1) :=
 291                           Switch_Chars (Ptr .. Max);
 292                         Add_Switch_Component
 293                           (Storing (Storing'First ..
 294                                       First_Stored + Max - Ptr + 1));
 295
 296                      --  Processing for -gnatep=
 297
 298                      elsif Switch_Chars (Ptr) = 'p' then
 299                         Ptr := Ptr + 1;
 300
 301                         if Ptr = Max then
 302                            Last := 0;
 303                            return;
 304                         end if;
 305
 306                         if Switch_Chars (Ptr) = '=' then
 307                            Ptr := Ptr + 1;
 308                         end if;
 309
 310                         --  To normalize, always put a '=' after -gnatep.
 311                         --  Because that could lengthen the switch string,
 312                         --  declare a local variable.
 313
 314                         declare
 315                            To_Store : String (1 .. Max - Ptr + 9);
 316                         begin
 317                            To_Store (1 .. 8) := "-gnatep=";
 318                            To_Store (9 .. Max - Ptr + 9) :=
 319                              Switch_Chars (Ptr .. Max);
 320                            Add_Switch_Component (To_Store);
 321                         end;
 322
 323                      elsif Switch_Chars (Ptr) = 'G' then
 324                         Add_Switch_Component ("-gnateG");
 325                      end if;
 326
 327                      return;
 328
 329                   when 'i' =>
 330                      Storing (First_Stored) := 'i';
 331
 332                      Ptr := Ptr + 1;
 333
 334                      if Ptr > Max then
 335                         Last := 0;
 336                         return;
 337                      end if;
 338
 339                      C := Switch_Chars (Ptr);
 340
 341                      if C in '1' .. '5'
 342                        or else C = '8'
 343                        or else C = 'p'
 344                        or else C = 'f'
 345                        or else C = 'n'
 346                        or else C = 'w'
 347                      then
 348                         Storing (First_Stored + 1) := C;
 349                         Add_Switch_Component
 350                           (Storing (Storing'First .. First_Stored + 1));
 351                         Ptr := Ptr + 1;
 352
 353                      else
 354                         Last := 0;
 355                         return;
 356                      end if;
 357
 358                   --  -gnatR may be followed by '0', '1', '2' or '3',
 359                   --  then by 's'
 360
 361                   when 'R' =>
 362                      Last_Stored := First_Stored;
 363                      Storing (Last_Stored) := 'R';
 364                      Ptr := Ptr + 1;
 365
 366                      if Ptr <= Max
 367                        and then Switch_Chars (Ptr) in '0' .. '9'
 368                      then
 369                         C := Switch_Chars (Ptr);
 370
 371                         if C in '4' .. '9' then
 372                            Last := 0;
 373                            return;
 374
 375                         else
 376                            Last_Stored := Last_Stored + 1;
 377                            Storing (Last_Stored) := C;
 378                            Ptr := Ptr + 1;
 379
 380                            if Ptr <= Max
 381                              and then Switch_Chars (Ptr) = 's'
 382                            then
 383                               Last_Stored := Last_Stored + 1;
 384                               Storing (Last_Stored) := 's';
 385                               Ptr := Ptr + 1;
 386                            end if;
 387                         end if;
 388                      end if;
 389
 390                      Add_Switch_Component
 391                        (Storing (Storing'First .. Last_Stored));
 392
 393                   --  Multiple switches
 394
 395                   when 'V' | 'w' | 'y' =>
 396                      Storing (First_Stored) := C;
 397                      Ptr := Ptr + 1;
 398
 399                      if Ptr > Max then
 400                         if C = 'y' then
 401                            Add_Switch_Component
 402                              (Storing (Storing'First .. First_Stored));
 403
 404                         else
 405                            Last := 0;
 406                            return;
 407                         end if;
 408                      end if;
 409
 410                      --  Loop through remaining switch characters in string
 411
 412                      while Ptr <= Max loop
 413                         C := Switch_Chars (Ptr);
 414                         Ptr := Ptr + 1;
 415
 416                         --  -gnatyMxxx
 417
 418                         if C = 'M' and then Storing (First_Stored) = 'y' then
 419                            Last_Stored := First_Stored + 1;
 420                            Storing (Last_Stored) := 'M';
 421                            while Ptr <= Max loop
 422                               C := Switch_Chars (Ptr);
 423                               exit when C not in '0' .. '9';
 424                               Last_Stored := Last_Stored + 1;
 425                               Storing (Last_Stored) := C;
 426                               Ptr := Ptr + 1;
 427                            end loop;
 428
 429                            --  If there is no digit after -gnatyM,
 430                            --  the switch is invalid.
 431
 432                            if Last_Stored = First_Stored + 1 then
 433                               Last := 0;
 434                               return;
 435
 436                            else
 437                               Add_Switch_Component
 438                                 (Storing (Storing'First .. Last_Stored));
 439                            end if;
 440
 441                         --  --gnatx.x
 442
 443                         elsif C = '.' and then Ptr <= Max then
 444                            Storing (First_Stored + 1) := '.';
 445                            Storing (First_Stored + 2) := Switch_Chars (Ptr);
 446                            Ptr := Ptr + 1;
 447                            Add_Switch_Component
 448                              (Storing (Storing'First .. First_Stored + 2));
 449
 450                         --  All other switches are -gnatxx
 451
 452                         else
 453                            Storing (First_Stored + 1) := C;
 454                            Add_Switch_Component
 455                              (Storing (Storing'First .. First_Stored + 1));
 456                         end if;
 457                      end loop;
 458
 459                   --  -gnat95 -gnat05
 460
 461                   when '0' | '9' =>
 462                      Last_Stored := First_Stored;
 463                      Storing (Last_Stored) := C;
 464                      Ptr := Ptr + 1;
 465
 466                      if Ptr /= Max or else Switch_Chars (Ptr) /= '5' then
 467
 468                         --  Invalid switch
 469
 470                         Last := 0;
 471                         return;
 472
 473                      else
 474                         Last_Stored := Last_Stored + 1;
 475                         Storing (Last_Stored) := '5';
 476                         Add_Switch_Component
 477                           (Storing (Storing'First .. Last_Stored));
 478                         Ptr := Ptr + 1;
 479                      end if;
 480
 481                   --  -gnat83
 482
 483                   when '8' =>
 484                      Last_Stored := First_Stored;
 485                      Storing (Last_Stored) := '8';
 486                      Ptr := Ptr + 1;
 487
 488                      if Ptr /= Max or else Switch_Chars (Ptr) /= '3' then
 489
 490                         --  Invalid switch
 491
 492                         Last := 0;
 493                         return;
 494
 495                      else
 496                         Last_Stored := Last_Stored + 1;
 497                         Storing (Last_Stored) := '3';
 498                         Add_Switch_Component
 499                           (Storing (Storing'First .. Last_Stored));
 500                         Ptr := Ptr + 1;
 501                      end if;
 502
 503                   --  Not a valid switch
 504
 505                   when others =>
 506                      Last := 0;
 507                      return;
 508
 509                end case;
 510
 511          end case;
 512       end loop;
 513    end Normalize_Compiler_Switches;
 514
 515    function Normalize_Compiler_Switches
 516      (Switch_Chars : String) return Argument_List
 517    is
 518       Last : Natural;
 519
 520    begin
 521       Normalize_Compiler_Switches (Switch_Chars, Global_Switches, Last);
 522
 523       if Last = 0 then
 524          return (1 .. 0 => null);
 525       else
 526          return Global_Switches (Global_Switches'First .. Last);
 527       end if;
 528    end Normalize_Compiler_Switches;
 529
 530    ------------------------
 531    -- Scan_Make_Switches --
 532    ------------------------
 533
 534    procedure Scan_Make_Switches
 535      (Project_Node_Tree : Prj.Tree.Project_Node_Tree_Ref;
 536       Switch_Chars      : String;
 537       Success           : out Boolean)
 538    is
 539       Ptr : Integer          := Switch_Chars'First;
 540       Max : constant Integer := Switch_Chars'Last;
 541       C   : Character        := ' ';
 542
 543    begin
 544       --  Assume a good switch
 545
 546       Success := True;
 547
 548       --  Skip past the initial character (must be the switch character)
 549
 550       if Ptr = Max then
 551          Bad_Switch (Switch_Chars);
 552
 553       else
 554          Ptr := Ptr + 1;
 555       end if;
 556
 557       --  A little check, "gnat" at the start of a switch is for the compiler
 558
 559       if Switch_Chars'Length >= Ptr + 3
 560         and then Switch_Chars (Ptr .. Ptr + 3) = "gnat"
 561       then
 562          Success := False;
 563          return;
 564       end if;
 565
 566       C := Switch_Chars (Ptr);
 567
 568       --  Multiple character switches
 569
 570       if Switch_Chars'Length > 2 then
 571          if Switch_Chars = "--create-missing-dirs" then
 572             Setup_Projects := True;
 573
 574          elsif Switch_Chars'Length > Subdirs_Option'Length
 575            and then
 576              Switch_Chars
 577                (Switch_Chars'First ..
 578                 Switch_Chars'First + Subdirs_Option'Length - 1) =
 579                                                             Subdirs_Option
 580          then
 581             Subdirs :=
 582               new String'
 583                 (Switch_Chars
 584                   (Switch_Chars'First + Subdirs_Option'Length ..
 585                    Switch_Chars'Last));
 586
 587          elsif Switch_Chars (Ptr) = '-' then
 588             Bad_Switch (Switch_Chars);
 589
 590          elsif Switch_Chars'Length > 3
 591            and then Switch_Chars (Ptr .. Ptr + 1) = "aP"
 592          then
 593             Add_Search_Project_Directory
 594               (Project_Node_Tree,
 595                Switch_Chars (Ptr + 2 .. Switch_Chars'Last));
 596
 597          elsif C = 'v' and then Switch_Chars'Length = 3 then
 598             Ptr := Ptr + 1;
 599             Verbose_Mode := True;
 600
 601             case Switch_Chars (Ptr) is
 602                when 'l' =>
 603                   Verbosity_Level := Opt.Low;
 604
 605                when 'm' =>
 606                   Verbosity_Level := Opt.Medium;
 607
 608                when 'h' =>
 609                   Verbosity_Level := Opt.High;
 610
 611                when others =>
 612                   Success := False;
 613             end case;
 614
 615          elsif C = 'd' then
 616
 617             --  Note: for the debug switch, the remaining characters in this
 618             --  switch field must all be debug flags, since all valid switch
 619             --  characters are also valid debug characters. This switch is not
 620             --  documented on purpose because it is only used by the
 621             --  implementors.
 622
 623             --  Loop to scan out debug flags
 624
 625             while Ptr < Max loop
 626                Ptr := Ptr + 1;
 627                C := Switch_Chars (Ptr);
 628
 629                if C in 'a' .. 'z' or else C in 'A' .. 'Z' then
 630                   Set_Debug_Flag (C);
 631                else
 632                   Bad_Switch (Switch_Chars);
 633                end if;
 634             end loop;
 635
 636          elsif C = 'e' then
 637             Ptr := Ptr + 1;
 638
 639             case Switch_Chars (Ptr) is
 640
 641                --  Processing for eI switch
 642
 643                when 'I' =>
 644                   Ptr := Ptr + 1;
 645                   Scan_Pos (Switch_Chars, Max, Ptr, Main_Index, C);
 646
 647                   if Ptr <= Max then
 648                      Bad_Switch (Switch_Chars);
 649                   end if;
 650
 651                --  Processing for eL switch
 652
 653                when 'L' =>
 654                   if Ptr /= Max then
 655                      Bad_Switch (Switch_Chars);
 656
 657                   else
 658                      Follow_Links_For_Files := True;
 659                      Follow_Links_For_Dirs  := True;
 660                   end if;
 661
 662                --  Processing for eS switch
 663
 664                when 'S' =>
 665                   if Ptr /= Max then
 666                      Bad_Switch (Switch_Chars);
 667
 668                   else
 669                      Commands_To_Stdout := True;
 670                   end if;
 671
 672                when others =>
 673                   Bad_Switch (Switch_Chars);
 674             end case;
 675
 676          elsif C = 'j' then
 677             Ptr := Ptr + 1;
 678
 679             declare
 680                Max_Proc : Pos;
 681             begin
 682                Scan_Pos (Switch_Chars, Max, Ptr, Max_Proc, C);
 683
 684                if Ptr <= Max then
 685                   Bad_Switch (Switch_Chars);
 686
 687                else
 688                   Maximum_Processes := Positive (Max_Proc);
 689                end if;
 690             end;
 691
 692          elsif C = 'w' and then Switch_Chars'Length = 3 then
 693             Ptr := Ptr + 1;
 694
 695             if Switch_Chars = "-we" then
 696                Warning_Mode := Treat_As_Error;
 697
 698             elsif Switch_Chars = "-wn" then
 699                Warning_Mode := Normal;
 700
 701             elsif Switch_Chars = "-ws" then
 702                Warning_Mode  := Suppress;
 703
 704             else
 705                Success := False;
 706             end if;
 707
 708          else
 709             Success := False;
 710          end if;
 711
 712       --  Single-character switches
 713
 714       else
 715          Check_Switch : begin
 716
 717             case C is
 718
 719                when 'a' =>
 720                   Check_Readonly_Files := True;
 721
 722                --  Processing for b switch
 723
 724                when 'b' =>
 725                   Bind_Only  := True;
 726                   Make_Steps := True;
 727
 728                --  Processing for B switch
 729
 730                when 'B' =>
 731                   Build_Bind_And_Link_Full_Project := True;
 732
 733                --  Processing for c switch
 734
 735                when 'c' =>
 736                   Compile_Only := True;
 737                   Make_Steps   := True;
 738
 739                --  Processing for C switch
 740
 741                when 'C' =>
 742                   Create_Mapping_File := True;
 743
 744                --  Processing for D switch
 745
 746                when 'D' =>
 747                   if Object_Directory_Present then
 748                      Osint.Fail ("duplicate -D switch");
 749
 750                   else
 751                      Object_Directory_Present := True;
 752                   end if;
 753
 754                --  Processing for f switch
 755
 756                when 'f' =>
 757                   Force_Compilations := True;
 758
 759                --  Processing for F switch
 760
 761                when 'F' =>
 762                   Full_Path_Name_For_Brief_Errors := True;
 763
 764                --  Processing for h switch
 765
 766                when 'h' =>
 767                   Usage_Requested := True;
 768
 769                --  Processing for i switch
 770
 771                when 'i' =>
 772                   In_Place_Mode := True;
 773
 774                --  Processing for j switch
 775
 776                when 'j' =>
 777                   --  -j not followed by a number is an error
 778
 779                   Bad_Switch (Switch_Chars);
 780
 781                --  Processing for k switch
 782
 783                when 'k' =>
 784                   Keep_Going := True;
 785
 786                --  Processing for l switch
 787
 788                when 'l' =>
 789                   Link_Only  := True;
 790                   Make_Steps := True;
 791
 792                --  Processing for M switch
 793
 794                when 'M' =>
 795                   List_Dependencies := True;
 796
 797                --  Processing for n switch
 798
 799                when 'n' =>
 800                   Do_Not_Execute := True;
 801
 802                --  Processing for o switch
 803
 804                when 'o' =>
 805                   if Output_File_Name_Present then
 806                      Osint.Fail ("duplicate -o switch");
 807                   else
 808                      Output_File_Name_Present := True;
 809                   end if;
 810
 811                --  Processing for p switch
 812
 813                when 'p' =>
 814                   Setup_Projects := True;
 815
 816                --  Processing for q switch
 817
 818                when 'q' =>
 819                   Quiet_Output := True;
 820
 821                --  Processing for R switch
 822
 823                when 'R' =>
 824                   Run_Path_Option := False;
 825
 826                --  Processing for s switch
 827
 828                when 's' =>
 829                   Ptr := Ptr + 1;
 830                   Check_Switches := True;
 831
 832                --  Processing for v switch
 833
 834                when 'v' =>
 835                   Verbose_Mode := True;
 836                   Verbosity_Level := Opt.High;
 837
 838                   --  Processing for x switch
 839
 840                when 'x' =>
 841                   External_Unit_Compilation_Allowed := True;
 842
 843                   --  Processing for z switch
 844
 845                when 'z' =>
 846                   No_Main_Subprogram := True;
 847
 848                   --  Any other small letter is an illegal switch
 849
 850                when others =>
 851                   if C in 'a' .. 'z' then
 852                      Bad_Switch (Switch_Chars);
 853
 854                   else
 855                      Success := False;
 856                   end if;
 857
 858             end case;
 859          end Check_Switch;
 860       end if;
 861    end Scan_Make_Switches;
 862
 863 end Switch.M;