1// options.c -- handle command line options for gold 2 3// Copyright (C) 2006-2020 Free Software Foundation, Inc. 4// Written by Ian Lance Taylor <iant@google.com>. 5 6// This file is part of gold. 7 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. 12 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. 17 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. 22 23#include "gold.h" 24 25#include <cerrno> 26#include <cstdlib> 27#include <cstring> 28#include <fstream> 29#include <vector> 30#include <iostream> 31#include <sys/stat.h> 32#include "filenames.h" 33#include "libiberty.h" 34#include "demangle.h" 35#include "../bfd/bfdver.h" 36 37#include "debug.h" 38#include "script.h" 39#include "target-select.h" 40#include "options.h" 41#include "plugin.h" 42 43namespace gold 44{ 45 46General_options 47Position_dependent_options::default_options_; 48 49namespace options 50{ 51 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. 55static bool ready_to_register = false; 56 57// This global variable is set up as General_options is constructed. 58static std::vector<const One_option*> registered_options; 59 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. 63typedef Unordered_map<std::string, One_option*> Option_map; 64static Option_map* long_options = NULL; 65static One_option* short_options[128]; 66 67void 68One_option::register_option() 69{ 70 if (!ready_to_register) 71 return; 72 73 registered_options.push_back(this); 74 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 77 // first called. 78 if (long_options == NULL) 79 long_options = new Option_map; 80 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; 84 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') 88 { 89 gold_assert(short_options[shortname_as_int] == NULL); 90 short_options[shortname_as_int] = this; 91 } 92} 93 94void 95One_option::print() const 96{ 97 bool comma = false; 98 printf(" "); 99 int len = 2; 100 if (this->shortname != '\0') 101 { 102 len += printf("-%c", this->shortname); 103 if (this->helparg) 104 { 105 // -z takes long-names only. 106 gold_assert(this->dashes != DASH_Z); 107 len += printf(" %s", gettext(this->helparg)); 108 } 109 comma = true; 110 } 111 if (!this->longname.empty() 112 && !(this->longname[0] == this->shortname 113 && this->longname[1] == '\0')) 114 { 115 if (comma) 116 len += printf(", "); 117 switch (this->dashes) 118 { 119 case options::ONE_DASH: case options::EXACTLY_ONE_DASH: 120 len += printf("-"); 121 break; 122 case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES: 123 len += printf("--"); 124 break; 125 case options::DASH_Z: 126 len += printf("-z "); 127 break; 128 default: 129 gold_unreachable(); 130 } 131 len += printf("%s", this->longname.c_str()); 132 if (this->helparg) 133 { 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)); 138 } 139 } 140 141 if (len >= 30) 142 { 143 printf("\n"); 144 len = 0; 145 } 146 for (; len < 30; ++len) 147 std::putchar(' '); 148 149 printf("%s", gettext(this->helpstring)); 150 if (this->is_default) 151 printf(" (%s)", _("default")); 152 printf("\n"); 153} 154 155void 156help() 157{ 158 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name); 159 160 std::vector<const One_option*>::const_iterator it; 161 for (it = registered_options.begin(); it != registered_options.end(); ++it) 162 (*it)->print(); 163 164 // config.guess and libtool.m4 look in ld --help output for the 165 // string "supported targets". 166 printf(_("%s: supported targets:"), gold::program_name); 167 std::vector<const char*> supported_names; 168 gold::supported_target_names(&supported_names); 169 for (std::vector<const char*>::const_iterator p = supported_names.begin(); 170 p != supported_names.end(); 171 ++p) 172 printf(" %s", *p); 173 printf("\n"); 174 175 printf(_("%s: supported emulations:"), gold::program_name); 176 supported_names.clear(); 177 gold::supported_emulation_names(&supported_names); 178 for (std::vector<const char*>::const_iterator p = supported_names.begin(); 179 p != supported_names.end(); 180 ++p) 181 printf(" %s", *p); 182 printf("\n"); 183 184 // REPORT_BUGS_TO is defined in bfd/bfdver.h. 185 const char* report = REPORT_BUGS_TO; 186 if (*report != '\0') 187 printf(_("Report bugs to %s\n"), report); 188} 189 190// For bool, arg will be NULL (boolean options take no argument); 191// we always just set to true. 192void 193parse_bool(const char*, const char*, bool* retval) 194{ 195 *retval = true; 196} 197 198void 199parse_uint(const char* option_name, const char* arg, int* retval) 200{ 201 char* endptr; 202 *retval = strtol(arg, &endptr, 0); 203 if (*endptr != '\0' || *retval < 0) 204 gold_fatal(_("%s: invalid option value (expected an integer): %s"), 205 option_name, arg); 206} 207 208void 209parse_int(const char* option_name, const char* arg, int* retval) 210{ 211 char* endptr; 212 *retval = strtol(arg, &endptr, 0); 213 if (*endptr != '\0') 214 gold_fatal(_("%s: invalid option value (expected an integer): %s"), 215 option_name, arg); 216} 217 218void 219parse_uint64(const char* option_name, const char* arg, uint64_t* retval) 220{ 221 char* endptr; 222 *retval = strtoull(arg, &endptr, 0); 223 if (*endptr != '\0') 224 gold_fatal(_("%s: invalid option value (expected an integer): %s"), 225 option_name, arg); 226} 227 228void 229parse_double(const char* option_name, const char* arg, double* retval) 230{ 231 char* endptr; 232 *retval = strtod(arg, &endptr); 233 if (*endptr != '\0') 234 gold_fatal(_("%s: invalid option value " 235 "(expected a floating point number): %s"), 236 option_name, arg); 237} 238 239void 240parse_percent(const char* option_name, const char* arg, double* retval) 241{ 242 char* endptr; 243 *retval = strtod(arg, &endptr) / 100.0; 244 if (*endptr != '\0') 245 gold_fatal(_("%s: invalid option value " 246 "(expected a floating point number): %s"), 247 option_name, arg); 248} 249 250void 251parse_string(const char* option_name, const char* arg, const char** retval) 252{ 253 if (*arg == '\0') 254 gold_fatal(_("%s: must take a non-empty argument"), option_name); 255 *retval = arg; 256} 257 258void 259parse_optional_string(const char*, const char* arg, const char** retval) 260{ 261 *retval = arg; 262} 263 264void 265parse_dirlist(const char*, const char* arg, Dir_list* retval) 266{ 267 retval->push_back(Search_directory(arg, false)); 268} 269 270void 271parse_set(const char*, const char* arg, String_set* retval) 272{ 273 retval->insert(std::string(arg)); 274} 275 276void 277parse_choices(const char* option_name, const char* arg, const char** retval, 278 const char* choices[], int num_choices) 279{ 280 for (int i = 0; i < num_choices; i++) 281 if (strcmp(choices[i], arg) == 0) 282 { 283 *retval = arg; 284 return; 285 } 286 287 // If we get here, the user did not enter a valid choice, so we die. 288 std::string choices_list; 289 for (int i = 0; i < num_choices; i++) 290 { 291 choices_list += choices[i]; 292 if (i != num_choices - 1) 293 choices_list += ", "; 294 } 295 gold_fatal(_("%s: must take one of the following arguments: %s"), 296 option_name, choices_list.c_str()); 297} 298 299} // End namespace options. 300 301// Define the handler for "special" options (set via DEFINE_special). 302 303void 304General_options::parse_help(const char*, const char*, Command_line*) 305{ 306 options::help(); 307 ::exit(EXIT_SUCCESS); 308} 309 310void 311General_options::parse_version(const char* opt, const char*, Command_line*) 312{ 313 bool print_short = (opt[0] == '-' && opt[1] == 'v'); 314 gold::print_version(print_short); 315 this->printed_version_ = true; 316 if (!print_short) 317 ::exit(EXIT_SUCCESS); 318} 319 320void 321General_options::parse_V(const char*, const char*, Command_line*) 322{ 323 gold::print_version(true); 324 this->printed_version_ = true; 325 326 printf(_(" Supported targets:\n")); 327 std::vector<const char*> supported_names; 328 gold::supported_target_names(&supported_names); 329 for (std::vector<const char*>::const_iterator p = supported_names.begin(); 330 p != supported_names.end(); 331 ++p) 332 printf(" %s\n", *p); 333 334 printf(_(" Supported emulations:\n")); 335 supported_names.clear(); 336 gold::supported_emulation_names(&supported_names); 337 for (std::vector<const char*>::const_iterator p = supported_names.begin(); 338 p != supported_names.end(); 339 ++p) 340 printf(" %s\n", *p); 341} 342 343void 344General_options::parse_defsym(const char*, const char* arg, 345 Command_line* cmdline) 346{ 347 cmdline->script_options().define_symbol(arg); 348} 349 350void 351General_options::parse_discard_all(const char*, const char*, 352 Command_line*) 353{ 354 this->discard_locals_ = DISCARD_ALL; 355} 356 357void 358General_options::parse_discard_locals(const char*, const char*, 359 Command_line*) 360{ 361 this->discard_locals_ = DISCARD_LOCALS; 362} 363 364void 365General_options::parse_discard_none(const char*, const char*, 366 Command_line*) 367{ 368 this->discard_locals_ = DISCARD_NONE; 369} 370 371void 372General_options::parse_incremental(const char*, const char*, 373 Command_line*) 374{ 375 this->incremental_mode_ = INCREMENTAL_AUTO; 376} 377 378void 379General_options::parse_no_incremental(const char*, const char*, 380 Command_line*) 381{ 382 this->incremental_mode_ = INCREMENTAL_OFF; 383} 384 385void 386General_options::parse_incremental_full(const char*, const char*, 387 Command_line*) 388{ 389 this->incremental_mode_ = INCREMENTAL_FULL; 390} 391 392void 393General_options::parse_incremental_update(const char*, const char*, 394 Command_line*) 395{ 396 this->incremental_mode_ = INCREMENTAL_UPDATE; 397} 398 399void 400General_options::parse_incremental_changed(const char*, const char*, 401 Command_line*) 402{ 403 this->implicit_incremental_ = true; 404 this->incremental_disposition_ = INCREMENTAL_CHANGED; 405} 406 407void 408General_options::parse_incremental_unchanged(const char*, const char*, 409 Command_line*) 410{ 411 this->implicit_incremental_ = true; 412 this->incremental_disposition_ = INCREMENTAL_UNCHANGED; 413} 414 415void 416General_options::parse_incremental_unknown(const char*, const char*, 417 Command_line*) 418{ 419 this->implicit_incremental_ = true; 420 this->incremental_disposition_ = INCREMENTAL_CHECK; 421} 422 423void 424General_options::parse_incremental_startup_unchanged(const char*, const char*, 425 Command_line*) 426{ 427 this->implicit_incremental_ = true; 428 this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED; 429} 430 431void 432General_options::parse_library(const char*, const char* arg, 433 Command_line* cmdline) 434{ 435 Input_file_argument::Input_file_type type; 436 const char* name; 437 if (arg[0] == ':') 438 { 439 type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE; 440 name = arg + 1; 441 } 442 else 443 { 444 type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY; 445 name = arg; 446 } 447 Input_file_argument file(name, type, "", false, *this); 448 cmdline->inputs().add_file(file); 449} 450 451void 452General_options::parse_plugin(const char*, const char* arg, 453 Command_line*) 454{ 455 this->add_plugin(arg); 456} 457 458// Parse --plugin-opt. 459 460void 461General_options::parse_plugin_opt(const char*, const char* arg, 462 Command_line*) 463{ 464 this->add_plugin_option(arg); 465} 466 467void 468General_options::parse_no_power10_stubs(const char*, const char*, 469 Command_line*) 470{ 471 this->set_power10_stubs("no"); 472 this->set_user_set_power10_stubs(); 473} 474 475void 476General_options::parse_R(const char* option, const char* arg, 477 Command_line* cmdline) 478{ 479 struct stat s; 480 if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode)) 481 this->add_to_rpath(arg); 482 else 483 this->parse_just_symbols(option, arg, cmdline); 484} 485 486void 487General_options::parse_just_symbols(const char*, const char* arg, 488 Command_line* cmdline) 489{ 490 Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE, 491 "", true, *this); 492 cmdline->inputs().add_file(file); 493} 494 495// Handle --section-start. 496 497void 498General_options::parse_section_start(const char*, const char* arg, 499 Command_line*) 500{ 501 const char* eq = strchr(arg, '='); 502 if (eq == NULL) 503 { 504 gold_error(_("invalid argument to --section-start; " 505 "must be SECTION=ADDRESS")); 506 return; 507 } 508 509 std::string section_name(arg, eq - arg); 510 511 ++eq; 512 const char* val_start = eq; 513 if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X')) 514 eq += 2; 515 if (*eq == '\0') 516 { 517 gold_error(_("--section-start address missing")); 518 return; 519 } 520 uint64_t addr = 0; 521 hex_init(); 522 for (; *eq != '\0'; ++eq) 523 { 524 if (!hex_p(*eq)) 525 { 526 gold_error(_("--section-start argument %s is not a valid hex number"), 527 val_start); 528 return; 529 } 530 addr <<= 4; 531 addr += hex_value(*eq); 532 } 533 534 this->section_starts_[section_name] = addr; 535} 536 537// Look up a --section-start value. 538 539bool 540General_options::section_start(const char* secname, uint64_t* paddr) const 541{ 542 if (this->section_starts_.empty()) 543 return false; 544 std::map<std::string, uint64_t>::const_iterator p = 545 this->section_starts_.find(secname); 546 if (p == this->section_starts_.end()) 547 return false; 548 *paddr = p->second; 549 return true; 550} 551 552void 553General_options::parse_static(const char*, const char*, Command_line*) 554{ 555 this->set_static(true); 556} 557 558void 559General_options::parse_script(const char*, const char* arg, 560 Command_line* cmdline) 561{ 562 if (!read_commandline_script(arg, cmdline)) 563 gold::gold_fatal(_("unable to parse script file %s"), arg); 564} 565 566void 567General_options::parse_version_script(const char*, const char* arg, 568 Command_line* cmdline) 569{ 570 if (!read_version_script(arg, cmdline)) 571 gold::gold_fatal(_("unable to parse version script file %s"), arg); 572} 573 574void 575General_options::parse_dynamic_list(const char*, const char* arg, 576 Command_line* cmdline) 577{ 578 if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_)) 579 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg); 580 this->have_dynamic_list_ = true; 581} 582 583void 584General_options::parse_start_group(const char*, const char*, 585 Command_line* cmdline) 586{ 587 cmdline->inputs().start_group(); 588} 589 590void 591General_options::parse_end_group(const char*, const char*, 592 Command_line* cmdline) 593{ 594 cmdline->inputs().end_group(); 595} 596 597void 598General_options::parse_start_lib(const char*, const char*, 599 Command_line* cmdline) 600{ 601 cmdline->inputs().start_lib(cmdline->position_dependent_options()); 602} 603 604void 605General_options::parse_end_lib(const char*, const char*, 606 Command_line* cmdline) 607{ 608 cmdline->inputs().end_lib(); 609} 610 611// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list 612// of names separated by commas or colons and puts them in a linked list. 613// We implement the same parsing of names here but store names in an unordered 614// map to speed up searching of names. 615 616void 617General_options::parse_exclude_libs(const char*, const char* arg, 618 Command_line*) 619{ 620 const char* p = arg; 621 622 while (*p != '\0') 623 { 624 size_t length = strcspn(p, ",:"); 625 this->excluded_libs_.insert(std::string(p, length)); 626 p += (p[length] ? length + 1 : length); 627 } 628} 629 630// The checking logic is based on the function check_excluded_libs() in 631// ld/ldlang.c of GNU ld but our implementation is different because we use 632// an unordered map instead of a linked list, which is what GNU ld uses. GNU 633// ld searches sequentially in the excluded libs list. For a given archive, 634// a match is found if the archive's name matches exactly one of the list 635// entry or if the archive's name is of the form FOO.a and FOO matches exactly 636// one of the list entry. An entry "ALL" in the list is considered as a 637// wild-card and matches any given name. 638 639bool 640General_options::check_excluded_libs(const std::string &name) const 641{ 642 Unordered_set<std::string>::const_iterator p; 643 644 // Exit early for the most common case. 645 if (excluded_libs_.empty()) 646 return false; 647 648 // If we see "ALL", all archives are excluded from automatic export. 649 p = excluded_libs_.find(std::string("ALL")); 650 if (p != excluded_libs_.end()) 651 return true; 652 653 // First strip off any directories in name. 654 const char* basename = lbasename(name.c_str()); 655 656 // Try finding an exact match. 657 p = excluded_libs_.find(std::string(basename)); 658 if (p != excluded_libs_.end()) 659 return true; 660 661 // Try matching NAME without ".a" at the end. 662 size_t length = strlen(basename); 663 if ((length >= 2) 664 && (basename[length - 2] == '.') 665 && (basename[length - 1] == 'a')) 666 { 667 p = excluded_libs_.find(std::string(basename, length - 2)); 668 if (p != excluded_libs_.end()) 669 return true; 670 } 671 672 return false; 673} 674 675// Recognize input and output target names. The GNU linker accepts 676// these with --format and --oformat. This code is intended to be 677// minimally compatible. In practice for an ELF target this would be 678// the same target as the input files; that name always start with 679// "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex", 680// "binary", "ihex". 681 682General_options::Object_format 683General_options::string_to_object_format(const char* arg) 684{ 685 if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0) 686 return gold::General_options::OBJECT_FORMAT_ELF; 687 else if (strcmp(arg, "binary") == 0) 688 return gold::General_options::OBJECT_FORMAT_BINARY; 689 else 690 { 691 gold::gold_error(_("format '%s' not supported; treating as elf " 692 "(supported formats: elf, binary)"), 693 arg); 694 return gold::General_options::OBJECT_FORMAT_ELF; 695 } 696} 697 698const char* 699General_options::object_format_to_string(General_options::Object_format fmt) 700{ 701 switch (fmt) 702 { 703 case General_options::OBJECT_FORMAT_ELF: 704 return "elf"; 705 case General_options::OBJECT_FORMAT_BINARY: 706 return "binary"; 707 default: 708 gold_unreachable(); 709 } 710} 711 712void 713General_options::parse_fix_v4bx(const char*, const char*, 714 Command_line*) 715{ 716 this->fix_v4bx_ = FIX_V4BX_REPLACE; 717} 718 719void 720General_options::parse_fix_v4bx_interworking(const char*, const char*, 721 Command_line*) 722{ 723 this->fix_v4bx_ = FIX_V4BX_INTERWORKING; 724} 725 726void 727General_options::parse_EB(const char*, const char*, Command_line*) 728{ 729 this->endianness_ = ENDIANNESS_BIG; 730} 731 732void 733General_options::parse_EL(const char*, const char*, Command_line*) 734{ 735 this->endianness_ = ENDIANNESS_LITTLE; 736} 737 738void 739General_options::copy_from_posdep_options( 740 const Position_dependent_options& posdep) 741{ 742 this->set_as_needed(posdep.as_needed()); 743 this->set_Bdynamic(posdep.Bdynamic()); 744 this->set_format( 745 General_options::object_format_to_string(posdep.format_enum())); 746 this->set_whole_archive(posdep.whole_archive()); 747 this->set_incremental_disposition(posdep.incremental_disposition()); 748} 749 750void 751General_options::parse_push_state(const char*, const char*, Command_line*) 752{ 753 Position_dependent_options* posdep = new Position_dependent_options(*this); 754 this->options_stack_.push_back(posdep); 755} 756 757void 758General_options::parse_pop_state(const char*, const char*, Command_line*) 759{ 760 if (this->options_stack_.empty()) 761 { 762 gold::gold_error(_("unbalanced --push-state/--pop-state")); 763 return; 764 } 765 Position_dependent_options* posdep = this->options_stack_.back(); 766 this->options_stack_.pop_back(); 767 this->copy_from_posdep_options(*posdep); 768 delete posdep; 769} 770 771} // End namespace gold. 772 773namespace 774{ 775 776void 777usage() 778{ 779 fprintf(stderr, 780 _("%s: use the --help option for usage information\n"), 781 gold::program_name); 782 ::exit(EXIT_FAILURE); 783} 784 785void 786usage(const char* msg, const char* opt) 787{ 788 fprintf(stderr, 789 _("%s: %s: %s\n"), 790 gold::program_name, opt, msg); 791 usage(); 792} 793 794// If the default sysroot is relocatable, try relocating it based on 795// the prefix FROM. 796 797static char* 798get_relative_sysroot(const char* from) 799{ 800 char* path = make_relative_prefix(gold::program_name, from, 801 TARGET_SYSTEM_ROOT); 802 if (path != NULL) 803 { 804 struct stat s; 805 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode)) 806 return path; 807 free(path); 808 } 809 810 return NULL; 811} 812 813// Return the default sysroot. This is set by the --with-sysroot 814// option to configure. Note we do not free the return value of 815// get_relative_sysroot, which is a small memory leak, but is 816// necessary since we store this pointer directly in General_options. 817 818static const char* 819get_default_sysroot() 820{ 821 const char* sysroot = TARGET_SYSTEM_ROOT; 822 if (*sysroot == '\0') 823 return NULL; 824 825 if (TARGET_SYSTEM_ROOT_RELOCATABLE) 826 { 827 char* path = get_relative_sysroot(BINDIR); 828 if (path == NULL) 829 path = get_relative_sysroot(TOOLBINDIR); 830 if (path != NULL) 831 return path; 832 } 833 834 return sysroot; 835} 836 837// Parse a long option. Such options have the form 838// <-|--><option>[=arg]. If "=arg" is not present but the option 839// takes an argument, the next word is taken to the be the argument. 840// If equals_only is set, then only the <option>=<arg> form is 841// accepted, not the <option><space><arg> form. Returns a One_option 842// struct or NULL if argv[i] cannot be parsed as a long option. In 843// the not-NULL case, *arg is set to the option's argument (NULL if 844// the option takes no argument), and *i is advanced past this option. 845// NOTE: it is safe for argv and arg to point to the same place. 846gold::options::One_option* 847parse_long_option(int argc, const char** argv, bool equals_only, 848 const char** arg, int* i) 849{ 850 const char* const this_argv = argv[*i]; 851 852 const char* equals = strchr(this_argv, '='); 853 const char* option_start = this_argv + strspn(this_argv, "-"); 854 std::string option(option_start, 855 equals ? equals - option_start : strlen(option_start)); 856 857 gold::options::Option_map::iterator it 858 = gold::options::long_options->find(option); 859 if (it == gold::options::long_options->end()) 860 return NULL; 861 862 gold::options::One_option* retval = it->second; 863 864 // If the dash-count doesn't match, we fail. 865 if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>" 866 { 867 if (retval->dashes != gold::options::DASH_Z) 868 return NULL; 869 } 870 else if (this_argv[1] != '-') // one dash 871 { 872 if (retval->dashes != gold::options::ONE_DASH 873 && retval->dashes != gold::options::EXACTLY_ONE_DASH 874 && retval->dashes != gold::options::TWO_DASHES) 875 return NULL; 876 } 877 else // two dashes (or more!) 878 { 879 if (retval->dashes != gold::options::TWO_DASHES 880 && retval->dashes != gold::options::EXACTLY_TWO_DASHES 881 && retval->dashes != gold::options::ONE_DASH) 882 return NULL; 883 } 884 885 // Now that we know the option is good (or else bad in a way that 886 // will cause us to die), increment i to point past this argv. 887 ++(*i); 888 889 // Figure out the option's argument, if any. 890 if (!retval->takes_argument()) 891 { 892 if (equals) 893 usage(_("unexpected argument"), this_argv); 894 else 895 *arg = NULL; 896 } 897 else 898 { 899 if (equals) 900 *arg = equals + 1; 901 else if (retval->takes_optional_argument()) 902 *arg = retval->default_value; 903 else if (*i < argc && !equals_only) 904 *arg = argv[(*i)++]; 905 else 906 usage(_("missing argument"), this_argv); 907 } 908 909 return retval; 910} 911 912// Parse a short option. Such options have the form -<option>[arg]. 913// If "arg" is not present but the option takes an argument, the next 914// word is taken to the be the argument. If the option does not take 915// an argument, it may be followed by another short option. Returns a 916// One_option struct or NULL if argv[i] cannot be parsed as a short 917// option. In the not-NULL case, *arg is set to the option's argument 918// (NULL if the option takes no argument), and *i is advanced past 919// this option. This function keeps *i the same if we parsed a short 920// option that does not take an argument, that looks to be followed by 921// another short option in the same word. 922gold::options::One_option* 923parse_short_option(int argc, const char** argv, int pos_in_argv_i, 924 const char** arg, int* i) 925{ 926 const char* const this_argv = argv[*i]; 927 928 if (this_argv[0] != '-') 929 return NULL; 930 931 // We handle -z as a special case. 932 static gold::options::One_option dash_z("", gold::options::DASH_Z, 933 'z', "", NULL, "Z-OPTION", false, 934 NULL, false); 935 gold::options::One_option* retval = NULL; 936 if (this_argv[pos_in_argv_i] == 'z') 937 retval = &dash_z; 938 else 939 { 940 const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]); 941 if (char_as_int > 0 && char_as_int < 128) 942 retval = gold::options::short_options[char_as_int]; 943 } 944 945 if (retval == NULL) 946 return NULL; 947 948 // Figure out the option's argument, if any. 949 if (!retval->takes_argument()) 950 { 951 *arg = NULL; 952 // We only advance past this argument if it's the only one in argv. 953 if (this_argv[pos_in_argv_i + 1] == '\0') 954 ++(*i); 955 } 956 else 957 { 958 // If we take an argument, we'll eat up this entire argv entry. 959 ++(*i); 960 if (this_argv[pos_in_argv_i + 1] != '\0') 961 *arg = this_argv + pos_in_argv_i + 1; 962 else if (retval->takes_optional_argument()) 963 *arg = retval->default_value; 964 else if (*i < argc) 965 *arg = argv[(*i)++]; 966 else 967 usage(_("missing argument"), this_argv); 968 } 969 970 // If we're a -z option, we need to parse our argument as a 971 // long-option, e.g. "-z stacksize=8192". 972 if (retval == &dash_z) 973 { 974 int dummy_i = 0; 975 const char* dash_z_arg = *arg; 976 retval = parse_long_option(1, arg, true, arg, &dummy_i); 977 if (retval == NULL) 978 usage(_("unknown -z option"), dash_z_arg); 979 } 980 981 return retval; 982} 983 984} // End anonymous namespace. 985 986namespace gold 987{ 988 989General_options::General_options() 990 : printed_version_(false), 991 execstack_status_(EXECSTACK_FROM_INPUT), 992 icf_status_(ICF_NONE), 993 static_(false), 994 do_demangle_(false), 995 plugins_(NULL), 996 dynamic_list_(), 997 have_dynamic_list_(false), 998 incremental_mode_(INCREMENTAL_OFF), 999 incremental_disposition_(INCREMENTAL_STARTUP), 1000 incremental_startup_disposition_(INCREMENTAL_CHECK), 1001 implicit_incremental_(false), 1002 excluded_libs_(), 1003 symbols_to_retain_(), 1004 section_starts_(), 1005 fix_v4bx_(FIX_V4BX_NONE), 1006 endianness_(ENDIANNESS_NOT_SET), 1007 discard_locals_(DISCARD_SEC_MERGE), 1008 orphan_handling_enum_(ORPHAN_PLACE), 1009 start_stop_visibility_enum_(elfcpp::STV_PROTECTED) 1010{ 1011 // Turn off option registration once construction is complete. 1012 gold::options::ready_to_register = false; 1013} 1014 1015General_options::Object_format 1016General_options::format_enum() const 1017{ 1018 return General_options::string_to_object_format(this->format()); 1019} 1020 1021General_options::Object_format 1022General_options::oformat_enum() const 1023{ 1024 return General_options::string_to_object_format(this->oformat()); 1025} 1026 1027// Add the sysroot, if any, to the search paths. 1028 1029void 1030General_options::add_sysroot() 1031{ 1032 if (this->sysroot() == NULL || this->sysroot()[0] == '\0') 1033 { 1034 this->set_sysroot(get_default_sysroot()); 1035 if (this->sysroot() == NULL || this->sysroot()[0] == '\0') 1036 return; 1037 } 1038 1039 char* canonical_sysroot = lrealpath(this->sysroot()); 1040 1041 for (Dir_list::iterator p = this->library_path_.value.begin(); 1042 p != this->library_path_.value.end(); 1043 ++p) 1044 p->add_sysroot(this->sysroot(), canonical_sysroot); 1045 1046 free(canonical_sysroot); 1047} 1048 1049// Return whether FILENAME is in a system directory. 1050 1051bool 1052General_options::is_in_system_directory(const std::string& filename) const 1053{ 1054 for (Dir_list::const_iterator p = this->library_path_.value.begin(); 1055 p != this->library_path_.value.end(); 1056 ++p) 1057 { 1058 // We use a straight string comparison rather than calling 1059 // FILENAME_CMP because we are only interested in the cases 1060 // where we found the file in a system directory, which means 1061 // that we used the directory name as a prefix for a -L search. 1062 if (p->is_system_directory() 1063 && filename.compare(0, p->name().size(), p->name()) == 0) 1064 return true; 1065 } 1066 return false; 1067} 1068 1069// Add a plugin to the list of plugins. 1070 1071void 1072General_options::add_plugin(const char* filename) 1073{ 1074 if (this->plugins_ == NULL) 1075 this->plugins_ = new Plugin_manager(*this); 1076 this->plugins_->add_plugin(filename); 1077} 1078 1079// Add a plugin option to a plugin. 1080 1081void 1082General_options::add_plugin_option(const char* arg) 1083{ 1084 if (this->plugins_ == NULL) 1085 gold_fatal("--plugin-opt requires --plugin."); 1086 this->plugins_->add_plugin_option(arg); 1087} 1088 1089// Set up variables and other state that isn't set up automatically by 1090// the parse routine, and ensure options don't contradict each other 1091// and are otherwise kosher. 1092 1093void 1094General_options::finalize() 1095{ 1096 // Normalize the strip modifiers. They have a total order: 1097 // strip_all > strip_debug > strip_non_line > strip_debug_gdb. 1098 // If one is true, set all beneath it to true as well. 1099 if (this->strip_all()) 1100 this->set_strip_debug(true); 1101 if (this->strip_debug()) 1102 this->set_strip_debug_non_line(true); 1103 if (this->strip_debug_non_line()) 1104 this->set_strip_debug_gdb(true); 1105 1106 if (this->Bshareable()) 1107 this->set_shared(true); 1108 1109 // If the user specifies both -s and -r, convert the -s to -S. 1110 // -r requires us to keep externally visible symbols! 1111 if (this->strip_all() && this->relocatable()) 1112 { 1113 this->set_strip_all(false); 1114 gold_assert(this->strip_debug()); 1115 } 1116 1117 // For us, -dc and -dp are synonyms for --define-common. 1118 if (this->dc()) 1119 this->set_define_common(true); 1120 if (this->dp()) 1121 this->set_define_common(true); 1122 1123 // We also set --define-common if we're not relocatable, as long as 1124 // the user didn't explicitly ask for something different. 1125 if (!this->user_set_define_common()) 1126 this->set_define_common(!this->relocatable()); 1127 1128 // execstack_status_ is a three-state variable; update it based on 1129 // -z [no]execstack. 1130 if (this->execstack()) 1131 this->set_execstack_status(EXECSTACK_YES); 1132 else if (this->noexecstack()) 1133 this->set_execstack_status(EXECSTACK_NO); 1134 1135 // icf_status_ is a three-state variable; update it based on the 1136 // value of this->icf(). 1137 if (strcmp(this->icf(), "none") == 0) 1138 this->set_icf_status(ICF_NONE); 1139 else if (strcmp(this->icf(), "safe") == 0) 1140 this->set_icf_status(ICF_SAFE); 1141 else 1142 this->set_icf_status(ICF_ALL); 1143 1144 // Handle the optional argument for --demangle. 1145 if (this->user_set_demangle()) 1146 { 1147 this->set_do_demangle(true); 1148 const char* style = this->demangle(); 1149 if (*style != '\0') 1150 { 1151 enum demangling_styles style_code; 1152 1153 style_code = cplus_demangle_name_to_style(style); 1154 if (style_code == unknown_demangling) 1155 gold_fatal("unknown demangling style '%s'", style); 1156 cplus_demangle_set_style(style_code); 1157 } 1158 } 1159 else if (this->user_set_no_demangle()) 1160 this->set_do_demangle(false); 1161 else 1162 { 1163 // Testing COLLECT_NO_DEMANGLE makes our default demangling 1164 // behaviour identical to that of gcc's linker wrapper. 1165 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL); 1166 } 1167 1168 // Parse the --orphan-handling argument. 1169 if (this->user_set_orphan_handling()) 1170 { 1171 if (strcmp(this->orphan_handling(), "place") == 0) 1172 this->set_orphan_handling_enum(ORPHAN_PLACE); 1173 else if (strcmp(this->orphan_handling(), "discard") == 0) 1174 this->set_orphan_handling_enum(ORPHAN_DISCARD); 1175 else if (strcmp(this->orphan_handling(), "warn") == 0) 1176 this->set_orphan_handling_enum(ORPHAN_WARN); 1177 else if (strcmp(this->orphan_handling(), "error") == 0) 1178 this->set_orphan_handling_enum(ORPHAN_ERROR); 1179 } 1180 1181 // Parse the -z start-stop-visibility argument. 1182 if (this->user_set_start_stop_visibility()) 1183 { 1184 if (strcmp(this->start_stop_visibility(), "default") == 0) 1185 this->set_start_stop_visibility_enum(elfcpp::STV_DEFAULT); 1186 else if (strcmp(this->start_stop_visibility(), "internal") == 0) 1187 this->set_start_stop_visibility_enum(elfcpp::STV_INTERNAL); 1188 else if (strcmp(this->start_stop_visibility(), "hidden") == 0) 1189 this->set_start_stop_visibility_enum(elfcpp::STV_HIDDEN); 1190 else if (strcmp(this->start_stop_visibility(), "protected") == 0) 1191 this->set_start_stop_visibility_enum(elfcpp::STV_PROTECTED); 1192 } 1193 1194 // Parse the --power10-stubs argument. 1195 if (!this->user_set_power10_stubs()) 1196 { 1197 // --power10-stubs without an arg is equivalent to --power10-stubs=yes 1198 // but not specifying --power10-stubs at all should be equivalent to 1199 // --power10-stubs=auto. This doesn't fit into the notion of 1200 // "default_value", used both as a static initializer and to provide 1201 // a missing optional arg. Fix it here. 1202 this->set_power10_stubs("auto"); 1203 this->set_power10_stubs_enum(POWER10_STUBS_AUTO); 1204 } 1205 else 1206 { 1207 if (strcmp(this->power10_stubs(), "auto") == 0) 1208 this->set_power10_stubs_enum(POWER10_STUBS_AUTO); 1209 else if (strcmp(this->power10_stubs(), "no") == 0) 1210 this->set_power10_stubs_enum(POWER10_STUBS_NO); 1211 else if (strcmp(this->power10_stubs(), "yes") == 0) 1212 this->set_power10_stubs_enum(POWER10_STUBS_YES); 1213 } 1214 1215 // -M is equivalent to "-Map -". 1216 if (this->print_map() && !this->user_set_Map()) 1217 { 1218 this->set_Map("-"); 1219 this->set_user_set_Map(); 1220 } 1221 1222 // Using -n or -N implies -static. 1223 if (this->nmagic() || this->omagic()) 1224 this->set_static(true); 1225 1226 // If --thread_count is specified, it applies to 1227 // --thread-count-{initial,middle,final}, though it doesn't override 1228 // them. 1229 if (this->thread_count() > 0 && this->thread_count_initial() == 0) 1230 this->set_thread_count_initial(this->thread_count()); 1231 if (this->thread_count() > 0 && this->thread_count_middle() == 0) 1232 this->set_thread_count_middle(this->thread_count()); 1233 if (this->thread_count() > 0 && this->thread_count_final() == 0) 1234 this->set_thread_count_final(this->thread_count()); 1235 1236 // Let's warn if you set the thread-count but we're going to ignore it. 1237#ifndef ENABLE_THREADS 1238 if (this->threads()) 1239 { 1240 gold_warning(_("ignoring --threads: " 1241 "%s was compiled without thread support"), 1242 program_name); 1243 this->set_threads(false); 1244 } 1245 if (this->thread_count() > 0 || this->thread_count_initial() > 0 1246 || this->thread_count_middle() > 0 || this->thread_count_final() > 0) 1247 gold_warning(_("ignoring --thread-count: " 1248 "%s was compiled without thread support"), 1249 program_name); 1250#endif 1251 1252#ifndef ENABLE_PLUGINS 1253 if (this->has_plugins()) 1254 gold_fatal(_("cannot use --plugin: " 1255 "%s was compiled without plugin support"), 1256 program_name); 1257#endif 1258 1259 std::string libpath; 1260 if (this->user_set_Y()) 1261 { 1262 libpath = this->Y(); 1263 if (libpath.compare(0, 2, "P,") == 0) 1264 libpath.erase(0, 2); 1265 } 1266 else if (!this->nostdlib()) 1267 { 1268#ifndef NATIVE_LINKER 1269#define NATIVE_LINKER 0 1270#endif 1271 const char* p = LIB_PATH; 1272 if (strcmp(p, "::DEFAULT::") != 0) 1273 libpath = p; 1274 else if (NATIVE_LINKER 1275 || this->user_set_sysroot() 1276 || *TARGET_SYSTEM_ROOT != '\0') 1277 { 1278 this->add_to_library_path_with_sysroot("/lib"); 1279 this->add_to_library_path_with_sysroot("/usr/lib"); 1280 } 1281 else 1282 this->add_to_library_path_with_sysroot(TOOLLIBDIR); 1283 } 1284 1285 if (!libpath.empty()) 1286 { 1287 size_t pos = 0; 1288 size_t next_pos; 1289 do 1290 { 1291 next_pos = libpath.find(':', pos); 1292 size_t len = (next_pos == std::string::npos 1293 ? next_pos 1294 : next_pos - pos); 1295 if (len != 0) 1296 this->add_to_library_path_with_sysroot(libpath.substr(pos, len)); 1297 pos = next_pos + 1; 1298 } 1299 while (next_pos != std::string::npos); 1300 } 1301 1302 // Parse the contents of -retain-symbols-file into a set. 1303 if (this->retain_symbols_file()) 1304 { 1305 std::ifstream in; 1306 in.open(this->retain_symbols_file()); 1307 if (!in) 1308 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"), 1309 this->retain_symbols_file(), strerror(errno)); 1310 std::string line; 1311 std::getline(in, line); // this chops off the trailing \n, if any 1312 while (in) 1313 { 1314 if (!line.empty() && line[line.length() - 1] == '\r') // Windows 1315 line.resize(line.length() - 1); 1316 this->symbols_to_retain_.insert(line); 1317 std::getline(in, line); 1318 } 1319 } 1320 1321 // -Bgroup implies --unresolved-symbols=report-all. 1322 if (this->Bgroup() && !this->user_set_unresolved_symbols()) 1323 this->set_unresolved_symbols("report-all"); 1324 1325 // -shared implies --allow-shlib-undefined. Currently 1326 // ---allow-shlib-undefined controls warnings issued based on the 1327 // -symbol table. --unresolved-symbols controls warnings issued 1328 // -based on relocations. 1329 if (this->shared() && !this->user_set_allow_shlib_undefined()) 1330 this->set_allow_shlib_undefined(true); 1331 1332 // Normalize library_path() by adding the sysroot to all directories 1333 // in the path, as appropriate. 1334 this->add_sysroot(); 1335 1336 // Now that we've normalized the options, check for contradictory ones. 1337 if (this->shared() && this->is_static()) 1338 gold_fatal(_("-shared and -static are incompatible")); 1339 if (this->shared() && this->pie()) 1340 gold_fatal(_("-shared and -pie are incompatible")); 1341 if (this->pie() && this->is_static()) 1342 gold_fatal(_("-pie and -static are incompatible")); 1343 1344 if (this->shared() && this->relocatable()) 1345 gold_fatal(_("-shared and -r are incompatible")); 1346 if (this->pie() && this->relocatable()) 1347 gold_fatal(_("-pie and -r are incompatible")); 1348 1349 if (!this->shared()) 1350 { 1351 if (this->filter() != NULL) 1352 gold_fatal(_("-F/--filter may not used without -shared")); 1353 if (this->any_auxiliary()) 1354 gold_fatal(_("-f/--auxiliary may not be used without -shared")); 1355 } 1356 1357 // TODO: implement support for -retain-symbols-file with -r, if needed. 1358 if (this->relocatable() && this->retain_symbols_file()) 1359 gold_fatal(_("-retain-symbols-file does not yet work with -r")); 1360 1361 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF 1362 && (this->shared() 1363 || this->pie() 1364 || this->relocatable())) 1365 gold_fatal(_("binary output format not compatible " 1366 "with -shared or -pie or -r")); 1367 1368 if (this->user_set_hash_bucket_empty_fraction() 1369 && (this->hash_bucket_empty_fraction() < 0.0 1370 || this->hash_bucket_empty_fraction() >= 1.0)) 1371 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range " 1372 "[0.0, 1.0)"), 1373 this->hash_bucket_empty_fraction()); 1374 1375 if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF) 1376 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, " 1377 "--incremental-unknown require the use of --incremental")); 1378 1379 // Check for options that are not compatible with incremental linking. 1380 // Where an option can be disabled without seriously changing the semantics 1381 // of the link, we turn the option off; otherwise, we issue a fatal error. 1382 1383 if (this->incremental_mode_ != INCREMENTAL_OFF) 1384 { 1385 if (this->relocatable()) 1386 gold_fatal(_("incremental linking is not compatible with -r")); 1387 if (this->emit_relocs()) 1388 gold_fatal(_("incremental linking is not compatible with " 1389 "--emit-relocs")); 1390 if (this->has_plugins()) 1391 gold_fatal(_("incremental linking is not compatible with --plugin")); 1392 if (this->relro()) 1393 gold_fatal(_("incremental linking is not compatible with -z relro")); 1394 if (this->pie()) 1395 gold_fatal(_("incremental linking is not compatible with -pie")); 1396 if (this->gc_sections()) 1397 { 1398 gold_warning(_("ignoring --gc-sections for an incremental link")); 1399 this->set_gc_sections(false); 1400 } 1401 if (this->icf_enabled()) 1402 { 1403 gold_warning(_("ignoring --icf for an incremental link")); 1404 this->set_icf_status(ICF_NONE); 1405 } 1406 if (strcmp(this->compress_debug_sections(), "none") != 0) 1407 { 1408 gold_warning(_("ignoring --compress-debug-sections for an " 1409 "incremental link")); 1410 this->set_compress_debug_sections("none"); 1411 } 1412 } 1413 1414 // --rosegment-gap implies --rosegment. 1415 if (this->user_set_rosegment_gap()) 1416 this->set_rosegment(true); 1417 1418 // FIXME: we can/should be doing a lot more sanity checking here. 1419} 1420 1421// Search_directory methods. 1422 1423// This is called if we have a sysroot. Apply the sysroot if 1424// appropriate. Record whether the directory is in the sysroot. 1425 1426void 1427Search_directory::add_sysroot(const char* sysroot, 1428 const char* canonical_sysroot) 1429{ 1430 gold_assert(*sysroot != '\0'); 1431 if (this->put_in_sysroot_) 1432 { 1433 if (!IS_DIR_SEPARATOR(this->name_[0]) 1434 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1])) 1435 this->name_ = '/' + this->name_; 1436 this->name_ = sysroot + this->name_; 1437 this->is_in_sysroot_ = true; 1438 } 1439 else 1440 { 1441 // Check whether this entry is in the sysroot. To do this 1442 // correctly, we need to use canonical names. Otherwise we will 1443 // get confused by the ../../.. paths that gcc tends to use. 1444 char* canonical_name = lrealpath(this->name_.c_str()); 1445 int canonical_name_len = strlen(canonical_name); 1446 int canonical_sysroot_len = strlen(canonical_sysroot); 1447 if (canonical_name_len > canonical_sysroot_len 1448 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len])) 1449 { 1450 canonical_name[canonical_sysroot_len] = '\0'; 1451 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0) 1452 this->is_in_sysroot_ = true; 1453 } 1454 free(canonical_name); 1455 } 1456} 1457 1458// Input_arguments methods. 1459 1460// Add a file to the list. 1461 1462Input_argument& 1463Input_arguments::add_file(Input_file_argument& file) 1464{ 1465 file.set_arg_serial(++this->file_count_); 1466 if (this->in_group_) 1467 { 1468 gold_assert(!this->input_argument_list_.empty()); 1469 gold_assert(this->input_argument_list_.back().is_group()); 1470 return this->input_argument_list_.back().group()->add_file(file); 1471 } 1472 if (this->in_lib_) 1473 { 1474 gold_assert(!this->input_argument_list_.empty()); 1475 gold_assert(this->input_argument_list_.back().is_lib()); 1476 return this->input_argument_list_.back().lib()->add_file(file); 1477 } 1478 this->input_argument_list_.push_back(Input_argument(file)); 1479 return this->input_argument_list_.back(); 1480} 1481 1482// Start a group. 1483 1484void 1485Input_arguments::start_group() 1486{ 1487 if (this->in_group_) 1488 gold_fatal(_("May not nest groups")); 1489 if (this->in_lib_) 1490 gold_fatal(_("may not nest groups in libraries")); 1491 Input_file_group* group = new Input_file_group(); 1492 this->input_argument_list_.push_back(Input_argument(group)); 1493 this->in_group_ = true; 1494} 1495 1496// End a group. 1497 1498void 1499Input_arguments::end_group() 1500{ 1501 if (!this->in_group_) 1502 gold_fatal(_("Group end without group start")); 1503 this->in_group_ = false; 1504} 1505 1506// Start a lib. 1507 1508void 1509Input_arguments::start_lib(const Position_dependent_options& options) 1510{ 1511 if (this->in_lib_) 1512 gold_fatal(_("may not nest libraries")); 1513 if (this->in_group_) 1514 gold_fatal(_("may not nest libraries in groups")); 1515 Input_file_lib* lib = new Input_file_lib(options); 1516 this->input_argument_list_.push_back(Input_argument(lib)); 1517 this->in_lib_ = true; 1518} 1519 1520// End a lib. 1521 1522void 1523Input_arguments::end_lib() 1524{ 1525 if (!this->in_lib_) 1526 gold_fatal(_("lib end without lib start")); 1527 this->in_lib_ = false; 1528} 1529 1530// Command_line options. 1531 1532Command_line::Command_line() 1533{ 1534} 1535 1536// Pre_options is the hook that sets the ready_to_register flag. 1537 1538Command_line::Pre_options::Pre_options() 1539{ 1540 gold::options::ready_to_register = true; 1541} 1542 1543// Process the command line options. For process_one_option, i is the 1544// index of argv to process next, and must be an option (that is, 1545// start with a dash). The return value is the index of the next 1546// option to process (i+1 or i+2, or argc to indicate processing is 1547// done). no_more_options is set to true if (and when) "--" is seen 1548// as an option. 1549 1550int 1551Command_line::process_one_option(int argc, const char** argv, int i, 1552 bool* no_more_options) 1553{ 1554 gold_assert(argv[i][0] == '-' && !(*no_more_options)); 1555 1556 // If we are reading "--", then just set no_more_options and return. 1557 if (argv[i][1] == '-' && argv[i][2] == '\0') 1558 { 1559 *no_more_options = true; 1560 return i + 1; 1561 } 1562 1563 int new_i = i; 1564 options::One_option* option = NULL; 1565 const char* arg = NULL; 1566 1567 // First, try to process argv as a long option. 1568 option = parse_long_option(argc, argv, false, &arg, &new_i); 1569 if (option) 1570 { 1571 option->reader->parse_to_value(argv[i], arg, this, &this->options_); 1572 return new_i; 1573 } 1574 1575 // Now, try to process argv as a short option. Since several short 1576 // options can be combined in one argv, we may have to parse a lot 1577 // until we're done reading this argv. 1578 int pos_in_argv_i = 1; 1579 while (new_i == i) 1580 { 1581 option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i); 1582 if (!option) 1583 break; 1584 option->reader->parse_to_value(argv[i], arg, this, &this->options_); 1585 ++pos_in_argv_i; 1586 } 1587 if (option) 1588 return new_i; 1589 1590 // I guess it's neither a long option nor a short option. 1591 usage(_("unknown option"), argv[i]); 1592 return argc; 1593} 1594 1595 1596void 1597Command_line::process(int argc, const char** argv) 1598{ 1599 bool no_more_options = false; 1600 int i = 0; 1601 while (i < argc) 1602 { 1603 this->position_options_.copy_from_options(this->options()); 1604 if (no_more_options || argv[i][0] != '-') 1605 { 1606 Input_file_argument file(argv[i], 1607 Input_file_argument::INPUT_FILE_TYPE_FILE, 1608 "", false, this->position_options_); 1609 this->inputs_.add_file(file); 1610 ++i; 1611 } 1612 else 1613 i = process_one_option(argc, argv, i, &no_more_options); 1614 } 1615 1616 if (this->inputs_.in_group()) 1617 { 1618 fprintf(stderr, _("%s: missing group end\n"), program_name); 1619 usage(); 1620 } 1621 1622 if (this->inputs_.in_lib()) 1623 { 1624 fprintf(stderr, _("%s: missing lib end\n"), program_name); 1625 usage(); 1626 } 1627 1628 // Normalize the options and ensure they don't contradict each other. 1629 this->options_.finalize(); 1630} 1631 1632// Finalize the version script options and return them. 1633 1634const Version_script_info& 1635Command_line::version_script() 1636{ 1637 this->options_.finalize_dynamic_list(); 1638 Version_script_info* vsi = this->script_options_.version_script_info(); 1639 vsi->finalize(); 1640 return *vsi; 1641} 1642 1643} // End namespace gold. 1644