1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013
4 // Free Software Foundation, Inc.
5 // Written by Ian Lance Taylor <iant@google.com>.
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
33 #include "filenames.h"
34 #include "libiberty.h"
36 #include "../bfd/bfdver.h"
40 #include "target-select.h"
48 Position_dependent_options::default_options_;
53 // This flag is TRUE if we should register the command-line options as they
54 // are constructed. It is set after construction of the options within
55 // class Position_dependent_options.
56 static bool ready_to_register = false;
58 // This global variable is set up as General_options is constructed.
59 static std::vector<const One_option*> registered_options;
61 // These are set up at the same time -- the variables that accept one
62 // dash, two, or require -z. A single variable may be in more than
63 // one of these data structures.
64 typedef Unordered_map<std::string, One_option*> Option_map;
65 static Option_map* long_options = NULL;
66 static One_option* short_options[128];
69 One_option::register_option()
71 if (!ready_to_register)
74 registered_options.push_back(this);
76 // We can't make long_options a static Option_map because we can't
77 // guarantee that will be initialized before register_option() is
79 if (long_options == NULL)
80 long_options = new Option_map;
82 // TWO_DASHES means that two dashes are preferred, but one is ok too.
83 if (!this->longname.empty())
84 (*long_options)[this->longname] = this;
86 const int shortname_as_int = static_cast<int>(this->shortname);
87 gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
88 if (this->shortname != '\0')
90 gold_assert(short_options[shortname_as_int] == NULL);
91 short_options[shortname_as_int] = this;
96 One_option::print() const
101 if (this->shortname != '\0')
103 len += printf("-%c", this->shortname);
106 // -z takes long-names only.
107 gold_assert(this->dashes != DASH_Z);
108 len += printf(" %s", gettext(this->helparg));
112 if (!this->longname.empty()
113 && !(this->longname[0] == this->shortname
114 && this->longname[1] == '\0'))
118 switch (this->dashes)
120 case options::ONE_DASH: case options::EXACTLY_ONE_DASH:
123 case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES:
126 case options::DASH_Z:
127 len += printf("-z ");
132 len += printf("%s", this->longname.c_str());
135 // For most options, we print "--frob FOO". But for -z
136 // we print "-z frob=FOO".
137 len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ',
138 gettext(this->helparg));
147 for (; len < 30; ++len)
150 // TODO: if we're boolean, add " (default)" when appropriate.
151 printf("%s\n", gettext(this->helpstring));
157 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
159 std::vector<const One_option*>::const_iterator it;
160 for (it = registered_options.begin(); it != registered_options.end(); ++it)
163 // config.guess and libtool.m4 look in ld --help output for the
164 // string "supported targets".
165 printf(_("%s: supported targets:"), gold::program_name);
166 std::vector<const char*> supported_names;
167 gold::supported_target_names(&supported_names);
168 for (std::vector<const char*>::const_iterator p = supported_names.begin();
169 p != supported_names.end();
174 printf(_("%s: supported emulations:"), gold::program_name);
175 supported_names.clear();
176 gold::supported_emulation_names(&supported_names);
177 for (std::vector<const char*>::const_iterator p = supported_names.begin();
178 p != supported_names.end();
183 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
184 const char* report = REPORT_BUGS_TO;
186 printf(_("Report bugs to %s\n"), report);
189 // For bool, arg will be NULL (boolean options take no argument);
190 // we always just set to true.
192 parse_bool(const char*, const char*, bool* retval)
198 parse_uint(const char* option_name, const char* arg, int* retval)
201 *retval = strtol(arg, &endptr, 0);
202 if (*endptr != '\0' || *retval < 0)
203 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
208 parse_int(const char* option_name, const char* arg, int* retval)
211 *retval = strtol(arg, &endptr, 0);
213 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
218 parse_uint64(const char* option_name, const char* arg, uint64_t* retval)
221 *retval = strtoull(arg, &endptr, 0);
223 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
228 parse_double(const char* option_name, const char* arg, double* retval)
231 *retval = strtod(arg, &endptr);
233 gold_fatal(_("%s: invalid option value "
234 "(expected a floating point number): %s"),
239 parse_percent(const char* option_name, const char* arg, double* retval)
242 *retval = strtod(arg, &endptr) / 100.0;
244 gold_fatal(_("%s: invalid option value "
245 "(expected a floating point number): %s"),
250 parse_string(const char* option_name, const char* arg, const char** retval)
253 gold_fatal(_("%s: must take a non-empty argument"), option_name);
258 parse_optional_string(const char*, const char* arg, const char** retval)
264 parse_dirlist(const char*, const char* arg, Dir_list* retval)
266 retval->push_back(Search_directory(arg, false));
270 parse_set(const char*, const char* arg, String_set* retval)
272 retval->insert(std::string(arg));
276 parse_choices(const char* option_name, const char* arg, const char** retval,
277 const char* choices[], int num_choices)
279 for (int i = 0; i < num_choices; i++)
280 if (strcmp(choices[i], arg) == 0)
286 // If we get here, the user did not enter a valid choice, so we die.
287 std::string choices_list;
288 for (int i = 0; i < num_choices; i++)
290 choices_list += choices[i];
291 if (i != num_choices - 1)
292 choices_list += ", ";
294 gold_fatal(_("%s: must take one of the following arguments: %s"),
295 option_name, choices_list.c_str());
298 } // End namespace options.
300 // Define the handler for "special" options (set via DEFINE_special).
303 General_options::parse_help(const char*, const char*, Command_line*)
306 ::exit(EXIT_SUCCESS);
310 General_options::parse_version(const char* opt, const char*, Command_line*)
312 bool print_short = (opt[0] == '-' && opt[1] == 'v');
313 gold::print_version(print_short);
314 this->printed_version_ = true;
316 ::exit(EXIT_SUCCESS);
320 General_options::parse_V(const char*, const char*, Command_line*)
322 gold::print_version(true);
323 this->printed_version_ = true;
325 printf(_(" Supported targets:\n"));
326 std::vector<const char*> supported_names;
327 gold::supported_target_names(&supported_names);
328 for (std::vector<const char*>::const_iterator p = supported_names.begin();
329 p != supported_names.end();
333 printf(_(" Supported emulations:\n"));
334 supported_names.clear();
335 gold::supported_emulation_names(&supported_names);
336 for (std::vector<const char*>::const_iterator p = supported_names.begin();
337 p != supported_names.end();
343 General_options::parse_defsym(const char*, const char* arg,
344 Command_line* cmdline)
346 cmdline->script_options().define_symbol(arg);
350 General_options::parse_incremental(const char*, const char*,
353 this->incremental_mode_ = INCREMENTAL_AUTO;
357 General_options::parse_no_incremental(const char*, const char*,
360 this->incremental_mode_ = INCREMENTAL_OFF;
364 General_options::parse_incremental_full(const char*, const char*,
367 this->incremental_mode_ = INCREMENTAL_FULL;
371 General_options::parse_incremental_update(const char*, const char*,
374 this->incremental_mode_ = INCREMENTAL_UPDATE;
378 General_options::parse_incremental_changed(const char*, const char*,
381 this->implicit_incremental_ = true;
382 this->incremental_disposition_ = INCREMENTAL_CHANGED;
386 General_options::parse_incremental_unchanged(const char*, const char*,
389 this->implicit_incremental_ = true;
390 this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
394 General_options::parse_incremental_unknown(const char*, const char*,
397 this->implicit_incremental_ = true;
398 this->incremental_disposition_ = INCREMENTAL_CHECK;
402 General_options::parse_incremental_startup_unchanged(const char*, const char*,
405 this->implicit_incremental_ = true;
406 this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED;
410 General_options::parse_library(const char*, const char* arg,
411 Command_line* cmdline)
413 Input_file_argument::Input_file_type type;
417 type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
422 type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
425 Input_file_argument file(name, type, "", false, *this);
426 cmdline->inputs().add_file(file);
429 #ifdef ENABLE_PLUGINS
431 General_options::parse_plugin(const char*, const char* arg,
434 this->add_plugin(arg);
437 // Parse --plugin-opt.
440 General_options::parse_plugin_opt(const char*, const char* arg,
443 this->add_plugin_option(arg);
445 #endif // ENABLE_PLUGINS
448 General_options::parse_R(const char* option, const char* arg,
449 Command_line* cmdline)
452 if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
453 this->add_to_rpath(arg);
455 this->parse_just_symbols(option, arg, cmdline);
459 General_options::parse_just_symbols(const char*, const char* arg,
460 Command_line* cmdline)
462 Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
464 cmdline->inputs().add_file(file);
467 // Handle --section-start.
470 General_options::parse_section_start(const char*, const char* arg,
473 const char* eq = strchr(arg, '=');
476 gold_error(_("invalid argument to --section-start; "
477 "must be SECTION=ADDRESS"));
481 std::string section_name(arg, eq - arg);
484 const char* val_start = eq;
485 if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
489 gold_error(_("--section-start address missing"));
494 for (; *eq != '\0'; ++eq)
498 gold_error(_("--section-start argument %s is not a valid hex number"),
503 addr += hex_value(*eq);
506 this->section_starts_[section_name] = addr;
509 // Look up a --section-start value.
512 General_options::section_start(const char* secname, uint64_t* paddr) const
514 if (this->section_starts_.empty())
516 std::map<std::string, uint64_t>::const_iterator p =
517 this->section_starts_.find(secname);
518 if (p == this->section_starts_.end())
525 General_options::parse_static(const char*, const char*, Command_line*)
527 this->set_static(true);
531 General_options::parse_script(const char*, const char* arg,
532 Command_line* cmdline)
534 if (!read_commandline_script(arg, cmdline))
535 gold::gold_fatal(_("unable to parse script file %s"), arg);
539 General_options::parse_version_script(const char*, const char* arg,
540 Command_line* cmdline)
542 if (!read_version_script(arg, cmdline))
543 gold::gold_fatal(_("unable to parse version script file %s"), arg);
547 General_options::parse_dynamic_list(const char*, const char* arg,
548 Command_line* cmdline)
550 if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
551 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
555 General_options::parse_start_group(const char*, const char*,
556 Command_line* cmdline)
558 cmdline->inputs().start_group();
562 General_options::parse_end_group(const char*, const char*,
563 Command_line* cmdline)
565 cmdline->inputs().end_group();
569 General_options::parse_start_lib(const char*, const char*,
570 Command_line* cmdline)
572 cmdline->inputs().start_lib(cmdline->position_dependent_options());
576 General_options::parse_end_lib(const char*, const char*,
577 Command_line* cmdline)
579 cmdline->inputs().end_lib();
582 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
583 // of names separated by commas or colons and puts them in a linked list.
584 // We implement the same parsing of names here but store names in an unordered
585 // map to speed up searching of names.
588 General_options::parse_exclude_libs(const char*, const char* arg,
595 size_t length = strcspn(p, ",:");
596 this->excluded_libs_.insert(std::string(p, length));
597 p += (p[length] ? length + 1 : length);
601 // The checking logic is based on the function check_excluded_libs() in
602 // ld/ldlang.c of GNU ld but our implementation is different because we use
603 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
604 // ld searches sequentially in the excluded libs list. For a given archive,
605 // a match is found if the archive's name matches exactly one of the list
606 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
607 // one of the list entry. An entry "ALL" in the list is considered as a
608 // wild-card and matches any given name.
611 General_options::check_excluded_libs(const std::string &name) const
613 Unordered_set<std::string>::const_iterator p;
615 // Exit early for the most common case.
616 if (excluded_libs_.empty())
619 // If we see "ALL", all archives are excluded from automatic export.
620 p = excluded_libs_.find(std::string("ALL"));
621 if (p != excluded_libs_.end())
624 // First strip off any directories in name.
625 const char* basename = lbasename(name.c_str());
627 // Try finding an exact match.
628 p = excluded_libs_.find(std::string(basename));
629 if (p != excluded_libs_.end())
632 // Try matching NAME without ".a" at the end.
633 size_t length = strlen(basename);
635 && (basename[length - 2] == '.')
636 && (basename[length - 1] == 'a'))
638 p = excluded_libs_.find(std::string(basename, length - 2));
639 if (p != excluded_libs_.end())
646 // Recognize input and output target names. The GNU linker accepts
647 // these with --format and --oformat. This code is intended to be
648 // minimally compatible. In practice for an ELF target this would be
649 // the same target as the input files; that name always start with
650 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
653 General_options::Object_format
654 General_options::string_to_object_format(const char* arg)
656 if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0)
657 return gold::General_options::OBJECT_FORMAT_ELF;
658 else if (strcmp(arg, "binary") == 0)
659 return gold::General_options::OBJECT_FORMAT_BINARY;
662 gold::gold_error(_("format '%s' not supported; treating as elf "
663 "(supported formats: elf, binary)"),
665 return gold::General_options::OBJECT_FORMAT_ELF;
670 General_options::parse_fix_v4bx(const char*, const char*,
673 this->fix_v4bx_ = FIX_V4BX_REPLACE;
677 General_options::parse_fix_v4bx_interworking(const char*, const char*,
680 this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
684 General_options::parse_EB(const char*, const char*, Command_line*)
686 this->endianness_ = ENDIANNESS_BIG;
690 General_options::parse_EL(const char*, const char*, Command_line*)
692 this->endianness_ = ENDIANNESS_LITTLE;
695 } // End namespace gold.
704 _("%s: use the --help option for usage information\n"),
706 ::exit(EXIT_FAILURE);
710 usage(const char* msg, const char* opt)
714 gold::program_name, opt, msg);
718 // If the default sysroot is relocatable, try relocating it based on
722 get_relative_sysroot(const char* from)
724 char* path = make_relative_prefix(gold::program_name, from,
729 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
737 // Return the default sysroot. This is set by the --with-sysroot
738 // option to configure. Note we do not free the return value of
739 // get_relative_sysroot, which is a small memory leak, but is
740 // necessary since we store this pointer directly in General_options.
743 get_default_sysroot()
745 const char* sysroot = TARGET_SYSTEM_ROOT;
746 if (*sysroot == '\0')
749 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
751 char* path = get_relative_sysroot(BINDIR);
753 path = get_relative_sysroot(TOOLBINDIR);
761 // Parse a long option. Such options have the form
762 // <-|--><option>[=arg]. If "=arg" is not present but the option
763 // takes an argument, the next word is taken to the be the argument.
764 // If equals_only is set, then only the <option>=<arg> form is
765 // accepted, not the <option><space><arg> form. Returns a One_option
766 // struct or NULL if argv[i] cannot be parsed as a long option. In
767 // the not-NULL case, *arg is set to the option's argument (NULL if
768 // the option takes no argument), and *i is advanced past this option.
769 // NOTE: it is safe for argv and arg to point to the same place.
770 gold::options::One_option*
771 parse_long_option(int argc, const char** argv, bool equals_only,
772 const char** arg, int* i)
774 const char* const this_argv = argv[*i];
776 const char* equals = strchr(this_argv, '=');
777 const char* option_start = this_argv + strspn(this_argv, "-");
778 std::string option(option_start,
779 equals ? equals - option_start : strlen(option_start));
781 gold::options::Option_map::iterator it
782 = gold::options::long_options->find(option);
783 if (it == gold::options::long_options->end())
786 gold::options::One_option* retval = it->second;
788 // If the dash-count doesn't match, we fail.
789 if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
791 if (retval->dashes != gold::options::DASH_Z)
794 else if (this_argv[1] != '-') // one dash
796 if (retval->dashes != gold::options::ONE_DASH
797 && retval->dashes != gold::options::EXACTLY_ONE_DASH
798 && retval->dashes != gold::options::TWO_DASHES)
801 else // two dashes (or more!)
803 if (retval->dashes != gold::options::TWO_DASHES
804 && retval->dashes != gold::options::EXACTLY_TWO_DASHES
805 && retval->dashes != gold::options::ONE_DASH)
809 // Now that we know the option is good (or else bad in a way that
810 // will cause us to die), increment i to point past this argv.
813 // Figure out the option's argument, if any.
814 if (!retval->takes_argument())
817 usage(_("unexpected argument"), this_argv);
825 else if (retval->takes_optional_argument())
826 *arg = retval->default_value;
827 else if (*i < argc && !equals_only)
830 usage(_("missing argument"), this_argv);
836 // Parse a short option. Such options have the form -<option>[arg].
837 // If "arg" is not present but the option takes an argument, the next
838 // word is taken to the be the argument. If the option does not take
839 // an argument, it may be followed by another short option. Returns a
840 // One_option struct or NULL if argv[i] cannot be parsed as a short
841 // option. In the not-NULL case, *arg is set to the option's argument
842 // (NULL if the option takes no argument), and *i is advanced past
843 // this option. This function keeps *i the same if we parsed a short
844 // option that does not take an argument, that looks to be followed by
845 // another short option in the same word.
846 gold::options::One_option*
847 parse_short_option(int argc, const char** argv, int pos_in_argv_i,
848 const char** arg, int* i)
850 const char* const this_argv = argv[*i];
852 if (this_argv[0] != '-')
855 // We handle -z as a special case.
856 static gold::options::One_option dash_z("", gold::options::DASH_Z,
857 'z', "", NULL, "Z-OPTION", false,
859 gold::options::One_option* retval = NULL;
860 if (this_argv[pos_in_argv_i] == 'z')
864 const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
865 if (char_as_int > 0 && char_as_int < 128)
866 retval = gold::options::short_options[char_as_int];
872 // Figure out the option's argument, if any.
873 if (!retval->takes_argument())
876 // We only advance past this argument if it's the only one in argv.
877 if (this_argv[pos_in_argv_i + 1] == '\0')
882 // If we take an argument, we'll eat up this entire argv entry.
884 if (this_argv[pos_in_argv_i + 1] != '\0')
885 *arg = this_argv + pos_in_argv_i + 1;
886 else if (retval->takes_optional_argument())
887 *arg = retval->default_value;
891 usage(_("missing argument"), this_argv);
894 // If we're a -z option, we need to parse our argument as a
895 // long-option, e.g. "-z stacksize=8192".
896 if (retval == &dash_z)
899 const char* dash_z_arg = *arg;
900 retval = parse_long_option(1, arg, true, arg, &dummy_i);
902 usage(_("unknown -z option"), dash_z_arg);
908 } // End anonymous namespace.
913 General_options::General_options()
914 : printed_version_(false),
915 execstack_status_(EXECSTACK_FROM_INPUT),
916 icf_status_(ICF_NONE),
921 incremental_mode_(INCREMENTAL_OFF),
922 incremental_disposition_(INCREMENTAL_STARTUP),
923 incremental_startup_disposition_(INCREMENTAL_CHECK),
924 implicit_incremental_(false),
926 symbols_to_retain_(),
928 fix_v4bx_(FIX_V4BX_NONE),
929 endianness_(ENDIANNESS_NOT_SET)
931 // Turn off option registration once construction is complete.
932 gold::options::ready_to_register = false;
935 General_options::Object_format
936 General_options::format_enum() const
938 return General_options::string_to_object_format(this->format());
941 General_options::Object_format
942 General_options::oformat_enum() const
944 return General_options::string_to_object_format(this->oformat());
947 // Add the sysroot, if any, to the search paths.
950 General_options::add_sysroot()
952 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
954 this->set_sysroot(get_default_sysroot());
955 if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
959 char* canonical_sysroot = lrealpath(this->sysroot());
961 for (Dir_list::iterator p = this->library_path_.value.begin();
962 p != this->library_path_.value.end();
964 p->add_sysroot(this->sysroot(), canonical_sysroot);
966 free(canonical_sysroot);
969 // Return whether FILENAME is in a system directory.
972 General_options::is_in_system_directory(const std::string& filename) const
974 for (Dir_list::const_iterator p = this->library_path_.value.begin();
975 p != this->library_path_.value.end();
978 // We use a straight string comparison rather than calling
979 // FILENAME_CMP because we are only interested in the cases
980 // where we found the file in a system directory, which means
981 // that we used the directory name as a prefix for a -L search.
982 if (p->is_system_directory()
983 && filename.compare(0, p->name().size(), p->name()) == 0)
989 // Add a plugin to the list of plugins.
992 General_options::add_plugin(const char* filename)
994 if (this->plugins_ == NULL)
995 this->plugins_ = new Plugin_manager(*this);
996 this->plugins_->add_plugin(filename);
999 // Add a plugin option to a plugin.
1002 General_options::add_plugin_option(const char* arg)
1004 if (this->plugins_ == NULL)
1005 gold_fatal("--plugin-opt requires --plugin.");
1006 this->plugins_->add_plugin_option(arg);
1009 // Set up variables and other state that isn't set up automatically by
1010 // the parse routine, and ensure options don't contradict each other
1011 // and are otherwise kosher.
1014 General_options::finalize()
1016 // Normalize the strip modifiers. They have a total order:
1017 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
1018 // If one is true, set all beneath it to true as well.
1019 if (this->strip_all())
1020 this->set_strip_debug(true);
1021 if (this->strip_debug())
1022 this->set_strip_debug_non_line(true);
1023 if (this->strip_debug_non_line())
1024 this->set_strip_debug_gdb(true);
1026 if (this->Bshareable())
1027 this->set_shared(true);
1029 // If the user specifies both -s and -r, convert the -s to -S.
1030 // -r requires us to keep externally visible symbols!
1031 if (this->strip_all() && this->relocatable())
1033 this->set_strip_all(false);
1034 gold_assert(this->strip_debug());
1037 // For us, -dc and -dp are synonyms for --define-common.
1039 this->set_define_common(true);
1041 this->set_define_common(true);
1043 // We also set --define-common if we're not relocatable, as long as
1044 // the user didn't explicitly ask for something different.
1045 if (!this->user_set_define_common())
1046 this->set_define_common(!this->relocatable());
1048 // execstack_status_ is a three-state variable; update it based on
1049 // -z [no]execstack.
1050 if (this->execstack())
1051 this->set_execstack_status(EXECSTACK_YES);
1052 else if (this->noexecstack())
1053 this->set_execstack_status(EXECSTACK_NO);
1055 // icf_status_ is a three-state variable; update it based on the
1056 // value of this->icf().
1057 if (strcmp(this->icf(), "none") == 0)
1058 this->set_icf_status(ICF_NONE);
1059 else if (strcmp(this->icf(), "safe") == 0)
1060 this->set_icf_status(ICF_SAFE);
1062 this->set_icf_status(ICF_ALL);
1064 // Handle the optional argument for --demangle.
1065 if (this->user_set_demangle())
1067 this->set_do_demangle(true);
1068 const char* style = this->demangle();
1071 enum demangling_styles style_code;
1073 style_code = cplus_demangle_name_to_style(style);
1074 if (style_code == unknown_demangling)
1075 gold_fatal("unknown demangling style '%s'", style);
1076 cplus_demangle_set_style(style_code);
1079 else if (this->user_set_no_demangle())
1080 this->set_do_demangle(false);
1083 // Testing COLLECT_NO_DEMANGLE makes our default demangling
1084 // behaviour identical to that of gcc's linker wrapper.
1085 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
1088 // -M is equivalent to "-Map -".
1089 if (this->print_map() && !this->user_set_Map())
1092 this->set_user_set_Map();
1095 // Using -n or -N implies -static.
1096 if (this->nmagic() || this->omagic())
1097 this->set_static(true);
1099 // If --thread_count is specified, it applies to
1100 // --thread-count-{initial,middle,final}, though it doesn't override
1102 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
1103 this->set_thread_count_initial(this->thread_count());
1104 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
1105 this->set_thread_count_middle(this->thread_count());
1106 if (this->thread_count() > 0 && this->thread_count_final() == 0)
1107 this->set_thread_count_final(this->thread_count());
1109 // Let's warn if you set the thread-count but we're going to ignore it.
1110 #ifndef ENABLE_THREADS
1111 if (this->threads())
1113 gold_warning(_("ignoring --threads: "
1114 "%s was compiled without thread support"),
1116 this->set_threads(false);
1118 if (this->thread_count() > 0 || this->thread_count_initial() > 0
1119 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
1120 gold_warning(_("ignoring --thread-count: "
1121 "%s was compiled without thread support"),
1125 std::string libpath;
1126 if (this->user_set_Y())
1128 libpath = this->Y();
1129 if (libpath.compare(0, 2, "P,") == 0)
1130 libpath.erase(0, 2);
1132 else if (!this->nostdlib())
1134 #ifndef NATIVE_LINKER
1135 #define NATIVE_LINKER 0
1137 const char* p = LIB_PATH;
1138 if (strcmp(p, "::DEFAULT::") != 0)
1140 else if (NATIVE_LINKER
1141 || this->user_set_sysroot()
1142 || *TARGET_SYSTEM_ROOT != '\0')
1144 this->add_to_library_path_with_sysroot("/lib");
1145 this->add_to_library_path_with_sysroot("/usr/lib");
1148 this->add_to_library_path_with_sysroot(TOOLLIBDIR);
1151 if (!libpath.empty())
1157 next_pos = libpath.find(':', pos);
1158 size_t len = (next_pos == std::string::npos
1162 this->add_to_library_path_with_sysroot(libpath.substr(pos, len));
1165 while (next_pos != std::string::npos);
1168 // Parse the contents of -retain-symbols-file into a set.
1169 if (this->retain_symbols_file())
1172 in.open(this->retain_symbols_file());
1174 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
1175 this->retain_symbols_file(), strerror(errno));
1177 std::getline(in, line); // this chops off the trailing \n, if any
1180 if (!line.empty() && line[line.length() - 1] == '\r') // Windows
1181 line.resize(line.length() - 1);
1182 this->symbols_to_retain_.insert(line);
1183 std::getline(in, line);
1187 // -Bgroup implies --unresolved-symbols=report-all.
1188 if (this->Bgroup() && !this->user_set_unresolved_symbols())
1189 this->set_unresolved_symbols("report-all");
1191 // -shared implies --allow-shlib-undefined. Currently
1192 // ---allow-shlib-undefined controls warnings issued based on the
1193 // -symbol table. --unresolved-symbols controls warnings issued
1194 // -based on relocations.
1195 if (this->shared() && !this->user_set_allow_shlib_undefined())
1196 this->set_allow_shlib_undefined(true);
1198 // Normalize library_path() by adding the sysroot to all directories
1199 // in the path, as appropriate.
1200 this->add_sysroot();
1202 // Now that we've normalized the options, check for contradictory ones.
1203 if (this->shared() && this->is_static())
1204 gold_fatal(_("-shared and -static are incompatible"));
1205 if (this->shared() && this->pie())
1206 gold_fatal(_("-shared and -pie are incompatible"));
1207 if (this->pie() && this->is_static())
1208 gold_fatal(_("-pie and -static are incompatible"));
1210 if (this->shared() && this->relocatable())
1211 gold_fatal(_("-shared and -r are incompatible"));
1212 if (this->pie() && this->relocatable())
1213 gold_fatal(_("-pie and -r are incompatible"));
1215 if (!this->shared())
1217 if (this->filter() != NULL)
1218 gold_fatal(_("-F/--filter may not used without -shared"));
1219 if (this->any_auxiliary())
1220 gold_fatal(_("-f/--auxiliary may not be used without -shared"));
1223 // TODO: implement support for -retain-symbols-file with -r, if needed.
1224 if (this->relocatable() && this->retain_symbols_file())
1225 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
1227 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
1230 || this->relocatable()))
1231 gold_fatal(_("binary output format not compatible "
1232 "with -shared or -pie or -r"));
1234 if (this->user_set_hash_bucket_empty_fraction()
1235 && (this->hash_bucket_empty_fraction() < 0.0
1236 || this->hash_bucket_empty_fraction() >= 1.0))
1237 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
1239 this->hash_bucket_empty_fraction());
1241 if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
1242 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
1243 "--incremental-unknown require the use of --incremental"));
1245 // Check for options that are not compatible with incremental linking.
1246 // Where an option can be disabled without seriously changing the semantics
1247 // of the link, we turn the option off; otherwise, we issue a fatal error.
1249 if (this->incremental_mode_ != INCREMENTAL_OFF)
1251 if (this->relocatable())
1252 gold_fatal(_("incremental linking is not compatible with -r"));
1253 if (this->emit_relocs())
1254 gold_fatal(_("incremental linking is not compatible with "
1256 if (this->has_plugins())
1257 gold_fatal(_("incremental linking is not compatible with --plugin"));
1258 if (this->gc_sections())
1260 gold_warning(_("ignoring --gc-sections for an incremental link"));
1261 this->set_gc_sections(false);
1263 if (this->icf_enabled())
1265 gold_warning(_("ignoring --icf for an incremental link"));
1266 this->set_icf_status(ICF_NONE);
1268 if (strcmp(this->compress_debug_sections(), "none") != 0)
1270 gold_warning(_("ignoring --compress-debug-sections for an "
1271 "incremental link"));
1272 this->set_compress_debug_sections("none");
1276 // --rosegment-gap implies --rosegment.
1277 if (this->user_set_rosegment_gap())
1278 this->set_rosegment(true);
1280 // FIXME: we can/should be doing a lot more sanity checking here.
1283 // Search_directory methods.
1285 // This is called if we have a sysroot. Apply the sysroot if
1286 // appropriate. Record whether the directory is in the sysroot.
1289 Search_directory::add_sysroot(const char* sysroot,
1290 const char* canonical_sysroot)
1292 gold_assert(*sysroot != '\0');
1293 if (this->put_in_sysroot_)
1295 if (!IS_DIR_SEPARATOR(this->name_[0])
1296 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
1297 this->name_ = '/' + this->name_;
1298 this->name_ = sysroot + this->name_;
1299 this->is_in_sysroot_ = true;
1303 // Check whether this entry is in the sysroot. To do this
1304 // correctly, we need to use canonical names. Otherwise we will
1305 // get confused by the ../../.. paths that gcc tends to use.
1306 char* canonical_name = lrealpath(this->name_.c_str());
1307 int canonical_name_len = strlen(canonical_name);
1308 int canonical_sysroot_len = strlen(canonical_sysroot);
1309 if (canonical_name_len > canonical_sysroot_len
1310 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
1312 canonical_name[canonical_sysroot_len] = '\0';
1313 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
1314 this->is_in_sysroot_ = true;
1316 free(canonical_name);
1320 // Input_arguments methods.
1322 // Add a file to the list.
1325 Input_arguments::add_file(Input_file_argument& file)
1327 file.set_arg_serial(++this->file_count_);
1328 if (this->in_group_)
1330 gold_assert(!this->input_argument_list_.empty());
1331 gold_assert(this->input_argument_list_.back().is_group());
1332 return this->input_argument_list_.back().group()->add_file(file);
1336 gold_assert(!this->input_argument_list_.empty());
1337 gold_assert(this->input_argument_list_.back().is_lib());
1338 return this->input_argument_list_.back().lib()->add_file(file);
1340 this->input_argument_list_.push_back(Input_argument(file));
1341 return this->input_argument_list_.back();
1347 Input_arguments::start_group()
1349 if (this->in_group_)
1350 gold_fatal(_("May not nest groups"));
1352 gold_fatal(_("may not nest groups in libraries"));
1353 Input_file_group* group = new Input_file_group();
1354 this->input_argument_list_.push_back(Input_argument(group));
1355 this->in_group_ = true;
1361 Input_arguments::end_group()
1363 if (!this->in_group_)
1364 gold_fatal(_("Group end without group start"));
1365 this->in_group_ = false;
1371 Input_arguments::start_lib(const Position_dependent_options& options)
1374 gold_fatal(_("may not nest libraries"));
1375 if (this->in_group_)
1376 gold_fatal(_("may not nest libraries in groups"));
1377 Input_file_lib* lib = new Input_file_lib(options);
1378 this->input_argument_list_.push_back(Input_argument(lib));
1379 this->in_lib_ = true;
1385 Input_arguments::end_lib()
1388 gold_fatal(_("lib end without lib start"));
1389 this->in_lib_ = false;
1392 // Command_line options.
1394 Command_line::Command_line()
1398 // Pre_options is the hook that sets the ready_to_register flag.
1400 Command_line::Pre_options::Pre_options()
1402 gold::options::ready_to_register = true;
1405 // Process the command line options. For process_one_option, i is the
1406 // index of argv to process next, and must be an option (that is,
1407 // start with a dash). The return value is the index of the next
1408 // option to process (i+1 or i+2, or argc to indicate processing is
1409 // done). no_more_options is set to true if (and when) "--" is seen
1413 Command_line::process_one_option(int argc, const char** argv, int i,
1414 bool* no_more_options)
1416 gold_assert(argv[i][0] == '-' && !(*no_more_options));
1418 // If we are reading "--", then just set no_more_options and return.
1419 if (argv[i][1] == '-' && argv[i][2] == '\0')
1421 *no_more_options = true;
1426 options::One_option* option = NULL;
1427 const char* arg = NULL;
1429 // First, try to process argv as a long option.
1430 option = parse_long_option(argc, argv, false, &arg, &new_i);
1433 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1437 // Now, try to process argv as a short option. Since several short
1438 // options can be combined in one argv, we may have to parse a lot
1439 // until we're done reading this argv.
1440 int pos_in_argv_i = 1;
1443 option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
1446 option->reader->parse_to_value(argv[i], arg, this, &this->options_);
1452 // I guess it's neither a long option nor a short option.
1453 usage(_("unknown option"), argv[i]);
1459 Command_line::process(int argc, const char** argv)
1461 bool no_more_options = false;
1465 this->position_options_.copy_from_options(this->options());
1466 if (no_more_options || argv[i][0] != '-')
1468 Input_file_argument file(argv[i],
1469 Input_file_argument::INPUT_FILE_TYPE_FILE,
1470 "", false, this->position_options_);
1471 this->inputs_.add_file(file);
1475 i = process_one_option(argc, argv, i, &no_more_options);
1478 if (this->inputs_.in_group())
1480 fprintf(stderr, _("%s: missing group end\n"), program_name);
1484 // Normalize the options and ensure they don't contradict each other.
1485 this->options_.finalize();
1488 // Finalize the version script options and return them.
1490 const Version_script_info&
1491 Command_line::version_script()
1493 this->options_.finalize_dynamic_list();
1494 Version_script_info* vsi = this->script_options_.version_script_info();
1499 } // End namespace gold.