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: set entry address.
 112   const char*
 113   entry() const
 114   { return this->entry_; }
 115
 116   // -E: export dynamic symbols.
 117   bool
 118   export_dynamic() const
 119   { return this->export_dynamic_; }
 120
 121   // -h: shared library name.
 122   const char*
 123   soname() const
 124   { return this->soname_; }
 125
 126   // -I: dynamic linker name.
 127   const char*
 128   dynamic_linker() const
 129   { return this->dynamic_linker_; }
 130
 131   // -L: Library search path.
 132   typedef std::vector<Search_directory> Dir_list;
 133
 134   const Dir_list&
 135   search_path() const
 136   { return this->search_path_; }
 137
 138   // -O: optimization level (0: don't try to optimize output size).
 139   int
 140   optimization_level() const
 141   { return this->optimization_level_; }
 142
 143   // -o: Output file name.
 144   const char*
 145   output_file_name() const
 146   { return this->output_file_name_; }
 147
 148   // -r: Whether we are doing a relocatable link.
 149   bool
 150   is_relocatable() const
 151   { return this->is_relocatable_; }
 152
 153   // -s: Strip all symbols.
 154   bool
 155   strip_all() const
 156   { return this->strip_ == STRIP_ALL; }
 157
 158   // -S: Strip debugging information.
 159   bool
 160   strip_debug() const
 161   { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
 162
 163   // --strip-debug-gdb: strip only debugging information that's not
 164   // used by gdb (at least, for gdb versions <= 6.7).
 165   bool
 166   strip_debug_gdb() const
 167   { return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB; }
 168
 169   // --allow-shlib-undefined: do not warn about unresolved symbols in
 170   // --shared libraries.
 171   bool
 172   allow_shlib_undefined() const
 173   { return this->allow_shlib_undefined_; }
 174
 175   // -Bsymbolic: bind defined symbols locally.
 176   bool
 177   symbolic() const
 178   { return this->symbolic_; }
 179
 180   // --compress-debug-sections: compress .debug_* sections in the
 181   // output file using the given compression method.  This is useful
 182   // when the tools (such as gdb) support compressed sections.
 183   bool
 184   compress_debug_sections() const
 185   { return this->compress_debug_sections_ != NO_COMPRESSION; }
 186
 187   bool
 188   zlib_compress_debug_sections() const
 189   { return this->compress_debug_sections_ == ZLIB_COMPRESSION; }
 190
 191   // --demangle: demangle C++ symbols in our log messages.
 192   bool
 193   demangle() const
 194   { return this->demangle_; }
 195
 196   // --detect-odr-violations: Whether to search for One Defn Rule violations.
 197   bool
 198   detect_odr_violations() const
 199   { return this->detect_odr_violations_; }
 200
 201   // --eh-frame-hdr: Whether to generate an exception frame header.
 202   bool
 203   create_eh_frame_hdr() const
 204   { return this->create_eh_frame_hdr_; }
 205
 206   // --rpath: The runtime search path.
 207   const Dir_list&
 208   rpath() const
 209   { return this->rpath_; }
 210
 211   // --rpath-link: The link time search patch for shared libraries.
 212   const Dir_list&
 213   rpath_link() const
 214   { return this->rpath_link_; }
 215
 216   // --shared: Whether generating a shared object.
 217   bool
 218   is_shared() const
 219   { return this->is_shared_; }
 220
 221   // --static: Whether doing a static link.
 222   bool
 223   is_static() const
 224   { return this->is_static_; }
 225
 226   // --stats: Print resource usage statistics.
 227   bool
 228   print_stats() const
 229   { return this->print_stats_; }
 230
 231   // --sysroot: The system root of a cross-linker.
 232   const std::string&
 233   sysroot() const
 234   { return this->sysroot_; }
 235
 236   // -Ttext: The address of the .text section
 237   uint64_t
 238   text_segment_address() const
 239   { return this->text_segment_address_; }
 240
 241   // Whether -Ttext was used.
 242   bool
 243   user_set_text_segment_address() const
 244   { return this->text_segment_address_ != -1U; }
 245
 246   // --threads: Whether to use threads.
 247   bool
 248   threads() const
 249   { return this->threads_; }
 250
 251   // --thread-count-initial: Threads to use in initial pass.
 252   int
 253   thread_count_initial() const
 254   { return this->thread_count_initial_; }
 255
 256   // --thread-count-middle: Threads to use in middle pass.
 257   int
 258   thread_count_middle() const
 259   { return this->thread_count_middle_; }
 260
 261   // --thread-count-final: Threads to use in final pass.
 262   int
 263   thread_count_final() const
 264   { return this->thread_count_final_; }
 265
 266   // -z execstack, -z noexecstack
 267   bool
 268   is_execstack_set() const
 269   { return this->execstack_ != EXECSTACK_FROM_INPUT; }
 270
 271   bool
 272   is_stack_executable() const
 273   { return this->execstack_ == EXECSTACK_YES; }
 274
 275   // --debug
 276   unsigned int
 277   debug() const
 278   { return this->debug_; }
 279
 280  private:
 281   // Don't copy this structure.
 282   General_options(const General_options&);
 283   General_options& operator=(const General_options&);
 284
 285   friend class Command_line;
 286   friend class options::Command_line_options;
 287
 288   // Which symbols to strip.
 289   enum Strip
 290   {
 291     // Don't strip any symbols.
 292     STRIP_NONE,
 293     // Strip all symbols.
 294     STRIP_ALL,
 295     // Strip debugging information.
 296     STRIP_DEBUG,
 297     // Strip debugging information that's not used by gdb (at least <= 6.7)
 298     STRIP_DEBUG_UNUSED_BY_GDB
 299   };
 300
 301   // Whether to mark the stack as executable.
 302   enum Execstack
 303   {
 304     // Not set on command line.
 305     EXECSTACK_FROM_INPUT,
 306     // Mark the stack as executable.
 307     EXECSTACK_YES,
 308     // Mark the stack as not executable.
 309     EXECSTACK_NO
 310   };
 311
 312   // What compression method to use
 313   enum CompressionMethod
 314   {
 315     NO_COMPRESSION,
 316     ZLIB_COMPRESSION,
 317   };
 318
 319   void
 320   set_entry(const char* arg)
 321   { this->entry_ = arg; }
 322
 323   void
 324   set_export_dynamic()
 325   { this->export_dynamic_ = true; }
 326
 327   void
 328   set_soname(const char* arg)
 329   { this->soname_ = arg; }
 330
 331   void
 332   set_dynamic_linker(const char* arg)
 333   { this->dynamic_linker_ = arg; }
 334
 335   void
 336   add_to_search_path(const char* arg)
 337   { this->search_path_.push_back(Search_directory(arg, false)); }
 338
 339   void
 340   add_to_search_path_with_sysroot(const char* arg)
 341   { this->search_path_.push_back(Search_directory(arg, true)); }
 342
 343   void
 344   set_optimization_level(const char* arg)
 345   {
 346     char* endptr;
 347     this->optimization_level_ = strtol(arg, &endptr, 0);
 348     if (*endptr != '\0' || this->optimization_level_ < 0)
 349       gold_fatal(_("invalid optimization level: %s"), arg);
 350   }
 351
 352   void
 353   set_output_file_name(const char* arg)
 354   { this->output_file_name_ = arg; }
 355
 356   void
 357   set_relocatable()
 358   { this->is_relocatable_ = true; }
 359
 360   void
 361   set_strip_all()
 362   { this->strip_ = STRIP_ALL; }
 363
 364   // Note: normalize_options() depends on the fact that this turns off
 365   // STRIP_ALL if it were already set.
 366   void
 367   set_strip_debug()
 368   { this->strip_ = STRIP_DEBUG; }
 369
 370   void
 371   set_strip_debug_gdb()
 372   { this->strip_ = STRIP_DEBUG_UNUSED_BY_GDB; }
 373
 374   void
 375   set_allow_shlib_undefined()
 376   { this->allow_shlib_undefined_ = true; }
 377
 378   void
 379   set_no_allow_shlib_undefined()
 380   { this->allow_shlib_undefined_ = false; }
 381
 382   void
 383   set_symbolic()
 384   { this->symbolic_ = true; }
 385
 386   void set_compress_debug_sections(const char* arg)
 387   {
 388     if (strcmp(arg, "none") == 0)
 389       this->compress_debug_sections_ = NO_COMPRESSION;
 390 #ifdef HAVE_ZLIB_H
 391     else if (strcmp(arg, "zlib") == 0)
 392       this->compress_debug_sections_ = ZLIB_COMPRESSION;
 393 #endif
 394     else
 395       gold_fatal(_("unsupported argument to --compress-debug-sections: %s"),
 396                  arg);
 397   }
 398
 399   void
 400   set_demangle()
 401   { this->demangle_ = true; }
 402
 403   void
 404   clear_demangle()
 405   { this->demangle_ = false; }
 406
 407   void
 408   set_detect_odr_violations()
 409   { this->detect_odr_violations_ = true; }
 410
 411   void
 412   set_create_eh_frame_hdr()
 413   { this->create_eh_frame_hdr_ = true; }
 414
 415   void
 416   add_to_rpath(const char* arg)
 417   { this->rpath_.push_back(Search_directory(arg, false)); }
 418
 419   void
 420   add_to_rpath_link(const char* arg)
 421   { this->rpath_link_.push_back(Search_directory(arg, false)); }
 422
 423   void
 424   set_shared()
 425   { this->is_shared_ = true; }
 426
 427   void
 428   set_static()
 429   { this->is_static_ = true; }
 430
 431   void
 432   set_stats()
 433   { this->print_stats_ = true; }
 434
 435   void
 436   set_sysroot(const char* arg)
 437   { this->sysroot_ = arg; }
 438
 439   void
 440   set_text_segment_address(const char* arg)
 441   {
 442     char* endptr;
 443     this->text_segment_address_ = strtoull(arg, &endptr, 0);
 444     if (*endptr != '\0'
 445         || this->text_segment_address_ == -1U)
 446       gold_fatal(_("invalid argument to -Ttext: %s"), arg);
 447   }
 448
 449   int
 450   parse_thread_count(const char* arg)
 451   {
 452     char* endptr;
 453     const int count = strtol(arg, &endptr, 0);
 454     if (*endptr != '\0' || count < 0)
 455       gold_fatal(_("invalid thread count: %s"), arg);
 456     return count;
 457   }
 458
 459   void
 460   set_threads()
 461   {
 462 #ifndef ENABLE_THREADS
 463     gold_fatal(_("--threads not supported"));
 464 #endif
 465     this->threads_ = true;
 466   }
 467
 468   void
 469   clear_threads()
 470   { this->threads_ = false; }
 471
 472   void
 473   set_thread_count(const char* arg)
 474   {
 475     int count = this->parse_thread_count(arg);
 476     this->thread_count_initial_ = count;
 477     this->thread_count_middle_ = count;
 478     this->thread_count_final_ = count;
 479   }
 480
 481   void
 482   set_thread_count_initial(const char* arg)
 483   { this->thread_count_initial_ = this->parse_thread_count(arg); }
 484
 485   void
 486   set_thread_count_middle(const char* arg)
 487   { this->thread_count_middle_ = this->parse_thread_count(arg); }
 488
 489   void
 490   set_thread_count_final(const char* arg)
 491   { this->thread_count_final_ = this->parse_thread_count(arg); }
 492
 493   void
 494   ignore(const char*)
 495   { }
 496
 497   void
 498   set_execstack()
 499   { this->execstack_ = EXECSTACK_YES; }
 500
 501   void
 502   set_noexecstack()
 503   { this->execstack_ = EXECSTACK_NO; }
 504
 505   void
 506   set_debug(unsigned int flags)
 507   { this->debug_ = flags; }
 508
 509   // Handle the -z option.
 510   void
 511   handle_z_option(const char*);
 512
 513   // Handle the --debug option.
 514   void
 515   handle_debug_option(const char*);
 516
 517   // Apply any sysroot to the directory lists.
 518   void
 519   add_sysroot();
 520
 521   const char* entry_;
 522   bool export_dynamic_;
 523   const char* soname_;
 524   const char* dynamic_linker_;
 525   Dir_list search_path_;
 526   int optimization_level_;
 527   const char* output_file_name_;
 528   bool is_relocatable_;
 529   Strip strip_;
 530   bool allow_shlib_undefined_;
 531   bool symbolic_;
 532   CompressionMethod compress_debug_sections_;
 533   bool demangle_;
 534   bool detect_odr_violations_;
 535   bool create_eh_frame_hdr_;
 536   Dir_list rpath_;
 537   Dir_list rpath_link_;
 538   bool is_shared_;
 539   bool is_static_;
 540   bool print_stats_;
 541   std::string sysroot_;
 542   uint64_t text_segment_address_;
 543   bool threads_;
 544   int thread_count_initial_;
 545   int thread_count_middle_;
 546   int thread_count_final_;
 547   Execstack execstack_;
 548   unsigned int debug_;
 549 };
 550
 551 // The current state of the position dependent options.
 552
 553 class Position_dependent_options
 554 {
 555  public:
 556   Position_dependent_options();
 557
 558   // -Bdynamic/-Bstatic: Whether we are searching for a static archive
 559   // -rather than a shared object.
 560   bool
 561   do_static_search() const
 562   { return this->do_static_search_; }
 563
 564   // --as-needed: Whether to add a DT_NEEDED argument only if the
 565   // dynamic object is used.
 566   bool
 567   as_needed() const
 568   { return this->as_needed_; }
 569
 570   // --whole-archive: Whether to include the entire contents of an
 571   // --archive.
 572   bool
 573   include_whole_archive() const
 574   { return this->include_whole_archive_; }
 575
 576   void
 577   set_static_search()
 578   { this->do_static_search_ = true; }
 579
 580   void
 581   set_dynamic_search()
 582   { this->do_static_search_ = false; }
 583
 584   void
 585   set_as_needed()
 586   { this->as_needed_ = true; }
 587
 588   void
 589   clear_as_needed()
 590   { this->as_needed_ = false; }
 591
 592   void
 593   set_whole_archive()
 594   { this->include_whole_archive_ = true; }
 595
 596   void
 597   clear_whole_archive()
 598   { this->include_whole_archive_ = false; }
 599
 600  private:
 601   bool do_static_search_;
 602   bool as_needed_;
 603   bool include_whole_archive_;
 604 };
 605
 606 // A single file or library argument from the command line.
 607
 608 class Input_file_argument
 609 {
 610  public:
 611   // name: file name or library name
 612   // is_lib: true if name is a library name: that is, emits the leading
 613   //         "lib" and trailing ".so"/".a" from the name
 614   // extra_search_path: an extra directory to look for the file, prior
 615   //         to checking the normal library search path.  If this is "",
 616   //         then no extra directory is added.
 617   // options: The position dependent options at this point in the
 618   //         command line, such as --whole-archive.
 619   Input_file_argument()
 620     : name_(), is_lib_(false), extra_search_path_(""), options_()
 621   { }
 622
 623   Input_file_argument(const char* name, bool is_lib,
 624                       const char* extra_search_path,
 625                       const Position_dependent_options& options)
 626     : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
 627       options_(options)
 628   { }
 629
 630   const char*
 631   name() const
 632   { return this->name_.c_str(); }
 633
 634   const Position_dependent_options&
 635   options() const
 636   { return this->options_; }
 637
 638   bool
 639   is_lib() const
 640   { return this->is_lib_; }
 641
 642   const char*
 643   extra_search_path() const
 644   {
 645     return (this->extra_search_path_.empty()
 646             ? NULL
 647             : this->extra_search_path_.c_str());
 648   }
 649
 650   // Return whether this file may require a search using the -L
 651   // options.
 652   bool
 653   may_need_search() const
 654   { return this->is_lib_ || !this->extra_search_path_.empty(); }
 655
 656  private:
 657   // We use std::string, not const char*, here for convenience when
 658   // using script files, so that we do not have to preserve the string
 659   // in that case.
 660   std::string name_;
 661   bool is_lib_;
 662   std::string extra_search_path_;
 663   Position_dependent_options options_;
 664 };
 665
 666 // A file or library, or a group, from the command line.
 667
 668 class Input_argument
 669 {
 670  public:
 671   // Create a file or library argument.
 672   explicit Input_argument(Input_file_argument file)
 673     : is_file_(true), file_(file), group_(NULL)
 674   { }
 675
 676   // Create a group argument.
 677   explicit Input_argument(Input_file_group* group)
 678     : is_file_(false), group_(group)
 679   { }
 680
 681   // Return whether this is a file.
 682   bool
 683   is_file() const
 684   { return this->is_file_; }
 685
 686   // Return whether this is a group.
 687   bool
 688   is_group() const
 689   { return !this->is_file_; }
 690
 691   // Return the information about the file.
 692   const Input_file_argument&
 693   file() const
 694   {
 695     gold_assert(this->is_file_);
 696     return this->file_;
 697   }
 698
 699   // Return the information about the group.
 700   const Input_file_group*
 701   group() const
 702   {
 703     gold_assert(!this->is_file_);
 704     return this->group_;
 705   }
 706
 707   Input_file_group*
 708   group()
 709   {
 710     gold_assert(!this->is_file_);
 711     return this->group_;
 712   }
 713
 714  private:
 715   bool is_file_;
 716   Input_file_argument file_;
 717   Input_file_group* group_;
 718 };
 719
 720 // A group from the command line.  This is a set of arguments within
 721 // --start-group ... --end-group.
 722
 723 class Input_file_group
 724 {
 725  public:
 726   typedef std::vector<Input_argument> Files;
 727   typedef Files::const_iterator const_iterator;
 728
 729   Input_file_group()
 730     : files_()
 731   { }
 732
 733   // Add a file to the end of the group.
 734   void
 735   add_file(const Input_file_argument& arg)
 736   { this->files_.push_back(Input_argument(arg)); }
 737
 738   // Iterators to iterate over the group contents.
 739
 740   const_iterator
 741   begin() const
 742   { return this->files_.begin(); }
 743
 744   const_iterator
 745   end() const
 746   { return this->files_.end(); }
 747
 748  private:
 749   Files files_;
 750 };
 751
 752 // A list of files from the command line or a script.
 753
 754 class Input_arguments
 755 {
 756  public:
 757   typedef std::vector<Input_argument> Input_argument_list;
 758   typedef Input_argument_list::const_iterator const_iterator;
 759
 760   Input_arguments()
 761     : input_argument_list_(), in_group_(false)
 762   { }
 763
 764   // Add a file.
 765   void
 766   add_file(const Input_file_argument& arg);
 767
 768   // Start a group (the --start-group option).
 769   void
 770   start_group();
 771
 772   // End a group (the --end-group option).
 773   void
 774   end_group();
 775
 776   // Return whether we are currently in a group.
 777   bool
 778   in_group() const
 779   { return this->in_group_; }
 780
 781   // The number of entries in the list.
 782   int
 783   size() const
 784   { return this->input_argument_list_.size(); }
 785
 786   // Iterators to iterate over the list of input files.
 787
 788   const_iterator
 789   begin() const
 790   { return this->input_argument_list_.begin(); }
 791
 792   const_iterator
 793   end() const
 794   { return this->input_argument_list_.end(); }
 795
 796   // Return whether the list is empty.
 797   bool
 798   empty() const
 799   { return this->input_argument_list_.empty(); }
 800
 801  private:
 802   Input_argument_list input_argument_list_;
 803   bool in_group_;
 804 };
 805
 806 // All the information read from the command line.
 807
 808 class Command_line
 809 {
 810  public:
 811   typedef Input_arguments::const_iterator const_iterator;
 812
 813   Command_line();
 814
 815   // Process the command line options.  This will exit with an
 816   // appropriate error message if an unrecognized option is seen.
 817   void
 818   process(int argc, char** argv);
 819
 820   // Process one command-line option.  This takes the index of argv to
 821   // process, and returns the index for the next option.
 822   int
 823   process_one_option(int argc, char** argv, int i, bool* no_more_options);
 824
 825   // Handle a -l option.
 826   int
 827   process_l_option(int, char**, char*, bool);
 828
 829   // Handle a --start-group option.
 830   void
 831   start_group(const char* arg);
 832
 833   // Handle a --end-group option.
 834   void
 835   end_group(const char* arg);
 836
 837   // Set the entry symbol from a linker script.
 838   void
 839   set_entry(const char* entry)
 840   { this->options_.set_entry(entry); }
 841
 842   // Get an option argument--a helper function for special processing.
 843   const char*
 844   get_special_argument(const char* longname, int argc, char** argv,
 845                        const char* arg, bool long_option,
 846                        int *pret);
 847
 848   // Get the general options.
 849   const General_options&
 850   options() const
 851   { return this->options_; }
 852
 853   // Get the position dependent options.
 854   const Position_dependent_options&
 855   position_dependent_options() const
 856   { return this->position_options_; }
 857
 858   // The number of input files.
 859   int
 860   number_of_input_files() const
 861   { return this->inputs_.size(); }
 862
 863   // Iterators to iterate over the list of input files.
 864
 865   const_iterator
 866   begin() const
 867   { return this->inputs_.begin(); }
 868
 869   const_iterator
 870   end() const
 871   { return this->inputs_.end(); }
 872
 873  private:
 874   Command_line(const Command_line&);
 875   Command_line& operator=(const Command_line&);
 876
 877   // Report usage error.
 878   void
 879   usage() ATTRIBUTE_NORETURN;
 880   void
 881   usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN;
 882   void
 883   usage(const char* msg, char opt) ATTRIBUTE_NORETURN;
 884
 885   // Apply a command line option.
 886   void
 887   apply_option(const gold::options::One_option&, const char*);
 888
 889   // Add a file.
 890   void
 891   add_file(const char* name, bool is_lib);
 892
 893   // Examine the result of processing the command-line, and verify
 894   // the flags do not contradict each other or are otherwise illegal.
 895   void
 896   normalize_options();
 897
 898   General_options options_;
 899   Position_dependent_options position_options_;
 900   Input_arguments inputs_;
 901 };
 902
 903 } // End namespace gold.
 904
 905 #endif // !defined(GOLD_OPTIONS_H)