1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008, 2009 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.
32 #include "filenames.h"
33 #include "libiberty.h"
35 #include "../bfd/bfdver.h"
39 #include "target-select.h"
47 Position_dependent_options::default_options_;
52 // This flag is TRUE if we should register the command-line options as they
53 // are constructed. It is set after contruction of the options within
54 // class Position_dependent_options.
55 static bool ready_to_register = false;
57 // This global variable is set up as General_options is constructed.
58 static std::vector<const One_option*> registered_options;
60 // These are set up at the same time -- the variables that accept one
61 // dash, two, or require -z. A single variable may be in more than
62 // one of thes data structures.
63 typedef Unordered_map<std::string, One_option*> Option_map;
64 static Option_map* long_options = NULL;
65 static One_option* short_options[128];
68 One_option::register_option()
70 if (!ready_to_register)
73 registered_options.push_back(this);
75 // We can't make long_options a static Option_map because we can't
76 // guarantee that will be initialized before register_option() is
78 if (long_options == NULL)
79 long_options = new Option_map;
81 // TWO_DASHES means that two dashes are preferred, but one is ok too.
82 if (!this->longname.empty())
83 (*long_options)[this->longname] = this;
85 const int shortname_as_int = static_cast<int>(this->shortname);
86 gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
87 if (this->shortname != '\0')
89 gold_assert(short_options[shortname_as_int] == NULL);
90 short_options[shortname_as_int] = this;
95 One_option::print() const
100 if (this->shortname != '\0')
102 len += printf("-%c", this->shortname);
105 // -z takes long-names only.
106 gold_assert(this->dashes != DASH_Z);
107 len += printf(" %s", gettext(this->helparg));
111 if (!this->longname.empty()
112 && !(this->longname[0] == this->shortname
113 && this->longname[1] == '\0'))
117 switch (this->dashes)
119 case options::ONE_DASH: case options::EXACTLY_ONE_DASH:
122 case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES:
125 case options::DASH_Z:
126 len += printf("-z ");
131 len += printf("%s", this->longname.c_str());
134 // For most options, we print "--frob FOO". But for -z
135 // we print "-z frob=FOO".
136 len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ',
137 gettext(this->helparg));
146 for (; len < 30; ++len)
149 // TODO: if we're boolean, add " (default)" when appropriate.
150 printf("%s\n", gettext(this->helpstring));
156 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
158 std::vector<const One_option*>::const_iterator it;
159 for (it = registered_options.begin(); it != registered_options.end(); ++it)
162 // config.guess and libtool.m4 look in ld --help output for the
163 // string "supported targets".
164 printf(_("%s: supported targets:"), gold::program_name);
165 std::vector<const char*> supported_names;
166 gold::supported_target_names(&supported_names);
167 for (std::vector<const char*>::const_iterator p = supported_names.begin();
168 p != supported_names.end();
173 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
174 const char* report = REPORT_BUGS_TO;
176 printf(_("Report bugs to %s\n"), report);
179 // For bool, arg will be NULL (boolean options take no argument);
180 // we always just set to true.
182 parse_bool(const char*, const char*, bool* retval)
188 parse_uint(const char* option_name, const char* arg, int* retval)
191 *retval = strtol(arg, &endptr, 0);
192 if (*endptr != '\0' || retval < 0)
193 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
198 parse_uint64(const char* option_name, const char* arg, uint64_t *retval)
201 *retval = strtoull(arg, &endptr, 0);
203 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
208 parse_double(const char* option_name, const char* arg, double* retval)
211 *retval = strtod(arg, &endptr);
213 gold_fatal(_("%s: invalid option value "
214 "(expected a floating point number): %s"),
219 parse_string(const char* option_name, const char* arg, const char** retval)
222 gold_fatal(_("%s: must take a non-empty argument"), option_name);
227 parse_optional_string(const char*, const char* arg, const char** retval)
233 parse_dirlist(const char*, const char* arg, Dir_list* retval)
235 retval->push_back(Search_directory(arg, false));
239 parse_set(const char*, const char* arg, String_set* retval)
241 retval->insert(std::string(arg));
245 parse_choices(const char* option_name, const char* arg, const char** retval,
246 const char* choices[], int num_choices)
248 for (int i = 0; i < num_choices; i++)
249 if (strcmp(choices[i], arg) == 0)
255 // If we get here, the user did not enter a valid choice, so we die.
256 std::string choices_list;
257 for (int i = 0; i < num_choices; i++)
259 choices_list += choices[i];
260 if (i != num_choices - 1)
261 choices_list += ", ";
263 gold_fatal(_("%s: must take one of the following arguments: %s"),
264 option_name, choices_list.c_str());
267 } // End namespace options.
269 // Define the handler for "special" options (set via DEFINE_special).
272 General_options::parse_help(const char*, const char*, Command_line*)
275 ::exit(EXIT_SUCCESS);
279 General_options::parse_version(const char* opt, const char*, Command_line*)
281 gold::print_version(opt[0] == '-' && opt[1] == 'v');
282 ::exit(EXIT_SUCCESS);
286 General_options::parse_V(const char*, const char*, Command_line*)
288 gold::print_version(true);
289 this->printed_version_ = true;
290 printf(_(" Supported targets:\n"));
291 std::vector<const char*> supported_names;
292 gold::supported_target_names(&supported_names);
293 for (std::vector<const char*>::const_iterator p = supported_names.begin();
294 p != supported_names.end();
300 General_options::parse_defsym(const char*, const char* arg,
301 Command_line* cmdline)
303 cmdline->script_options().define_symbol(arg);
307 General_options::parse_incremental_changed(const char*, const char*,
310 this->implicit_incremental_ = true;
311 this->incremental_disposition_ = INCREMENTAL_CHANGED;
315 General_options::parse_incremental_unchanged(const char*, const char*,
318 this->implicit_incremental_ = true;
319 this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
323 General_options::parse_incremental_unknown(const char*, const char*,
326 this->implicit_incremental_ = true;
327 this->incremental_disposition_ = INCREMENTAL_CHECK;
331 General_options::parse_library(const char*, const char* arg,
332 Command_line* cmdline)
334 Input_file_argument file(arg, true, "", false, *this);
335 cmdline->inputs().add_file(file);
338 #ifdef ENABLE_PLUGINS
340 General_options::parse_plugin(const char*, const char* arg,
343 this->add_plugin(arg);
346 // Parse --plugin-opt.
349 General_options::parse_plugin_opt(const char*, const char* arg,
352 this->add_plugin_option(arg);
354 #endif // ENABLE_PLUGINS
357 General_options::parse_R(const char* option, const char* arg,
358 Command_line* cmdline)
361 if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
362 this->add_to_rpath(arg);
364 this->parse_just_symbols(option, arg, cmdline);
368 General_options::parse_just_symbols(const char*, const char* arg,
369 Command_line* cmdline)
371 Input_file_argument file(arg, false, "", true, *this);
372 cmdline->inputs().add_file(file);
376 General_options::parse_static(const char*, const char*, Command_line*)
378 this->set_static(true);
382 General_options::parse_script(const char*, const char* arg,
383 Command_line* cmdline)
385 if (!read_commandline_script(arg, cmdline))
386 gold::gold_fatal(_("unable to parse script file %s"), arg);
390 General_options::parse_version_script(const char*, const char* arg,
391 Command_line* cmdline)
393 if (!read_version_script(arg, cmdline))
394 gold::gold_fatal(_("unable to parse version script file %s"), arg);
398 General_options::parse_dynamic_list(const char*, const char* arg,
399 Command_line* cmdline)
401 if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
402 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
406 General_options::parse_start_group(const char*, const char*,
407 Command_line* cmdline)
409 cmdline->inputs().start_group();
413 General_options::parse_end_group(const char*, const char*,
414 Command_line* cmdline)
416 cmdline->inputs().end_group();
419 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
420 // of names seperated by commas or colons and puts them in a linked list.
421 // We implement the same parsing of names here but store names in an unordered
422 // map to speed up searching of names.
425 General_options::parse_exclude_libs(const char*, const char* arg,
432 size_t length = strcspn(p, ",:");
433 this->excluded_libs_.insert(std::string(p, length));
434 p += (p[length] ? length + 1 : length);
438 // The checking logic is based on the function check_excluded_libs() in
439 // ld/ldlang.c of GNU ld but our implementation is different because we use
440 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
441 // ld searches sequentially in the excluded libs list. For a given archive,
442 // a match is found if the archive's name matches exactly one of the list
443 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
444 // one of the list entry. An entry "ALL" in the list is considered as a
445 // wild-card and matches any given name.
448 General_options::check_excluded_libs (const std::string &name) const
450 Unordered_set<std::string>::const_iterator p;
452 // Exit early for the most common case.
453 if (excluded_libs_.empty())
456 // If we see "ALL", all archives are excluded from automatic export.
457 p = excluded_libs_.find(std::string("ALL"));
458 if (p != excluded_libs_.end())
461 // First strip off any directories in name.
462 const char *basename = lbasename(name.c_str());
464 // Try finding an exact match.
465 p = excluded_libs_.find(std::string(basename));
466 if (p != excluded_libs_.end())
469 // Try matching NAME without ".a" at the end.
470 size_t length = strlen(basename);
472 && (basename[length - 2] == '.')
473 && (basename[length - 1] == 'a'))
475 p = excluded_libs_.find(std::string(basename, length - 2));
476 if (p != excluded_libs_.end())
483 // Recognize input and output target names. The GNU linker accepts
484 // these with --format and --oformat. This code is intended to be
485 // minimally compatible. In practice for an ELF target this would be
486 // the same target as the input files; that name always start with
487 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
490 General_options::Object_format
491 General_options::string_to_object_format(const char* arg)
493 if (strncmp(arg, "elf", 3) == 0)
494 return gold::General_options::OBJECT_FORMAT_ELF;
495 else if (strcmp(arg, "binary") == 0)
496 return gold::General_options::OBJECT_FORMAT_BINARY;
499 gold::gold_error(_("format '%s' not supported; treating as elf "
500 "(supported formats: elf, binary)"),
502 return gold::General_options::OBJECT_FORMAT_ELF;
506 } // End namespace gold.
515 _("%s: use the --help option for usage information\n"),
517 ::exit(EXIT_FAILURE);
521 usage(const char* msg, const char *opt)
525 gold::program_name, opt, msg);
529 // If the default sysroot is relocatable, try relocating it based on
533 get_relative_sysroot(const char* from)
535 char* path = make_relative_prefix(gold::program_name, from,
540 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
548 // Return the default sysroot. This is set by the --with-sysroot
549 // option to configure. Note we do not free the return value of
550 // get_relative_sysroot, which is a small memory leak, but is
551 // necessary since we store this pointer directly in General_options.
554 get_default_sysroot()
556 const char* sysroot = TARGET_SYSTEM_ROOT;
557 if (*sysroot == '\0')
560 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
562 char* path = get_relative_sysroot(BINDIR);
564 path = get_relative_sysroot(TOOLBINDIR);
572 // Parse a long option. Such options have the form
573 // <-|--><option>[=arg]. If "=arg" is not present but the option
574 // takes an argument, the next word is taken to the be the argument.
575 // If equals_only is set, then only the <option>=<arg> form is
576 // accepted, not the <option><space><arg> form. Returns a One_option
577 // struct or NULL if argv[i] cannot be parsed as a long option. In
578 // the not-NULL case, *arg is set to the option's argument (NULL if
579 // the option takes no argument), and *i is advanced past this option.
580 // NOTE: it is safe for argv and arg to point to the same place.
581 gold::options::One_option*
582 parse_long_option(int argc, const char** argv, bool equals_only,
583 const char** arg, int* i)
585 const char* const this_argv = argv[*i];
587 const char* equals = strchr(this_argv, '=');
588 const char* option_start = this_argv + strspn(this_argv, "-");
589 std::string option(option_start,
590 equals ? equals - option_start : strlen(option_start));
592 gold::options::Option_map::iterator it
593 = gold::options::long_options->find(option);
594 if (it == gold::options::long_options->end())
597 gold::options::One_option* retval = it->second;
599 // If the dash-count doesn't match, we fail.
600 if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
602 if (retval->dashes != gold::options::DASH_Z)
605 else if (this_argv[1] != '-') // one dash
607 if (retval->dashes != gold::options::ONE_DASH
608 && retval->dashes != gold::options::EXACTLY_ONE_DASH
609 && retval->dashes != gold::options::TWO_DASHES)
612 else // two dashes (or more!)
614 if (retval->dashes != gold::options::TWO_DASHES
615 && retval->dashes != gold::options::EXACTLY_TWO_DASHES
616 && retval->dashes != gold::options::ONE_DASH)
620 // Now that we know the option is good (or else bad in a way that
621 // will cause us to die), increment i to point past this argv.
624 // Figure out the option's argument, if any.
625 if (!retval->takes_argument())
628 usage(_("unexpected argument"), this_argv);
636 else if (retval->takes_optional_argument())
637 *arg = retval->default_value;
638 else if (*i < argc && !equals_only)
641 usage(_("missing argument"), this_argv);
647 // Parse a short option. Such options have the form -<option>[arg].
648 // If "arg" is not present but the option takes an argument, the next
649 // word is taken to the be the argument. If the option does not take
650 // an argument, it may be followed by another short option. Returns a
651 // One_option struct or NULL if argv[i] cannot be parsed as a short
652 // option. In the not-NULL case, *arg is set to the option's argument
653 // (NULL if the option takes no argument), and *i is advanced past
654 // this option. This function keeps *i the same if we parsed a short
655 // option that does not take an argument, that looks to be followed by
656 // another short option in the same word.
657 gold::options::One_option*
658 parse_short_option(int argc, const char** argv, int pos_in_argv_i,
659 const char** arg, int* i)
661 const char* const this_argv = argv[*i];
663 if (this_argv[0] != '-')
666 // We handle -z as a special case.
667 static gold::options::One_option dash_z("", gold::options::DASH_Z,
668 'z', "", NULL, "Z-OPTION", false,
670 gold::options::One_option* retval = NULL;
671 if (this_argv[pos_in_argv_i] == 'z')
675 const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
676 if (char_as_int > 0 && char_as_int < 128)
677 retval = gold::options::short_options[char_as_int];
683 // Figure out the option's argument, if any.
684 if (!retval->takes_argument())
687 // We only advance past this argument if it's the only one in argv.
688 if (this_argv[pos_in_argv_i + 1] == '\0')
693 // If we take an argument, we'll eat up this entire argv entry.
695 if (this_argv[pos_in_argv_i + 1] != '\0')
696 *arg = this_argv + pos_in_argv_i + 1;
697 else if (retval->takes_optional_argument())
698 *arg = retval->default_value;
702 usage(_("missing argument"), this_argv);
705 // If we're a -z option, we need to parse our argument as a
706 // long-option, e.g. "-z stacksize=8192".
707 if (retval == &dash_z)
710 const char* dash_z_arg = *arg;
711 retval = parse_long_option(1, arg, true, arg, &dummy_i);
713 usage(_("unknown -z option"), dash_z_arg);
719 } // End anonymous namespace.
724 General_options::General_options()
725 : printed_version_(false),
726 execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
727 do_demangle_(false), plugins_(),
728 incremental_disposition_(INCREMENTAL_CHECK), implicit_incremental_(false)
730 // Turn off option registration once construction is complete.
731 gold::options::ready_to_register = false;
734 General_options::Object_format
735 General_options::format_enum() const
737 return General_options::string_to_object_format(this->format());
740 General_options::Object_format
741 General_options::oformat_enum() const
743 return General_options::string_to_object_format(this->oformat());
746 // Add the sysroot, if any, to the search paths.
749 General_options::add_sysroot()
751 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
753 this->set_sysroot(get_default_sysroot());
754 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
758 char* canonical_sysroot = lrealpath(this->sysroot());
760 for (Dir_list::iterator p = this->library_path_.value.begin();
761 p != this->library_path_.value.end();
763 p->add_sysroot(this->sysroot(), canonical_sysroot);
765 free(canonical_sysroot);
768 // Return whether FILENAME is in a system directory.
771 General_options::is_in_system_directory(const std::string& filename) const
773 for (Dir_list::const_iterator p = this->library_path_.value.begin();
774 p != this->library_path_.value.end();
777 // We use a straight string comparison rather than calling
778 // FILENAME_CMP because we are only interested in the cases
779 // where we found the file in a system directory, which means
780 // that we used the directory name as a prefix for a -L search.
781 if (p->is_system_directory()
782 && filename.compare(0, p->name().size(), p->name()) == 0)
788 // Add a plugin to the list of plugins.
791 General_options::add_plugin(const char* filename)
793 if (this->plugins_ == NULL)
794 this->plugins_ = new Plugin_manager(*this);
795 this->plugins_->add_plugin(filename);
798 // Add a plugin option to a plugin.
801 General_options::add_plugin_option(const char* arg)
803 if (this->plugins_ == NULL)
804 gold_fatal("--plugin-opt requires --plugin.");
805 this->plugins_->add_plugin_option(arg);
808 // Set up variables and other state that isn't set up automatically by
809 // the parse routine, and ensure options don't contradict each other
810 // and are otherwise kosher.
813 General_options::finalize()
815 // Normalize the strip modifiers. They have a total order:
816 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
817 // If one is true, set all beneath it to true as well.
818 if (this->strip_all())
819 this->set_strip_debug(true);
820 if (this->strip_debug())
821 this->set_strip_debug_non_line(true);
822 if (this->strip_debug_non_line())
823 this->set_strip_debug_gdb(true);
825 if (this->Bshareable())
826 this->set_shared(true);
828 // If the user specifies both -s and -r, convert the -s to -S.
829 // -r requires us to keep externally visible symbols!
830 if (this->strip_all() && this->relocatable())
832 this->set_strip_all(false);
833 gold_assert(this->strip_debug());
836 // For us, -dc and -dp are synonyms for --define-common.
838 this->set_define_common(true);
840 this->set_define_common(true);
842 // We also set --define-common if we're not relocatable, as long as
843 // the user didn't explicitly ask for something different.
844 if (!this->user_set_define_common())
845 this->set_define_common(!this->relocatable());
847 // execstack_status_ is a three-state variable; update it based on
849 if (this->execstack())
850 this->set_execstack_status(EXECSTACK_YES);
851 else if (this->noexecstack())
852 this->set_execstack_status(EXECSTACK_NO);
854 // Handle the optional argument for --demangle.
855 if (this->user_set_demangle())
857 this->set_do_demangle(true);
858 const char* style = this->demangle();
861 enum demangling_styles style_code;
863 style_code = cplus_demangle_name_to_style(style);
864 if (style_code == unknown_demangling)
865 gold_fatal("unknown demangling style '%s'", style);
866 cplus_demangle_set_style(style_code);
869 else if (this->user_set_no_demangle())
870 this->set_do_demangle(false);
873 // Testing COLLECT_NO_DEMANGLE makes our default demangling
874 // behaviour identical to that of gcc's linker wrapper.
875 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
878 // -M is equivalent to "-Map -".
879 if (this->print_map() && !this->user_set_Map())
882 this->set_user_set_Map();
885 // Using -n or -N implies -static.
886 if (this->nmagic() || this->omagic())
887 this->set_static(true);
889 // If --thread_count is specified, it applies to
890 // --thread-count-{initial,middle,final}, though it doesn't override
892 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
893 this->set_thread_count_initial(this->thread_count());
894 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
895 this->set_thread_count_middle(this->thread_count());
896 if (this->thread_count() > 0 && this->thread_count_final() == 0)
897 this->set_thread_count_final(this->thread_count());
899 // Let's warn if you set the thread-count but we're going to ignore it.
900 #ifndef ENABLE_THREADS
903 gold_warning(_("ignoring --threads: "
904 "%s was compiled without thread support"),
906 this->set_threads(false);
908 if (this->thread_count() > 0 || this->thread_count_initial() > 0
909 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
910 gold_warning(_("ignoring --thread-count: "
911 "%s was compiled without thread support"),
915 if (this->user_set_Y())
917 std::string s = this->Y();
918 if (s.compare(0, 2, "P,") == 0)
925 next_pos = s.find(':', pos);
926 size_t len = (next_pos == std::string::npos
930 this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str());
933 while (next_pos != std::string::npos);
937 // Even if they don't specify it, we add -L /lib and -L /usr/lib.
938 // FIXME: We should only do this when configured in native mode.
939 this->add_to_library_path_with_sysroot("/lib");
940 this->add_to_library_path_with_sysroot("/usr/lib");
943 // Parse the contents of -retain-symbols-file into a set.
944 if (this->retain_symbols_file())
947 in.open(this->retain_symbols_file());
949 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
950 this->retain_symbols_file(), strerror(errno));
952 std::getline(in, line); // this chops off the trailing \n, if any
955 if (!line.empty() && line[line.length() - 1] == '\r') // Windows
956 line.resize(line.length() - 1);
957 this->symbols_to_retain_.insert(line);
958 std::getline(in, line);
962 if (this->shared() && !this->user_set_allow_shlib_undefined())
963 this->set_allow_shlib_undefined(true);
965 // Normalize library_path() by adding the sysroot to all directories
966 // in the path, as appropriate.
969 // Now that we've normalized the options, check for contradictory ones.
970 if (this->shared() && this->is_static())
971 gold_fatal(_("-shared and -static are incompatible"));
973 if (this->shared() && this->relocatable())
974 gold_fatal(_("-shared and -r are incompatible"));
976 // TODO: implement support for -retain-symbols-file with -r, if needed.
977 if (this->relocatable() && this->retain_symbols_file())
978 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
980 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
981 && (this->shared() || this->relocatable()))
982 gold_fatal(_("binary output format not compatible with -shared or -r"));
984 if (this->user_set_hash_bucket_empty_fraction()
985 && (this->hash_bucket_empty_fraction() < 0.0
986 || this->hash_bucket_empty_fraction() >= 1.0))
987 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
989 this->hash_bucket_empty_fraction());
991 if (this->implicit_incremental_ && !this->incremental())
992 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
993 "--incremental-unknown require the use of --incremental"));
995 // FIXME: we can/should be doing a lot more sanity checking here.
998 // Search_directory methods.
1000 // This is called if we have a sysroot. Apply the sysroot if
1001 // appropriate. Record whether the directory is in the sysroot.
1004 Search_directory::add_sysroot(const char* sysroot,
1005 const char* canonical_sysroot)
1007 gold_assert(*sysroot != '\0');
1008 if (this->put_in_sysroot_)
1010 if (!IS_DIR_SEPARATOR(this->name_[0])
1011 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
1012 this->name_ = '/' + this->name_;
1013 this->name_ = sysroot + this->name_;
1014 this->is_in_sysroot_ = true;
1018 // Check whether this entry is in the sysroot. To do this
1019 // correctly, we need to use canonical names. Otherwise we will
1020 // get confused by the ../../.. paths that gcc tends to use.
1021 char* canonical_name = lrealpath(this->name_.c_str());
1022 int canonical_name_len = strlen(canonical_name);
1023 int canonical_sysroot_len = strlen(canonical_sysroot);
1024 if (canonical_name_len > canonical_sysroot_len
1025 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
1027 canonical_name[canonical_sysroot_len] = '\0';
1028 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
1029 this->is_in_sysroot_ = true;
1031 free(canonical_name);
1035 // Input_arguments methods.
1037 // Add a file to the list.
1040 Input_arguments::add_file(const Input_file_argument& file)
1042 if (!this->in_group_)
1043 this->input_argument_list_.push_back(Input_argument(file));
1046 gold_assert(!this->input_argument_list_.empty());
1047 gold_assert(this->input_argument_list_.back().is_group());
1048 this->input_argument_list_.back().group()->add_file(file);
1055 Input_arguments::start_group()
1057 if (this->in_group_)
1058 gold_fatal(_("May not nest groups"));
1059 Input_file_group* group = new Input_file_group();
1060 this->input_argument_list_.push_back(Input_argument(group));
1061 this->in_group_ = true;
1067 Input_arguments::end_group()
1069 if (!this->in_group_)
1070 gold_fatal(_("Group end without group start"));
1071 this->in_group_ = false;
1074 // Command_line options.
1076 Command_line::Command_line()
1080 // Pre_options is the hook that sets the ready_to_register flag.
1082 Command_line::Pre_options::Pre_options()
1084 gold::options::ready_to_register = true;
1087 // Process the command line options. For process_one_option, i is the
1088 // index of argv to process next, and must be an option (that is,
1089 // start with a dash). The return value is the index of the next
1090 // option to process (i+1 or i+2, or argc to indicate processing is
1091 // done). no_more_options is set to true if (and when) "--" is seen
1095 Command_line::process_one_option(int argc, const char** argv, int i,
1096 bool* no_more_options)
1098 gold_assert(argv[i][0] == '-' && !(*no_more_options));
1100 // If we are reading "--", then just set no_more_options and return.
1101 if (argv[i][1] == '-' && argv[i][2] == '\0')
1103 *no_more_options = true;
1108 options::One_option* option = NULL;
1109 const char* arg = NULL;
1111 // First, try to process argv as a long option.
1112 option = parse_long_option(argc, argv, false, &arg, &new_i);
1115 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1119 // Now, try to process argv as a short option. Since several short
1120 // options can be combined in one argv, we may have to parse a lot
1121 // until we're done reading this argv.
1122 int pos_in_argv_i = 1;
1125 option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
1128 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1134 // I guess it's neither a long option nor a short option.
1135 usage(_("unknown option"), argv[i]);
1141 Command_line::process(int argc, const char** argv)
1143 bool no_more_options = false;
1147 this->position_options_.copy_from_options(this->options());
1148 if (no_more_options || argv[i][0] != '-')
1150 Input_file_argument file(argv[i], false, "", false,
1151 this->position_options_);
1152 this->inputs_.add_file(file);
1156 i = process_one_option(argc, argv, i, &no_more_options);
1159 if (this->inputs_.in_group())
1161 fprintf(stderr, _("%s: missing group end\n"), program_name);
1165 // Normalize the options and ensure they don't contradict each other.
1166 this->options_.finalize();
1169 } // End namespace gold.