1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008 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"
38 // The information we keep for a single command line option.
40 struct options::One_option
42 // The single character option name, or '\0' if this is only a long
46 // The long option name, or NULL if this is only a short option.
47 const char* long_option;
49 // Description of the option for --help output, or NULL if there is none.
52 // How to print the option name in --help output, or NULL to use the
54 const char* help_output;
56 // Long option dash control. This is ignored if long_option is
60 // Long option normally takes one dash; two dashes are also
63 // Long option normally takes two dashes; one dash is also
66 // Long option always takes two dashes.
70 // Function for special handling, or NULL. Returns the number of
71 // arguments to skip. This will normally be at least 1, but it may
72 // be 0 if this function changes *argv. ARG points to the location
73 // in *ARGV where the option starts, which may be helpful for a
75 int (*special)(int argc, char** argv, char *arg, bool long_option,
78 // If this is a position independent option which does not take an
79 // argument, this is the member function to call to record it.
80 void (General_options::*general_noarg)();
82 // If this is a position independent function which takes an
83 // argument, this is the member function to call to record it.
84 void (General_options::*general_arg)(const char*);
86 // If this is a position dependent option which does not take an
87 // argument, this is the member function to call to record it.
88 void (Position_dependent_options::*dependent_noarg)();
90 // If this is a position dependent option which takes an argument,
91 // this is the member function to record it.
92 void (Position_dependent_options::*dependent_arg)(const char*);
94 // Return whether this option takes an argument.
96 takes_argument() const
97 { return this->general_arg != NULL || this->dependent_arg != NULL; }
100 // We have a separate table for -z options.
102 struct options::One_z_option
104 // The name of the option.
107 // The member function in General_options called to record it.
108 void (General_options::*set)();
111 // We have a separate table for --debug options.
113 struct options::One_debug_option
115 // The name of the option.
118 // The flags to turn on.
119 unsigned int debug_flags;
122 class options::Command_line_options
125 static const One_option options[];
126 static const int options_size;
127 static const One_z_option z_options[];
128 static const int z_options_size;
129 static const One_debug_option debug_options[];
130 static const int debug_options_size;
133 } // End namespace gold.
138 // Handle the special -l option, which adds an input file.
141 library(int argc, char** argv, char* arg, bool long_option,
142 gold::Command_line* cmdline)
144 return cmdline->process_l_option(argc, argv, arg, long_option);
147 // Handle the special -T/--script option, which reads a linker script.
150 invoke_script(int argc, char** argv, char* arg, bool long_option,
151 gold::Command_line* cmdline)
154 const char* script_name = cmdline->get_special_argument("script", argc, argv,
157 if (!read_commandline_script(script_name, cmdline))
158 gold::gold_fatal(_("unable to parse script file %s"), script_name);
162 // Handle the special --version-script option, which reads a version script.
165 invoke_version_script(int argc, char** argv, char* arg, bool long_option,
166 gold::Command_line* cmdline)
169 const char* script_name = cmdline->get_special_argument("version-script",
173 if (!read_version_script(script_name, cmdline))
174 gold::gold_fatal(_("unable to parse version script file %s"), script_name);
178 // Handle the special --start-group option.
181 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
183 cmdline->start_group(arg);
187 // Handle the special --end-group option.
190 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
192 cmdline->end_group(arg);
196 // Report usage information for ld --help, and exit.
199 help(int, char**, char*, bool, gold::Command_line*)
201 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
203 const int options_size = gold::options::Command_line_options::options_size;
204 const gold::options::One_option* options =
205 gold::options::Command_line_options::options;
206 for (int i = 0; i < options_size; ++i)
208 if (options[i].doc == NULL)
218 if (options[j].help_output != NULL)
225 printf(options[j].help_output);
226 len += std::strlen(options[i].help_output);
231 if (options[j].short_option != '\0')
238 printf("-%c", options[j].short_option);
243 if (options[j].long_option != NULL)
250 if (options[j].dash == gold::options::One_option::ONE_DASH)
260 printf("%s", options[j].long_option);
261 len += std::strlen(options[j].long_option);
267 while (j < options_size && options[j].doc == NULL);
274 for (; len < 30; ++len)
277 std::puts(options[i].doc);
280 ::exit(EXIT_SUCCESS);
285 // Report version information.
288 version(int, char**, char* opt, bool, gold::Command_line*)
290 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
291 ::exit(EXIT_SUCCESS);
295 // If the default sysroot is relocatable, try relocating it based on
299 get_relative_sysroot(const char* from)
301 char* path = make_relative_prefix(gold::program_name, from,
306 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
314 // Return the default sysroot. This is set by the --with-sysroot
315 // option to configure.
318 get_default_sysroot()
320 const char* sysroot = TARGET_SYSTEM_ROOT;
321 if (*sysroot == '\0')
324 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
326 char* path = get_relative_sysroot (BINDIR);
328 path = get_relative_sysroot (TOOLBINDIR);
331 std::string ret = path;
340 } // End anonymous namespace.
345 // Helper macros used to specify the options. We could also do this
346 // using constructors, but then g++ would generate code to initialize
347 // the array. We want the array to be initialized statically so that
348 // we get better startup time.
350 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
351 { short_option, long_option, doc, help, options::One_option::dash, \
352 NULL, func, NULL, NULL, NULL }
353 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
354 { short_option, long_option, doc, help, options::One_option::dash, \
355 NULL, NULL, func, NULL, NULL }
356 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
357 { short_option, long_option, doc, help, options::One_option::dash, \
358 NULL, NULL, NULL, func, NULL }
359 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
360 { short_option, long_option, doc, help, options::One_option::dash, \
361 NULL, NULL, NULL, NULL, func }
362 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
363 { short_option, long_option, doc, help, options::One_option::dash, \
364 func, NULL, NULL, NULL, NULL }
366 // Here is the actual list of options which we accept.
368 const options::One_option
369 options::Command_line_options::options[] =
371 GENERAL_NOARG('\0', "allow-shlib-undefined",
372 N_("Allow unresolved references in shared libraries"),
374 &General_options::set_allow_shlib_undefined),
375 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
376 N_("Do not allow unresolved references in shared libraries"),
378 &General_options::set_no_allow_shlib_undefined),
379 POSDEP_NOARG('\0', "as-needed",
380 N_("Only set DT_NEEDED for dynamic libs if used"),
381 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
382 POSDEP_NOARG('\0', "no-as-needed",
383 N_("Always DT_NEEDED for dynamic libs (default)"),
384 NULL, TWO_DASHES, &Position_dependent_options::clear_as_needed),
385 POSDEP_NOARG('\0', "Bdynamic",
386 N_("-l searches for shared libraries"),
388 &Position_dependent_options::set_dynamic_search),
389 POSDEP_NOARG('\0', "Bstatic",
390 N_("-l does not search for shared libraries"),
392 &Position_dependent_options::set_static_search),
393 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
394 NULL, ONE_DASH, &General_options::set_symbolic),
396 # define ZLIB_STR ",zlib"
400 GENERAL_ARG('\0', "compress-debug-sections",
401 N_("Compress .debug_* sections in the output file "
402 "(default is none)"),
403 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
405 &General_options::set_compress_debug_sections),
406 GENERAL_ARG('\0', "defsym", N_("Define a symbol"),
407 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES,
408 &General_options::define_symbol),
409 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
410 NULL, TWO_DASHES, &General_options::set_demangle),
411 GENERAL_NOARG('\0', "no-demangle",
412 N_("Do not demangle C++ symbols in log messages"),
413 NULL, TWO_DASHES, &General_options::clear_demangle),
414 GENERAL_NOARG('\0', "detect-odr-violations",
415 N_("Try to detect violations of the One Definition Rule"),
416 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
417 GENERAL_ARG('e', "entry", N_("Set program start address"),
418 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
419 &General_options::set_entry),
420 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
421 NULL, TWO_DASHES, &General_options::set_export_dynamic),
422 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
423 NULL, TWO_DASHES, &General_options::set_create_eh_frame_hdr),
424 GENERAL_ARG('h', "soname", N_("Set shared library name"),
425 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
426 &General_options::set_soname),
427 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
428 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
429 &General_options::set_dynamic_linker),
430 SPECIAL('l', "library", N_("Search for library LIBNAME"),
431 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
433 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
434 N_("-L DIR, --library-path DIR"), TWO_DASHES,
435 &General_options::add_to_search_path),
436 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
437 &General_options::ignore),
438 GENERAL_ARG('o', "output", N_("Set output file name"),
439 N_("-o FILE, --output FILE"), TWO_DASHES,
440 &General_options::set_output_file_name),
441 GENERAL_ARG('O', NULL, N_("Optimize output file size"),
442 N_("-O level"), ONE_DASH,
443 &General_options::set_optimization_level),
444 GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
445 ONE_DASH, &General_options::set_relocatable),
446 GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
447 N_("-R DIR, -rpath DIR"), ONE_DASH,
448 &General_options::add_to_rpath),
449 GENERAL_ARG('\0', "rpath-link",
450 N_("Add DIR to link time shared library search path"),
451 N_("--rpath-link DIR"), TWO_DASHES,
452 &General_options::add_to_rpath_link),
453 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
454 TWO_DASHES, &General_options::set_strip_all),
455 GENERAL_NOARG('\0', "strip-debug-gdb",
456 N_("Strip debug symbols that are unused by gdb "
457 "(at least versions <= 6.7)"),
458 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
459 // This must come after -Sdebug since it's a prefix of it.
460 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
461 TWO_DASHES, &General_options::set_strip_debug),
462 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
463 NULL, ONE_DASH, &General_options::set_shared),
464 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
465 NULL, ONE_DASH, &General_options::set_static),
466 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
467 NULL, TWO_DASHES, &General_options::set_stats),
468 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
469 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
470 GENERAL_ARG('\0', "Ttext", N_("Set the address of the .text section"),
471 N_("-Ttext ADDRESS"), ONE_DASH,
472 &General_options::set_text_segment_address),
473 // This must come after -Ttext since it's a prefix of it.
474 SPECIAL('T', "script", N_("Read linker script"),
475 N_("-T FILE, --script FILE"), TWO_DASHES,
477 SPECIAL('\0', "version-script", N_("Read version script"),
478 N_("--version-script FILE"), TWO_DASHES,
479 &invoke_version_script),
480 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
481 NULL, TWO_DASHES, &General_options::set_threads),
482 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
483 NULL, TWO_DASHES, &General_options::clear_threads),
484 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
485 N_("--thread-count COUNT"), TWO_DASHES,
486 &General_options::set_thread_count),
487 GENERAL_ARG('\0', "thread-count-initial",
488 N_("Number of threads to use in initial pass"),
489 N_("--thread-count-initial COUNT"), TWO_DASHES,
490 &General_options::set_thread_count_initial),
491 GENERAL_ARG('\0', "thread-count-middle",
492 N_("Number of threads to use in middle pass"),
493 N_("--thread-count-middle COUNT"), TWO_DASHES,
494 &General_options::set_thread_count_middle),
495 GENERAL_ARG('\0', "thread-count-final",
496 N_("Number of threads to use in final pass"),
497 N_("--thread-count-final COUNT"), TWO_DASHES,
498 &General_options::set_thread_count_final),
499 POSDEP_NOARG('\0', "whole-archive",
500 N_("Include all archive contents"),
502 &Position_dependent_options::set_whole_archive),
503 POSDEP_NOARG('\0', "no-whole-archive",
504 N_("Include only needed archive contents"),
506 &Position_dependent_options::clear_whole_archive),
508 GENERAL_ARG('z', NULL,
509 N_("Subcommands as follows:\n\
510 -z execstack Mark output as requiring executable stack\n\
511 -z noexecstack Mark output as not requiring executable stack"),
512 N_("-z SUBCOMMAND"), ONE_DASH,
513 &General_options::handle_z_option),
515 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
516 TWO_DASHES, &start_group),
517 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
518 TWO_DASHES, &end_group),
519 SPECIAL('\0', "help", N_("Report usage information"), NULL,
521 SPECIAL('v', "version", N_("Report version information"), NULL,
522 TWO_DASHES, &version),
523 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task)"),
524 N_("--debug=TYPE"), TWO_DASHES,
525 &General_options::handle_debug_option)
528 const int options::Command_line_options::options_size =
529 sizeof (options) / sizeof (options[0]);
533 const options::One_z_option
534 options::Command_line_options::z_options[] =
536 { "execstack", &General_options::set_execstack },
537 { "noexecstack", &General_options::set_noexecstack },
540 const int options::Command_line_options::z_options_size =
541 sizeof(z_options) / sizeof(z_options[0]);
543 // The --debug options.
545 const options::One_debug_option
546 options::Command_line_options::debug_options[] =
548 { "all", DEBUG_ALL },
549 { "task", DEBUG_TASK },
552 const int options::Command_line_options::debug_options_size =
553 sizeof(debug_options) / sizeof(debug_options[0]);
555 // The default values for the general options.
557 General_options::General_options(Script_options* script_options)
558 : export_dynamic_(false),
560 dynamic_linker_(NULL),
562 optimization_level_(0),
563 output_file_name_("a.out"),
564 is_relocatable_(false),
566 allow_shlib_undefined_(false),
568 compress_debug_sections_(NO_COMPRESSION),
569 detect_odr_violations_(false),
570 create_eh_frame_hdr_(false),
577 text_segment_address_(-1U), // -1 indicates value not set by user
579 thread_count_initial_(0),
580 thread_count_middle_(0),
581 thread_count_final_(0),
582 execstack_(EXECSTACK_FROM_INPUT),
584 script_options_(script_options)
586 // We initialize demangle_ based on the environment variable
587 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
588 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
589 // environment. Acting the same way here lets us provide the same
590 // interface by default.
591 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
594 // Handle the --defsym option.
597 General_options::define_symbol(const char* arg)
599 this->script_options_->define_symbol(arg);
602 // Handle the -z option.
605 General_options::handle_z_option(const char* arg)
607 const int z_options_size = options::Command_line_options::z_options_size;
608 const gold::options::One_z_option* z_options =
609 gold::options::Command_line_options::z_options;
610 for (int i = 0; i < z_options_size; ++i)
612 if (strcmp(arg, z_options[i].name) == 0)
614 (this->*(z_options[i].set))();
619 fprintf(stderr, _("%s: unrecognized -z subcommand: %s\n"),
621 ::exit(EXIT_FAILURE);
624 // Handle the --debug option.
627 General_options::handle_debug_option(const char* arg)
629 const int debug_options_size =
630 options::Command_line_options::debug_options_size;
631 const gold::options::One_debug_option* debug_options =
632 options::Command_line_options::debug_options;
633 for (int i = 0; i < debug_options_size; ++i)
635 if (strcmp(arg, debug_options[i].name) == 0)
637 this->set_debug(debug_options[i].debug_flags);
642 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
644 ::exit(EXIT_FAILURE);
647 // Add the sysroot, if any, to the search paths.
650 General_options::add_sysroot()
652 if (this->sysroot_.empty())
654 this->sysroot_ = get_default_sysroot();
655 if (this->sysroot_.empty())
659 const char* sysroot = this->sysroot_.c_str();
660 char* canonical_sysroot = lrealpath(sysroot);
662 for (Dir_list::iterator p = this->search_path_.begin();
663 p != this->search_path_.end();
665 p->add_sysroot(sysroot, canonical_sysroot);
667 free(canonical_sysroot);
670 // The default values for the position dependent options.
672 Position_dependent_options::Position_dependent_options()
673 : do_static_search_(false),
675 include_whole_archive_(false)
679 // Search_directory methods.
681 // This is called if we have a sysroot. Apply the sysroot if
682 // appropriate. Record whether the directory is in the sysroot.
685 Search_directory::add_sysroot(const char* sysroot,
686 const char* canonical_sysroot)
688 gold_assert(*sysroot != '\0');
689 if (this->put_in_sysroot_)
691 if (!IS_DIR_SEPARATOR(this->name_[0])
692 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
693 this->name_ = '/' + this->name_;
694 this->name_ = sysroot + this->name_;
695 this->is_in_sysroot_ = true;
699 // Check whether this entry is in the sysroot. To do this
700 // correctly, we need to use canonical names. Otherwise we will
701 // get confused by the ../../.. paths that gcc tends to use.
702 char* canonical_name = lrealpath(this->name_.c_str());
703 int canonical_name_len = strlen(canonical_name);
704 int canonical_sysroot_len = strlen(canonical_sysroot);
705 if (canonical_name_len > canonical_sysroot_len
706 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
708 canonical_name[canonical_sysroot_len] = '\0';
709 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
710 this->is_in_sysroot_ = true;
712 free(canonical_name);
716 // Input_arguments methods.
718 // Add a file to the list.
721 Input_arguments::add_file(const Input_file_argument& file)
723 if (!this->in_group_)
724 this->input_argument_list_.push_back(Input_argument(file));
727 gold_assert(!this->input_argument_list_.empty());
728 gold_assert(this->input_argument_list_.back().is_group());
729 this->input_argument_list_.back().group()->add_file(file);
736 Input_arguments::start_group()
738 gold_assert(!this->in_group_);
739 Input_file_group* group = new Input_file_group();
740 this->input_argument_list_.push_back(Input_argument(group));
741 this->in_group_ = true;
747 Input_arguments::end_group()
749 gold_assert(this->in_group_);
750 this->in_group_ = false;
753 // Command_line options.
755 Command_line::Command_line(Script_options* script_options)
756 : options_(script_options), position_options_(), inputs_()
760 // Process the command line options. For process_one_option,
761 // i is the index of argv to process next, and the return value
762 // is the index of the next option to process (i+1 or i+2, or argc
763 // to indicate processing is done). no_more_options is set to true
764 // if (and when) "--" is seen as an option.
767 Command_line::process_one_option(int argc, char** argv, int i,
768 bool* no_more_options)
770 const int options_size = options::Command_line_options::options_size;
771 const options::One_option* options = options::Command_line_options::options;
772 gold_assert(i < argc);
774 if (argv[i][0] != '-' || *no_more_options)
776 this->add_file(argv[i], false);
780 // Option starting with '-'.
782 if (argv[i][1] == '-')
785 if (argv[i][2] == '\0')
787 *no_more_options = true;
792 // Look for a long option match.
793 char* opt = argv[i] + dashes;
796 char* arg = strchr(opt, '=');
797 bool argument_with_equals = arg != NULL;
803 else if (i + 1 < argc)
810 for (j = 0; j < options_size; ++j)
812 if (options[j].long_option != NULL
815 != options::One_option::EXACTLY_TWO_DASHES))
816 && first == options[j].long_option[0]
817 && strcmp(opt, options[j].long_option) == 0)
819 if (options[j].special)
821 // Restore the '=' we clobbered above.
822 if (arg != NULL && skiparg == 0)
824 i += options[j].special(argc - i, argv + i, opt, true, this);
828 if (!options[j].takes_argument())
830 if (argument_with_equals)
831 this->usage(_("unexpected argument"), argv[i]);
838 this->usage(_("missing argument"), argv[i]);
840 this->apply_option(options[j], arg);
846 if (j < options_size)
849 // If we saw two dashes, we needed to have seen a long option.
851 this->usage(_("unknown option"), argv[i]);
853 // Look for a short option match. There may be more than one
854 // short option in a given argument.
856 char* s = argv[i] + 1;
858 while (*s != '\0' && !done)
862 for (j = 0; j < options_size; ++j)
864 if (options[j].short_option == opt)
866 if (options[j].special)
868 // Undo the argument skip done above.
870 i += options[j].special(argc - i, argv + i, s, false,
877 if (options[j].takes_argument())
890 this->usage(_("missing argument"), opt);
892 this->apply_option(options[j], arg);
898 if (j >= options_size)
899 this->usage(_("unknown option"), *s);
908 Command_line::process(int argc, char** argv)
910 bool no_more_options = false;
913 i = process_one_option(argc, argv, i, &no_more_options);
915 if (this->inputs_.in_group())
917 fprintf(stderr, _("%s: missing group end\n"), program_name);
921 // FIXME: We should only do this when configured in native mode.
922 this->options_.add_to_search_path_with_sysroot("/lib");
923 this->options_.add_to_search_path_with_sysroot("/usr/lib");
925 this->options_.add_sysroot();
927 // Ensure options don't contradict each other and are otherwise kosher.
928 this->normalize_options();
931 // Extract an option argument for a special option. LONGNAME is the
932 // long name of the option. This sets *PRET to the return value for
933 // the special function handler to skip to the next option.
936 Command_line::get_special_argument(const char* longname, int argc, char** argv,
937 const char* arg, bool long_option,
942 size_t longlen = strlen(longname);
943 gold_assert(strncmp(arg, longname, longlen) == 0);
952 gold_assert(*arg == '\0');
971 this->usage(_("missing argument"), arg);
974 // Ensure options don't contradict each other and are otherwise kosher.
977 Command_line::normalize_options()
979 // If the user specifies both -s and -r, convert the -s as -S.
980 // -r requires us to keep externally visible symbols!
981 if (this->options_.strip_all() && this->options_.is_relocatable())
983 // Clears the strip_all() status, replacing it with strip_debug().
984 this->options_.set_strip_debug();
987 // FIXME: we can/should be doing a lot more sanity checking here.
991 // Apply a command line option.
994 Command_line::apply_option(const options::One_option& opt,
999 if (opt.general_noarg)
1000 (this->options_.*(opt.general_noarg))();
1001 else if (opt.dependent_noarg)
1002 (this->position_options_.*(opt.dependent_noarg))();
1008 if (opt.general_arg)
1009 (this->options_.*(opt.general_arg))(arg);
1010 else if (opt.dependent_arg)
1011 (this->position_options_.*(opt.dependent_arg))(arg);
1017 // Add an input file or library.
1020 Command_line::add_file(const char* name, bool is_lib)
1022 Input_file_argument file(name, is_lib, "", this->position_options_);
1023 this->inputs_.add_file(file);
1026 // Handle the -l option, which requires special treatment.
1029 Command_line::process_l_option(int argc, char** argv, char* arg,
1033 const char* libname = this->get_special_argument("library", argc, argv, arg,
1035 this->add_file(libname, true);
1039 // Handle the --start-group option.
1042 Command_line::start_group(const char* arg)
1044 if (this->inputs_.in_group())
1045 this->usage(_("may not nest groups"), arg);
1046 this->inputs_.start_group();
1049 // Handle the --end-group option.
1052 Command_line::end_group(const char* arg)
1054 if (!this->inputs_.in_group())
1055 this->usage(_("group end without group start"), arg);
1056 this->inputs_.end_group();
1059 // Report a usage error. */
1062 Command_line::usage()
1065 _("%s: use the --help option for usage information\n"),
1067 ::exit(EXIT_FAILURE);
1071 Command_line::usage(const char* msg, const char *opt)
1075 program_name, opt, msg);
1080 Command_line::usage(const char* msg, char opt)
1084 program_name, opt, msg);
1088 } // End namespace gold.