1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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 construction 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 these 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 printf(_("%s: supported emulations:"), gold::program_name);
174 supported_names.clear();
175 gold::supported_emulation_names(&supported_names);
176 for (std::vector<const char*>::const_iterator p = supported_names.begin();
177 p != supported_names.end();
182 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
183 const char* report = REPORT_BUGS_TO;
185 printf(_("Report bugs to %s\n"), report);
188 // For bool, arg will be NULL (boolean options take no argument);
189 // we always just set to true.
191 parse_bool(const char*, const char*, bool* retval)
197 parse_uint(const char* option_name, const char* arg, int* retval)
200 *retval = strtol(arg, &endptr, 0);
201 if (*endptr != '\0' || retval < 0)
202 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
207 parse_int(const char* option_name, const char* arg, int* retval)
210 *retval = strtol(arg, &endptr, 0);
212 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
217 parse_uint64(const char* option_name, const char* arg, uint64_t* retval)
220 *retval = strtoull(arg, &endptr, 0);
222 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
227 parse_double(const char* option_name, const char* arg, double* retval)
230 *retval = strtod(arg, &endptr);
232 gold_fatal(_("%s: invalid option value "
233 "(expected a floating point number): %s"),
238 parse_percent(const char* option_name, const char* arg, double* retval)
241 *retval = strtod(arg, &endptr) / 100.0;
243 gold_fatal(_("%s: invalid option value "
244 "(expected a floating point number): %s"),
249 parse_string(const char* option_name, const char* arg, const char** retval)
252 gold_fatal(_("%s: must take a non-empty argument"), option_name);
257 parse_optional_string(const char*, const char* arg, const char** retval)
263 parse_dirlist(const char*, const char* arg, Dir_list* retval)
265 retval->push_back(Search_directory(arg, false));
269 parse_set(const char*, const char* arg, String_set* retval)
271 retval->insert(std::string(arg));
275 parse_choices(const char* option_name, const char* arg, const char** retval,
276 const char* choices[], int num_choices)
278 for (int i = 0; i < num_choices; i++)
279 if (strcmp(choices[i], arg) == 0)
285 // If we get here, the user did not enter a valid choice, so we die.
286 std::string choices_list;
287 for (int i = 0; i < num_choices; i++)
289 choices_list += choices[i];
290 if (i != num_choices - 1)
291 choices_list += ", ";
293 gold_fatal(_("%s: must take one of the following arguments: %s"),
294 option_name, choices_list.c_str());
297 } // End namespace options.
299 // Define the handler for "special" options (set via DEFINE_special).
302 General_options::parse_help(const char*, const char*, Command_line*)
305 ::exit(EXIT_SUCCESS);
309 General_options::parse_version(const char* opt, const char*, Command_line*)
311 bool print_short = (opt[0] == '-' && opt[1] == 'v');
312 gold::print_version(print_short);
313 this->printed_version_ = true;
315 ::exit(EXIT_SUCCESS);
319 General_options::parse_V(const char*, const char*, Command_line*)
321 gold::print_version(true);
322 this->printed_version_ = true;
324 printf(_(" Supported targets:\n"));
325 std::vector<const char*> supported_names;
326 gold::supported_target_names(&supported_names);
327 for (std::vector<const char*>::const_iterator p = supported_names.begin();
328 p != supported_names.end();
332 printf(_(" Supported emulations:\n"));
333 supported_names.clear();
334 gold::supported_emulation_names(&supported_names);
335 for (std::vector<const char*>::const_iterator p = supported_names.begin();
336 p != supported_names.end();
342 General_options::parse_defsym(const char*, const char* arg,
343 Command_line* cmdline)
345 cmdline->script_options().define_symbol(arg);
349 General_options::parse_incremental(const char*, const char*,
352 this->incremental_mode_ = INCREMENTAL_AUTO;
356 General_options::parse_no_incremental(const char*, const char*,
359 this->incremental_mode_ = INCREMENTAL_OFF;
363 General_options::parse_incremental_full(const char*, const char*,
366 this->incremental_mode_ = INCREMENTAL_FULL;
370 General_options::parse_incremental_update(const char*, const char*,
373 this->incremental_mode_ = INCREMENTAL_UPDATE;
377 General_options::parse_incremental_changed(const char*, const char*,
380 this->implicit_incremental_ = true;
381 this->incremental_disposition_ = INCREMENTAL_CHANGED;
385 General_options::parse_incremental_unchanged(const char*, const char*,
388 this->implicit_incremental_ = true;
389 this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
393 General_options::parse_incremental_unknown(const char*, const char*,
396 this->implicit_incremental_ = true;
397 this->incremental_disposition_ = INCREMENTAL_CHECK;
401 General_options::parse_library(const char*, const char* arg,
402 Command_line* cmdline)
404 Input_file_argument::Input_file_type type;
408 type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
413 type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
416 Input_file_argument file(name, type, "", false, *this);
417 cmdline->inputs().add_file(file);
420 #ifdef ENABLE_PLUGINS
422 General_options::parse_plugin(const char*, const char* arg,
425 this->add_plugin(arg);
428 // Parse --plugin-opt.
431 General_options::parse_plugin_opt(const char*, const char* arg,
434 this->add_plugin_option(arg);
436 #endif // ENABLE_PLUGINS
439 General_options::parse_R(const char* option, const char* arg,
440 Command_line* cmdline)
443 if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
444 this->add_to_rpath(arg);
446 this->parse_just_symbols(option, arg, cmdline);
450 General_options::parse_just_symbols(const char*, const char* arg,
451 Command_line* cmdline)
453 Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
455 cmdline->inputs().add_file(file);
458 // Handle --section-start.
461 General_options::parse_section_start(const char*, const char* arg,
464 const char* eq = strchr(arg, '=');
467 gold_error(_("invalid argument to --section-start; "
468 "must be SECTION=ADDRESS"));
472 std::string section_name(arg, eq - arg);
475 const char* val_start = eq;
476 if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
480 gold_error(_("--section-start address missing"));
485 for (; *eq != '\0'; ++eq)
489 gold_error(_("--section-start argument %s is not a valid hex number"),
494 addr += hex_value(*eq);
497 this->section_starts_[section_name] = addr;
500 // Look up a --section-start value.
503 General_options::section_start(const char* secname, uint64_t* paddr) const
505 if (this->section_starts_.empty())
507 std::map<std::string, uint64_t>::const_iterator p =
508 this->section_starts_.find(secname);
509 if (p == this->section_starts_.end())
516 General_options::parse_static(const char*, const char*, Command_line*)
518 this->set_static(true);
522 General_options::parse_script(const char*, const char* arg,
523 Command_line* cmdline)
525 if (!read_commandline_script(arg, cmdline))
526 gold::gold_fatal(_("unable to parse script file %s"), arg);
530 General_options::parse_version_script(const char*, const char* arg,
531 Command_line* cmdline)
533 if (!read_version_script(arg, cmdline))
534 gold::gold_fatal(_("unable to parse version script file %s"), arg);
538 General_options::parse_dynamic_list(const char*, const char* arg,
539 Command_line* cmdline)
541 if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
542 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
546 General_options::parse_start_group(const char*, const char*,
547 Command_line* cmdline)
549 cmdline->inputs().start_group();
553 General_options::parse_end_group(const char*, const char*,
554 Command_line* cmdline)
556 cmdline->inputs().end_group();
560 General_options::parse_start_lib(const char*, const char*,
561 Command_line* cmdline)
563 cmdline->inputs().start_lib(cmdline->position_dependent_options());
567 General_options::parse_end_lib(const char*, const char*,
568 Command_line* cmdline)
570 cmdline->inputs().end_lib();
573 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
574 // of names separated by commas or colons and puts them in a linked list.
575 // We implement the same parsing of names here but store names in an unordered
576 // map to speed up searching of names.
579 General_options::parse_exclude_libs(const char*, const char* arg,
586 size_t length = strcspn(p, ",:");
587 this->excluded_libs_.insert(std::string(p, length));
588 p += (p[length] ? length + 1 : length);
592 // The checking logic is based on the function check_excluded_libs() in
593 // ld/ldlang.c of GNU ld but our implementation is different because we use
594 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
595 // ld searches sequentially in the excluded libs list. For a given archive,
596 // a match is found if the archive's name matches exactly one of the list
597 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
598 // one of the list entry. An entry "ALL" in the list is considered as a
599 // wild-card and matches any given name.
602 General_options::check_excluded_libs(const std::string &name) const
604 Unordered_set<std::string>::const_iterator p;
606 // Exit early for the most common case.
607 if (excluded_libs_.empty())
610 // If we see "ALL", all archives are excluded from automatic export.
611 p = excluded_libs_.find(std::string("ALL"));
612 if (p != excluded_libs_.end())
615 // First strip off any directories in name.
616 const char* basename = lbasename(name.c_str());
618 // Try finding an exact match.
619 p = excluded_libs_.find(std::string(basename));
620 if (p != excluded_libs_.end())
623 // Try matching NAME without ".a" at the end.
624 size_t length = strlen(basename);
626 && (basename[length - 2] == '.')
627 && (basename[length - 1] == 'a'))
629 p = excluded_libs_.find(std::string(basename, length - 2));
630 if (p != excluded_libs_.end())
637 // Recognize input and output target names. The GNU linker accepts
638 // these with --format and --oformat. This code is intended to be
639 // minimally compatible. In practice for an ELF target this would be
640 // the same target as the input files; that name always start with
641 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
644 General_options::Object_format
645 General_options::string_to_object_format(const char* arg)
647 if (strncmp(arg, "elf", 3) == 0)
648 return gold::General_options::OBJECT_FORMAT_ELF;
649 else if (strcmp(arg, "binary") == 0)
650 return gold::General_options::OBJECT_FORMAT_BINARY;
653 gold::gold_error(_("format '%s' not supported; treating as elf "
654 "(supported formats: elf, binary)"),
656 return gold::General_options::OBJECT_FORMAT_ELF;
661 General_options::parse_fix_v4bx(const char*, const char*,
664 this->fix_v4bx_ = FIX_V4BX_REPLACE;
668 General_options::parse_fix_v4bx_interworking(const char*, const char*,
671 this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
675 General_options::parse_EB(const char*, const char*, Command_line*)
677 this->endianness_ = ENDIANNESS_BIG;
681 General_options::parse_EL(const char*, const char*, Command_line*)
683 this->endianness_ = ENDIANNESS_LITTLE;
686 } // End namespace gold.
695 _("%s: use the --help option for usage information\n"),
697 ::exit(EXIT_FAILURE);
701 usage(const char* msg, const char* opt)
705 gold::program_name, opt, msg);
709 // If the default sysroot is relocatable, try relocating it based on
713 get_relative_sysroot(const char* from)
715 char* path = make_relative_prefix(gold::program_name, from,
720 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
728 // Return the default sysroot. This is set by the --with-sysroot
729 // option to configure. Note we do not free the return value of
730 // get_relative_sysroot, which is a small memory leak, but is
731 // necessary since we store this pointer directly in General_options.
734 get_default_sysroot()
736 const char* sysroot = TARGET_SYSTEM_ROOT;
737 if (*sysroot == '\0')
740 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
742 char* path = get_relative_sysroot(BINDIR);
744 path = get_relative_sysroot(TOOLBINDIR);
752 // Parse a long option. Such options have the form
753 // <-|--><option>[=arg]. If "=arg" is not present but the option
754 // takes an argument, the next word is taken to the be the argument.
755 // If equals_only is set, then only the <option>=<arg> form is
756 // accepted, not the <option><space><arg> form. Returns a One_option
757 // struct or NULL if argv[i] cannot be parsed as a long option. In
758 // the not-NULL case, *arg is set to the option's argument (NULL if
759 // the option takes no argument), and *i is advanced past this option.
760 // NOTE: it is safe for argv and arg to point to the same place.
761 gold::options::One_option*
762 parse_long_option(int argc, const char** argv, bool equals_only,
763 const char** arg, int* i)
765 const char* const this_argv = argv[*i];
767 const char* equals = strchr(this_argv, '=');
768 const char* option_start = this_argv + strspn(this_argv, "-");
769 std::string option(option_start,
770 equals ? equals - option_start : strlen(option_start));
772 gold::options::Option_map::iterator it
773 = gold::options::long_options->find(option);
774 if (it == gold::options::long_options->end())
777 gold::options::One_option* retval = it->second;
779 // If the dash-count doesn't match, we fail.
780 if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
782 if (retval->dashes != gold::options::DASH_Z)
785 else if (this_argv[1] != '-') // one dash
787 if (retval->dashes != gold::options::ONE_DASH
788 && retval->dashes != gold::options::EXACTLY_ONE_DASH
789 && retval->dashes != gold::options::TWO_DASHES)
792 else // two dashes (or more!)
794 if (retval->dashes != gold::options::TWO_DASHES
795 && retval->dashes != gold::options::EXACTLY_TWO_DASHES
796 && retval->dashes != gold::options::ONE_DASH)
800 // Now that we know the option is good (or else bad in a way that
801 // will cause us to die), increment i to point past this argv.
804 // Figure out the option's argument, if any.
805 if (!retval->takes_argument())
808 usage(_("unexpected argument"), this_argv);
816 else if (retval->takes_optional_argument())
817 *arg = retval->default_value;
818 else if (*i < argc && !equals_only)
821 usage(_("missing argument"), this_argv);
827 // Parse a short option. Such options have the form -<option>[arg].
828 // If "arg" is not present but the option takes an argument, the next
829 // word is taken to the be the argument. If the option does not take
830 // an argument, it may be followed by another short option. Returns a
831 // One_option struct or NULL if argv[i] cannot be parsed as a short
832 // option. In the not-NULL case, *arg is set to the option's argument
833 // (NULL if the option takes no argument), and *i is advanced past
834 // this option. This function keeps *i the same if we parsed a short
835 // option that does not take an argument, that looks to be followed by
836 // another short option in the same word.
837 gold::options::One_option*
838 parse_short_option(int argc, const char** argv, int pos_in_argv_i,
839 const char** arg, int* i)
841 const char* const this_argv = argv[*i];
843 if (this_argv[0] != '-')
846 // We handle -z as a special case.
847 static gold::options::One_option dash_z("", gold::options::DASH_Z,
848 'z', "", NULL, "Z-OPTION", false,
850 gold::options::One_option* retval = NULL;
851 if (this_argv[pos_in_argv_i] == 'z')
855 const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
856 if (char_as_int > 0 && char_as_int < 128)
857 retval = gold::options::short_options[char_as_int];
863 // Figure out the option's argument, if any.
864 if (!retval->takes_argument())
867 // We only advance past this argument if it's the only one in argv.
868 if (this_argv[pos_in_argv_i + 1] == '\0')
873 // If we take an argument, we'll eat up this entire argv entry.
875 if (this_argv[pos_in_argv_i + 1] != '\0')
876 *arg = this_argv + pos_in_argv_i + 1;
877 else if (retval->takes_optional_argument())
878 *arg = retval->default_value;
882 usage(_("missing argument"), this_argv);
885 // If we're a -z option, we need to parse our argument as a
886 // long-option, e.g. "-z stacksize=8192".
887 if (retval == &dash_z)
890 const char* dash_z_arg = *arg;
891 retval = parse_long_option(1, arg, true, arg, &dummy_i);
893 usage(_("unknown -z option"), dash_z_arg);
899 } // End anonymous namespace.
904 General_options::General_options()
905 : printed_version_(false),
906 execstack_status_(EXECSTACK_FROM_INPUT),
907 icf_status_(ICF_NONE),
912 incremental_mode_(INCREMENTAL_OFF),
913 incremental_disposition_(INCREMENTAL_CHECK),
914 implicit_incremental_(false),
916 symbols_to_retain_(),
918 fix_v4bx_(FIX_V4BX_NONE),
919 endianness_(ENDIANNESS_NOT_SET)
921 // Turn off option registration once construction is complete.
922 gold::options::ready_to_register = false;
925 General_options::Object_format
926 General_options::format_enum() const
928 return General_options::string_to_object_format(this->format());
931 General_options::Object_format
932 General_options::oformat_enum() const
934 return General_options::string_to_object_format(this->oformat());
937 // Add the sysroot, if any, to the search paths.
940 General_options::add_sysroot()
942 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
944 this->set_sysroot(get_default_sysroot());
945 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
949 char* canonical_sysroot = lrealpath(this->sysroot());
951 for (Dir_list::iterator p = this->library_path_.value.begin();
952 p != this->library_path_.value.end();
954 p->add_sysroot(this->sysroot(), canonical_sysroot);
956 free(canonical_sysroot);
959 // Return whether FILENAME is in a system directory.
962 General_options::is_in_system_directory(const std::string& filename) const
964 for (Dir_list::const_iterator p = this->library_path_.value.begin();
965 p != this->library_path_.value.end();
968 // We use a straight string comparison rather than calling
969 // FILENAME_CMP because we are only interested in the cases
970 // where we found the file in a system directory, which means
971 // that we used the directory name as a prefix for a -L search.
972 if (p->is_system_directory()
973 && filename.compare(0, p->name().size(), p->name()) == 0)
979 // Add a plugin to the list of plugins.
982 General_options::add_plugin(const char* filename)
984 if (this->plugins_ == NULL)
985 this->plugins_ = new Plugin_manager(*this);
986 this->plugins_->add_plugin(filename);
989 // Add a plugin option to a plugin.
992 General_options::add_plugin_option(const char* arg)
994 if (this->plugins_ == NULL)
995 gold_fatal("--plugin-opt requires --plugin.");
996 this->plugins_->add_plugin_option(arg);
999 // Set up variables and other state that isn't set up automatically by
1000 // the parse routine, and ensure options don't contradict each other
1001 // and are otherwise kosher.
1004 General_options::finalize()
1006 // Normalize the strip modifiers. They have a total order:
1007 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
1008 // If one is true, set all beneath it to true as well.
1009 if (this->strip_all())
1010 this->set_strip_debug(true);
1011 if (this->strip_debug())
1012 this->set_strip_debug_non_line(true);
1013 if (this->strip_debug_non_line())
1014 this->set_strip_debug_gdb(true);
1016 if (this->Bshareable())
1017 this->set_shared(true);
1019 // If the user specifies both -s and -r, convert the -s to -S.
1020 // -r requires us to keep externally visible symbols!
1021 if (this->strip_all() && this->relocatable())
1023 this->set_strip_all(false);
1024 gold_assert(this->strip_debug());
1027 // For us, -dc and -dp are synonyms for --define-common.
1029 this->set_define_common(true);
1031 this->set_define_common(true);
1033 // We also set --define-common if we're not relocatable, as long as
1034 // the user didn't explicitly ask for something different.
1035 if (!this->user_set_define_common())
1036 this->set_define_common(!this->relocatable());
1038 // execstack_status_ is a three-state variable; update it based on
1039 // -z [no]execstack.
1040 if (this->execstack())
1041 this->set_execstack_status(EXECSTACK_YES);
1042 else if (this->noexecstack())
1043 this->set_execstack_status(EXECSTACK_NO);
1045 // icf_status_ is a three-state variable; update it based on the
1046 // value of this->icf().
1047 if (strcmp(this->icf(), "none") == 0)
1048 this->set_icf_status(ICF_NONE);
1049 else if (strcmp(this->icf(), "safe") == 0)
1050 this->set_icf_status(ICF_SAFE);
1052 this->set_icf_status(ICF_ALL);
1054 // Handle the optional argument for --demangle.
1055 if (this->user_set_demangle())
1057 this->set_do_demangle(true);
1058 const char* style = this->demangle();
1061 enum demangling_styles style_code;
1063 style_code = cplus_demangle_name_to_style(style);
1064 if (style_code == unknown_demangling)
1065 gold_fatal("unknown demangling style '%s'", style);
1066 cplus_demangle_set_style(style_code);
1069 else if (this->user_set_no_demangle())
1070 this->set_do_demangle(false);
1073 // Testing COLLECT_NO_DEMANGLE makes our default demangling
1074 // behaviour identical to that of gcc's linker wrapper.
1075 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
1078 // -M is equivalent to "-Map -".
1079 if (this->print_map() && !this->user_set_Map())
1082 this->set_user_set_Map();
1085 // Using -n or -N implies -static.
1086 if (this->nmagic() || this->omagic())
1087 this->set_static(true);
1089 // If --thread_count is specified, it applies to
1090 // --thread-count-{initial,middle,final}, though it doesn't override
1092 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
1093 this->set_thread_count_initial(this->thread_count());
1094 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
1095 this->set_thread_count_middle(this->thread_count());
1096 if (this->thread_count() > 0 && this->thread_count_final() == 0)
1097 this->set_thread_count_final(this->thread_count());
1099 // Let's warn if you set the thread-count but we're going to ignore it.
1100 #ifndef ENABLE_THREADS
1101 if (this->threads())
1103 gold_warning(_("ignoring --threads: "
1104 "%s was compiled without thread support"),
1106 this->set_threads(false);
1108 if (this->thread_count() > 0 || this->thread_count_initial() > 0
1109 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
1110 gold_warning(_("ignoring --thread-count: "
1111 "%s was compiled without thread support"),
1115 if (this->user_set_Y())
1117 std::string s = this->Y();
1118 if (s.compare(0, 2, "P,") == 0)
1125 next_pos = s.find(':', pos);
1126 size_t len = (next_pos == std::string::npos
1130 this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str());
1133 while (next_pos != std::string::npos);
1135 else if (!this->nostdlib())
1137 // Even if they don't specify it, we add -L /lib and -L /usr/lib.
1138 // FIXME: We should only do this when configured in native mode.
1139 this->add_to_library_path_with_sysroot("/lib");
1140 this->add_to_library_path_with_sysroot("/usr/lib");
1143 // Parse the contents of -retain-symbols-file into a set.
1144 if (this->retain_symbols_file())
1147 in.open(this->retain_symbols_file());
1149 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
1150 this->retain_symbols_file(), strerror(errno));
1152 std::getline(in, line); // this chops off the trailing \n, if any
1155 if (!line.empty() && line[line.length() - 1] == '\r') // Windows
1156 line.resize(line.length() - 1);
1157 this->symbols_to_retain_.insert(line);
1158 std::getline(in, line);
1162 if (this->shared() && !this->user_set_allow_shlib_undefined())
1163 this->set_allow_shlib_undefined(true);
1165 // Normalize library_path() by adding the sysroot to all directories
1166 // in the path, as appropriate.
1167 this->add_sysroot();
1169 // Now that we've normalized the options, check for contradictory ones.
1170 if (this->shared() && this->is_static())
1171 gold_fatal(_("-shared and -static are incompatible"));
1172 if (this->shared() && this->pie())
1173 gold_fatal(_("-shared and -pie are incompatible"));
1175 if (this->shared() && this->relocatable())
1176 gold_fatal(_("-shared and -r are incompatible"));
1177 if (this->pie() && this->relocatable())
1178 gold_fatal(_("-pie and -r are incompatible"));
1180 if (!this->shared())
1182 if (this->filter() != NULL)
1183 gold_fatal(_("-F/--filter may not used without -shared"));
1184 if (this->any_auxiliary())
1185 gold_fatal(_("-f/--auxiliary may not be used without -shared"));
1188 // TODO: implement support for -retain-symbols-file with -r, if needed.
1189 if (this->relocatable() && this->retain_symbols_file())
1190 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
1192 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
1195 || this->relocatable()))
1196 gold_fatal(_("binary output format not compatible "
1197 "with -shared or -pie or -r"));
1199 if (this->user_set_hash_bucket_empty_fraction()
1200 && (this->hash_bucket_empty_fraction() < 0.0
1201 || this->hash_bucket_empty_fraction() >= 1.0))
1202 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
1204 this->hash_bucket_empty_fraction());
1206 if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
1207 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
1208 "--incremental-unknown require the use of --incremental"));
1210 // FIXME: we can/should be doing a lot more sanity checking here.
1213 // Search_directory methods.
1215 // This is called if we have a sysroot. Apply the sysroot if
1216 // appropriate. Record whether the directory is in the sysroot.
1219 Search_directory::add_sysroot(const char* sysroot,
1220 const char* canonical_sysroot)
1222 gold_assert(*sysroot != '\0');
1223 if (this->put_in_sysroot_)
1225 if (!IS_DIR_SEPARATOR(this->name_[0])
1226 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
1227 this->name_ = '/' + this->name_;
1228 this->name_ = sysroot + this->name_;
1229 this->is_in_sysroot_ = true;
1233 // Check whether this entry is in the sysroot. To do this
1234 // correctly, we need to use canonical names. Otherwise we will
1235 // get confused by the ../../.. paths that gcc tends to use.
1236 char* canonical_name = lrealpath(this->name_.c_str());
1237 int canonical_name_len = strlen(canonical_name);
1238 int canonical_sysroot_len = strlen(canonical_sysroot);
1239 if (canonical_name_len > canonical_sysroot_len
1240 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
1242 canonical_name[canonical_sysroot_len] = '\0';
1243 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
1244 this->is_in_sysroot_ = true;
1246 free(canonical_name);
1250 // Input_arguments methods.
1252 // Add a file to the list.
1255 Input_arguments::add_file(Input_file_argument& file)
1257 file.set_arg_serial(++this->file_count_);
1258 if (this->in_group_)
1260 gold_assert(!this->input_argument_list_.empty());
1261 gold_assert(this->input_argument_list_.back().is_group());
1262 return this->input_argument_list_.back().group()->add_file(file);
1266 gold_assert(!this->input_argument_list_.empty());
1267 gold_assert(this->input_argument_list_.back().is_lib());
1268 return this->input_argument_list_.back().lib()->add_file(file);
1270 this->input_argument_list_.push_back(Input_argument(file));
1271 return this->input_argument_list_.back();
1277 Input_arguments::start_group()
1279 if (this->in_group_)
1280 gold_fatal(_("May not nest groups"));
1282 gold_fatal(_("may not nest groups in libraries"));
1283 Input_file_group* group = new Input_file_group();
1284 this->input_argument_list_.push_back(Input_argument(group));
1285 this->in_group_ = true;
1291 Input_arguments::end_group()
1293 if (!this->in_group_)
1294 gold_fatal(_("Group end without group start"));
1295 this->in_group_ = false;
1301 Input_arguments::start_lib(const Position_dependent_options& options)
1304 gold_fatal(_("may not nest libraries"));
1305 if (this->in_group_)
1306 gold_fatal(_("may not nest libraries in groups"));
1307 Input_file_lib* lib = new Input_file_lib(options);
1308 this->input_argument_list_.push_back(Input_argument(lib));
1309 this->in_lib_ = true;
1315 Input_arguments::end_lib()
1318 gold_fatal(_("lib end without lib start"));
1319 this->in_lib_ = false;
1322 // Command_line options.
1324 Command_line::Command_line()
1328 // Pre_options is the hook that sets the ready_to_register flag.
1330 Command_line::Pre_options::Pre_options()
1332 gold::options::ready_to_register = true;
1335 // Process the command line options. For process_one_option, i is the
1336 // index of argv to process next, and must be an option (that is,
1337 // start with a dash). The return value is the index of the next
1338 // option to process (i+1 or i+2, or argc to indicate processing is
1339 // done). no_more_options is set to true if (and when) "--" is seen
1343 Command_line::process_one_option(int argc, const char** argv, int i,
1344 bool* no_more_options)
1346 gold_assert(argv[i][0] == '-' && !(*no_more_options));
1348 // If we are reading "--", then just set no_more_options and return.
1349 if (argv[i][1] == '-' && argv[i][2] == '\0')
1351 *no_more_options = true;
1356 options::One_option* option = NULL;
1357 const char* arg = NULL;
1359 // First, try to process argv as a long option.
1360 option = parse_long_option(argc, argv, false, &arg, &new_i);
1363 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1367 // Now, try to process argv as a short option. Since several short
1368 // options can be combined in one argv, we may have to parse a lot
1369 // until we're done reading this argv.
1370 int pos_in_argv_i = 1;
1373 option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
1376 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1382 // I guess it's neither a long option nor a short option.
1383 usage(_("unknown option"), argv[i]);
1389 Command_line::process(int argc, const char** argv)
1391 bool no_more_options = false;
1395 this->position_options_.copy_from_options(this->options());
1396 if (no_more_options || argv[i][0] != '-')
1398 Input_file_argument file(argv[i],
1399 Input_file_argument::INPUT_FILE_TYPE_FILE,
1400 "", false, this->position_options_);
1401 this->inputs_.add_file(file);
1405 i = process_one_option(argc, argv, i, &no_more_options);
1408 if (this->inputs_.in_group())
1410 fprintf(stderr, _("%s: missing group end\n"), program_name);
1414 // Normalize the options and ensure they don't contradict each other.
1415 this->options_.finalize();
1418 // Finalize the version script options and return them.
1420 const Version_script_info&
1421 Command_line::version_script()
1423 this->options_.finalize_dynamic_list();
1424 Version_script_info* vsi = this->script_options_.version_script_info();
1429 } // End namespace gold.