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