mcs/mcs/settings.cs

   1 //
   2 // settings.cs: All compiler settings
   3 //
   4 // Author: Miguel de Icaza (miguel@ximian.com)
   5 //            Ravi Pratap  (ravi@ximian.com)
   6 //            Marek Safar  (marek.safar@gmail.com)
   7 //
   8 //
   9 // Dual licensed under the terms of the MIT X11 or GNU GPL
  10 //
  11 // Copyright 2001 Ximian, Inc (http://www.ximian.com)
  12 // Copyright 2004-2008 Novell, Inc
  13 // Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
  14 //
  15
  16 using System.Collections.Generic;
  17 using System.IO;
  18 using System.Text;
  19 using System.Globalization;
  20 using System;
  21
  22 namespace Mono.CSharp {
  23
  24         public enum LanguageVersion
  25         {
  26                 ISO_1 = 1,
  27                 ISO_2 = 2,
  28                 V_3 = 3,
  29                 V_4 = 4,
  30                 V_5 = 5,
  31                 Future = 100,
  32
  33                 Default = LanguageVersion.V_5,
  34         }
  35
  36         public enum RuntimeVersion
  37         {
  38                 v1,
  39                 v2,
  40                 v4
  41         }
  42
  43         public enum Target
  44         {
  45                 Library, Exe, Module, WinExe
  46         }
  47
  48         public enum Platform
  49         {
  50                 AnyCPU,
  51                 AnyCPU32Preferred,
  52                 Arm,
  53                 X86,
  54                 X64,
  55                 IA64
  56         }
  57
  58         public class CompilerSettings
  59         {
  60                 public Target Target;
  61                 public Platform Platform;
  62                 public string TargetExt;
  63                 public bool VerifyClsCompliance;
  64                 public bool Optimize;
  65                 public LanguageVersion Version;
  66                 public bool EnhancedWarnings;
  67                 public bool LoadDefaultReferences;
  68                 public string SdkVersion;
  69
  70                 public string StrongNameKeyFile;
  71                 public string StrongNameKeyContainer;
  72                 public bool StrongNameDelaySign;
  73
  74                 public int TabSize;
  75
  76                 public bool WarningsAreErrors;
  77                 public int WarningLevel;
  78
  79                 //
  80                 // Assemblies references to be loaded
  81                 //
  82                 public List<string> AssemblyReferences;
  83
  84                 //
  85                 // External aliases for assemblies
  86                 //
  87                 public List<Tuple<string, string>> AssemblyReferencesAliases;
  88
  89                 //
  90                 // Modules to be embedded
  91                 //
  92                 public List<string> Modules;
  93
  94                 //
  95                 // Lookup paths for referenced assemblies
  96                 //
  97                 public List<string> ReferencesLookupPaths;
  98
  99                 //
 100                 // Encoding.
 101                 //
 102                 public Encoding Encoding;
 103
 104                 //
 105                 // If set, enable XML documentation generation
 106                 //
 107                 public string DocumentationFile;
 108
 109                 public string MainClass;
 110
 111                 //
 112                 // Output file
 113                 //
 114                 public string OutputFile;
 115
 116                 //
 117                 // The default compiler checked state
 118                 //
 119                 public bool Checked;
 120
 121                 //
 122                 // If true, the compiler is operating in statement mode,
 123                 // this currently turns local variable declaration into
 124                 // static variables of a class
 125                 //
 126                 public bool StatementMode;      // TODO: SUPER UGLY
 127
 128                 //
 129                 // Whether to allow Unsafe code
 130                 //
 131                 public bool Unsafe;
 132
 133                 public string Win32ResourceFile;
 134                 public string Win32IconFile;
 135
 136                 //
 137                 // A list of resource files for embedding
 138                 //
 139                 public List<AssemblyResource> Resources;
 140
 141                 public bool GenerateDebugInfo;
 142
 143                 #region Compiler debug flags only
 144                 public bool ParseOnly, TokenizeOnly, Timestamps;
 145                 public int DebugFlags;
 146                 public int VerboseParserFlag;
 147                 public int FatalCounter;
 148                 public bool Stacktrace;
 149                 #endregion
 150
 151                 public bool ShowFullPaths;
 152
 153                 //
 154                 // Whether we are being linked against the standard libraries.
 155                 // This is only used to tell whether `System.Object' should
 156                 // have a base class or not.
 157                 //
 158                 public bool StdLib;
 159
 160                 public RuntimeVersion StdLibRuntimeVersion;
 161
 162                 readonly List<string> conditional_symbols;
 163
 164                 readonly List<SourceFile> source_files;
 165
 166                 List<int> warnings_as_error;
 167                 List<int> warnings_only;
 168                 HashSet<int> warning_ignore_table;
 169
 170                 public CompilerSettings ()
 171                 {
 172                         StdLib = true;
 173                         Target = Target.Exe;
 174                         TargetExt = ".exe";
 175                         Platform = Platform.AnyCPU;
 176                         Version = LanguageVersion.Default;
 177                         VerifyClsCompliance = true;
 178                         Encoding = Encoding.UTF8;
 179                         LoadDefaultReferences = true;
 180                         StdLibRuntimeVersion = RuntimeVersion.v4;
 181                         WarningLevel = 4;
 182
 183                         if (Environment.OSVersion.Platform == PlatformID.Win32NT)
 184                                 TabSize = 4;
 185                         else
 186                                 TabSize = 8;
 187
 188                         AssemblyReferences = new List<string> ();
 189                         AssemblyReferencesAliases = new List<Tuple<string, string>> ();
 190                         Modules = new List<string> ();
 191                         ReferencesLookupPaths = new List<string> ();
 192
 193                         conditional_symbols = new List<string> ();
 194                         //
 195                         // Add default mcs define
 196                         //
 197                         conditional_symbols.Add ("__MonoCS__");
 198
 199                         source_files = new List<SourceFile> ();
 200                 }
 201
 202                 #region Properties
 203
 204                 public SourceFile FirstSourceFile {
 205                         get {
 206                                 return source_files.Count > 0 ? source_files [0] : null;
 207                         }
 208                 }
 209
 210                 public bool HasKeyFileOrContainer {
 211                         get {
 212                                 return StrongNameKeyFile != null || StrongNameKeyContainer != null;
 213                         }
 214                 }
 215
 216                 public bool NeedsEntryPoint {
 217                         get {
 218                                 return Target == Target.Exe || Target == Target.WinExe;
 219                         }
 220                 }
 221
 222                 public List<SourceFile> SourceFiles {
 223                         get {
 224                                 return source_files;
 225                         }
 226                 }
 227
 228                 #endregion
 229
 230                 public void AddConditionalSymbol (string symbol)
 231                 {
 232                         if (!conditional_symbols.Contains (symbol))
 233                                 conditional_symbols.Add (symbol);
 234                 }
 235
 236                 public void AddWarningAsError (int id)
 237                 {
 238                         if (warnings_as_error == null)
 239                                 warnings_as_error = new List<int> ();
 240
 241                         warnings_as_error.Add (id);
 242                 }
 243
 244                 public void AddWarningOnly (int id)
 245                 {
 246                         if (warnings_only == null)
 247                                 warnings_only = new List<int> ();
 248
 249                         warnings_only.Add (id);
 250                 }
 251
 252                 public bool IsConditionalSymbolDefined (string symbol)
 253                 {
 254                         return conditional_symbols.Contains (symbol);
 255                 }
 256
 257                 public bool IsWarningAsError (int code)
 258                 {
 259                         bool is_error = WarningsAreErrors;
 260
 261                         // Check specific list
 262                         if (warnings_as_error != null)
 263                                 is_error |= warnings_as_error.Contains (code);
 264
 265                         // Ignore excluded warnings
 266                         if (warnings_only != null && warnings_only.Contains (code))
 267                                 is_error = false;
 268
 269                         return is_error;
 270                 }
 271
 272                 public bool IsWarningEnabled (int code, int level)
 273                 {
 274                         if (WarningLevel < level)
 275                                 return false;
 276
 277                         return !IsWarningDisabledGlobally (code);
 278                 }
 279
 280                 public bool IsWarningDisabledGlobally (int code)
 281                 {
 282                         return warning_ignore_table != null && warning_ignore_table.Contains (code);
 283                 }
 284
 285                 public void SetIgnoreWarning (int code)
 286                 {
 287                         if (warning_ignore_table == null)
 288                                 warning_ignore_table = new HashSet<int> ();
 289
 290                         warning_ignore_table.Add (code);
 291                 }
 292         }
 293
 294         public class CommandLineParser
 295         {
 296                 enum ParseResult
 297                 {
 298                         Success,
 299                         Error,
 300                         Stop,
 301                         UnknownOption
 302                 }
 303
 304                 static readonly char[] argument_value_separator = new char[] { ';', ',' };
 305                 static readonly char[] numeric_value_separator = new char[] { ';', ',', ' ' };
 306
 307                 readonly TextWriter output;
 308                 readonly Report report;
 309                 bool stop_argument;
 310
 311                 Dictionary<string, int> source_file_index;
 312
 313                 public event Func<string[], int, int> UnknownOptionHandler;
 314
 315                 CompilerSettings parser_settings;
 316
 317                 public CommandLineParser (TextWriter errorOutput)
 318                         : this (errorOutput, Console.Out)
 319                 {
 320                 }
 321
 322                 public CommandLineParser (TextWriter errorOutput, TextWriter messagesOutput)
 323                 {
 324                         var rp = new StreamReportPrinter (errorOutput);
 325
 326                         parser_settings = new CompilerSettings ();
 327                         report = new Report (new CompilerContext (parser_settings, rp), rp);
 328                         this.output = messagesOutput;
 329                 }
 330
 331                 public bool HasBeenStopped {
 332                         get {
 333                                 return stop_argument;
 334                         }
 335                 }
 336
 337                 void About ()
 338                 {
 339                         output.WriteLine (
 340                                 "The Mono C# compiler is Copyright 2001-2011, Novell, Inc.\n\n" +
 341                                 "The compiler source code is released under the terms of the \n" +
 342                                 "MIT X11 or GNU GPL licenses\n\n" +
 343
 344                                 "For more information on Mono, visit the project Web site\n" +
 345                                 "   http://www.mono-project.com\n\n" +
 346
 347                                 "The compiler was written by Miguel de Icaza, Ravi Pratap, Martin Baulig, Marek Safar, Raja R Harinath, Atushi Enomoto");
 348                 }
 349
 350                 public CompilerSettings ParseArguments (string[] args)
 351                 {
 352                         CompilerSettings settings = new CompilerSettings ();
 353                         List<string> response_file_list = null;
 354                         bool parsing_options = true;
 355                         stop_argument = false;
 356                         source_file_index = new Dictionary<string, int> ();
 357
 358                         for (int i = 0; i < args.Length; i++) {
 359                                 string arg = args[i];
 360                                 if (arg.Length == 0)
 361                                         continue;
 362
 363                                 if (arg[0] == '@') {
 364                                         string[] extra_args;
 365                                         string response_file = arg.Substring (1);
 366
 367                                         if (response_file_list == null)
 368                                                 response_file_list = new List<string> ();
 369
 370                                         if (response_file_list.Contains (response_file)) {
 371                                                 report.Error (1515, "Response file `{0}' specified multiple times", response_file);
 372                                                 return null;
 373                                         }
 374
 375                                         response_file_list.Add (response_file);
 376
 377                                         extra_args = LoadArgs (response_file);
 378                                         if (extra_args == null) {
 379                                                 report.Error (2011, "Unable to open response file: " + response_file);
 380                                                 return null;
 381                                         }
 382
 383                                         args = AddArgs (args, extra_args);
 384                                         continue;
 385                                 }
 386
 387                                 if (parsing_options) {
 388                                         if (arg == "--") {
 389                                                 parsing_options = false;
 390                                                 continue;
 391                                         }
 392
 393                                         bool dash_opt = arg[0] == '-';
 394                                         bool slash_opt = arg[0] == '/';
 395                                         if (dash_opt) {
 396                                                 switch (ParseOptionUnix (arg, ref args, ref i, settings)) {
 397                                                 case ParseResult.Error:
 398                                                 case ParseResult.Success:
 399                                                         continue;
 400                                                 case ParseResult.Stop:
 401                                                         stop_argument = true;
 402                                                         return settings;
 403                                                 case ParseResult.UnknownOption:
 404                                                         if (UnknownOptionHandler != null) {
 405                                                                 var ret = UnknownOptionHandler (args, i);
 406                                                                 if (ret != -1) {
 407                                                                         i = ret;
 408                                                                         continue;
 409                                                                 }
 410                                                         }
 411                                                         break;
 412                                                 }
 413                                         }
 414
 415                                         if (dash_opt || slash_opt) {
 416                                                 // Try a -CSCOPTION
 417                                                 string csc_opt = dash_opt ? "/" + arg.Substring (1) : arg;
 418                                                 switch (ParseOption (csc_opt, ref args, settings)) {
 419                                                 case ParseResult.Error:
 420                                                 case ParseResult.Success:
 421                                                         continue;
 422                                                 case ParseResult.UnknownOption:
 423                                                         // Need to skip `/home/test.cs' however /test.cs is considered as error
 424                                                         if ((slash_opt && arg.Length > 3 && arg.IndexOf ('/', 2) > 0))
 425                                                                 break;
 426
 427                                                         if (UnknownOptionHandler != null) {
 428                                                                 var ret = UnknownOptionHandler (args, i);
 429                                                                 if (ret != -1) {
 430                                                                         i = ret;
 431                                                                         continue;
 432                                                                 }
 433                                                         }
 434
 435                                                         Error_WrongOption (arg);
 436                                                         return null;
 437
 438                                                 case ParseResult.Stop:
 439                                                         stop_argument = true;
 440                                                         return settings;
 441                                                 }
 442                                         }
 443                                 }
 444
 445                                 ProcessSourceFiles (arg, false, settings.SourceFiles);
 446                         }
 447
 448                         if (report.Errors > 0)
 449                                 return null;
 450
 451                         return settings;
 452                 }
 453
 454                 void ProcessSourceFiles (string spec, bool recurse, List<SourceFile> sourceFiles)
 455                 {
 456                         string path, pattern;
 457
 458                         SplitPathAndPattern (spec, out path, out pattern);
 459                         if (pattern.IndexOf ('*') == -1) {
 460                                 AddSourceFile (spec, sourceFiles);
 461                                 return;
 462                         }
 463
 464                         string[] files = null;
 465                         try {
 466                                 files = Directory.GetFiles (path, pattern);
 467                         } catch (System.IO.DirectoryNotFoundException) {
 468                                 report.Error (2001, "Source file `" + spec + "' could not be found");
 469                                 return;
 470                         } catch (System.IO.IOException) {
 471                                 report.Error (2001, "Source file `" + spec + "' could not be found");
 472                                 return;
 473                         }
 474                         foreach (string f in files) {
 475                                 AddSourceFile (f, sourceFiles);
 476                         }
 477
 478                         if (!recurse)
 479                                 return;
 480
 481                         string[] dirs = null;
 482
 483                         try {
 484                                 dirs = Directory.GetDirectories (path);
 485                         } catch {
 486                         }
 487
 488                         foreach (string d in dirs) {
 489
 490                                 // Don't include path in this string, as each
 491                                 // directory entry already does
 492                                 ProcessSourceFiles (d + "/" + pattern, true, sourceFiles);
 493                         }
 494                 }
 495
 496                 static string[] AddArgs (string[] args, string[] extra_args)
 497                 {
 498                         string[] new_args;
 499                         new_args = new string[extra_args.Length + args.Length];
 500
 501                         // if args contains '--' we have to take that into account
 502                         // split args into first half and second half based on '--'
 503                         // and add the extra_args before --
 504                         int split_position = Array.IndexOf (args, "--");
 505                         if (split_position != -1) {
 506                                 Array.Copy (args, new_args, split_position);
 507                                 extra_args.CopyTo (new_args, split_position);
 508                                 Array.Copy (args, split_position, new_args, split_position + extra_args.Length, args.Length - split_position);
 509                         } else {
 510                                 args.CopyTo (new_args, 0);
 511                                 extra_args.CopyTo (new_args, args.Length);
 512                         }
 513
 514                         return new_args;
 515                 }
 516
 517                 void AddAssemblyReference (string alias, string assembly, CompilerSettings settings)
 518                 {
 519                         if (assembly.Length == 0) {
 520                                 report.Error (1680, "Invalid reference alias `{0}='. Missing filename", alias);
 521                                 return;
 522                         }
 523
 524                         if (!IsExternAliasValid (alias)) {
 525                                 report.Error (1679, "Invalid extern alias for -reference. Alias `{0}' is not a valid identifier", alias);
 526                                 return;
 527                         }
 528
 529                         settings.AssemblyReferencesAliases.Add (Tuple.Create (alias, assembly));
 530                 }
 531
 532                 void AddResource (AssemblyResource res, CompilerSettings settings)
 533                 {
 534                         if (settings.Resources == null) {
 535                                 settings.Resources = new List<AssemblyResource> ();
 536                                 settings.Resources.Add (res);
 537                                 return;
 538                         }
 539
 540                         if (settings.Resources.Contains (res)) {
 541                                 report.Error (1508, "The resource identifier `{0}' has already been used in this assembly", res.Name);
 542                                 return;
 543                         }
 544
 545                         settings.Resources.Add (res);
 546                 }
 547
 548                 void AddSourceFile (string fileName, List<SourceFile> sourceFiles)
 549                 {
 550                         string path = Path.GetFullPath (fileName);
 551
 552                         int index;
 553                         if (source_file_index.TryGetValue (path, out index)) {
 554                                 string other_name = sourceFiles[index - 1].Name;
 555                                 if (fileName.Equals (other_name))
 556                                         report.Warning (2002, 1, "Source file `{0}' specified multiple times", other_name);
 557                                 else
 558                                         report.Warning (2002, 1, "Source filenames `{0}' and `{1}' both refer to the same file: {2}", fileName, other_name, path);
 559
 560                                 return;
 561                         }
 562
 563                         var unit = new SourceFile (fileName, path, sourceFiles.Count + 1);
 564                         sourceFiles.Add (unit);
 565                         source_file_index.Add (path, unit.Index);
 566                 }
 567
 568                 void AddWarningAsError (string warningId, CompilerSettings settings)
 569                 {
 570                         int id;
 571                         try {
 572                                 id = int.Parse (warningId);
 573                         } catch {
 574                                 report.CheckWarningCode (warningId, Location.Null);
 575                                 return;
 576                         }
 577
 578                         if (!report.CheckWarningCode (id, Location.Null))
 579                                 return;
 580
 581                         settings.AddWarningAsError (id);
 582                 }
 583
 584                 void RemoveWarningAsError (string warningId, CompilerSettings settings)
 585                 {
 586                         int id;
 587                         try {
 588                                 id = int.Parse (warningId);
 589                         } catch {
 590                                 report.CheckWarningCode (warningId, Location.Null);
 591                                 return;
 592                         }
 593
 594                         if (!report.CheckWarningCode (id, Location.Null))
 595                                 return;
 596
 597                         settings.AddWarningOnly (id);
 598                 }
 599
 600                 void Error_RequiresArgument (string option)
 601                 {
 602                         report.Error (2006, "Missing argument for `{0}' option", option);
 603                 }
 604
 605                 void Error_RequiresFileName (string option)
 606                 {
 607                         report.Error (2005, "Missing file specification for `{0}' option", option);
 608                 }
 609
 610                 void Error_WrongOption (string option)
 611                 {
 612                         report.Error (2007, "Unrecognized command-line option: `{0}'", option);
 613                 }
 614
 615                 static bool IsExternAliasValid (string identifier)
 616                 {
 617                         if (identifier.Length == 0)
 618                                 return false;
 619                         if (identifier[0] != '_' && !char.IsLetter (identifier[0]))
 620                                 return false;
 621
 622                         for (int i = 1; i < identifier.Length; i++) {
 623                                 char c = identifier[i];
 624                                 if (char.IsLetter (c) || char.IsDigit (c))
 625                                         continue;
 626
 627                                 UnicodeCategory category = char.GetUnicodeCategory (c);
 628                                 if (category != UnicodeCategory.Format || category != UnicodeCategory.NonSpacingMark ||
 629                                                 category != UnicodeCategory.SpacingCombiningMark ||
 630                                                 category != UnicodeCategory.ConnectorPunctuation)
 631                                         return false;
 632                         }
 633
 634                         return true;
 635                 }
 636
 637                 static string[] LoadArgs (string file)
 638                 {
 639                         StreamReader f;
 640                         var args = new List<string> ();
 641                         string line;
 642                         try {
 643                                 f = new StreamReader (file);
 644                         } catch {
 645                                 return null;
 646                         }
 647
 648                         StringBuilder sb = new StringBuilder ();
 649
 650                         while ((line = f.ReadLine ()) != null) {
 651                                 int t = line.Length;
 652
 653                                 for (int i = 0; i < t; i++) {
 654                                         char c = line[i];
 655
 656                                         if (c == '"' || c == '\'') {
 657                                                 char end = c;
 658
 659                                                 for (i++; i < t; i++) {
 660                                                         c = line[i];
 661
 662                                                         if (c == end)
 663                                                                 break;
 664                                                         sb.Append (c);
 665                                                 }
 666                                         } else if (c == ' ') {
 667                                                 if (sb.Length > 0) {
 668                                                         args.Add (sb.ToString ());
 669                                                         sb.Length = 0;
 670                                                 }
 671                                         } else
 672                                                 sb.Append (c);
 673                                 }
 674                                 if (sb.Length > 0) {
 675                                         args.Add (sb.ToString ());
 676                                         sb.Length = 0;
 677                                 }
 678                         }
 679
 680                         return args.ToArray ();
 681                 }
 682
 683                 void OtherFlags ()
 684                 {
 685                         output.WriteLine (
 686                                 "Other flags in the compiler\n" +
 687                                 "   --fatal[=COUNT]    Makes errors after COUNT fatal\n" +
 688                                 "   --lint             Enhanced warnings\n" +
 689                                 "   --parse            Only parses the source file\n" +
 690                                 "   --runtime:VERSION  Sets mscorlib.dll metadata version: v1, v2, v4\n" +
 691                                 "   --stacktrace       Shows stack trace at error location\n" +
 692                                 "   --timestamp        Displays time stamps of various compiler events\n" +
 693                                 "   -v                 Verbose parsing (for debugging the parser)\n" +
 694                                 "   --mcs-debug X      Sets MCS debugging level to X\n");
 695                 }
 696
 697                 //
 698                 // This parses the -arg and /arg options to the compiler, even if the strings
 699                 // in the following text use "/arg" on the strings.
 700                 //
 701                 ParseResult ParseOption (string option, ref string[] args, CompilerSettings settings)
 702                 {
 703                         int idx = option.IndexOf (':');
 704                         string arg, value;
 705
 706                         if (idx == -1) {
 707                                 arg = option;
 708                                 value = "";
 709                         } else {
 710                                 arg = option.Substring (0, idx);
 711
 712                                 value = option.Substring (idx + 1);
 713                         }
 714
 715                         switch (arg.ToLowerInvariant ()) {
 716                         case "/nologo":
 717                                 return ParseResult.Success;
 718
 719                         case "/t":
 720                         case "/target":
 721                                 switch (value) {
 722                                 case "exe":
 723                                         settings.Target = Target.Exe;
 724                                         break;
 725
 726                                 case "winexe":
 727                                         settings.Target = Target.WinExe;
 728                                         break;
 729
 730                                 case "library":
 731                                         settings.Target = Target.Library;
 732                                         settings.TargetExt = ".dll";
 733                                         break;
 734
 735                                 case "module":
 736                                         settings.Target = Target.Module;
 737                                         settings.TargetExt = ".netmodule";
 738                                         break;
 739
 740                                 default:
 741                                         report.Error (2019, "Invalid target type for -target. Valid options are `exe', `winexe', `library' or `module'");
 742                                         return ParseResult.Error;
 743                                 }
 744                                 return ParseResult.Success;
 745
 746                         case "/out":
 747                                 if (value.Length == 0) {
 748                                         Error_RequiresFileName (option);
 749                                         return ParseResult.Error;
 750                                 }
 751                                 settings.OutputFile = value;
 752                                 return ParseResult.Success;
 753
 754                         case "/o":
 755                         case "/o+":
 756                         case "/optimize":
 757                         case "/optimize+":
 758                                 settings.Optimize = true;
 759                                 return ParseResult.Success;
 760
 761                         case "/o-":
 762                         case "/optimize-":
 763                                 settings.Optimize = false;
 764                                 return ParseResult.Success;
 765
 766                         // TODO: Not supported by csc 3.5+
 767                         case "/incremental":
 768                         case "/incremental+":
 769                         case "/incremental-":
 770                                 // nothing.
 771                                 return ParseResult.Success;
 772
 773                         case "/d":
 774                         case "/define": {
 775                                         if (value.Length == 0) {
 776                                                 Error_RequiresArgument (option);
 777                                                 return ParseResult.Error;
 778                                         }
 779
 780                                         foreach (string d in value.Split (argument_value_separator)) {
 781                                                 string conditional = d.Trim ();
 782                                                 if (!Tokenizer.IsValidIdentifier (conditional)) {
 783                                                         report.Warning (2029, 1, "Invalid conditional define symbol `{0}'", conditional);
 784                                                         continue;
 785                                                 }
 786
 787                                                 settings.AddConditionalSymbol (conditional);
 788                                         }
 789                                         return ParseResult.Success;
 790                                 }
 791
 792                         case "/bugreport":
 793                                 //
 794                                 // We should collect data, runtime, etc and store in the file specified
 795                                 //
 796                                 output.WriteLine ("To file bug reports, please visit: http://www.mono-project.com/Bugs");
 797                                 return ParseResult.Success;
 798
 799                         case "/pkg": {
 800                                         string packages;
 801
 802                                         if (value.Length == 0) {
 803                                                 Error_RequiresArgument (option);
 804                                                 return ParseResult.Error;
 805                                         }
 806                                         packages = String.Join (" ", value.Split (new Char[] { ';', ',', '\n', '\r' }));
 807                                         string pkgout = Driver.GetPackageFlags (packages, report);
 808
 809                                         if (pkgout == null)
 810                                                 return ParseResult.Error;
 811
 812                                         string[] xargs = pkgout.Trim (new Char[] { ' ', '\n', '\r', '\t' }).Split (new Char[] { ' ', '\t' });
 813                                         args = AddArgs (args, xargs);
 814                                         return ParseResult.Success;
 815                                 }
 816
 817                         case "/linkres":
 818                         case "/linkresource":
 819                         case "/res":
 820                         case "/resource":
 821                                 AssemblyResource res = null;
 822                                 string[] s = value.Split (argument_value_separator, StringSplitOptions.RemoveEmptyEntries);
 823                                 switch (s.Length) {
 824                                 case 1:
 825                                         if (s[0].Length == 0)
 826                                                 goto default;
 827                                         res = new AssemblyResource (s[0], Path.GetFileName (s[0]));
 828                                         break;
 829                                 case 2:
 830                                         res = new AssemblyResource (s[0], s[1]);
 831                                         break;
 832                                 case 3:
 833                                         if (s[2] != "public" && s[2] != "private") {
 834                                                 report.Error (1906, "Invalid resource visibility option `{0}'. Use either `public' or `private' instead", s[2]);
 835                                                 return ParseResult.Error;
 836                                         }
 837                                         res = new AssemblyResource (s[0], s[1], s[2] == "private");
 838                                         break;
 839                                 default:
 840                                         report.Error (-2005, "Wrong number of arguments for option `{0}'", option);
 841                                         return ParseResult.Error;
 842                                 }
 843
 844                                 if (res != null) {
 845                                         res.IsEmbeded = arg[1] == 'r' || arg[1] == 'R';
 846                                         AddResource (res, settings);
 847                                 }
 848
 849                                 return ParseResult.Success;
 850
 851                         case "/recurse":
 852                                 if (value.Length == 0) {
 853                                         Error_RequiresFileName (option);
 854                                         return ParseResult.Error;
 855                                 }
 856                                 ProcessSourceFiles (value, true, settings.SourceFiles);
 857                                 return ParseResult.Success;
 858
 859                         case "/r":
 860                         case "/reference": {
 861                                         if (value.Length == 0) {
 862                                                 Error_RequiresFileName (option);
 863                                                 return ParseResult.Error;
 864                                         }
 865
 866                                         string[] refs = value.Split (argument_value_separator);
 867                                         foreach (string r in refs) {
 868                                                 if (r.Length == 0)
 869                                                         continue;
 870
 871                                                 string val = r;
 872                                                 int index = val.IndexOf ('=');
 873                                                 if (index > -1) {
 874                                                         string alias = r.Substring (0, index);
 875                                                         string assembly = r.Substring (index + 1);
 876                                                         AddAssemblyReference (alias, assembly, settings);
 877                                                         if (refs.Length != 1) {
 878                                                                 report.Error (2034, "Cannot specify multiple aliases using single /reference option");
 879                                                                 return ParseResult.Error;
 880                                                         }
 881                                                 } else {
 882                                                         settings.AssemblyReferences.Add (val);
 883                                                 }
 884                                         }
 885                                         return ParseResult.Success;
 886                                 }
 887                         case "/addmodule": {
 888                                         if (value.Length == 0) {
 889                                                 Error_RequiresFileName (option);
 890                                                 return ParseResult.Error;
 891                                         }
 892
 893                                         string[] refs = value.Split (argument_value_separator);
 894                                         foreach (string r in refs) {
 895                                                 settings.Modules.Add (r);
 896                                         }
 897                                         return ParseResult.Success;
 898                                 }
 899                         case "/win32res": {
 900                                         if (value.Length == 0) {
 901                                                 Error_RequiresFileName (option);
 902                                                 return ParseResult.Error;
 903                                         }
 904
 905                                         if (settings.Win32IconFile != null)
 906                                                 report.Error (1565, "Cannot specify the `win32res' and the `win32ico' compiler option at the same time");
 907
 908                                         settings.Win32ResourceFile = value;
 909                                         return ParseResult.Success;
 910                                 }
 911                         case "/win32icon": {
 912                                         if (value.Length == 0) {
 913                                                 Error_RequiresFileName (option);
 914                                                 return ParseResult.Error;
 915                                         }
 916
 917                                         if (settings.Win32ResourceFile != null)
 918                                                 report.Error (1565, "Cannot specify the `win32res' and the `win32ico' compiler option at the same time");
 919
 920                                         settings.Win32IconFile = value;
 921                                         return ParseResult.Success;
 922                                 }
 923                         case "/doc": {
 924                                         if (value.Length == 0) {
 925                                                 Error_RequiresFileName (option);
 926                                                 return ParseResult.Error;
 927                                         }
 928
 929                                         settings.DocumentationFile = value;
 930                                         return ParseResult.Success;
 931                                 }
 932                         case "/lib": {
 933                                         string[] libdirs;
 934
 935                                         if (value.Length == 0) {
 936                                                 return ParseResult.Error;
 937                                         }
 938
 939                                         libdirs = value.Split (argument_value_separator);
 940                                         foreach (string dir in libdirs)
 941                                                 settings.ReferencesLookupPaths.Add (dir);
 942                                         return ParseResult.Success;
 943                                 }
 944
 945                         case "/debug-":
 946                                 settings.GenerateDebugInfo = false;
 947                                 return ParseResult.Success;
 948
 949                         case "/debug":
 950                                 if (value == "full" || value == "pdbonly" || idx < 0) {
 951                                         settings.GenerateDebugInfo = true;
 952                                         return ParseResult.Success;
 953                                 }
 954
 955                                 if (value.Length > 0) {
 956                                         report.Error (1902, "Invalid debug option `{0}'. Valid options are `full' or `pdbonly'", value);
 957                                 } else {
 958                                         Error_RequiresArgument (option);
 959                                 }
 960
 961                                 return ParseResult.Error;
 962
 963                         case "/debug+":
 964                                 settings.GenerateDebugInfo = true;
 965                                 return ParseResult.Success;
 966
 967                         case "/checked":
 968                         case "/checked+":
 969                                 settings.Checked = true;
 970                                 return ParseResult.Success;
 971
 972                         case "/checked-":
 973                                 settings.Checked = false;
 974                                 return ParseResult.Success;
 975
 976                         case "/clscheck":
 977                         case "/clscheck+":
 978                                 settings.VerifyClsCompliance = true;
 979                                 return ParseResult.Success;
 980
 981                         case "/clscheck-":
 982                                 settings.VerifyClsCompliance = false;
 983                                 return ParseResult.Success;
 984
 985                         case "/unsafe":
 986                         case "/unsafe+":
 987                                 settings.Unsafe = true;
 988                                 return ParseResult.Success;
 989
 990                         case "/unsafe-":
 991                                 settings.Unsafe = false;
 992                                 return ParseResult.Success;
 993
 994                         case "/warnaserror":
 995                         case "/warnaserror+":
 996                                 if (value.Length == 0) {
 997                                         settings.WarningsAreErrors = true;
 998                                         parser_settings.WarningsAreErrors = true;
 999                                 } else {
1000                                         foreach (string wid in value.Split (numeric_value_separator))
1001                                                 AddWarningAsError (wid, settings);
1002                                 }
1003                                 return ParseResult.Success;
1004
1005                         case "/warnaserror-":
1006                                 if (value.Length == 0) {
1007                                         settings.WarningsAreErrors = false;
1008                                 } else {
1009                                         foreach (string wid in value.Split (numeric_value_separator))
1010                                                 RemoveWarningAsError (wid, settings);
1011                                 }
1012                                 return ParseResult.Success;
1013
1014                         case "/warn":
1015                                 if (value.Length == 0) {
1016                                         Error_RequiresArgument (option);
1017                                         return ParseResult.Error;
1018                                 }
1019
1020                                 SetWarningLevel (value, settings);
1021                                 return ParseResult.Success;
1022
1023                         case "/nowarn":
1024                                         if (value.Length == 0) {
1025                                                 Error_RequiresArgument (option);
1026                                                 return ParseResult.Error;
1027                                         }
1028
1029                                         var warns = value.Split (numeric_value_separator);
1030                                         foreach (string wc in warns) {
1031                                                 try {
1032                                                         if (wc.Trim ().Length == 0)
1033                                                                 continue;
1034
1035                                                         int warn = Int32.Parse (wc);
1036                                                         if (warn < 1) {
1037                                                                 throw new ArgumentOutOfRangeException ("warn");
1038                                                         }
1039                                                         settings.SetIgnoreWarning (warn);
1040                                                 } catch {
1041                                                         report.Error (1904, "`{0}' is not a valid warning number", wc);
1042                                                         return ParseResult.Error;
1043                                                 }
1044                                         }
1045                                         return ParseResult.Success;
1046
1047                         case "/noconfig":
1048                                 settings.LoadDefaultReferences = false;
1049                                 return ParseResult.Success;
1050
1051                         case "/platform":
1052                                 if (value.Length == 0) {
1053                                         Error_RequiresArgument (option);
1054                                         return ParseResult.Error;
1055                                 }
1056
1057                                 switch (value.ToLowerInvariant ()) {
1058                                 case "arm":
1059                                         settings.Platform = Platform.Arm;
1060                                         break;
1061                                 case "anycpu":
1062                                         settings.Platform = Platform.AnyCPU;
1063                                         break;
1064                                 case "x86":
1065                                         settings.Platform = Platform.X86;
1066                                         break;
1067                                 case "x64":
1068                                         settings.Platform = Platform.X64;
1069                                         break;
1070                                 case "itanium":
1071                                         settings.Platform = Platform.IA64;
1072                                         break;
1073                                 case "anycpu32bitpreferred":
1074                                         settings.Platform = Platform.AnyCPU32Preferred;
1075                                         break;
1076                                 default:
1077                                         report.Error (1672, "Invalid -platform option `{0}'. Valid options are `anycpu', `anycpu32bitpreferred', `arm', `x86', `x64' or `itanium'",
1078                                                 value);
1079                                         return ParseResult.Error;
1080                                 }
1081
1082                                 return ParseResult.Success;
1083
1084                         case "/sdk":
1085                                 if (value.Length == 0) {
1086                                         Error_RequiresArgument (option);
1087                                         return ParseResult.Error;
1088                                 }
1089
1090                                 settings.SdkVersion = value;
1091                                 return ParseResult.Success;
1092
1093                         // We just ignore this.
1094                         case "/errorreport":
1095                         case "/filealign":
1096                                 if (value.Length == 0) {
1097                                         Error_RequiresArgument (option);
1098                                         return ParseResult.Error;
1099                                 }
1100
1101                                 return ParseResult.Success;
1102
1103                         case "/helpinternal":
1104                                 OtherFlags ();
1105                                 return ParseResult.Stop;
1106
1107                         case "/help":
1108                         case "/?":
1109                                 Usage ();
1110                                 return ParseResult.Stop;
1111
1112                         case "/main":
1113                         case "/m":
1114                                 if (value.Length == 0) {
1115                                         Error_RequiresArgument (option);
1116                                         return ParseResult.Error;
1117                                 }
1118                                 settings.MainClass = value;
1119                                 return ParseResult.Success;
1120
1121                         case "/nostdlib":
1122                         case "/nostdlib+":
1123                                 settings.StdLib = false;
1124                                 return ParseResult.Success;
1125
1126                         case "/nostdlib-":
1127                                 settings.StdLib = true;
1128                                 return ParseResult.Success;
1129
1130                         case "/fullpaths":
1131                                 settings.ShowFullPaths = true;
1132                                 return ParseResult.Success;
1133
1134                         case "/keyfile":
1135                                 if (value.Length == 0) {
1136                                         Error_RequiresFileName (option);
1137                                         return ParseResult.Error;
1138                                 }
1139
1140                                 settings.StrongNameKeyFile = value;
1141                                 return ParseResult.Success;
1142
1143                         case "/keycontainer":
1144                                 if (value.Length == 0) {
1145                                         Error_RequiresArgument (option);
1146                                         return ParseResult.Error;
1147                                 }
1148
1149                                 settings.StrongNameKeyContainer = value;
1150                                 return ParseResult.Success;
1151
1152                         case "/delaysign+":
1153                         case "/delaysign":
1154                                 settings.StrongNameDelaySign = true;
1155                                 return ParseResult.Success;
1156
1157                         case "/delaysign-":
1158                                 settings.StrongNameDelaySign = false;
1159                                 return ParseResult.Success;
1160
1161                         case "/langversion":
1162                                 if (value.Length == 0) {
1163                                         Error_RequiresArgument (option);
1164                                         return ParseResult.Error;
1165                                 }
1166
1167                                 switch (value.ToLowerInvariant ()) {
1168                                 case "iso-1":
1169                                         settings.Version = LanguageVersion.ISO_1;
1170                                         return ParseResult.Success;
1171                                 case "default":
1172                                         settings.Version = LanguageVersion.Default;
1173                                         return ParseResult.Success;
1174                                 case "iso-2":
1175                                         settings.Version = LanguageVersion.ISO_2;
1176                                         return ParseResult.Success;
1177                                 case "3":
1178                                         settings.Version = LanguageVersion.V_3;
1179                                         return ParseResult.Success;
1180                                 case "4":
1181                                         settings.Version = LanguageVersion.V_4;
1182                                         return ParseResult.Success;
1183                                 case "5":
1184                                         settings.Version = LanguageVersion.V_5;
1185                                         return ParseResult.Success;
1186                                 case "future":
1187                                         settings.Version = LanguageVersion.Future;
1188                                         return ParseResult.Success;
1189                                 }
1190
1191                                 report.Error (1617, "Invalid -langversion option `{0}'. It must be `ISO-1', `ISO-2', `3', `4', `5', `Default' or `Future'", value);
1192                                 return ParseResult.Error;
1193
1194                         case "/codepage":
1195                                 if (value.Length == 0) {
1196                                         Error_RequiresArgument (option);
1197                                         return ParseResult.Error;
1198                                 }
1199
1200                                 switch (value) {
1201                                 case "utf8":
1202                                         settings.Encoding = Encoding.UTF8;
1203                                         break;
1204                                 case "reset":
1205                                         settings.Encoding = Encoding.Default;
1206                                         break;
1207                                 default:
1208                                         try {
1209                                                 settings.Encoding = Encoding.GetEncoding (int.Parse (value));
1210                                         } catch {
1211                                                 report.Error (2016, "Code page `{0}' is invalid or not installed", value);
1212                                         }
1213                                         return ParseResult.Error;
1214                                 }
1215                                 return ParseResult.Success;
1216
1217                         default:
1218                                 return ParseResult.UnknownOption;
1219                         }
1220                 }
1221
1222                 //
1223                 // Currently handles the Unix-like command line options, but will be
1224                 // deprecated in favor of the CSCParseOption, which will also handle the
1225                 // options that start with a dash in the future.
1226                 //
1227                 ParseResult ParseOptionUnix (string arg, ref string[] args, ref int i, CompilerSettings settings)
1228                 {
1229                         switch (arg){
1230                         case "-v":
1231                                 settings.VerboseParserFlag++;
1232                                 return ParseResult.Success;
1233
1234                         case "--version":
1235                                 Version ();
1236                                 return ParseResult.Stop;
1237
1238                         case "--parse":
1239                                 settings.ParseOnly = true;
1240                                 return ParseResult.Success;
1241
1242                         case "--main": case "-m":
1243                                 report.Warning (-29, 1, "Compatibility: Use -main:CLASS instead of --main CLASS or -m CLASS");
1244                                 if ((i + 1) >= args.Length){
1245                                         Error_RequiresArgument (arg);
1246                                         return ParseResult.Error;
1247                                 }
1248                                 settings.MainClass = args[++i];
1249                                 return ParseResult.Success;
1250
1251                         case "--unsafe":
1252                                 report.Warning (-29, 1, "Compatibility: Use -unsafe instead of --unsafe");
1253                                 settings.Unsafe = true;
1254                                 return ParseResult.Success;
1255
1256                         case "/?": case "/h": case "/help":
1257                         case "--help":
1258                                 Usage ();
1259                                 return ParseResult.Stop;
1260
1261                         case "--define":
1262                                 report.Warning (-29, 1, "Compatibility: Use -d:SYMBOL instead of --define SYMBOL");
1263                                 if ((i + 1) >= args.Length){
1264                                         Error_RequiresArgument (arg);
1265                                         return ParseResult.Error;
1266                                 }
1267
1268                                 settings.AddConditionalSymbol (args [++i]);
1269                                 return ParseResult.Success;
1270
1271                         case "--tokenize":
1272                                 settings.TokenizeOnly = true;
1273                                 return ParseResult.Success;
1274
1275                         case "-o":
1276                         case "--output":
1277                                 report.Warning (-29, 1, "Compatibility: Use -out:FILE instead of --output FILE or -o FILE");
1278                                 if ((i + 1) >= args.Length){
1279                                         Error_RequiresArgument (arg);
1280                                         return ParseResult.Error;
1281                                 }
1282                                 settings.OutputFile = args[++i];
1283                                 return ParseResult.Success;
1284
1285                         case "--checked":
1286                                 report.Warning (-29, 1, "Compatibility: Use -checked instead of --checked");
1287                                 settings.Checked = true;
1288                                 return ParseResult.Success;
1289
1290                         case "--stacktrace":
1291                                 settings.Stacktrace = true;
1292                                 return ParseResult.Success;
1293
1294                         case "--linkresource":
1295                         case "--linkres":
1296                                 report.Warning (-29, 1, "Compatibility: Use -linkres:VALUE instead of --linkres VALUE");
1297                                 if ((i + 1) >= args.Length){
1298                                         Error_RequiresArgument (arg);
1299                                         return ParseResult.Error;
1300                                 }
1301
1302                                 AddResource (new AssemblyResource (args[++i], args[i]), settings);
1303                                 return ParseResult.Success;
1304
1305                         case "--resource":
1306                         case "--res":
1307                                 report.Warning (-29, 1, "Compatibility: Use -res:VALUE instead of --res VALUE");
1308                                 if ((i + 1) >= args.Length){
1309                                         Error_RequiresArgument (arg);
1310                                         return ParseResult.Error;
1311                                 }
1312
1313                                 AddResource (new AssemblyResource (args[++i], args[i], true), settings);
1314                                 return ParseResult.Success;
1315
1316                         case "--target":
1317                                 report.Warning (-29, 1, "Compatibility: Use -target:KIND instead of --target KIND");
1318                                 if ((i + 1) >= args.Length){
1319                                         Error_RequiresArgument (arg);
1320                                         return ParseResult.Error;
1321                                 }
1322
1323                                 string type = args [++i];
1324                                 switch (type){
1325                                 case "library":
1326                                         settings.Target = Target.Library;
1327                                         settings.TargetExt = ".dll";
1328                                         break;
1329
1330                                 case "exe":
1331                                         settings.Target = Target.Exe;
1332                                         break;
1333
1334                                 case "winexe":
1335                                         settings.Target = Target.WinExe;
1336                                         break;
1337
1338                                 case "module":
1339                                         settings.Target = Target.Module;
1340                                         settings.TargetExt = ".dll";
1341                                         break;
1342                                 default:
1343                                         report.Error (2019, "Invalid target type for -target. Valid options are `exe', `winexe', `library' or `module'");
1344                                         break;
1345                                 }
1346                                 return ParseResult.Success;
1347
1348                         case "-r":
1349                                 report.Warning (-29, 1, "Compatibility: Use -r:LIBRARY instead of -r library");
1350                                 if ((i + 1) >= args.Length){
1351                                         Error_RequiresArgument (arg);
1352                                         return ParseResult.Error;
1353                                 }
1354
1355                                 string val = args [++i];
1356                                 int idx = val.IndexOf ('=');
1357                                 if (idx > -1) {
1358                                         string alias = val.Substring (0, idx);
1359                                         string assembly = val.Substring (idx + 1);
1360                                         AddAssemblyReference (alias, assembly, settings);
1361                                         return ParseResult.Success;
1362                                 }
1363
1364                                 settings.AssemblyReferences.Add (val);
1365                                 return ParseResult.Success;
1366
1367                         case "-L":
1368                                 report.Warning (-29, 1, "Compatibility: Use -lib:ARG instead of --L arg");
1369                                 if ((i + 1) >= args.Length){
1370                                         Error_RequiresArgument (arg);
1371                                         return ParseResult.Error;
1372                                 }
1373                                 settings.ReferencesLookupPaths.Add (args [++i]);
1374                                 return ParseResult.Success;
1375
1376                         case "--lint":
1377                                 settings.EnhancedWarnings = true;
1378                                 return ParseResult.Success;
1379
1380                         case "--nostdlib":
1381                                 report.Warning (-29, 1, "Compatibility: Use -nostdlib instead of --nostdlib");
1382                                 settings.StdLib = false;
1383                                 return ParseResult.Success;
1384
1385                         case "--nowarn":
1386                                 report.Warning (-29, 1, "Compatibility: Use -nowarn instead of --nowarn");
1387                                 if ((i + 1) >= args.Length){
1388                                         Error_RequiresArgument (arg);
1389                                         return ParseResult.Error;
1390                                 }
1391                                 int warn = 0;
1392
1393                                 try {
1394                                         warn = int.Parse (args [++i]);
1395                                 } catch {
1396                                         Usage ();
1397                                         Environment.Exit (1);
1398                                 }
1399                                 settings.SetIgnoreWarning (warn);
1400                                 return ParseResult.Success;
1401
1402                         case "--wlevel":
1403                                 report.Warning (-29, 1, "Compatibility: Use -warn:LEVEL instead of --wlevel LEVEL");
1404                                 if ((i + 1) >= args.Length){
1405                                         Error_RequiresArgument (arg);
1406                                         return ParseResult.Error;
1407                                 }
1408
1409                                 SetWarningLevel (args [++i], settings);
1410                                 return ParseResult.Success;
1411
1412                         case "--mcs-debug":
1413                                 if ((i + 1) >= args.Length){
1414                                         Error_RequiresArgument (arg);
1415                                         return ParseResult.Error;
1416                                 }
1417
1418                                 try {
1419                                         settings.DebugFlags = int.Parse (args [++i]);
1420                                 } catch {
1421                                         Error_RequiresArgument (arg);
1422                                         return ParseResult.Error;
1423                                 }
1424
1425                                 return ParseResult.Success;
1426
1427                         case "--about":
1428                                 About ();
1429                                 return ParseResult.Stop;
1430
1431                         case "--recurse":
1432                                 report.Warning (-29, 1, "Compatibility: Use -recurse:PATTERN option instead --recurse PATTERN");
1433                                 if ((i + 1) >= args.Length){
1434                                         Error_RequiresArgument (arg);
1435                                         return ParseResult.Error;
1436                                 }
1437                                 ProcessSourceFiles (args [++i], true, settings.SourceFiles);
1438                                 return ParseResult.Success;
1439
1440                         case "--timestamp":
1441                                 settings.Timestamps = true;
1442                                 return ParseResult.Success;
1443
1444                         case "--debug": case "-g":
1445                                 report.Warning (-29, 1, "Compatibility: Use -debug option instead of -g or --debug");
1446                                 settings.GenerateDebugInfo = true;
1447                                 return ParseResult.Success;
1448
1449                         case "--noconfig":
1450                                 report.Warning (-29, 1, "Compatibility: Use -noconfig option instead of --noconfig");
1451                                 settings.LoadDefaultReferences = false;
1452                                 return ParseResult.Success;
1453
1454                         default:
1455                                 if (arg.StartsWith ("--fatal", StringComparison.Ordinal)){
1456                                         int fatal = 1;
1457                                         if (arg.StartsWith ("--fatal=", StringComparison.Ordinal))
1458                                                 int.TryParse (arg.Substring (8), out fatal);
1459
1460                                         settings.FatalCounter = fatal;
1461                                         return ParseResult.Success;
1462                                 }
1463                                 if (arg.StartsWith ("--runtime:", StringComparison.Ordinal)) {
1464                                         string version = arg.Substring (10);
1465
1466                                         switch (version) {
1467                                         case "v1":
1468                                         case "V1":
1469                                                 settings.StdLibRuntimeVersion = RuntimeVersion.v1;
1470                                                 break;
1471                                         case "v2":
1472                                         case "V2":
1473                                                 settings.StdLibRuntimeVersion = RuntimeVersion.v2;
1474                                                 break;
1475                                         case "v4":
1476                                         case "V4":
1477                                                 settings.StdLibRuntimeVersion = RuntimeVersion.v4;
1478                                                 break;
1479                                         }
1480                                         return ParseResult.Success;
1481                                 }
1482
1483                                 return ParseResult.UnknownOption;
1484                         }
1485                 }
1486
1487                 void SetWarningLevel (string s, CompilerSettings settings)
1488                 {
1489                         int level = -1;
1490
1491                         try {
1492                                 level = int.Parse (s);
1493                         } catch {
1494                         }
1495                         if (level < 0 || level > 4) {
1496                                 report.Error (1900, "Warning level must be in the range 0-4");
1497                                 return;
1498                         }
1499                         settings.WarningLevel = level;
1500                 }
1501
1502                 //
1503                 // Given a path specification, splits the path from the file/pattern
1504                 //
1505                 static void SplitPathAndPattern (string spec, out string path, out string pattern)
1506                 {
1507                         int p = spec.LastIndexOf ('/');
1508                         if (p != -1) {
1509                                 //
1510                                 // Windows does not like /file.cs, switch that to:
1511                                 // "\", "file.cs"
1512                                 //
1513                                 if (p == 0) {
1514                                         path = "\\";
1515                                         pattern = spec.Substring (1);
1516                                 } else {
1517                                         path = spec.Substring (0, p);
1518                                         pattern = spec.Substring (p + 1);
1519                                 }
1520                                 return;
1521                         }
1522
1523                         p = spec.LastIndexOf ('\\');
1524                         if (p != -1) {
1525                                 path = spec.Substring (0, p);
1526                                 pattern = spec.Substring (p + 1);
1527                                 return;
1528                         }
1529
1530                         path = ".";
1531                         pattern = spec;
1532                 }
1533
1534                 void Usage ()
1535                 {
1536                         output.WriteLine (
1537                                 "Mono C# compiler, Copyright 2001-2011 Novell, Inc., Copyright 2011-2012 Xamarin, Inc\n" +
1538                                 "mcs [options] source-files\n" +
1539                                 "   --about              About the Mono C# compiler\n" +
1540                                 "   -addmodule:M1[,Mn]   Adds the module to the generated assembly\n" +
1541                                 "   -checked[+|-]        Sets default aritmetic overflow context\n" +
1542                                 "   -clscheck[+|-]       Disables CLS Compliance verifications\n" +
1543                                 "   -codepage:ID         Sets code page to the one in ID (number, utf8, reset)\n" +
1544                                 "   -define:S1[;S2]      Defines one or more conditional symbols (short: -d)\n" +
1545                                 "   -debug[+|-], -g      Generate debugging information\n" +
1546                                 "   -delaysign[+|-]      Only insert the public key into the assembly (no signing)\n" +
1547                                 "   -doc:FILE            Process documentation comments to XML file\n" +
1548                                 "   -fullpaths           Any issued error or warning uses absolute file path\n" +
1549                                 "   -help                Lists all compiler options (short: -?)\n" +
1550                                 "   -keycontainer:NAME   The key pair container used to sign the output assembly\n" +
1551                                 "   -keyfile:FILE        The key file used to strongname the ouput assembly\n" +
1552                                 "   -langversion:TEXT    Specifies language version: ISO-1, ISO-2, 3, 4, 5, Default or Future\n" +
1553                                 "   -lib:PATH1[,PATHn]   Specifies the location of referenced assemblies\n" +
1554                                 "   -main:CLASS          Specifies the class with the Main method (short: -m)\n" +
1555                                 "   -noconfig            Disables implicitly referenced assemblies\n" +
1556                                 "   -nostdlib[+|-]       Does not reference mscorlib.dll library\n" +
1557                                 "   -nowarn:W1[,Wn]      Suppress one or more compiler warnings\n" +
1558                                 "   -optimize[+|-]       Enables advanced compiler optimizations (short: -o)\n" +
1559                                 "   -out:FILE            Specifies output assembly name\n" +
1560                                 "   -pkg:P1[,Pn]         References packages P1..Pn\n" +
1561                                 "   -platform:ARCH       Specifies the target platform of the output assembly\n" +
1562                                 "                        ARCH can be one of: anycpu, anycpu32bitpreferred, arm,\n" +
1563                                 "                        x86, x64 or itanium. The default is anycpu.\n" +
1564                                 "   -recurse:SPEC        Recursively compiles files according to SPEC pattern\n" +
1565                                 "   -reference:A1[,An]   Imports metadata from the specified assembly (short: -r)\n" +
1566                                 "   -reference:ALIAS=A   Imports metadata using specified extern alias (short: -r)\n" +
1567                                 "   -sdk:VERSION         Specifies SDK version of referenced assemblies\n" +
1568                                 "                        VERSION can be one of: 2, 4, 4.5 (default) or a custom value\n" +
1569                                 "   -target:KIND         Specifies the format of the output assembly (short: -t)\n" +
1570                                 "                        KIND can be one of: exe, winexe, library, module\n" +
1571                                 "   -unsafe[+|-]         Allows to compile code which uses unsafe keyword\n" +
1572                                 "   -warnaserror[+|-]    Treats all warnings as errors\n" +
1573                                 "   -warnaserror[+|-]:W1[,Wn] Treats one or more compiler warnings as errors\n" +
1574                                 "   -warn:0-4            Sets warning level, the default is 4 (short -w:)\n" +
1575                                 "   -helpinternal        Shows internal and advanced compiler options\n" +
1576                                 "\n" +
1577                                 "Resources:\n" +
1578                                 "   -linkresource:FILE[,ID] Links FILE as a resource (short: -linkres)\n" +
1579                                 "   -resource:FILE[,ID]     Embed FILE as a resource (short: -res)\n" +
1580                                 "   -win32res:FILE          Specifies Win32 resource file (.res)\n" +
1581                                 "   -win32icon:FILE         Use this icon for the output\n" +
1582                                                                 "   @file                   Read response file for more options\n\n" +
1583                                 "Options can be of the form -option or /option");
1584                 }
1585
1586                 void Version ()
1587                 {
1588                         string version = System.Reflection.MethodBase.GetCurrentMethod ().DeclaringType.Assembly.GetName ().Version.ToString ();
1589                         output.WriteLine ("Mono C# compiler version {0}", version);
1590                 }
1591         }
1592
1593         public class RootContext
1594         {
1595                 //
1596                 // Contains the parsed tree
1597                 //
1598                 static ModuleContainer root;
1599
1600                 static public ModuleContainer ToplevelTypes {
1601                         get { return root; }
1602                         set { root = value; }
1603                 }
1604         }
1605 }