gold/options.h

   1 // options.h -- handle command line options for gold  -*- C++ -*-
   2
   3 // Copyright 2006, 2007 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 // Command_line
  24 //   Holds everything we get from the command line.
  25 // General_options (from Command_line::options())
  26 //   Options which are not position dependent.
  27 // Input_argument (from Command_line::inputs())
  28 //   The list of input files, including -l options.
  29 // Position_dependent_options (from Input_argument::options())
  30 //   Position dependent options which apply to this argument.
  31
  32 #ifndef GOLD_OPTIONS_H
  33 #define GOLD_OPTIONS_H
  34
  35 #include <cstdlib>
  36 #include <list>
  37 #include <string>
  38 #include <vector>
  39
  40 #include "script.h"
  41
  42 namespace gold
  43 {
  44
  45 class Command_line;
  46 class Input_file_group;
  47 class Position_dependent_options;
  48
  49 namespace options
  50 {
  51
  52 class Command_line_options;
  53 struct One_option;
  54 struct One_z_option;
  55 struct One_debug_option;
  56
  57 } // End namespace gold::options.
  58
  59 // A directory to search.  For each directory we record whether it is
  60 // in the sysroot.  We need to know this so that, if a linker script
  61 // is found within the sysroot, we will apply the sysroot to any files
  62 // named by that script.
  63
  64 class Search_directory
  65 {
  66  public:
  67   // We need a default constructor because we put this in a
  68   // std::vector.
  69   Search_directory()
  70     : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
  71   { }
  72
  73   // This is the usual constructor.
  74   Search_directory(const char* name, bool put_in_sysroot)
  75     : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
  76   { gold_assert(!this->name_.empty()); }
  77
  78   // This is called if we have a sysroot.  The sysroot is prefixed to
  79   // any entries for which put_in_sysroot_ is true.  is_in_sysroot_ is
  80   // set to true for any enries which are in the sysroot (this will
  81   // naturally include any entries for which put_in_sysroot_ is true).
  82   // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
  83   // passing SYSROOT to lrealpath.
  84   void
  85   add_sysroot(const char* sysroot, const char* canonical_sysroot);
  86
  87   // Get the directory name.
  88   const std::string&
  89   name() const
  90   { return this->name_; }
  91
  92   // Return whether this directory is in the sysroot.
  93   bool
  94   is_in_sysroot() const
  95   { return this->is_in_sysroot_; }
  96
  97  private:
  98   std::string name_;
  99   bool put_in_sysroot_;
 100   bool is_in_sysroot_;
 101 };
 102
 103 // The position independent options which apply to the whole link.
 104 // There are a lot of them.
 105
 106 class General_options
 107 {
 108  public:
 109   General_options();
 110
 111   // -E: export dynamic symbols.
 112   bool
 113   export_dynamic() const
 114   { return this->export_dynamic_; }
 115
 116   // -I: dynamic linker name.
 117   const char*
 118   dynamic_linker() const
 119   { return this->dynamic_linker_; }
 120
 121   // -L: Library search path.
 122   typedef std::vector<Search_directory> Dir_list;
 123
 124   const Dir_list&
 125   search_path() const
 126   { return this->search_path_; }
 127
 128   // -O: optimization level (0: don't try to optimize output size).
 129   int
 130   optimization_level() const
 131   { return this->optimization_level_; }
 132
 133   // -o: Output file name.
 134   const char*
 135   output_file_name() const
 136   { return this->output_file_name_; }
 137
 138   // -r: Whether we are doing a relocatable link.
 139   bool
 140   is_relocatable() const
 141   { return this->is_relocatable_; }
 142
 143   // -s: Strip all symbols.
 144   bool
 145   strip_all() const
 146   { return this->strip_ == STRIP_ALL; }
 147
 148   // -S: Strip debugging information.
 149   bool
 150   strip_debug() const
 151   { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
 152
 153   // --strip-debug-gdb: strip only debugging information that's not
 154   // used by gdb (at least, for gdb versions <= 6.7).
 155   bool
 156   strip_debug_gdb() const
 157   { return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB; }
 158
 159   // --allow-shlib-undefined: do not warn about unresolved symbols in
 160   // --shared libraries.
 161   bool
 162   allow_shlib_undefined() const
 163   { return this->allow_shlib_undefined_; }
 164
 165   // -Bsymbolic: bind defined symbols locally.
 166   bool
 167   symbolic() const
 168   { return this->symbolic_; }
 169
 170   // --compress-debug-sections: compress .debug_* sections in the
 171   // output file using the given compression method.  This is useful
 172   // when the tools (such as gdb) support compressed sections.
 173   bool
 174   compress_debug_sections() const
 175   { return this->compress_debug_sections_ != NO_COMPRESSION; }
 176
 177   bool
 178   zlib_compress_debug_sections() const
 179   { return this->compress_debug_sections_ == ZLIB_COMPRESSION; }
 180
 181   // --demangle: demangle C++ symbols in our log messages.
 182   bool
 183   demangle() const
 184   { return this->demangle_; }
 185
 186   // --detect-odr-violations: Whether to search for One Defn Rule violations.
 187   bool
 188   detect_odr_violations() const
 189   { return this->detect_odr_violations_; }
 190
 191   // --eh-frame-hdr: Whether to generate an exception frame header.
 192   bool
 193   create_eh_frame_hdr() const
 194   { return this->create_eh_frame_hdr_; }
 195
 196   // --rpath: The runtime search path.
 197   const Dir_list&
 198   rpath() const
 199   { return this->rpath_; }
 200
 201   // --rpath-link: The link time search patch for shared libraries.
 202   const Dir_list&
 203   rpath_link() const
 204   { return this->rpath_link_; }
 205
 206   // --shared: Whether generating a shared object.
 207   bool
 208   is_shared() const
 209   { return this->is_shared_; }
 210
 211   // --static: Whether doing a static link.
 212   bool
 213   is_static() const
 214   { return this->is_static_; }
 215
 216   // --stats: Print resource usage statistics.
 217   bool
 218   print_stats() const
 219   { return this->print_stats_; }
 220
 221   // --sysroot: The system root of a cross-linker.
 222   const std::string&
 223   sysroot() const
 224   { return this->sysroot_; }
 225
 226   // -Ttext: The address of the .text section
 227   uint64_t
 228   text_segment_address() const
 229   { return this->text_segment_address_; }
 230
 231   // Whether -Ttext was used.
 232   bool
 233   user_set_text_segment_address() const
 234   { return this->text_segment_address_ != -1U; }
 235
 236   // --threads: Whether to use threads.
 237   bool
 238   threads() const
 239   { return this->threads_; }
 240
 241   // --thread-count-initial: Threads to use in initial pass.
 242   int
 243   thread_count_initial() const
 244   { return this->thread_count_initial_; }
 245
 246   // --thread-count-middle: Threads to use in middle pass.
 247   int
 248   thread_count_middle() const
 249   { return this->thread_count_middle_; }
 250
 251   // --thread-count-final: Threads to use in final pass.
 252   int
 253   thread_count_final() const
 254   { return this->thread_count_final_; }
 255
 256   // -z execstack, -z noexecstack
 257   bool
 258   is_execstack_set() const
 259   { return this->execstack_ != EXECSTACK_FROM_INPUT; }
 260
 261   bool
 262   is_stack_executable() const
 263   { return this->execstack_ == EXECSTACK_YES; }
 264
 265   // --debug
 266   unsigned int
 267   debug() const
 268   { return this->debug_; }
 269
 270  private:
 271   // Don't copy this structure.
 272   General_options(const General_options&);
 273   General_options& operator=(const General_options&);
 274
 275   friend class Command_line;
 276   friend class options::Command_line_options;
 277
 278   // Which symbols to strip.
 279   enum Strip
 280   {
 281     // Don't strip any symbols.
 282     STRIP_NONE,
 283     // Strip all symbols.
 284     STRIP_ALL,
 285     // Strip debugging information.
 286     STRIP_DEBUG,
 287     // Strip debugging information that's not used by gdb (at least <= 6.7)
 288     STRIP_DEBUG_UNUSED_BY_GDB
 289   };
 290
 291   // Whether to mark the stack as executable.
 292   enum Execstack
 293   {
 294     // Not set on command line.
 295     EXECSTACK_FROM_INPUT,
 296     // Mark the stack as executable.
 297     EXECSTACK_YES,
 298     // Mark the stack as not executable.
 299     EXECSTACK_NO
 300   };
 301
 302   // What compression method to use
 303   enum CompressionMethod
 304   {
 305     NO_COMPRESSION,
 306     ZLIB_COMPRESSION,
 307   };
 308
 309   void
 310   set_export_dynamic()
 311   { this->export_dynamic_ = true; }
 312
 313   void
 314   set_dynamic_linker(const char* arg)
 315   { this->dynamic_linker_ = arg; }
 316
 317   void
 318   add_to_search_path(const char* arg)
 319   { this->search_path_.push_back(Search_directory(arg, false)); }
 320
 321   void
 322   add_to_search_path_with_sysroot(const char* arg)
 323   { this->search_path_.push_back(Search_directory(arg, true)); }
 324
 325   void
 326   set_optimization_level(const char* arg)
 327   {
 328     char* endptr;
 329     this->optimization_level_ = strtol(arg, &endptr, 0);
 330     if (*endptr != '\0' || this->optimization_level_ < 0)
 331       gold_fatal(_("invalid optimization level: %s"), arg);
 332   }
 333
 334   void
 335   set_output_file_name(const char* arg)
 336   { this->output_file_name_ = arg; }
 337
 338   void
 339   set_relocatable()
 340   { this->is_relocatable_ = true; }
 341
 342   void
 343   set_strip_all()
 344   { this->strip_ = STRIP_ALL; }
 345
 346   // Note: normalize_options() depends on the fact that this turns off
 347   // STRIP_ALL if it were already set.
 348   void
 349   set_strip_debug()
 350   { this->strip_ = STRIP_DEBUG; }
 351
 352   void
 353   set_strip_debug_gdb()
 354   { this->strip_ = STRIP_DEBUG_UNUSED_BY_GDB; }
 355
 356   void
 357   set_allow_shlib_undefined()
 358   { this->allow_shlib_undefined_ = true; }
 359
 360   void
 361   set_no_allow_shlib_undefined()
 362   { this->allow_shlib_undefined_ = false; }
 363
 364   void
 365   set_symbolic()
 366   { this->symbolic_ = true; }
 367
 368   void set_compress_debug_sections(const char* arg)
 369   {
 370     if (strcmp(arg, "none") == 0)
 371       this->compress_debug_sections_ = NO_COMPRESSION;
 372 #ifdef HAVE_ZLIB_H
 373     else if (strcmp(arg, "zlib") == 0)
 374       this->compress_debug_sections_ = ZLIB_COMPRESSION;
 375 #endif
 376     else
 377       gold_fatal(_("unsupported argument to --compress-debug-sections: %s"),
 378                  arg);
 379   }
 380
 381   void
 382   set_demangle()
 383   { this->demangle_ = true; }
 384
 385   void
 386   clear_demangle()
 387   { this->demangle_ = false; }
 388
 389   void
 390   set_detect_odr_violations()
 391   { this->detect_odr_violations_ = true; }
 392
 393   void
 394   set_create_eh_frame_hdr()
 395   { this->create_eh_frame_hdr_ = true; }
 396
 397   void
 398   add_to_rpath(const char* arg)
 399   { this->rpath_.push_back(Search_directory(arg, false)); }
 400
 401   void
 402   add_to_rpath_link(const char* arg)
 403   { this->rpath_link_.push_back(Search_directory(arg, false)); }
 404
 405   void
 406   set_shared()
 407   { this->is_shared_ = true; }
 408
 409   void
 410   set_static()
 411   { this->is_static_ = true; }
 412
 413   void
 414   set_stats()
 415   { this->print_stats_ = true; }
 416
 417   void
 418   set_sysroot(const char* arg)
 419   { this->sysroot_ = arg; }
 420
 421   void
 422   set_text_segment_address(const char* arg)
 423   {
 424     char* endptr;
 425     this->text_segment_address_ = strtoull(arg, &endptr, 0);
 426     if (*endptr != '\0'
 427         || this->text_segment_address_ == -1U)
 428       gold_fatal(_("invalid argument to -Ttext: %s"), arg);
 429   }
 430
 431   int
 432   parse_thread_count(const char* arg)
 433   {
 434     char* endptr;
 435     const int count = strtol(arg, &endptr, 0);
 436     if (*endptr != '\0' || count < 0)
 437       gold_fatal(_("invalid thread count: %s"), arg);
 438     return count;
 439   }
 440
 441   void
 442   set_threads()
 443   {
 444 #ifndef ENABLE_THREADS
 445     gold_fatal(_("--threads not supported"));
 446 #endif
 447     this->threads_ = true;
 448   }
 449
 450   void
 451   clear_threads()
 452   { this->threads_ = false; }
 453
 454   void
 455   set_thread_count(const char* arg)
 456   {
 457     int count = this->parse_thread_count(arg);
 458     this->thread_count_initial_ = count;
 459     this->thread_count_middle_ = count;
 460     this->thread_count_final_ = count;
 461   }
 462
 463   void
 464   set_thread_count_initial(const char* arg)
 465   { this->thread_count_initial_ = this->parse_thread_count(arg); }
 466
 467   void
 468   set_thread_count_middle(const char* arg)
 469   { this->thread_count_middle_ = this->parse_thread_count(arg); }
 470
 471   void
 472   set_thread_count_final(const char* arg)
 473   { this->thread_count_final_ = this->parse_thread_count(arg); }
 474
 475   void
 476   ignore(const char*)
 477   { }
 478
 479   void
 480   set_execstack()
 481   { this->execstack_ = EXECSTACK_YES; }
 482
 483   void
 484   set_noexecstack()
 485   { this->execstack_ = EXECSTACK_NO; }
 486
 487   void
 488   set_debug(unsigned int flags)
 489   { this->debug_ = flags; }
 490
 491   // Handle the -z option.
 492   void
 493   handle_z_option(const char*);
 494
 495   // Handle the --debug option.
 496   void
 497   handle_debug_option(const char*);
 498
 499   // Apply any sysroot to the directory lists.
 500   void
 501   add_sysroot();
 502
 503   bool export_dynamic_;
 504   const char* dynamic_linker_;
 505   Dir_list search_path_;
 506   int optimization_level_;
 507   const char* output_file_name_;
 508   bool is_relocatable_;
 509   Strip strip_;
 510   bool allow_shlib_undefined_;
 511   bool symbolic_;
 512   CompressionMethod compress_debug_sections_;
 513   bool demangle_;
 514   bool detect_odr_violations_;
 515   bool create_eh_frame_hdr_;
 516   Dir_list rpath_;
 517   Dir_list rpath_link_;
 518   bool is_shared_;
 519   bool is_static_;
 520   bool print_stats_;
 521   std::string sysroot_;
 522   uint64_t text_segment_address_;
 523   bool threads_;
 524   int thread_count_initial_;
 525   int thread_count_middle_;
 526   int thread_count_final_;
 527   Execstack execstack_;
 528   unsigned int debug_;
 529 };
 530
 531 // The current state of the position dependent options.
 532
 533 class Position_dependent_options
 534 {
 535  public:
 536   Position_dependent_options();
 537
 538   // -Bdynamic/-Bstatic: Whether we are searching for a static archive
 539   // -rather than a shared object.
 540   bool
 541   do_static_search() const
 542   { return this->do_static_search_; }
 543
 544   // --as-needed: Whether to add a DT_NEEDED argument only if the
 545   // dynamic object is used.
 546   bool
 547   as_needed() const
 548   { return this->as_needed_; }
 549
 550   // --whole-archive: Whether to include the entire contents of an
 551   // --archive.
 552   bool
 553   include_whole_archive() const
 554   { return this->include_whole_archive_; }
 555
 556   void
 557   set_static_search()
 558   { this->do_static_search_ = true; }
 559
 560   void
 561   set_dynamic_search()
 562   { this->do_static_search_ = false; }
 563
 564   void
 565   set_as_needed()
 566   { this->as_needed_ = true; }
 567
 568   void
 569   clear_as_needed()
 570   { this->as_needed_ = false; }
 571
 572   void
 573   set_whole_archive()
 574   { this->include_whole_archive_ = true; }
 575
 576   void
 577   clear_whole_archive()
 578   { this->include_whole_archive_ = false; }
 579
 580  private:
 581   bool do_static_search_;
 582   bool as_needed_;
 583   bool include_whole_archive_;
 584 };
 585
 586 // A single file or library argument from the command line.
 587
 588 class Input_file_argument
 589 {
 590  public:
 591   // name: file name or library name
 592   // is_lib: true if name is a library name: that is, emits the leading
 593   //         "lib" and trailing ".so"/".a" from the name
 594   // extra_search_path: an extra directory to look for the file, prior
 595   //         to checking the normal library search path.  If this is "",
 596   //         then no extra directory is added.
 597   // options: The position dependent options at this point in the
 598   //         command line, such as --whole-archive.
 599   Input_file_argument()
 600     : name_(), is_lib_(false), extra_search_path_(""), options_()
 601   { }
 602
 603   Input_file_argument(const char* name, bool is_lib,
 604                       const char* extra_search_path,
 605                       const Position_dependent_options& options)
 606     : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
 607       options_(options)
 608   { }
 609
 610   const char*
 611   name() const
 612   { return this->name_.c_str(); }
 613
 614   const Position_dependent_options&
 615   options() const
 616   { return this->options_; }
 617
 618   bool
 619   is_lib() const
 620   { return this->is_lib_; }
 621
 622   const char*
 623   extra_search_path() const
 624   {
 625     return (this->extra_search_path_.empty()
 626             ? NULL
 627             : this->extra_search_path_.c_str());
 628   }
 629
 630   // Return whether this file may require a search using the -L
 631   // options.
 632   bool
 633   may_need_search() const
 634   { return this->is_lib_ || !this->extra_search_path_.empty(); }
 635
 636  private:
 637   // We use std::string, not const char*, here for convenience when
 638   // using script files, so that we do not have to preserve the string
 639   // in that case.
 640   std::string name_;
 641   bool is_lib_;
 642   std::string extra_search_path_;
 643   Position_dependent_options options_;
 644 };
 645
 646 // A file or library, or a group, from the command line.
 647
 648 class Input_argument
 649 {
 650  public:
 651   // Create a file or library argument.
 652   explicit Input_argument(Input_file_argument file)
 653     : is_file_(true), file_(file), group_(NULL)
 654   { }
 655
 656   // Create a group argument.
 657   explicit Input_argument(Input_file_group* group)
 658     : is_file_(false), group_(group)
 659   { }
 660
 661   // Return whether this is a file.
 662   bool
 663   is_file() const
 664   { return this->is_file_; }
 665
 666   // Return whether this is a group.
 667   bool
 668   is_group() const
 669   { return !this->is_file_; }
 670
 671   // Return the information about the file.
 672   const Input_file_argument&
 673   file() const
 674   {
 675     gold_assert(this->is_file_);
 676     return this->file_;
 677   }
 678
 679   // Return the information about the group.
 680   const Input_file_group*
 681   group() const
 682   {
 683     gold_assert(!this->is_file_);
 684     return this->group_;
 685   }
 686
 687   Input_file_group*
 688   group()
 689   {
 690     gold_assert(!this->is_file_);
 691     return this->group_;
 692   }
 693
 694  private:
 695   bool is_file_;
 696   Input_file_argument file_;
 697   Input_file_group* group_;
 698 };
 699
 700 // A group from the command line.  This is a set of arguments within
 701 // --start-group ... --end-group.
 702
 703 class Input_file_group
 704 {
 705  public:
 706   typedef std::vector<Input_argument> Files;
 707   typedef Files::const_iterator const_iterator;
 708
 709   Input_file_group()
 710     : files_()
 711   { }
 712
 713   // Add a file to the end of the group.
 714   void
 715   add_file(const Input_file_argument& arg)
 716   { this->files_.push_back(Input_argument(arg)); }
 717
 718   // Iterators to iterate over the group contents.
 719
 720   const_iterator
 721   begin() const
 722   { return this->files_.begin(); }
 723
 724   const_iterator
 725   end() const
 726   { return this->files_.end(); }
 727
 728  private:
 729   Files files_;
 730 };
 731
 732 // A list of files from the command line or a script.
 733
 734 class Input_arguments
 735 {
 736  public:
 737   typedef std::vector<Input_argument> Input_argument_list;
 738   typedef Input_argument_list::const_iterator const_iterator;
 739
 740   Input_arguments()
 741     : input_argument_list_(), in_group_(false)
 742   { }
 743
 744   // Add a file.
 745   void
 746   add_file(const Input_file_argument& arg);
 747
 748   // Start a group (the --start-group option).
 749   void
 750   start_group();
 751
 752   // End a group (the --end-group option).
 753   void
 754   end_group();
 755
 756   // Return whether we are currently in a group.
 757   bool
 758   in_group() const
 759   { return this->in_group_; }
 760
 761   // The number of entries in the list.
 762   int
 763   size() const
 764   { return this->input_argument_list_.size(); }
 765
 766   // Iterators to iterate over the list of input files.
 767
 768   const_iterator
 769   begin() const
 770   { return this->input_argument_list_.begin(); }
 771
 772   const_iterator
 773   end() const
 774   { return this->input_argument_list_.end(); }
 775
 776   // Return whether the list is empty.
 777   bool
 778   empty() const
 779   { return this->input_argument_list_.empty(); }
 780
 781  private:
 782   Input_argument_list input_argument_list_;
 783   bool in_group_;
 784 };
 785
 786 // All the information read from the command line.
 787
 788 class Command_line
 789 {
 790  public:
 791   typedef Input_arguments::const_iterator const_iterator;
 792
 793   Command_line();
 794
 795   // Process the command line options.  This will exit with an
 796   // appropriate error message if an unrecognized option is seen.
 797   void
 798   process(int argc, char** argv);
 799
 800   // Process one command-line option.  This takes the index of argv to
 801   // process, and returns the index for the next option.
 802   int
 803   process_one_option(int argc, char** argv, int i, bool* no_more_options);
 804
 805   // Handle a -l option.
 806   int
 807   process_l_option(int, char**, char*, bool);
 808
 809   // Handle a --start-group option.
 810   void
 811   start_group(const char* arg);
 812
 813   // Handle a --end-group option.
 814   void
 815   end_group(const char* arg);
 816
 817   // Get an option argument--a helper function for special processing.
 818   const char*
 819   get_special_argument(const char* longname, int argc, char** argv,
 820                        const char* arg, bool long_option,
 821                        int *pret);
 822
 823   // Get the general options.
 824   const General_options&
 825   options() const
 826   { return this->options_; }
 827
 828   // Get the position dependent options.
 829   const Position_dependent_options&
 830   position_dependent_options() const
 831   { return this->position_options_; }
 832
 833   // The number of input files.
 834   int
 835   number_of_input_files() const
 836   { return this->inputs_.size(); }
 837
 838   // Iterators to iterate over the list of input files.
 839
 840   const_iterator
 841   begin() const
 842   { return this->inputs_.begin(); }
 843
 844   const_iterator
 845   end() const
 846   { return this->inputs_.end(); }
 847
 848  private:
 849   Command_line(const Command_line&);
 850   Command_line& operator=(const Command_line&);
 851
 852   // Report usage error.
 853   void
 854   usage() ATTRIBUTE_NORETURN;
 855   void
 856   usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN;
 857   void
 858   usage(const char* msg, char opt) ATTRIBUTE_NORETURN;
 859
 860   // Apply a command line option.
 861   void
 862   apply_option(const gold::options::One_option&, const char*);
 863
 864   // Add a file.
 865   void
 866   add_file(const char* name, bool is_lib);
 867
 868   // Examine the result of processing the command-line, and verify
 869   // the flags do not contradict each other or are otherwise illegal.
 870   void
 871   normalize_options();
 872
 873   General_options options_;
 874   Position_dependent_options position_options_;
 875   Input_arguments inputs_;
 876 };
 877
 878 } // End namespace gold.
 879
 880 #endif // !defined(GOLD_OPTIONS_H)