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_string(const char* option_name, const char* arg, const char** retval)
241 gold_fatal(_("%s: must take a non-empty argument"), option_name);
246 parse_optional_string(const char*, const char* arg, const char** retval)
252 parse_dirlist(const char*, const char* arg, Dir_list* retval)
254 retval->push_back(Search_directory(arg, false));
258 parse_set(const char*, const char* arg, String_set* retval)
260 retval->insert(std::string(arg));
264 parse_choices(const char* option_name, const char* arg, const char** retval,
265 const char* choices[], int num_choices)
267 for (int i = 0; i < num_choices; i++)
268 if (strcmp(choices[i], arg) == 0)
274 // If we get here, the user did not enter a valid choice, so we die.
275 std::string choices_list;
276 for (int i = 0; i < num_choices; i++)
278 choices_list += choices[i];
279 if (i != num_choices - 1)
280 choices_list += ", ";
282 gold_fatal(_("%s: must take one of the following arguments: %s"),
283 option_name, choices_list.c_str());
286 } // End namespace options.
288 // Define the handler for "special" options (set via DEFINE_special).
291 General_options::parse_help(const char*, const char*, Command_line*)
294 ::exit(EXIT_SUCCESS);
298 General_options::parse_version(const char* opt, const char*, Command_line*)
300 bool print_short = (opt[0] == '-' && opt[1] == 'v');
301 gold::print_version(print_short);
302 this->printed_version_ = true;
304 ::exit(EXIT_SUCCESS);
308 General_options::parse_V(const char*, const char*, Command_line*)
310 gold::print_version(true);
311 this->printed_version_ = true;
313 printf(_(" Supported targets:\n"));
314 std::vector<const char*> supported_names;
315 gold::supported_target_names(&supported_names);
316 for (std::vector<const char*>::const_iterator p = supported_names.begin();
317 p != supported_names.end();
321 printf(_(" Supported emulations:\n"));
322 supported_names.clear();
323 gold::supported_emulation_names(&supported_names);
324 for (std::vector<const char*>::const_iterator p = supported_names.begin();
325 p != supported_names.end();
331 General_options::parse_defsym(const char*, const char* arg,
332 Command_line* cmdline)
334 cmdline->script_options().define_symbol(arg);
338 General_options::parse_incremental(const char*, const char*,
341 this->incremental_mode_ = INCREMENTAL_AUTO;
345 General_options::parse_no_incremental(const char*, const char*,
348 this->incremental_mode_ = INCREMENTAL_OFF;
352 General_options::parse_incremental_full(const char*, const char*,
355 this->incremental_mode_ = INCREMENTAL_FULL;
359 General_options::parse_incremental_update(const char*, const char*,
362 this->incremental_mode_ = INCREMENTAL_UPDATE;
366 General_options::parse_incremental_changed(const char*, const char*,
369 this->implicit_incremental_ = true;
370 this->incremental_disposition_ = INCREMENTAL_CHANGED;
374 General_options::parse_incremental_unchanged(const char*, const char*,
377 this->implicit_incremental_ = true;
378 this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
382 General_options::parse_incremental_unknown(const char*, const char*,
385 this->implicit_incremental_ = true;
386 this->incremental_disposition_ = INCREMENTAL_CHECK;
390 General_options::parse_library(const char*, const char* arg,
391 Command_line* cmdline)
393 Input_file_argument::Input_file_type type;
397 type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
402 type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
405 Input_file_argument file(name, type, "", false, *this);
406 cmdline->inputs().add_file(file);
409 #ifdef ENABLE_PLUGINS
411 General_options::parse_plugin(const char*, const char* arg,
414 this->add_plugin(arg);
417 // Parse --plugin-opt.
420 General_options::parse_plugin_opt(const char*, const char* arg,
423 this->add_plugin_option(arg);
425 #endif // ENABLE_PLUGINS
428 General_options::parse_R(const char* option, const char* arg,
429 Command_line* cmdline)
432 if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
433 this->add_to_rpath(arg);
435 this->parse_just_symbols(option, arg, cmdline);
439 General_options::parse_just_symbols(const char*, const char* arg,
440 Command_line* cmdline)
442 Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
444 cmdline->inputs().add_file(file);
447 // Handle --section-start.
450 General_options::parse_section_start(const char*, const char* arg,
453 const char* eq = strchr(arg, '=');
456 gold_error(_("invalid argument to --section-start; "
457 "must be SECTION=ADDRESS"));
461 std::string section_name(arg, eq - arg);
464 const char* val_start = eq;
465 if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
469 gold_error(_("--section-start address missing"));
474 for (; *eq != '\0'; ++eq)
478 gold_error(_("--section-start argument %s is not a valid hex number"),
483 addr += hex_value(*eq);
486 this->section_starts_[section_name] = addr;
489 // Look up a --section-start value.
492 General_options::section_start(const char* secname, uint64_t* paddr) const
494 if (this->section_starts_.empty())
496 std::map<std::string, uint64_t>::const_iterator p =
497 this->section_starts_.find(secname);
498 if (p == this->section_starts_.end())
505 General_options::parse_static(const char*, const char*, Command_line*)
507 this->set_static(true);
511 General_options::parse_script(const char*, const char* arg,
512 Command_line* cmdline)
514 if (!read_commandline_script(arg, cmdline))
515 gold::gold_fatal(_("unable to parse script file %s"), arg);
519 General_options::parse_version_script(const char*, const char* arg,
520 Command_line* cmdline)
522 if (!read_version_script(arg, cmdline))
523 gold::gold_fatal(_("unable to parse version script file %s"), arg);
527 General_options::parse_dynamic_list(const char*, const char* arg,
528 Command_line* cmdline)
530 if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
531 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
535 General_options::parse_start_group(const char*, const char*,
536 Command_line* cmdline)
538 cmdline->inputs().start_group();
542 General_options::parse_end_group(const char*, const char*,
543 Command_line* cmdline)
545 cmdline->inputs().end_group();
549 General_options::parse_start_lib(const char*, const char*,
550 Command_line* cmdline)
552 cmdline->inputs().start_lib(cmdline->position_dependent_options());
556 General_options::parse_end_lib(const char*, const char*,
557 Command_line* cmdline)
559 cmdline->inputs().end_lib();
562 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
563 // of names separated by commas or colons and puts them in a linked list.
564 // We implement the same parsing of names here but store names in an unordered
565 // map to speed up searching of names.
568 General_options::parse_exclude_libs(const char*, const char* arg,
575 size_t length = strcspn(p, ",:");
576 this->excluded_libs_.insert(std::string(p, length));
577 p += (p[length] ? length + 1 : length);
581 // The checking logic is based on the function check_excluded_libs() in
582 // ld/ldlang.c of GNU ld but our implementation is different because we use
583 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
584 // ld searches sequentially in the excluded libs list. For a given archive,
585 // a match is found if the archive's name matches exactly one of the list
586 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
587 // one of the list entry. An entry "ALL" in the list is considered as a
588 // wild-card and matches any given name.
591 General_options::check_excluded_libs(const std::string &name) const
593 Unordered_set<std::string>::const_iterator p;
595 // Exit early for the most common case.
596 if (excluded_libs_.empty())
599 // If we see "ALL", all archives are excluded from automatic export.
600 p = excluded_libs_.find(std::string("ALL"));
601 if (p != excluded_libs_.end())
604 // First strip off any directories in name.
605 const char* basename = lbasename(name.c_str());
607 // Try finding an exact match.
608 p = excluded_libs_.find(std::string(basename));
609 if (p != excluded_libs_.end())
612 // Try matching NAME without ".a" at the end.
613 size_t length = strlen(basename);
615 && (basename[length - 2] == '.')
616 && (basename[length - 1] == 'a'))
618 p = excluded_libs_.find(std::string(basename, length - 2));
619 if (p != excluded_libs_.end())
626 // Recognize input and output target names. The GNU linker accepts
627 // these with --format and --oformat. This code is intended to be
628 // minimally compatible. In practice for an ELF target this would be
629 // the same target as the input files; that name always start with
630 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
633 General_options::Object_format
634 General_options::string_to_object_format(const char* arg)
636 if (strncmp(arg, "elf", 3) == 0)
637 return gold::General_options::OBJECT_FORMAT_ELF;
638 else if (strcmp(arg, "binary") == 0)
639 return gold::General_options::OBJECT_FORMAT_BINARY;
642 gold::gold_error(_("format '%s' not supported; treating as elf "
643 "(supported formats: elf, binary)"),
645 return gold::General_options::OBJECT_FORMAT_ELF;
650 General_options::parse_fix_v4bx(const char*, const char*,
653 this->fix_v4bx_ = FIX_V4BX_REPLACE;
657 General_options::parse_fix_v4bx_interworking(const char*, const char*,
660 this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
664 General_options::parse_EB(const char*, const char*, Command_line*)
666 this->endianness_ = ENDIANNESS_BIG;
670 General_options::parse_EL(const char*, const char*, Command_line*)
672 this->endianness_ = ENDIANNESS_LITTLE;
675 } // End namespace gold.
684 _("%s: use the --help option for usage information\n"),
686 ::exit(EXIT_FAILURE);
690 usage(const char* msg, const char* opt)
694 gold::program_name, opt, msg);
698 // If the default sysroot is relocatable, try relocating it based on
702 get_relative_sysroot(const char* from)
704 char* path = make_relative_prefix(gold::program_name, from,
709 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
717 // Return the default sysroot. This is set by the --with-sysroot
718 // option to configure. Note we do not free the return value of
719 // get_relative_sysroot, which is a small memory leak, but is
720 // necessary since we store this pointer directly in General_options.
723 get_default_sysroot()
725 const char* sysroot = TARGET_SYSTEM_ROOT;
726 if (*sysroot == '\0')
729 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
731 char* path = get_relative_sysroot(BINDIR);
733 path = get_relative_sysroot(TOOLBINDIR);
741 // Parse a long option. Such options have the form
742 // <-|--><option>[=arg]. If "=arg" is not present but the option
743 // takes an argument, the next word is taken to the be the argument.
744 // If equals_only is set, then only the <option>=<arg> form is
745 // accepted, not the <option><space><arg> form. Returns a One_option
746 // struct or NULL if argv[i] cannot be parsed as a long option. In
747 // the not-NULL case, *arg is set to the option's argument (NULL if
748 // the option takes no argument), and *i is advanced past this option.
749 // NOTE: it is safe for argv and arg to point to the same place.
750 gold::options::One_option*
751 parse_long_option(int argc, const char** argv, bool equals_only,
752 const char** arg, int* i)
754 const char* const this_argv = argv[*i];
756 const char* equals = strchr(this_argv, '=');
757 const char* option_start = this_argv + strspn(this_argv, "-");
758 std::string option(option_start,
759 equals ? equals - option_start : strlen(option_start));
761 gold::options::Option_map::iterator it
762 = gold::options::long_options->find(option);
763 if (it == gold::options::long_options->end())
766 gold::options::One_option* retval = it->second;
768 // If the dash-count doesn't match, we fail.
769 if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
771 if (retval->dashes != gold::options::DASH_Z)
774 else if (this_argv[1] != '-') // one dash
776 if (retval->dashes != gold::options::ONE_DASH
777 && retval->dashes != gold::options::EXACTLY_ONE_DASH
778 && retval->dashes != gold::options::TWO_DASHES)
781 else // two dashes (or more!)
783 if (retval->dashes != gold::options::TWO_DASHES
784 && retval->dashes != gold::options::EXACTLY_TWO_DASHES
785 && retval->dashes != gold::options::ONE_DASH)
789 // Now that we know the option is good (or else bad in a way that
790 // will cause us to die), increment i to point past this argv.
793 // Figure out the option's argument, if any.
794 if (!retval->takes_argument())
797 usage(_("unexpected argument"), this_argv);
805 else if (retval->takes_optional_argument())
806 *arg = retval->default_value;
807 else if (*i < argc && !equals_only)
810 usage(_("missing argument"), this_argv);
816 // Parse a short option. Such options have the form -<option>[arg].
817 // If "arg" is not present but the option takes an argument, the next
818 // word is taken to the be the argument. If the option does not take
819 // an argument, it may be followed by another short option. Returns a
820 // One_option struct or NULL if argv[i] cannot be parsed as a short
821 // option. In the not-NULL case, *arg is set to the option's argument
822 // (NULL if the option takes no argument), and *i is advanced past
823 // this option. This function keeps *i the same if we parsed a short
824 // option that does not take an argument, that looks to be followed by
825 // another short option in the same word.
826 gold::options::One_option*
827 parse_short_option(int argc, const char** argv, int pos_in_argv_i,
828 const char** arg, int* i)
830 const char* const this_argv = argv[*i];
832 if (this_argv[0] != '-')
835 // We handle -z as a special case.
836 static gold::options::One_option dash_z("", gold::options::DASH_Z,
837 'z', "", NULL, "Z-OPTION", false,
839 gold::options::One_option* retval = NULL;
840 if (this_argv[pos_in_argv_i] == 'z')
844 const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
845 if (char_as_int > 0 && char_as_int < 128)
846 retval = gold::options::short_options[char_as_int];
852 // Figure out the option's argument, if any.
853 if (!retval->takes_argument())
856 // We only advance past this argument if it's the only one in argv.
857 if (this_argv[pos_in_argv_i + 1] == '\0')
862 // If we take an argument, we'll eat up this entire argv entry.
864 if (this_argv[pos_in_argv_i + 1] != '\0')
865 *arg = this_argv + pos_in_argv_i + 1;
866 else if (retval->takes_optional_argument())
867 *arg = retval->default_value;
871 usage(_("missing argument"), this_argv);
874 // If we're a -z option, we need to parse our argument as a
875 // long-option, e.g. "-z stacksize=8192".
876 if (retval == &dash_z)
879 const char* dash_z_arg = *arg;
880 retval = parse_long_option(1, arg, true, arg, &dummy_i);
882 usage(_("unknown -z option"), dash_z_arg);
888 } // End anonymous namespace.
893 General_options::General_options()
894 : printed_version_(false),
895 execstack_status_(EXECSTACK_FROM_INPUT),
896 icf_status_(ICF_NONE),
901 incremental_mode_(INCREMENTAL_OFF),
902 incremental_disposition_(INCREMENTAL_CHECK),
903 implicit_incremental_(false),
905 symbols_to_retain_(),
907 fix_v4bx_(FIX_V4BX_NONE),
908 endianness_(ENDIANNESS_NOT_SET)
910 // Turn off option registration once construction is complete.
911 gold::options::ready_to_register = false;
914 General_options::Object_format
915 General_options::format_enum() const
917 return General_options::string_to_object_format(this->format());
920 General_options::Object_format
921 General_options::oformat_enum() const
923 return General_options::string_to_object_format(this->oformat());
926 // Add the sysroot, if any, to the search paths.
929 General_options::add_sysroot()
931 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
933 this->set_sysroot(get_default_sysroot());
934 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
938 char* canonical_sysroot = lrealpath(this->sysroot());
940 for (Dir_list::iterator p = this->library_path_.value.begin();
941 p != this->library_path_.value.end();
943 p->add_sysroot(this->sysroot(), canonical_sysroot);
945 free(canonical_sysroot);
948 // Return whether FILENAME is in a system directory.
951 General_options::is_in_system_directory(const std::string& filename) const
953 for (Dir_list::const_iterator p = this->library_path_.value.begin();
954 p != this->library_path_.value.end();
957 // We use a straight string comparison rather than calling
958 // FILENAME_CMP because we are only interested in the cases
959 // where we found the file in a system directory, which means
960 // that we used the directory name as a prefix for a -L search.
961 if (p->is_system_directory()
962 && filename.compare(0, p->name().size(), p->name()) == 0)
968 // Add a plugin to the list of plugins.
971 General_options::add_plugin(const char* filename)
973 if (this->plugins_ == NULL)
974 this->plugins_ = new Plugin_manager(*this);
975 this->plugins_->add_plugin(filename);
978 // Add a plugin option to a plugin.
981 General_options::add_plugin_option(const char* arg)
983 if (this->plugins_ == NULL)
984 gold_fatal("--plugin-opt requires --plugin.");
985 this->plugins_->add_plugin_option(arg);
988 // Set up variables and other state that isn't set up automatically by
989 // the parse routine, and ensure options don't contradict each other
990 // and are otherwise kosher.
993 General_options::finalize()
995 // Normalize the strip modifiers. They have a total order:
996 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
997 // If one is true, set all beneath it to true as well.
998 if (this->strip_all())
999 this->set_strip_debug(true);
1000 if (this->strip_debug())
1001 this->set_strip_debug_non_line(true);
1002 if (this->strip_debug_non_line())
1003 this->set_strip_debug_gdb(true);
1005 if (this->Bshareable())
1006 this->set_shared(true);
1008 // If the user specifies both -s and -r, convert the -s to -S.
1009 // -r requires us to keep externally visible symbols!
1010 if (this->strip_all() && this->relocatable())
1012 this->set_strip_all(false);
1013 gold_assert(this->strip_debug());
1016 // For us, -dc and -dp are synonyms for --define-common.
1018 this->set_define_common(true);
1020 this->set_define_common(true);
1022 // We also set --define-common if we're not relocatable, as long as
1023 // the user didn't explicitly ask for something different.
1024 if (!this->user_set_define_common())
1025 this->set_define_common(!this->relocatable());
1027 // execstack_status_ is a three-state variable; update it based on
1028 // -z [no]execstack.
1029 if (this->execstack())
1030 this->set_execstack_status(EXECSTACK_YES);
1031 else if (this->noexecstack())
1032 this->set_execstack_status(EXECSTACK_NO);
1034 // icf_status_ is a three-state variable; update it based on the
1035 // value of this->icf().
1036 if (strcmp(this->icf(), "none") == 0)
1037 this->set_icf_status(ICF_NONE);
1038 else if (strcmp(this->icf(), "safe") == 0)
1039 this->set_icf_status(ICF_SAFE);
1041 this->set_icf_status(ICF_ALL);
1043 // Handle the optional argument for --demangle.
1044 if (this->user_set_demangle())
1046 this->set_do_demangle(true);
1047 const char* style = this->demangle();
1050 enum demangling_styles style_code;
1052 style_code = cplus_demangle_name_to_style(style);
1053 if (style_code == unknown_demangling)
1054 gold_fatal("unknown demangling style '%s'", style);
1055 cplus_demangle_set_style(style_code);
1058 else if (this->user_set_no_demangle())
1059 this->set_do_demangle(false);
1062 // Testing COLLECT_NO_DEMANGLE makes our default demangling
1063 // behaviour identical to that of gcc's linker wrapper.
1064 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
1067 // -M is equivalent to "-Map -".
1068 if (this->print_map() && !this->user_set_Map())
1071 this->set_user_set_Map();
1074 // Using -n or -N implies -static.
1075 if (this->nmagic() || this->omagic())
1076 this->set_static(true);
1078 // If --thread_count is specified, it applies to
1079 // --thread-count-{initial,middle,final}, though it doesn't override
1081 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
1082 this->set_thread_count_initial(this->thread_count());
1083 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
1084 this->set_thread_count_middle(this->thread_count());
1085 if (this->thread_count() > 0 && this->thread_count_final() == 0)
1086 this->set_thread_count_final(this->thread_count());
1088 // Let's warn if you set the thread-count but we're going to ignore it.
1089 #ifndef ENABLE_THREADS
1090 if (this->threads())
1092 gold_warning(_("ignoring --threads: "
1093 "%s was compiled without thread support"),
1095 this->set_threads(false);
1097 if (this->thread_count() > 0 || this->thread_count_initial() > 0
1098 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
1099 gold_warning(_("ignoring --thread-count: "
1100 "%s was compiled without thread support"),
1104 if (this->user_set_Y())
1106 std::string s = this->Y();
1107 if (s.compare(0, 2, "P,") == 0)
1114 next_pos = s.find(':', pos);
1115 size_t len = (next_pos == std::string::npos
1119 this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str());
1122 while (next_pos != std::string::npos);
1124 else if (!this->nostdlib())
1126 // Even if they don't specify it, we add -L /lib and -L /usr/lib.
1127 // FIXME: We should only do this when configured in native mode.
1128 this->add_to_library_path_with_sysroot("/lib");
1129 this->add_to_library_path_with_sysroot("/usr/lib");
1132 // Parse the contents of -retain-symbols-file into a set.
1133 if (this->retain_symbols_file())
1136 in.open(this->retain_symbols_file());
1138 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
1139 this->retain_symbols_file(), strerror(errno));
1141 std::getline(in, line); // this chops off the trailing \n, if any
1144 if (!line.empty() && line[line.length() - 1] == '\r') // Windows
1145 line.resize(line.length() - 1);
1146 this->symbols_to_retain_.insert(line);
1147 std::getline(in, line);
1151 if (this->shared() && !this->user_set_allow_shlib_undefined())
1152 this->set_allow_shlib_undefined(true);
1154 // Normalize library_path() by adding the sysroot to all directories
1155 // in the path, as appropriate.
1156 this->add_sysroot();
1158 // Now that we've normalized the options, check for contradictory ones.
1159 if (this->shared() && this->is_static())
1160 gold_fatal(_("-shared and -static are incompatible"));
1161 if (this->shared() && this->pie())
1162 gold_fatal(_("-shared and -pie are incompatible"));
1164 if (this->shared() && this->relocatable())
1165 gold_fatal(_("-shared and -r are incompatible"));
1166 if (this->pie() && this->relocatable())
1167 gold_fatal(_("-pie and -r are incompatible"));
1169 if (!this->shared())
1171 if (this->filter() != NULL)
1172 gold_fatal(_("-F/--filter may not used without -shared"));
1173 if (this->any_auxiliary())
1174 gold_fatal(_("-f/--auxiliary may not be used without -shared"));
1177 // TODO: implement support for -retain-symbols-file with -r, if needed.
1178 if (this->relocatable() && this->retain_symbols_file())
1179 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
1181 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
1184 || this->relocatable()))
1185 gold_fatal(_("binary output format not compatible "
1186 "with -shared or -pie or -r"));
1188 if (this->user_set_hash_bucket_empty_fraction()
1189 && (this->hash_bucket_empty_fraction() < 0.0
1190 || this->hash_bucket_empty_fraction() >= 1.0))
1191 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
1193 this->hash_bucket_empty_fraction());
1195 if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
1196 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
1197 "--incremental-unknown require the use of --incremental"));
1199 // FIXME: we can/should be doing a lot more sanity checking here.
1202 // Search_directory methods.
1204 // This is called if we have a sysroot. Apply the sysroot if
1205 // appropriate. Record whether the directory is in the sysroot.
1208 Search_directory::add_sysroot(const char* sysroot,
1209 const char* canonical_sysroot)
1211 gold_assert(*sysroot != '\0');
1212 if (this->put_in_sysroot_)
1214 if (!IS_DIR_SEPARATOR(this->name_[0])
1215 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
1216 this->name_ = '/' + this->name_;
1217 this->name_ = sysroot + this->name_;
1218 this->is_in_sysroot_ = true;
1222 // Check whether this entry is in the sysroot. To do this
1223 // correctly, we need to use canonical names. Otherwise we will
1224 // get confused by the ../../.. paths that gcc tends to use.
1225 char* canonical_name = lrealpath(this->name_.c_str());
1226 int canonical_name_len = strlen(canonical_name);
1227 int canonical_sysroot_len = strlen(canonical_sysroot);
1228 if (canonical_name_len > canonical_sysroot_len
1229 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
1231 canonical_name[canonical_sysroot_len] = '\0';
1232 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
1233 this->is_in_sysroot_ = true;
1235 free(canonical_name);
1239 // Input_arguments methods.
1241 // Add a file to the list.
1244 Input_arguments::add_file(Input_file_argument& file)
1246 file.set_arg_serial(++this->file_count_);
1247 if (this->in_group_)
1249 gold_assert(!this->input_argument_list_.empty());
1250 gold_assert(this->input_argument_list_.back().is_group());
1251 return this->input_argument_list_.back().group()->add_file(file);
1255 gold_assert(!this->input_argument_list_.empty());
1256 gold_assert(this->input_argument_list_.back().is_lib());
1257 return this->input_argument_list_.back().lib()->add_file(file);
1259 this->input_argument_list_.push_back(Input_argument(file));
1260 return this->input_argument_list_.back();
1266 Input_arguments::start_group()
1268 if (this->in_group_)
1269 gold_fatal(_("May not nest groups"));
1271 gold_fatal(_("may not nest groups in libraries"));
1272 Input_file_group* group = new Input_file_group();
1273 this->input_argument_list_.push_back(Input_argument(group));
1274 this->in_group_ = true;
1280 Input_arguments::end_group()
1282 if (!this->in_group_)
1283 gold_fatal(_("Group end without group start"));
1284 this->in_group_ = false;
1290 Input_arguments::start_lib(const Position_dependent_options& options)
1293 gold_fatal(_("may not nest libraries"));
1294 if (this->in_group_)
1295 gold_fatal(_("may not nest libraries in groups"));
1296 Input_file_lib* lib = new Input_file_lib(options);
1297 this->input_argument_list_.push_back(Input_argument(lib));
1298 this->in_lib_ = true;
1304 Input_arguments::end_lib()
1307 gold_fatal(_("lib end without lib start"));
1308 this->in_lib_ = false;
1311 // Command_line options.
1313 Command_line::Command_line()
1317 // Pre_options is the hook that sets the ready_to_register flag.
1319 Command_line::Pre_options::Pre_options()
1321 gold::options::ready_to_register = true;
1324 // Process the command line options. For process_one_option, i is the
1325 // index of argv to process next, and must be an option (that is,
1326 // start with a dash). The return value is the index of the next
1327 // option to process (i+1 or i+2, or argc to indicate processing is
1328 // done). no_more_options is set to true if (and when) "--" is seen
1332 Command_line::process_one_option(int argc, const char** argv, int i,
1333 bool* no_more_options)
1335 gold_assert(argv[i][0] == '-' && !(*no_more_options));
1337 // If we are reading "--", then just set no_more_options and return.
1338 if (argv[i][1] == '-' && argv[i][2] == '\0')
1340 *no_more_options = true;
1345 options::One_option* option = NULL;
1346 const char* arg = NULL;
1348 // First, try to process argv as a long option.
1349 option = parse_long_option(argc, argv, false, &arg, &new_i);
1352 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1356 // Now, try to process argv as a short option. Since several short
1357 // options can be combined in one argv, we may have to parse a lot
1358 // until we're done reading this argv.
1359 int pos_in_argv_i = 1;
1362 option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
1365 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1371 // I guess it's neither a long option nor a short option.
1372 usage(_("unknown option"), argv[i]);
1378 Command_line::process(int argc, const char** argv)
1380 bool no_more_options = false;
1384 this->position_options_.copy_from_options(this->options());
1385 if (no_more_options || argv[i][0] != '-')
1387 Input_file_argument file(argv[i],
1388 Input_file_argument::INPUT_FILE_TYPE_FILE,
1389 "", false, this->position_options_);
1390 this->inputs_.add_file(file);
1394 i = process_one_option(argc, argv, i, &no_more_options);
1397 if (this->inputs_.in_group())
1399 fprintf(stderr, _("%s: missing group end\n"), program_name);
1403 // Normalize the options and ensure they don't contradict each other.
1404 this->options_.finalize();
1407 // Finalize the version script options and return them.
1409 const Version_script_info&
1410 Command_line::version_script()
1412 this->options_.finalize_dynamic_list();
1413 Version_script_info* vsi = this->script_options_.version_script_info();
1418 } // End namespace gold.