1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
28 #include "filenames.h"
29 #include "libiberty.h"
37 // The information we keep for a single command line option.
39 struct options::One_option
41 // The single character option name, or '\0' if this is only a long
45 // The long option name, or NULL if this is only a short option.
46 const char* long_option;
48 // Description of the option for --help output, or NULL if there is none.
51 // How to print the option name in --help output, or NULL to use the
53 const char* help_output;
55 // Long option dash control. This is ignored if long_option is
59 // Long option normally takes one dash; two dashes are also
62 // Long option normally takes two dashes; one dash is also
65 // Long option always takes two dashes.
69 // Function for special handling, or NULL. Returns the number of
70 // arguments to skip. This will normally be at least 1, but it may
71 // be 0 if this function changes *argv. ARG points to the location
72 // in *ARGV where the option starts, which may be helpful for a
74 int (*special)(int argc, char** argv, char *arg, bool long_option,
77 // If this is a position independent option which does not take an
78 // argument, this is the member function to call to record it.
79 void (General_options::*general_noarg)();
81 // If this is a position independent function which takes an
82 // argument, this is the member function to call to record it.
83 void (General_options::*general_arg)(const char*);
85 // If this is a position dependent option which does not take an
86 // argument, this is the member function to call to record it.
87 void (Position_dependent_options::*dependent_noarg)();
89 // If this is a position dependent option which takes an argument,
90 // this is the member function to record it.
91 void (Position_dependent_options::*dependent_arg)(const char*);
93 // Return whether this option takes an argument.
95 takes_argument() const
96 { return this->general_arg != NULL || this->dependent_arg != NULL; }
99 // We have a separate table for -z options.
101 struct options::One_z_option
103 // The name of the option.
106 // The member function in General_options called to record it.
107 void (General_options::*set)();
110 // We have a separate table for --debug options.
112 struct options::One_debug_option
114 // The name of the option.
117 // The flags to turn on.
118 unsigned int debug_flags;
121 class options::Command_line_options
124 static const One_option options[];
125 static const int options_size;
126 static const One_z_option z_options[];
127 static const int z_options_size;
128 static const One_debug_option debug_options[];
129 static const int debug_options_size;
132 } // End namespace gold.
137 // Handle the special -l option, which adds an input file.
140 library(int argc, char** argv, char* arg, bool long_option,
141 gold::Command_line* cmdline)
143 return cmdline->process_l_option(argc, argv, arg, long_option);
146 // Handle the special -T/--script option, which reads a linker script.
149 invoke_script(int argc, char** argv, char* arg, bool long_option,
150 gold::Command_line* cmdline)
153 const char* script_name = cmdline->get_special_argument("script", argc, argv,
156 if (!read_commandline_script(script_name, cmdline))
157 gold::gold_error(_("unable to parse script file %s\n"), script_name);
161 // Handle the special --start-group option.
164 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
166 cmdline->start_group(arg);
170 // Handle the special --end-group option.
173 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
175 cmdline->end_group(arg);
179 // Report usage information for ld --help, and exit.
182 help(int, char**, char*, bool, gold::Command_line*)
184 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
186 const int options_size = gold::options::Command_line_options::options_size;
187 const gold::options::One_option* options =
188 gold::options::Command_line_options::options;
189 for (int i = 0; i < options_size; ++i)
191 if (options[i].doc == NULL)
201 if (options[j].help_output != NULL)
208 printf(options[j].help_output);
209 len += std::strlen(options[i].help_output);
214 if (options[j].short_option != '\0')
221 printf("-%c", options[j].short_option);
226 if (options[j].long_option != NULL)
233 if (options[j].dash == gold::options::One_option::ONE_DASH)
243 printf("%s", options[j].long_option);
244 len += std::strlen(options[j].long_option);
250 while (j < options_size && options[j].doc == NULL);
257 for (; len < 30; ++len)
260 std::puts(options[i].doc);
263 ::exit(EXIT_SUCCESS);
268 // Report version information.
271 version(int, char**, char* opt, bool, gold::Command_line*)
273 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
274 ::exit(EXIT_SUCCESS);
278 // If the default sysroot is relocatable, try relocating it based on
282 get_relative_sysroot(const char* from)
284 char* path = make_relative_prefix(gold::program_name, from,
289 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
297 // Return the default sysroot. This is set by the --with-sysroot
298 // option to configure.
301 get_default_sysroot()
303 const char* sysroot = TARGET_SYSTEM_ROOT;
304 if (*sysroot == '\0')
307 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
309 char* path = get_relative_sysroot (BINDIR);
311 path = get_relative_sysroot (TOOLBINDIR);
314 std::string ret = path;
323 } // End anonymous namespace.
328 // Helper macros used to specify the options. We could also do this
329 // using constructors, but then g++ would generate code to initialize
330 // the array. We want the array to be initialized statically so that
331 // we get better startup time.
333 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
334 { short_option, long_option, doc, help, options::One_option::dash, \
335 NULL, func, NULL, NULL, NULL }
336 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
337 { short_option, long_option, doc, help, options::One_option::dash, \
338 NULL, NULL, func, NULL, NULL }
339 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
340 { short_option, long_option, doc, help, options::One_option::dash, \
341 NULL, NULL, NULL, func, NULL }
342 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
343 { short_option, long_option, doc, help, options::One_option::dash, \
344 NULL, NULL, NULL, NULL, func }
345 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
346 { short_option, long_option, doc, help, options::One_option::dash, \
347 func, NULL, NULL, NULL, NULL }
349 // Here is the actual list of options which we accept.
351 const options::One_option
352 options::Command_line_options::options[] =
354 GENERAL_NOARG('\0', "allow-shlib-undefined",
355 N_("Allow unresolved references in shared libraries"),
357 &General_options::set_allow_shlib_undefined),
358 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
359 N_("Do not allow unresolved references in shared libraries"),
361 &General_options::set_no_allow_shlib_undefined),
362 POSDEP_NOARG('\0', "as-needed",
363 N_("Only set DT_NEEDED for dynamic libs if used"),
364 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
365 POSDEP_NOARG('\0', "no-as-needed",
366 N_("Always DT_NEEDED for dynamic libs (default)"),
367 NULL, TWO_DASHES, &Position_dependent_options::clear_as_needed),
368 POSDEP_NOARG('\0', "Bdynamic",
369 N_("-l searches for shared libraries"),
371 &Position_dependent_options::set_dynamic_search),
372 POSDEP_NOARG('\0', "Bstatic",
373 N_("-l does not search for shared libraries"),
375 &Position_dependent_options::set_static_search),
376 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
377 NULL, ONE_DASH, &General_options::set_symbolic),
379 # define ZLIB_STR ",zlib"
383 GENERAL_ARG('\0', "compress-debug-sections",
384 N_("Compress .debug_* sections in the output file "
385 "(default is none)"),
386 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
388 &General_options::set_compress_debug_sections),
389 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
390 NULL, TWO_DASHES, &General_options::set_demangle),
391 GENERAL_NOARG('\0', "no-demangle",
392 N_("Do not demangle C++ symbols in log messages"),
393 NULL, TWO_DASHES, &General_options::clear_demangle),
394 GENERAL_NOARG('\0', "detect-odr-violations",
395 N_("Try to detect violations of the One Definition Rule"),
396 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
397 GENERAL_ARG('e', "entry", N_("Set program start address"),
398 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
399 &General_options::set_entry),
400 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
401 NULL, TWO_DASHES, &General_options::set_export_dynamic),
402 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
403 NULL, TWO_DASHES, &General_options::set_create_eh_frame_hdr),
404 GENERAL_ARG('h', "soname", N_("Set shared library name"),
405 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
406 &General_options::set_soname),
407 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
408 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
409 &General_options::set_dynamic_linker),
410 SPECIAL('l', "library", N_("Search for library LIBNAME"),
411 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
413 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
414 N_("-L DIR, --library-path DIR"), TWO_DASHES,
415 &General_options::add_to_search_path),
416 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
417 &General_options::ignore),
418 GENERAL_ARG('o', "output", N_("Set output file name"),
419 N_("-o FILE, --output FILE"), TWO_DASHES,
420 &General_options::set_output_file_name),
421 GENERAL_ARG('O', NULL, N_("Optimize output file size"),
422 N_("-O level"), ONE_DASH,
423 &General_options::set_optimization_level),
424 GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
425 ONE_DASH, &General_options::set_relocatable),
426 GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
427 N_("-R DIR, -rpath DIR"), ONE_DASH,
428 &General_options::add_to_rpath),
429 GENERAL_ARG('\0', "rpath-link",
430 N_("Add DIR to link time shared library search path"),
431 N_("--rpath-link DIR"), TWO_DASHES,
432 &General_options::add_to_rpath_link),
433 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
434 TWO_DASHES, &General_options::set_strip_all),
435 GENERAL_NOARG('\0', "strip-debug-gdb",
436 N_("Strip debug symbols that are unused by gdb "
437 "(at least versions <= 6.7)"),
438 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
439 // This must come after -Sdebug since it's a prefix of it.
440 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
441 TWO_DASHES, &General_options::set_strip_debug),
442 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
443 NULL, ONE_DASH, &General_options::set_shared),
444 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
445 NULL, ONE_DASH, &General_options::set_static),
446 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
447 NULL, TWO_DASHES, &General_options::set_stats),
448 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
449 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
450 GENERAL_ARG('\0', "Ttext", N_("Set the address of the .text section"),
451 N_("-Ttext ADDRESS"), ONE_DASH,
452 &General_options::set_text_segment_address),
453 // This must come after -Ttext since it's a prefix of it.
454 SPECIAL('T', "script", N_("Read linker script"),
455 N_("-T FILE, --script FILE"), TWO_DASHES,
457 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
458 NULL, TWO_DASHES, &General_options::set_threads),
459 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
460 NULL, TWO_DASHES, &General_options::clear_threads),
461 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
462 N_("--thread-count COUNT"), TWO_DASHES,
463 &General_options::set_thread_count),
464 GENERAL_ARG('\0', "thread-count-initial",
465 N_("Number of threads to use in initial pass"),
466 N_("--thread-count-initial COUNT"), TWO_DASHES,
467 &General_options::set_thread_count_initial),
468 GENERAL_ARG('\0', "thread-count-middle",
469 N_("Number of threads to use in middle pass"),
470 N_("--thread-count-middle COUNT"), TWO_DASHES,
471 &General_options::set_thread_count_middle),
472 GENERAL_ARG('\0', "thread-count-final",
473 N_("Number of threads to use in final pass"),
474 N_("--thread-count-final COUNT"), TWO_DASHES,
475 &General_options::set_thread_count_final),
476 POSDEP_NOARG('\0', "whole-archive",
477 N_("Include all archive contents"),
479 &Position_dependent_options::set_whole_archive),
480 POSDEP_NOARG('\0', "no-whole-archive",
481 N_("Include only needed archive contents"),
483 &Position_dependent_options::clear_whole_archive),
485 GENERAL_ARG('z', NULL,
486 N_("Subcommands as follows:\n\
487 -z execstack Mark output as requiring executable stack\n\
488 -z noexecstack Mark output as not requiring executable stack"),
489 N_("-z SUBCOMMAND"), ONE_DASH,
490 &General_options::handle_z_option),
492 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
493 TWO_DASHES, &start_group),
494 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
495 TWO_DASHES, &end_group),
496 SPECIAL('\0', "help", N_("Report usage information"), NULL,
498 SPECIAL('v', "version", N_("Report version information"), NULL,
499 TWO_DASHES, &version),
500 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task)"),
501 N_("--debug=TYPE"), TWO_DASHES,
502 &General_options::handle_debug_option)
505 const int options::Command_line_options::options_size =
506 sizeof (options) / sizeof (options[0]);
510 const options::One_z_option
511 options::Command_line_options::z_options[] =
513 { "execstack", &General_options::set_execstack },
514 { "noexecstack", &General_options::set_noexecstack },
517 const int options::Command_line_options::z_options_size =
518 sizeof(z_options) / sizeof(z_options[0]);
520 // The --debug options.
522 const options::One_debug_option
523 options::Command_line_options::debug_options[] =
525 { "all", DEBUG_ALL },
526 { "task", DEBUG_TASK },
529 const int options::Command_line_options::debug_options_size =
530 sizeof(debug_options) / sizeof(debug_options[0]);
532 // The default values for the general options.
534 General_options::General_options()
536 export_dynamic_(false),
538 dynamic_linker_(NULL),
540 optimization_level_(0),
541 output_file_name_("a.out"),
542 is_relocatable_(false),
544 allow_shlib_undefined_(false),
546 compress_debug_sections_(NO_COMPRESSION),
547 detect_odr_violations_(false),
548 create_eh_frame_hdr_(false),
555 text_segment_address_(-1U), // -1 indicates value not set by user
557 thread_count_initial_(0),
558 thread_count_middle_(0),
559 thread_count_final_(0),
560 execstack_(EXECSTACK_FROM_INPUT),
563 // We initialize demangle_ based on the environment variable
564 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
565 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
566 // environment. Acting the same way here lets us provide the same
567 // interface by default.
568 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
571 // The default values for the position dependent options.
573 Position_dependent_options::Position_dependent_options()
574 : do_static_search_(false),
576 include_whole_archive_(false)
580 // Handle the -z option.
583 General_options::handle_z_option(const char* arg)
585 const int z_options_size = options::Command_line_options::z_options_size;
586 const gold::options::One_z_option* z_options =
587 gold::options::Command_line_options::z_options;
588 for (int i = 0; i < z_options_size; ++i)
590 if (strcmp(arg, z_options[i].name) == 0)
592 (this->*(z_options[i].set))();
597 fprintf(stderr, _("%s: unrecognized -z subcommand: %s\n"),
599 ::exit(EXIT_FAILURE);
602 // Handle the --debug option.
605 General_options::handle_debug_option(const char* arg)
607 const int debug_options_size =
608 options::Command_line_options::debug_options_size;
609 const gold::options::One_debug_option* debug_options =
610 options::Command_line_options::debug_options;
611 for (int i = 0; i < debug_options_size; ++i)
613 if (strcmp(arg, debug_options[i].name) == 0)
615 this->set_debug(debug_options[i].debug_flags);
620 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
622 ::exit(EXIT_FAILURE);
625 // Add the sysroot, if any, to the search paths.
628 General_options::add_sysroot()
630 if (this->sysroot_.empty())
632 this->sysroot_ = get_default_sysroot();
633 if (this->sysroot_.empty())
637 const char* sysroot = this->sysroot_.c_str();
638 char* canonical_sysroot = lrealpath(sysroot);
640 for (Dir_list::iterator p = this->search_path_.begin();
641 p != this->search_path_.end();
643 p->add_sysroot(sysroot, canonical_sysroot);
645 free(canonical_sysroot);
648 // Search_directory methods.
650 // This is called if we have a sysroot. Apply the sysroot if
651 // appropriate. Record whether the directory is in the sysroot.
654 Search_directory::add_sysroot(const char* sysroot,
655 const char* canonical_sysroot)
657 gold_assert(*sysroot != '\0');
658 if (this->put_in_sysroot_)
660 if (!IS_DIR_SEPARATOR(this->name_[0])
661 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
662 this->name_ = '/' + this->name_;
663 this->name_ = sysroot + this->name_;
664 this->is_in_sysroot_ = true;
668 // Check whether this entry is in the sysroot. To do this
669 // correctly, we need to use canonical names. Otherwise we will
670 // get confused by the ../../.. paths that gcc tends to use.
671 char* canonical_name = lrealpath(this->name_.c_str());
672 int canonical_name_len = strlen(canonical_name);
673 int canonical_sysroot_len = strlen(canonical_sysroot);
674 if (canonical_name_len > canonical_sysroot_len
675 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
677 canonical_name[canonical_sysroot_len] = '\0';
678 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
679 this->is_in_sysroot_ = true;
681 free(canonical_name);
685 // Input_arguments methods.
687 // Add a file to the list.
690 Input_arguments::add_file(const Input_file_argument& file)
692 if (!this->in_group_)
693 this->input_argument_list_.push_back(Input_argument(file));
696 gold_assert(!this->input_argument_list_.empty());
697 gold_assert(this->input_argument_list_.back().is_group());
698 this->input_argument_list_.back().group()->add_file(file);
705 Input_arguments::start_group()
707 gold_assert(!this->in_group_);
708 Input_file_group* group = new Input_file_group();
709 this->input_argument_list_.push_back(Input_argument(group));
710 this->in_group_ = true;
716 Input_arguments::end_group()
718 gold_assert(this->in_group_);
719 this->in_group_ = false;
722 // Command_line options.
724 Command_line::Command_line()
725 : options_(), position_options_(), inputs_()
729 // Process the command line options. For process_one_option,
730 // i is the index of argv to process next, and the return value
731 // is the index of the next option to process (i+1 or i+2, or argc
732 // to indicate processing is done). no_more_options is set to true
733 // if (and when) "--" is seen as an option.
736 Command_line::process_one_option(int argc, char** argv, int i,
737 bool* no_more_options)
739 const int options_size = options::Command_line_options::options_size;
740 const options::One_option* options = options::Command_line_options::options;
741 gold_assert(i < argc);
743 if (argv[i][0] != '-' || *no_more_options)
745 this->add_file(argv[i], false);
749 // Option starting with '-'.
751 if (argv[i][1] == '-')
754 if (argv[i][2] == '\0')
756 *no_more_options = true;
761 // Look for a long option match.
762 char* opt = argv[i] + dashes;
765 char* arg = strchr(opt, '=');
766 bool argument_with_equals = arg != NULL;
772 else if (i + 1 < argc)
779 for (j = 0; j < options_size; ++j)
781 if (options[j].long_option != NULL
784 != options::One_option::EXACTLY_TWO_DASHES))
785 && first == options[j].long_option[0]
786 && strcmp(opt, options[j].long_option) == 0)
788 if (options[j].special)
790 // Restore the '=' we clobbered above.
791 if (arg != NULL && skiparg == 0)
793 i += options[j].special(argc - i, argv + i, opt, true, this);
797 if (!options[j].takes_argument())
799 if (argument_with_equals)
800 this->usage(_("unexpected argument"), argv[i]);
807 this->usage(_("missing argument"), argv[i]);
809 this->apply_option(options[j], arg);
815 if (j < options_size)
818 // If we saw two dashes, we needed to have seen a long option.
820 this->usage(_("unknown option"), argv[i]);
822 // Look for a short option match. There may be more than one
823 // short option in a given argument.
825 char* s = argv[i] + 1;
827 while (*s != '\0' && !done)
831 for (j = 0; j < options_size; ++j)
833 if (options[j].short_option == opt)
835 if (options[j].special)
837 // Undo the argument skip done above.
839 i += options[j].special(argc - i, argv + i, s, false,
846 if (options[j].takes_argument())
859 this->usage(_("missing argument"), opt);
861 this->apply_option(options[j], arg);
867 if (j >= options_size)
868 this->usage(_("unknown option"), *s);
877 Command_line::process(int argc, char** argv)
879 bool no_more_options = false;
882 i = process_one_option(argc, argv, i, &no_more_options);
884 if (this->inputs_.in_group())
886 fprintf(stderr, _("%s: missing group end\n"), program_name);
890 // FIXME: We should only do this when configured in native mode.
891 this->options_.add_to_search_path_with_sysroot("/lib");
892 this->options_.add_to_search_path_with_sysroot("/usr/lib");
894 this->options_.add_sysroot();
896 // Ensure options don't contradict each other and are otherwise kosher.
897 this->normalize_options();
900 // Extract an option argument for a special option. LONGNAME is the
901 // long name of the option. This sets *PRET to the return value for
902 // the special function handler to skip to the next option.
905 Command_line::get_special_argument(const char* longname, int argc, char** argv,
906 const char* arg, bool long_option,
911 size_t longlen = strlen(longname);
912 gold_assert(strncmp(arg, longname, longlen) == 0);
921 gold_assert(*arg == '\0');
940 this->usage(_("missing argument"), arg);
943 // Ensure options don't contradict each other and are otherwise kosher.
946 Command_line::normalize_options()
948 // If the user specifies both -s and -r, convert the -s as -S.
949 // -r requires us to keep externally visible symbols!
950 if (this->options_.strip_all() && this->options_.is_relocatable())
952 // Clears the strip_all() status, replacing it with strip_debug().
953 this->options_.set_strip_debug();
956 // FIXME: we can/should be doing a lot more sanity checking here.
960 // Apply a command line option.
963 Command_line::apply_option(const options::One_option& opt,
968 if (opt.general_noarg)
969 (this->options_.*(opt.general_noarg))();
970 else if (opt.dependent_noarg)
971 (this->position_options_.*(opt.dependent_noarg))();
978 (this->options_.*(opt.general_arg))(arg);
979 else if (opt.dependent_arg)
980 (this->position_options_.*(opt.dependent_arg))(arg);
986 // Add an input file or library.
989 Command_line::add_file(const char* name, bool is_lib)
991 Input_file_argument file(name, is_lib, "", this->position_options_);
992 this->inputs_.add_file(file);
995 // Handle the -l option, which requires special treatment.
998 Command_line::process_l_option(int argc, char** argv, char* arg,
1002 const char* libname = this->get_special_argument("library", argc, argv, arg,
1004 this->add_file(libname, true);
1008 // Handle the --start-group option.
1011 Command_line::start_group(const char* arg)
1013 if (this->inputs_.in_group())
1014 this->usage(_("may not nest groups"), arg);
1015 this->inputs_.start_group();
1018 // Handle the --end-group option.
1021 Command_line::end_group(const char* arg)
1023 if (!this->inputs_.in_group())
1024 this->usage(_("group end without group start"), arg);
1025 this->inputs_.end_group();
1028 // Report a usage error. */
1031 Command_line::usage()
1034 _("%s: use the --help option for usage information\n"),
1036 ::exit(EXIT_FAILURE);
1040 Command_line::usage(const char* msg, const char *opt)
1044 program_name, opt, msg);
1049 Command_line::usage(const char* msg, char opt)
1053 program_name, opt, msg);
1057 } // End namespace gold.