1 // options.h -- handle command line options for gold -*- C++ -*- 2 3 // Copyright (C) 2006-2024 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 // General_options (from Command_line::options()) 24 // All the options (a.k.a. command-line flags) 25 // Input_argument (from Command_line::inputs()) 26 // The list of input files, including -l options. 27 // Command_line 28 // Everything we get from the command line -- the General_options 29 // plus the Input_arguments. 30 // 31 // There are also some smaller classes, such as 32 // Position_dependent_options which hold a subset of General_options 33 // that change as options are parsed (as opposed to the usual behavior 34 // of the last instance of that option specified on the commandline wins). 35 36 #ifndef GOLD_OPTIONS_H 37 #define GOLD_OPTIONS_H 38 39 #include <cstdlib> 40 #include <cstring> 41 #include <list> 42 #include <map> 43 #include <string> 44 #include <vector> 45 46 #include "elfcpp.h" 47 #include "script.h" 48 49 namespace gold 50 { 51 52 class Command_line; 53 class General_options; 54 class Search_directory; 55 class Input_file_group; 56 class Input_file_lib; 57 class Position_dependent_options; 58 class Target; 59 class Plugin_manager; 60 class Script_info; 61 62 // Incremental build action for a specific file, as selected by the user. 63 64 enum Incremental_disposition 65 { 66 // Startup files that appear before the first disposition option. 67 // These will default to INCREMENTAL_CHECK unless the 68 // --incremental-startup-unchanged option is given. 69 // (For files added implicitly by gcc before any user options.) 70 INCREMENTAL_STARTUP, 71 // Determine the status from the timestamp (default). 72 INCREMENTAL_CHECK, 73 // Assume the file changed from the previous build. 74 INCREMENTAL_CHANGED, 75 // Assume the file didn't change from the previous build. 76 INCREMENTAL_UNCHANGED 77 }; 78 79 // The nested namespace is to contain all the global variables and 80 // structs that need to be defined in the .h file, but do not need to 81 // be used outside this class. 82 namespace options 83 { 84 typedef std::vector<Search_directory> Dir_list; 85 typedef Unordered_set<std::string> String_set; 86 87 // These routines convert from a string option to various types. 88 // Each gives a fatal error if it cannot parse the argument. 89 90 extern void 91 parse_bool(const char* option_name, const char* arg, bool* retval); 92 93 extern void 94 parse_int(const char* option_name, const char* arg, int* retval); 95 96 extern void 97 parse_uint(const char* option_name, const char* arg, int* retval); 98 99 extern void 100 parse_uint64(const char* option_name, const char* arg, uint64_t* retval); 101 102 extern void 103 parse_double(const char* option_name, const char* arg, double* retval); 104 105 extern void 106 parse_percent(const char* option_name, const char* arg, double* retval); 107 108 extern void 109 parse_string(const char* option_name, const char* arg, const char** retval); 110 111 extern void 112 parse_optional_string(const char* option_name, const char* arg, 113 const char** retval); 114 115 extern void 116 parse_dirlist(const char* option_name, const char* arg, Dir_list* retval); 117 118 extern void 119 parse_set(const char* option_name, const char* arg, String_set* retval); 120 121 extern void 122 parse_choices(const char* option_name, const char* arg, const char** retval, 123 const char* choices[], int num_choices); 124 125 struct Struct_var; 126 127 // Most options have both a shortname (one letter) and a longname. 128 // This enum controls how many dashes are expected for longname access 129 // -- shortnames always use one dash. Most longnames will accept 130 // either one dash or two; the only difference between ONE_DASH and 131 // TWO_DASHES is how we print the option in --help. However, some 132 // longnames require two dashes, and some require only one. The 133 // special value DASH_Z means that the option is preceded by "-z". 134 enum Dashes 135 { 136 ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z 137 }; 138 139 // LONGNAME is the long-name of the option with dashes converted to 140 // underscores, or else the short-name if the option has no long-name. 141 // It is never the empty string. 142 // DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc. 143 // SHORTNAME is the short-name of the option, as a char, or '\0' if the 144 // option has no short-name. If the option has no long-name, you 145 // should specify the short-name in *both* VARNAME and here. 146 // DEFAULT_VALUE is the value of the option if not specified on the 147 // commandline, as a string. 148 // HELPSTRING is the descriptive text used with the option via --help 149 // HELPARG is how you define the argument to the option. 150 // --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING" 151 // HELPARG should be NULL iff the option is a bool and takes no arg. 152 // OPTIONAL_ARG is true if this option takes an optional argument. An 153 // optional argument must be specifid as --OPTION=VALUE, not 154 // --OPTION VALUE. 155 // READER provides parse_to_value, which is a function that will convert 156 // a char* argument into the proper type and store it in some variable. 157 // IS_DEFAULT is true for boolean options that are on by default, 158 // and thus should have "(default)" printed with the helpstring. 159 // A One_option struct initializes itself with the global list of options 160 // at constructor time, so be careful making one of these. 161 struct One_option 162 { 163 std::string longname; 164 Dashes dashes; 165 char shortname; 166 const char* default_value; 167 const char* helpstring; 168 const char* helparg; 169 bool optional_arg; 170 Struct_var* reader; 171 bool is_default; 172 One_optionOne_option173 One_option(const char* ln, Dashes d, char sn, const char* dv, 174 const char* hs, const char* ha, bool oa, Struct_var* r, 175 bool id) 176 : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""), 177 helpstring(hs), helparg(ha), optional_arg(oa), reader(r), 178 is_default(id) 179 { 180 // In longname, we convert all underscores to dashes, since GNU 181 // style uses dashes in option names. longname is likely to have 182 // underscores in it because it's also used to declare a C++ 183 // function. 184 const char* pos = strchr(this->longname.c_str(), '_'); 185 for (; pos; pos = strchr(pos, '_')) 186 this->longname[pos - this->longname.c_str()] = '-'; 187 188 // We only register ourselves if our helpstring is not NULL. This 189 // is to support the "no-VAR" boolean variables, which we 190 // conditionally turn on by defining "no-VAR" help text. 191 if (this->helpstring) 192 this->register_option(); 193 } 194 195 // This option takes an argument iff helparg is not NULL. 196 bool takes_argumentOne_option197 takes_argument() const 198 { return this->helparg != NULL; } 199 200 // Whether the argument is optional. 201 bool takes_optional_argumentOne_option202 takes_optional_argument() const 203 { return this->optional_arg; } 204 205 // Register this option with the global list of options. 206 void 207 register_option(); 208 209 // Print this option to stdout (used with --help). 210 void 211 print() const; 212 }; 213 214 // All options have a Struct_##varname that inherits from this and 215 // actually implements parse_to_value for that option. 216 struct Struct_var 217 { 218 // OPTION: the name of the option as specified on the commandline, 219 // including leading dashes, and any text following the option: 220 // "-O", "--defsym=mysym=0x1000", etc. 221 // ARG: the arg associated with this option, or NULL if the option 222 // takes no argument: "2", "mysym=0x1000", etc. 223 // CMDLINE: the global Command_line object. Used by DEFINE_special. 224 // OPTIONS: the global General_options object. Used by DEFINE_special. 225 virtual void 226 parse_to_value(const char* option, const char* arg, 227 Command_line* cmdline, General_options* options) = 0; 228 virtual ~Struct_varStruct_var229 ~Struct_var() // To make gcc happy. 230 { } 231 }; 232 233 // This is for "special" options that aren't of any predefined type. 234 struct Struct_special : public Struct_var 235 { 236 // If you change this, change the parse-fn in DEFINE_special as well. 237 typedef void (General_options::*Parse_function)(const char*, const char*, 238 Command_line*); Struct_specialStruct_special239 Struct_special(const char* varname, Dashes dashes, char shortname, 240 Parse_function parse_function, 241 const char* helpstring, const char* helparg) 242 : option(varname, dashes, shortname, "", helpstring, helparg, false, this, 243 false), 244 parse(parse_function) 245 { } 246 parse_to_valueStruct_special247 void parse_to_value(const char* option, const char* arg, 248 Command_line* cmdline, General_options* options) 249 { (options->*(this->parse))(option, arg, cmdline); } 250 251 One_option option; 252 Parse_function parse; 253 }; 254 255 } // End namespace options. 256 257 258 // These are helper macros use by DEFINE_uint64/etc below. 259 // This macro is used inside the General_options_ class, so defines 260 // var() and set_var() as General_options methods. Arguments as are 261 // for the constructor for One_option. param_type__ is the same as 262 // type__ for built-in types, and "const type__ &" otherwise. 263 // 264 // When we define the linker command option "assert", the macro argument 265 // varname__ of DEFINE_var below will be replaced by "assert". On Mac OSX 266 // assert.h is included implicitly by one of the library headers we use. To 267 // avoid unintended macro substitution of "assert()", we need to enclose 268 // varname__ with parenthese. 269 #define DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 270 default_value_as_string__, helpstring__, helparg__, \ 271 optional_arg__, type__, param_type__, parse_fn__, \ 272 is_default__) \ 273 public: \ 274 param_type__ \ 275 (varname__)() const \ 276 { return this->varname__##_.value; } \ 277 \ 278 bool \ 279 user_set_##varname__() const \ 280 { return this->varname__##_.user_set_via_option; } \ 281 \ 282 void \ 283 set_user_set_##varname__() \ 284 { this->varname__##_.user_set_via_option = true; } \ 285 \ 286 static const bool varname__##is_default = is_default__; \ 287 \ 288 private: \ 289 struct Struct_##varname__ : public options::Struct_var \ 290 { \ 291 Struct_##varname__() \ 292 : option(#varname__, dashes__, shortname__, default_value_as_string__, \ 293 helpstring__, helparg__, optional_arg__, this, is_default__), \ 294 user_set_via_option(false), value(default_value__) \ 295 { } \ 296 \ 297 void \ 298 parse_to_value(const char* option_name, const char* arg, \ 299 Command_line*, General_options*) \ 300 { \ 301 parse_fn__(option_name, arg, &this->value); \ 302 this->user_set_via_option = true; \ 303 } \ 304 \ 305 options::One_option option; \ 306 bool user_set_via_option; \ 307 type__ value; \ 308 }; \ 309 Struct_##varname__ varname__##_; \ 310 void \ 311 set_##varname__(param_type__ value) \ 312 { this->varname__##_.value = value; } 313 314 // These macros allow for easy addition of a new commandline option. 315 316 // If no_helpstring__ is not NULL, then in addition to creating 317 // VARNAME, we also create an option called no-VARNAME (or, for a -z 318 // option, noVARNAME). 319 #define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \ 320 helpstring__, no_helpstring__) \ 321 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 322 default_value__ ? "true" : "false", helpstring__, NULL, \ 323 false, bool, bool, options::parse_bool, default_value__) \ 324 struct Struct_no_##varname__ : public options::Struct_var \ 325 { \ 326 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \ 327 ? "no" #varname__ \ 328 : "no-" #varname__), \ 329 dashes__, '\0', \ 330 default_value__ ? "false" : "true", \ 331 no_helpstring__, NULL, false, this, \ 332 !(default_value__)) \ 333 { } \ 334 \ 335 void \ 336 parse_to_value(const char*, const char*, \ 337 Command_line*, General_options* options) \ 338 { \ 339 options->set_##varname__(false); \ 340 options->set_user_set_##varname__(); \ 341 } \ 342 \ 343 options::One_option option; \ 344 }; \ 345 Struct_no_##varname__ no_##varname__##_initializer_ 346 347 #define DEFINE_bool_ignore(varname__, dashes__, shortname__, \ 348 helpstring__, no_helpstring__) \ 349 DEFINE_var(varname__, dashes__, shortname__, false, \ 350 "false", helpstring__, NULL, \ 351 false, bool, bool, options::parse_bool, false) \ 352 struct Struct_no_##varname__ : public options::Struct_var \ 353 { \ 354 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \ 355 ? "no" #varname__ \ 356 : "no-" #varname__), \ 357 dashes__, '\0', \ 358 "false", \ 359 no_helpstring__, NULL, false, this, \ 360 false) \ 361 { } \ 362 \ 363 void \ 364 parse_to_value(const char*, const char*, \ 365 Command_line*, General_options* options) \ 366 { \ 367 options->set_##varname__(false); \ 368 options->set_user_set_##varname__(); \ 369 } \ 370 \ 371 options::One_option option; \ 372 }; \ 373 Struct_no_##varname__ no_##varname__##_initializer_ 374 375 #define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \ 376 helpstring__, no_helpstring__) \ 377 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \ 378 default_value__ ? "true" : "false", helpstring__, NULL, \ 379 false, bool, bool, options::parse_bool, default_value__) \ 380 struct Struct_disable_##varname__ : public options::Struct_var \ 381 { \ 382 Struct_disable_##varname__() : option("disable-" #varname__, \ 383 dashes__, '\0', \ 384 default_value__ ? "false" : "true", \ 385 no_helpstring__, NULL, false, this, \ 386 !default_value__) \ 387 { } \ 388 \ 389 void \ 390 parse_to_value(const char*, const char*, \ 391 Command_line*, General_options* options) \ 392 { options->set_enable_##varname__(false); } \ 393 \ 394 options::One_option option; \ 395 }; \ 396 Struct_disable_##varname__ disable_##varname__##_initializer_ 397 398 #define DEFINE_int(varname__, dashes__, shortname__, default_value__, \ 399 helpstring__, helparg__) \ 400 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 401 #default_value__, helpstring__, helparg__, false, \ 402 int, int, options::parse_int, false) 403 404 #define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \ 405 helpstring__, helparg__) \ 406 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 407 #default_value__, helpstring__, helparg__, false, \ 408 int, int, options::parse_uint, false) 409 410 #define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \ 411 helpstring__, helparg__) \ 412 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 413 #default_value__, helpstring__, helparg__, false, \ 414 uint64_t, uint64_t, options::parse_uint64, false) 415 416 #define DEFINE_double(varname__, dashes__, shortname__, default_value__, \ 417 helpstring__, helparg__) \ 418 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 419 #default_value__, helpstring__, helparg__, false, \ 420 double, double, options::parse_double, false) 421 422 #define DEFINE_percent(varname__, dashes__, shortname__, default_value__, \ 423 helpstring__, helparg__) \ 424 DEFINE_var(varname__, dashes__, shortname__, default_value__ / 100.0, \ 425 #default_value__, helpstring__, helparg__, false, \ 426 double, double, options::parse_percent, false) 427 428 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \ 429 helpstring__, helparg__) \ 430 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 431 default_value__, helpstring__, helparg__, false, \ 432 const char*, const char*, options::parse_string, false) 433 434 // This is like DEFINE_string, but we convert each occurrence to a 435 // Search_directory and store it in a vector. Thus we also have the 436 // add_to_VARNAME() method, to append to the vector. 437 #define DEFINE_dirlist(varname__, dashes__, shortname__, \ 438 helpstring__, helparg__) \ 439 DEFINE_var(varname__, dashes__, shortname__, , \ 440 "", helpstring__, helparg__, false, options::Dir_list, \ 441 const options::Dir_list&, options::parse_dirlist, false) \ 442 void \ 443 add_to_##varname__(const char* new_value) \ 444 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \ 445 void \ 446 add_search_directory_to_##varname__(const Search_directory& dir) \ 447 { this->varname__##_.value.push_back(dir); } 448 449 // This is like DEFINE_string, but we store a set of strings. 450 #define DEFINE_set(varname__, dashes__, shortname__, \ 451 helpstring__, helparg__) \ 452 DEFINE_var(varname__, dashes__, shortname__, , \ 453 "", helpstring__, helparg__, false, options::String_set, \ 454 const options::String_set&, options::parse_set, false) \ 455 public: \ 456 bool \ 457 any_##varname__() const \ 458 { return !this->varname__##_.value.empty(); } \ 459 \ 460 bool \ 461 is_##varname__(const char* symbol) const \ 462 { \ 463 return (!this->varname__##_.value.empty() \ 464 && (this->varname__##_.value.find(std::string(symbol)) \ 465 != this->varname__##_.value.end())); \ 466 } \ 467 \ 468 options::String_set::const_iterator \ 469 varname__##_begin() const \ 470 { return this->varname__##_.value.begin(); } \ 471 \ 472 options::String_set::const_iterator \ 473 varname__##_end() const \ 474 { return this->varname__##_.value.end(); } \ 475 \ 476 options::String_set::size_type \ 477 varname__##_size() const \ 478 { return this->varname__##_.value.size(); } \ 479 480 // When you have a list of possible values (expressed as string) 481 // After helparg__ should come an initializer list, like 482 // {"foo", "bar", "baz"} 483 #define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \ 484 helpstring__, helparg__, optional_arg__, ...) \ 485 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 486 default_value__, helpstring__, helparg__, optional_arg__, \ 487 const char*, const char*, parse_choices_##varname__, false) \ 488 private: \ 489 static void parse_choices_##varname__(const char* option_name, \ 490 const char* arg, \ 491 const char** retval) { \ 492 const char* choices[] = __VA_ARGS__; \ 493 options::parse_choices(option_name, arg, retval, \ 494 choices, sizeof(choices) / sizeof(*choices)); \ 495 } 496 497 // This is like DEFINE_bool, but VARNAME is the name of a different 498 // option. This option becomes an alias for that one. INVERT is true 499 // if this option is an inversion of the other one. 500 #define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \ 501 helpstring__, no_helpstring__, invert__) \ 502 private: \ 503 struct Struct_##option__ : public options::Struct_var \ 504 { \ 505 Struct_##option__() \ 506 : option(#option__, dashes__, shortname__, "", helpstring__, \ 507 NULL, false, this, \ 508 General_options::varname__##is_default ^ invert__) \ 509 { } \ 510 \ 511 void \ 512 parse_to_value(const char*, const char*, \ 513 Command_line*, General_options* options) \ 514 { \ 515 options->set_##varname__(!invert__); \ 516 options->set_user_set_##varname__(); \ 517 } \ 518 \ 519 options::One_option option; \ 520 }; \ 521 Struct_##option__ option__##_; \ 522 \ 523 struct Struct_no_##option__ : public options::Struct_var \ 524 { \ 525 Struct_no_##option__() \ 526 : option((dashes__ == options::DASH_Z \ 527 ? "no" #option__ \ 528 : "no-" #option__), \ 529 dashes__, '\0', "", no_helpstring__, \ 530 NULL, false, this, \ 531 !General_options::varname__##is_default ^ invert__) \ 532 { } \ 533 \ 534 void \ 535 parse_to_value(const char*, const char*, \ 536 Command_line*, General_options* options) \ 537 { \ 538 options->set_##varname__(invert__); \ 539 options->set_user_set_##varname__(); \ 540 } \ 541 \ 542 options::One_option option; \ 543 }; \ 544 Struct_no_##option__ no_##option__##_initializer_ 545 546 // This is like DEFINE_uint64, but VARNAME is the name of a different 547 // option. This option becomes an alias for that one. 548 #define DEFINE_uint64_alias(option__, varname__, dashes__, shortname__, \ 549 helpstring__, helparg__) \ 550 private: \ 551 struct Struct_##option__ : public options::Struct_var \ 552 { \ 553 Struct_##option__() \ 554 : option(#option__, dashes__, shortname__, "", helpstring__, \ 555 helparg__, false, this, false) \ 556 { } \ 557 \ 558 void \ 559 parse_to_value(const char* option_name, const char* arg, \ 560 Command_line*, General_options* options) \ 561 { \ 562 uint64_t value; \ 563 options::parse_uint64(option_name, arg, &value); \ 564 options->set_##varname__(value); \ 565 options->set_user_set_##varname__(); \ 566 } \ 567 \ 568 options::One_option option; \ 569 }; \ 570 Struct_##option__ option__##_; 571 572 // This is used for non-standard flags. It defines no functions; it 573 // just calls General_options::parse_VARNAME whenever the flag is 574 // seen. We declare parse_VARNAME as a static member of 575 // General_options; you are responsible for defining it there. 576 // helparg__ should be NULL iff this special-option is a boolean. 577 #define DEFINE_special(varname__, dashes__, shortname__, \ 578 helpstring__, helparg__) \ 579 private: \ 580 void parse_##varname__(const char* option, const char* arg, \ 581 Command_line* inputs); \ 582 struct Struct_##varname__ : public options::Struct_special \ 583 { \ 584 Struct_##varname__() \ 585 : options::Struct_special(#varname__, dashes__, shortname__, \ 586 &General_options::parse_##varname__, \ 587 helpstring__, helparg__) \ 588 { } \ 589 }; \ 590 Struct_##varname__ varname__##_initializer_ 591 592 // An option that takes an optional string argument. If the option is 593 // used with no argument, the value will be the default, and 594 // user_set_via_option will be true. 595 #define DEFINE_optional_string(varname__, dashes__, shortname__, \ 596 default_value__, \ 597 helpstring__, helparg__) \ 598 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 599 default_value__, helpstring__, helparg__, true, \ 600 const char*, const char*, options::parse_optional_string, \ 601 false) 602 603 // A directory to search. For each directory we record whether it is 604 // in the sysroot. We need to know this so that, if a linker script 605 // is found within the sysroot, we will apply the sysroot to any files 606 // named by that script. 607 608 class Search_directory 609 { 610 public: 611 // We need a default constructor because we put this in a 612 // std::vector. Search_directory()613 Search_directory() 614 : name_(), put_in_sysroot_(false), is_in_sysroot_(false) 615 { } 616 617 // This is the usual constructor. Search_directory(const std::string & name,bool put_in_sysroot)618 Search_directory(const std::string& name, bool put_in_sysroot) 619 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false) 620 { 621 if (this->name_.empty()) 622 this->name_ = "."; 623 } 624 625 // This is called if we have a sysroot. The sysroot is prefixed to 626 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is 627 // set to true for any enries which are in the sysroot (this will 628 // naturally include any entries for which put_in_sysroot_ is true). 629 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of 630 // passing SYSROOT to lrealpath. 631 void 632 add_sysroot(const char* sysroot, const char* canonical_sysroot); 633 634 // Get the directory name. 635 const std::string& name()636 name() const 637 { return this->name_; } 638 639 // Return whether this directory is in the sysroot. 640 bool is_in_sysroot()641 is_in_sysroot() const 642 { return this->is_in_sysroot_; } 643 644 // Return whether this is considered a system directory. 645 bool is_system_directory()646 is_system_directory() const 647 { return this->put_in_sysroot_ || this->is_in_sysroot_; } 648 649 private: 650 // The directory name. 651 std::string name_; 652 // True if the sysroot should be added as a prefix for this 653 // directory (if there is a sysroot). This is true for system 654 // directories that we search by default. 655 bool put_in_sysroot_; 656 // True if this directory is in the sysroot (if there is a sysroot). 657 // This is true if there is a sysroot and either 1) put_in_sysroot_ 658 // is true, or 2) the directory happens to be in the sysroot based 659 // on a pathname comparison. 660 bool is_in_sysroot_; 661 }; 662 663 class General_options 664 { 665 private: 666 // NOTE: For every option that you add here, also consider if you 667 // should add it to Position_dependent_options. 668 DEFINE_special(help, options::TWO_DASHES, '\0', 669 N_("Report usage information"), NULL); 670 DEFINE_special(version, options::TWO_DASHES, 'v', 671 N_("Report version information"), NULL); 672 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0', 673 N_("Report version and target information"), NULL); 674 675 // These options are sorted approximately so that for each letter in 676 // the alphabet, we show the option whose shortname is that letter 677 // (if any) and then every longname that starts with that letter (in 678 // alphabetical order). For both, lowercase sorts before uppercase. 679 // The -z options come last. 680 681 // a 682 683 DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false, 684 N_("Not supported"), 685 N_("Do not copy DT_NEEDED tags from shared libraries")); 686 687 DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES, 688 '\0', 689 N_("Allow multiple definitions of symbols"), 690 N_("Do not allow multiple definitions"), false); 691 692 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false, 693 N_("Allow unresolved references in shared libraries"), 694 N_("Do not allow unresolved references in shared libraries")); 695 696 DEFINE_bool(apply_dynamic_relocs, options::TWO_DASHES, '\0', true, 697 N_("Apply link-time values for dynamic relocations"), 698 N_("(aarch64 only) Do not apply link-time values " 699 "for dynamic relocations")); 700 701 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false, 702 N_("Use DT_NEEDED only for shared libraries that are used"), 703 N_("Use DT_NEEDED for all shared libraries")); 704 705 DEFINE_enum(assert, options::ONE_DASH, '\0', NULL, 706 N_("Ignored"), N_("[ignored]"), false, 707 {"definitions", "nodefinitions", "nosymbolic", "pure-text"}); 708 709 // b 710 711 // This should really be an "enum", but it's too easy for folks to 712 // forget to update the list as they add new targets. So we just 713 // accept any string. We'll fail later (when the string is parsed), 714 // if the target isn't actually supported. 715 DEFINE_string(format, options::TWO_DASHES, 'b', "elf", 716 N_("Set input format"), ("[elf,binary]")); 717 718 DEFINE_bool(be8, options::TWO_DASHES, '\0', false, 719 N_("Output BE8 format image"), NULL); 720 721 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "tree", 722 N_("Generate build ID note"), 723 N_("[=STYLE]")); 724 725 DEFINE_uint64(build_id_chunk_size_for_treehash, 726 options::TWO_DASHES, '\0', 2 << 20, 727 N_("Chunk size for '--build-id=tree'"), N_("SIZE")); 728 729 DEFINE_uint64(build_id_min_file_size_for_treehash, options::TWO_DASHES, 730 '\0', 40 << 20, 731 N_("Minimum output file size for '--build-id=tree' to work" 732 " differently than '--build-id=sha1'"), N_("SIZE")); 733 734 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true, 735 N_("-l searches for shared libraries"), NULL); 736 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0', 737 N_("-l does not search for shared libraries"), NULL, 738 true); 739 DEFINE_bool_alias(dy, Bdynamic, options::ONE_DASH, '\0', 740 N_("alias for -Bdynamic"), NULL, false); 741 DEFINE_bool_alias(dn, Bdynamic, options::ONE_DASH, '\0', 742 N_("alias for -Bstatic"), NULL, true); 743 744 DEFINE_bool(Bgroup, options::ONE_DASH, '\0', false, 745 N_("Use group name lookup rules for shared library"), NULL); 746 747 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false, 748 N_("Generate shared library (alias for -G/-shared)"), NULL); 749 750 DEFINE_special (Bno_symbolic, options::ONE_DASH, '\0', 751 N_ ("Don't bind default visibility defined symbols locally " 752 "for -shared (default)"), 753 NULL); 754 755 DEFINE_special (Bsymbolic_functions, options::ONE_DASH, '\0', 756 N_ ("Bind default visibility defined function symbols " 757 "locally for -shared"), 758 NULL); 759 760 DEFINE_special ( 761 Bsymbolic, options::ONE_DASH, '\0', 762 N_ ("Bind default visibility defined symbols locally for -shared"), 763 NULL); 764 765 // c 766 767 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true, 768 N_("Check segment addresses for overlaps"), 769 N_("Do not check segment addresses for overlaps")); 770 771 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", 772 N_("Compress .debug_* sections in the output file"), 773 ("[none,zlib,zlib-gnu,zlib-gabi,zstd]"), false, 774 {"none", "zlib", "zlib-gnu", "zlib-gabi", "zstd"}); 775 776 DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false, 777 N_("Not supported"), 778 N_("Do not copy DT_NEEDED tags from shared libraries")); 779 780 DEFINE_bool(cref, options::TWO_DASHES, '\0', false, 781 N_("Output cross reference table"), 782 N_("Do not output cross reference table")); 783 784 DEFINE_bool(ctors_in_init_array, options::TWO_DASHES, '\0', true, 785 N_("Use DT_INIT_ARRAY for all constructors"), 786 N_("Handle constructors as directed by compiler")); 787 788 // d 789 790 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false, 791 N_("Define common symbols"), 792 N_("Do not define common symbols in relocatable output")); 793 DEFINE_bool(dc, options::ONE_DASH, '\0', false, 794 N_("Alias for -d"), NULL); 795 DEFINE_bool(dp, options::ONE_DASH, '\0', false, 796 N_("Alias for -d"), NULL); 797 798 DEFINE_string(debug, options::TWO_DASHES, '\0', "", 799 N_("Turn on debugging"), 800 N_("[all,files,script,task][,...]")); 801 802 DEFINE_special(defsym, options::TWO_DASHES, '\0', 803 N_("Define a symbol"), N_("SYMBOL=EXPRESSION")); 804 805 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL, 806 N_("Demangle C++ symbols in log messages"), 807 N_("[=STYLE]")); 808 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false, 809 N_("Do not demangle C++ symbols in log messages"), 810 NULL); 811 812 DEFINE_string(dependency_file, options::TWO_DASHES, '\0', NULL, 813 N_("Write a dependency file listing all files read"), 814 N_("FILE")); 815 816 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false, 817 N_("Look for violations of the C++ One Definition Rule"), 818 N_("Do not look for violations of the C++ One Definition Rule")); 819 820 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false, 821 N_("Add data symbols to dynamic symbols"), NULL); 822 823 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false, 824 N_("Add C++ operator new/delete to dynamic symbols"), NULL); 825 826 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false, 827 N_("Add C++ typeinfo to dynamic symbols"), NULL); 828 829 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0', 830 N_("Read a list of dynamic symbols"), N_("FILE")); 831 832 // e 833 834 DEFINE_bool(emit_stub_syms, options::TWO_DASHES, '\0', true, 835 N_("(PowerPC only) Label linker stubs with a symbol"), 836 N_("(PowerPC only) Do not label linker stubs with a symbol")); 837 838 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL, 839 N_("Set program start address"), N_("ADDRESS")); 840 841 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false, 842 N_("Create exception frame header"), 843 N_("Do not create exception frame header")); 844 845 // Alphabetized under 'e' because the option is spelled --enable-new-dtags. 846 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', true, 847 N_("Enable use of DT_RUNPATH"), 848 N_("Disable use of DT_RUNPATH")); 849 850 DEFINE_enable(linker_version, options::EXACTLY_TWO_DASHES, '\0', false, 851 N_("Put the linker version string into the .comment section"), 852 N_("Put the linker version string into the .note.gnu.gold-version section")); 853 854 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL, 855 N_("(ARM only) Do not warn about objects with incompatible " 856 "enum sizes")); 857 858 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0', 859 N_("Exclude libraries from automatic export"), 860 N_(("lib,lib ..."))); 861 862 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false, 863 N_("Export all dynamic symbols"), 864 N_("Do not export all dynamic symbols")); 865 866 DEFINE_set(export_dynamic_symbol, options::TWO_DASHES, '\0', 867 N_("Export SYMBOL to dynamic symbol table"), N_("SYMBOL")); 868 869 DEFINE_special(EB, options::ONE_DASH, '\0', 870 N_("Link big-endian objects."), NULL); 871 DEFINE_special(EL, options::ONE_DASH, '\0', 872 N_("Link little-endian objects."), NULL); 873 874 // f 875 876 DEFINE_set(auxiliary, options::TWO_DASHES, 'f', 877 N_("Auxiliary filter for shared object symbol table"), 878 N_("SHLIB")); 879 880 DEFINE_string(filter, options::TWO_DASHES, 'F', NULL, 881 N_("Filter for shared object symbol table"), 882 N_("SHLIB")); 883 884 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false, 885 N_("Treat warnings as errors"), 886 N_("Do not treat warnings as errors")); 887 888 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini", 889 N_("Call SYMBOL at unload-time"), N_("SYMBOL")); 890 891 DEFINE_bool(fix_arm1176, options::TWO_DASHES, '\0', true, 892 N_("(ARM only) Fix binaries for ARM1176 erratum"), 893 N_("(ARM only) Do not fix binaries for ARM1176 erratum")); 894 895 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false, 896 N_("(ARM only) Fix binaries for Cortex-A8 erratum"), 897 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum")); 898 899 DEFINE_bool(fix_cortex_a53_843419, options::TWO_DASHES, '\0', false, 900 N_("(AArch64 only) Fix Cortex-A53 erratum 843419"), 901 N_("(AArch64 only) Do not fix Cortex-A53 erratum 843419")); 902 903 DEFINE_bool(fix_cortex_a53_835769, options::TWO_DASHES, '\0', false, 904 N_("(AArch64 only) Fix Cortex-A53 erratum 835769"), 905 N_("(AArch64 only) Do not fix Cortex-A53 erratum 835769")); 906 907 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0', 908 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"), 909 NULL); 910 911 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0', 912 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking " 913 "veneer"), 914 NULL); 915 916 DEFINE_string(fuse_ld, options::ONE_DASH, '\0', "", 917 N_("Ignored for GCC linker option compatibility"), 918 N_("[gold,bfd]")); 919 920 // g 921 922 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false, 923 N_("Ignored"), NULL); 924 925 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false, 926 N_("Remove unused sections"), 927 N_("Don't remove unused sections")); 928 929 DEFINE_bool(gdb_index, options::TWO_DASHES, '\0', false, 930 N_("Generate .gdb_index section"), 931 N_("Do not generate .gdb_index section")); 932 933 DEFINE_bool(gnu_unique, options::TWO_DASHES, '\0', true, 934 N_("Enable STB_GNU_UNIQUE symbol binding"), 935 N_("Disable STB_GNU_UNIQUE symbol binding")); 936 937 DEFINE_bool(shared, options::ONE_DASH, 'G', false, 938 N_("Generate shared library"), NULL); 939 940 // h 941 942 DEFINE_string(soname, options::ONE_DASH, 'h', NULL, 943 N_("Set shared library name"), N_("FILENAME")); 944 945 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0, 946 N_("Min fraction of empty buckets in dynamic hash"), 947 N_("FRACTION")); 948 949 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', DEFAULT_HASH_STYLE, 950 N_("Dynamic hash style"), N_("[sysv,gnu,both]"), false, 951 {"sysv", "gnu", "both"}); 952 953 // i 954 955 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0', 956 N_("Alias for -r"), NULL, false); 957 958 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none", 959 N_("Identical Code Folding. " 960 "\'--icf=safe\' Folds ctors, dtors and functions whose" 961 " pointers are definitely not taken"), 962 ("[none,all,safe]"), false, 963 {"none", "all", "safe"}); 964 965 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0, 966 N_("Number of iterations of ICF (default 3)"), N_("COUNT")); 967 968 DEFINE_special(incremental, options::TWO_DASHES, '\0', 969 N_("Do an incremental link if possible; " 970 "otherwise, do a full link and prepare output " 971 "for incremental linking"), NULL); 972 973 DEFINE_special(no_incremental, options::TWO_DASHES, '\0', 974 N_("Do a full link (default)"), NULL); 975 976 DEFINE_special(incremental_full, options::TWO_DASHES, '\0', 977 N_("Do a full link and " 978 "prepare output for incremental linking"), NULL); 979 980 DEFINE_special(incremental_update, options::TWO_DASHES, '\0', 981 N_("Do an incremental link; exit if not possible"), NULL); 982 983 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL, 984 N_("Set base file for incremental linking" 985 " (default is output file)"), 986 N_("FILE")); 987 988 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0', 989 N_("Assume files changed"), NULL); 990 991 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0', 992 N_("Assume files didn't change"), NULL); 993 994 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0', 995 N_("Use timestamps to check files (default)"), NULL); 996 997 DEFINE_special(incremental_startup_unchanged, options::TWO_DASHES, '\0', 998 N_("Assume startup files unchanged " 999 "(files preceding this option)"), NULL); 1000 1001 DEFINE_percent(incremental_patch, options::TWO_DASHES, '\0', 10, 1002 N_("Amount of extra space to allocate for patches " 1003 "(default 10)"), 1004 N_("PERCENT")); 1005 1006 DEFINE_string(init, options::ONE_DASH, '\0', "_init", 1007 N_("Call SYMBOL at load-time"), N_("SYMBOL")); 1008 1009 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL, 1010 N_("Set dynamic linker path"), N_("PROGRAM")); 1011 1012 // j 1013 1014 DEFINE_special(just_symbols, options::TWO_DASHES, '\0', 1015 N_("Read only symbol values from FILE"), N_("FILE")); 1016 1017 // k 1018 1019 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true, 1020 N_("Keep files mapped across passes"), 1021 N_("Release mapped files after each pass")); 1022 1023 DEFINE_set(keep_unique, options::TWO_DASHES, '\0', 1024 N_("Do not fold this symbol during ICF"), N_("SYMBOL")); 1025 1026 // l 1027 1028 DEFINE_special(library, options::TWO_DASHES, 'l', 1029 N_("Search for library LIBNAME"), N_("LIBNAME")); 1030 1031 DEFINE_bool(ld_generated_unwind_info, options::TWO_DASHES, '\0', true, 1032 N_("Generate unwind information for PLT"), 1033 N_("Do not generate unwind information for PLT")); 1034 1035 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L', 1036 N_("Add directory to search path"), N_("DIR")); 1037 1038 DEFINE_bool(long_plt, options::TWO_DASHES, '\0', false, 1039 N_("(ARM only) Generate long PLT entries"), 1040 N_("(ARM only) Do not generate long PLT entries")); 1041 1042 // m 1043 1044 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "", 1045 N_("Set GNU linker emulation; obsolete"), N_("EMULATION")); 1046 1047 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0', 1048 sizeof(void*) >= 8, 1049 N_("Map whole files to memory"), 1050 N_("Map relevant file parts to memory")); 1051 1052 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true, 1053 N_("(ARM only) Merge exidx entries in debuginfo"), 1054 N_("(ARM only) Do not merge exidx entries in debuginfo")); 1055 1056 DEFINE_bool(mmap_output_file, options::TWO_DASHES, '\0', true, 1057 N_("Map the output file for writing"), 1058 N_("Do not map the output file for writing")); 1059 1060 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false, 1061 N_("Write map file on standard output"), NULL); 1062 1063 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"), 1064 N_("MAPFILENAME")); 1065 1066 // n 1067 1068 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false, 1069 N_("Do not page align data"), NULL); 1070 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false, 1071 N_("Do not page align data, do not make text readonly"), 1072 N_("Page align data, make text readonly")); 1073 1074 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false, 1075 N_("Use less memory and more disk I/O " 1076 "(included only for compatibility with GNU ld)"), NULL); 1077 1078 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0', 1079 N_("Report undefined symbols (even with --shared)"), 1080 NULL, false); 1081 1082 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false, 1083 N_("Create an output file even if errors occur"), NULL); 1084 1085 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false, 1086 N_("Only search directories specified on the command line"), 1087 NULL); 1088 1089 // o 1090 1091 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out", 1092 N_("Set output file name"), N_("FILE")); 1093 1094 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf", 1095 N_("Set output format"), N_("[binary]")); 1096 1097 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0, 1098 N_("Optimize output file size"), N_("LEVEL")); 1099 1100 DEFINE_enum(orphan_handling, options::TWO_DASHES, '\0', "place", 1101 N_("Orphan section handling"), N_("[place,discard,warn,error]"), 1102 false, {"place", "discard", "warn", "error"}); 1103 1104 // p 1105 1106 DEFINE_bool(p, options::ONE_DASH, 'p', false, 1107 N_("Ignored for ARM compatibility"), NULL); 1108 1109 DEFINE_optional_string(package_metadata, options::TWO_DASHES, '\0', NULL, 1110 N_("Generate package metadata note"), 1111 N_("[=JSON]")); 1112 1113 DEFINE_bool(pie, options::ONE_DASH, '\0', false, 1114 N_("Create a position independent executable"), 1115 N_("Do not create a position independent executable")); 1116 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0', 1117 N_("Create a position independent executable"), 1118 N_("Do not create a position independent executable"), 1119 false); 1120 1121 DEFINE_bool(pic_veneer, options::TWO_DASHES, '\0', false, 1122 N_("Force PIC sequences for ARM/Thumb interworking veneers"), 1123 NULL); 1124 1125 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false, 1126 NULL, N_("(ARM only) Ignore for backward compatibility")); 1127 1128 DEFINE_var(plt_align, options::TWO_DASHES, '\0', 0, "5", 1129 N_("(PowerPC only) Align PLT call stubs to fit cache lines"), 1130 N_("[=P2ALIGN]"), true, int, int, options::parse_uint, false); 1131 1132 DEFINE_bool(plt_localentry, options::TWO_DASHES, '\0', false, 1133 N_("(PowerPC64 only) Optimize calls to ELFv2 localentry:0 functions"), 1134 N_("(PowerPC64 only) Don't optimize ELFv2 calls")); 1135 1136 DEFINE_bool(plt_static_chain, options::TWO_DASHES, '\0', false, 1137 N_("(PowerPC64 only) PLT call stubs should load r11"), 1138 N_("(PowerPC64 only) PLT call stubs should not load r11")); 1139 1140 DEFINE_bool(plt_thread_safe, options::TWO_DASHES, '\0', false, 1141 N_("(PowerPC64 only) PLT call stubs with load-load barrier"), 1142 N_("(PowerPC64 only) PLT call stubs without barrier")); 1143 1144 #ifdef ENABLE_PLUGINS 1145 DEFINE_special(plugin, options::TWO_DASHES, '\0', 1146 N_("Load a plugin library"), N_("PLUGIN")); 1147 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0', 1148 N_("Pass an option to the plugin"), N_("OPTION")); 1149 #else 1150 DEFINE_special(plugin, options::TWO_DASHES, '\0', 1151 N_("Load a plugin library (not supported)"), N_("PLUGIN")); 1152 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0', 1153 N_("Pass an option to the plugin (not supported)"), 1154 N_("OPTION")); 1155 #endif 1156 1157 DEFINE_bool(posix_fallocate, options::TWO_DASHES, '\0', true, 1158 N_("Use posix_fallocate to reserve space in the output file"), 1159 N_("Use fallocate or ftruncate to reserve space")); 1160 1161 DEFINE_enum(power10_stubs, options::TWO_DASHES, '\0', "yes", 1162 N_("(PowerPC64 only) stubs use power10 insns"), 1163 N_("[=auto,no,yes]"), true, {"auto", "no", "yes"}); 1164 DEFINE_special(no_power10_stubs, options::TWO_DASHES, '\0', 1165 N_("(PowerPC64 only) stubs do not use power10 insns"), NULL); 1166 1167 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false, 1168 N_("Preread archive symbols when multi-threaded"), NULL); 1169 1170 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false, 1171 N_("List removed unused sections on stderr"), 1172 N_("Do not list removed unused sections")); 1173 1174 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false, 1175 N_("List folded identical sections on stderr"), 1176 N_("Do not list folded identical sections")); 1177 1178 DEFINE_bool(print_output_format, options::TWO_DASHES, '\0', false, 1179 N_("Print default output format"), NULL); 1180 1181 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL, 1182 N_("Print symbols defined and used for each input"), 1183 N_("FILENAME")); 1184 1185 DEFINE_special(push_state, options::TWO_DASHES, '\0', 1186 N_("Save the state of flags related to input files"), NULL); 1187 DEFINE_special(pop_state, options::TWO_DASHES, '\0', 1188 N_("Restore the state of flags related to input files"), NULL); 1189 1190 // q 1191 1192 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false, 1193 N_("Generate relocations in output"), NULL); 1194 1195 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false, 1196 N_("Ignored for SVR4 compatibility"), NULL); 1197 1198 // r 1199 1200 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false, 1201 N_("Generate relocatable output"), NULL); 1202 1203 DEFINE_bool(relax, options::TWO_DASHES, '\0', false, 1204 N_("Relax branches on certain targets"), 1205 N_("Do not relax branches")); 1206 1207 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL, 1208 N_("keep only symbols listed in this file"), N_("FILE")); 1209 1210 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false, 1211 N_("Put read-only non-executable sections in their own segment"), 1212 N_("Do not put read-only non-executable sections in their own segment")); 1213 1214 DEFINE_uint64(rosegment_gap, options::TWO_DASHES, '\0', -1U, 1215 N_("Set offset between executable and read-only segments"), 1216 N_("OFFSET")); 1217 1218 // -R really means -rpath, but can mean --just-symbols for 1219 // compatibility with GNU ld. -rpath is always -rpath, so we list 1220 // it separately. 1221 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R', 1222 N_("Add DIR to runtime search path"), N_("DIR")); 1223 1224 DEFINE_dirlist(rpath, options::ONE_DASH, '\0', 1225 N_("Add DIR to runtime search path"), N_("DIR")); 1226 1227 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0', 1228 N_("Add DIR to link time shared library search path"), 1229 N_("DIR")); 1230 1231 // s 1232 1233 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false, 1234 N_("Strip all symbols"), NULL); 1235 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false, 1236 N_("Strip debugging information"), NULL); 1237 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false, 1238 N_("Emit only debug line number information"), NULL); 1239 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false, 1240 N_("Strip debug symbols that are unused by gdb " 1241 "(at least versions <= 7.4)"), NULL); 1242 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true, 1243 N_("Strip LTO intermediate code sections"), NULL); 1244 1245 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL, 1246 N_("Layout sections in the order specified"), 1247 N_("FILENAME")); 1248 1249 DEFINE_special(section_start, options::TWO_DASHES, '\0', 1250 N_("Set address of section"), N_("SECTION=ADDRESS")); 1251 1252 DEFINE_bool(secure_plt, options::TWO_DASHES , '\0', true, 1253 N_("(PowerPC only) Use new-style PLT"), NULL); 1254 1255 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL, 1256 N_("Sort common symbols by alignment"), 1257 N_("[={ascending,descending}]")); 1258 1259 DEFINE_enum(sort_section, options::TWO_DASHES, '\0', "none", 1260 N_("Sort sections by name. \'--no-text-reorder\'" 1261 " will override \'--sort-section=name\' for .text"), 1262 N_("[none,name]"), false, 1263 {"none", "name"}); 1264 1265 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5, 1266 N_("Dynamic tag slots to reserve (default 5)"), 1267 N_("COUNT")); 1268 1269 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1, 1270 N_("(ARM, PowerPC only) The maximum distance from instructions " 1271 "in a group of sections to their stubs. Negative values mean " 1272 "stubs are always after the group. 1 means use default size"), 1273 N_("SIZE")); 1274 1275 DEFINE_bool(stub_group_multi, options::TWO_DASHES, '\0', true, 1276 N_("(PowerPC only) Allow a group of stubs to serve multiple " 1277 "output sections"), 1278 N_("(PowerPC only) Each output section has its own stubs")); 1279 1280 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x100000, 1281 N_("Stack size when -fsplit-stack function calls non-split"), 1282 N_("SIZE")); 1283 1284 // This is not actually special in any way, but I need to give it 1285 // a non-standard accessor-function name because 'static' is a keyword. 1286 DEFINE_special(static, options::ONE_DASH, '\0', 1287 N_("Do not link against shared libraries"), NULL); 1288 1289 DEFINE_special(start_lib, options::TWO_DASHES, '\0', 1290 N_("Start a library"), NULL); 1291 DEFINE_special(end_lib, options::TWO_DASHES, '\0', 1292 N_("End a library "), NULL); 1293 1294 DEFINE_bool(stats, options::TWO_DASHES, '\0', false, 1295 N_("Print resource usage statistics"), NULL); 1296 1297 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "", 1298 N_("Set target system root directory"), N_("DIR")); 1299 1300 // t 1301 1302 DEFINE_bool(trace, options::TWO_DASHES, 't', false, 1303 N_("Print the name of each input file"), NULL); 1304 1305 DEFINE_bool(target1_abs, options::TWO_DASHES, '\0', false, 1306 N_("(ARM only) Force R_ARM_TARGET1 type to R_ARM_ABS32"), 1307 NULL); 1308 DEFINE_bool(target1_rel, options::TWO_DASHES, '\0', false, 1309 N_("(ARM only) Force R_ARM_TARGET1 type to R_ARM_REL32"), 1310 NULL); 1311 DEFINE_enum(target2, options::TWO_DASHES, '\0', NULL, 1312 N_("(ARM only) Set R_ARM_TARGET2 relocation type"), 1313 N_("[rel, abs, got-rel"), false, 1314 {"rel", "abs", "got-rel"}); 1315 1316 DEFINE_bool(text_reorder, options::TWO_DASHES, '\0', true, 1317 N_("Enable text section reordering for GCC section names"), 1318 N_("Disable text section reordering for GCC section names")); 1319 1320 DEFINE_bool(threads, options::TWO_DASHES, '\0', false, 1321 N_("Run the linker multi-threaded"), 1322 N_("Do not run the linker multi-threaded")); 1323 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0, 1324 N_("Number of threads to use"), N_("COUNT")); 1325 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0, 1326 N_("Number of threads to use in initial pass"), N_("COUNT")); 1327 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0, 1328 N_("Number of threads to use in middle pass"), N_("COUNT")); 1329 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0, 1330 N_("Number of threads to use in final pass"), N_("COUNT")); 1331 1332 DEFINE_bool(tls_optimize, options::TWO_DASHES, '\0', true, 1333 N_("(PowerPC/64 only) Optimize GD/LD/IE code to IE/LE"), 1334 N_("(PowerPC/64 only) Don'\''t try to optimize TLS accesses")); 1335 DEFINE_bool(tls_get_addr_optimize, options::TWO_DASHES, '\0', true, 1336 N_("(PowerPC/64 only) Use a special __tls_get_addr call"), 1337 N_("(PowerPC/64 only) Don't use a special __tls_get_addr call")); 1338 1339 DEFINE_bool(toc_optimize, options::TWO_DASHES, '\0', true, 1340 N_("(PowerPC64 only) Optimize TOC code sequences"), 1341 N_("(PowerPC64 only) Don't optimize TOC code sequences")); 1342 1343 DEFINE_bool(toc_sort, options::TWO_DASHES, '\0', true, 1344 N_("(PowerPC64 only) Sort TOC and GOT sections"), 1345 N_("(PowerPC64 only) Don't sort TOC and GOT sections")); 1346 1347 DEFINE_special(script, options::TWO_DASHES, 'T', 1348 N_("Read linker script"), N_("FILE")); 1349 1350 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U, 1351 N_("Set the address of the bss segment"), N_("ADDRESS")); 1352 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U, 1353 N_("Set the address of the data segment"), N_("ADDRESS")); 1354 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U, 1355 N_("Set the address of the text segment"), N_("ADDRESS")); 1356 DEFINE_uint64_alias(Ttext_segment, Ttext, options::ONE_DASH, '\0', 1357 N_("Set the address of the text segment"), 1358 N_("ADDRESS")); 1359 DEFINE_uint64(Trodata_segment, options::ONE_DASH, '\0', -1U, 1360 N_("Set the address of the rodata segment"), N_("ADDRESS")); 1361 1362 // u 1363 1364 DEFINE_set(undefined, options::TWO_DASHES, 'u', 1365 N_("Create undefined reference to SYMBOL"), N_("SYMBOL")); 1366 1367 DEFINE_enum(unresolved_symbols, options::TWO_DASHES, '\0', NULL, 1368 N_("How to handle unresolved symbols"), 1369 ("ignore-all,report-all,ignore-in-object-files," 1370 "ignore-in-shared-libs"), false, 1371 {"ignore-all", "report-all", "ignore-in-object-files", 1372 "ignore-in-shared-libs"}); 1373 1374 // v 1375 1376 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false, 1377 N_("Alias for --debug=files"), NULL); 1378 1379 DEFINE_special(version_script, options::TWO_DASHES, '\0', 1380 N_("Read version script"), N_("FILE")); 1381 1382 // w 1383 1384 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false, 1385 N_("Warn about duplicate common symbols"), 1386 N_("Do not warn about duplicate common symbols")); 1387 1388 DEFINE_bool_ignore(warn_constructors, options::TWO_DASHES, '\0', 1389 N_("Ignored"), N_("Ignored")); 1390 1391 DEFINE_bool(warn_drop_version, options::TWO_DASHES, '\0', false, 1392 N_("Warn when discarding version information"), 1393 N_("Do not warn when discarding version information")); 1394 1395 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false, 1396 N_("Warn if the stack is executable"), 1397 N_("Do not warn if the stack is executable")); 1398 1399 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true, 1400 NULL, N_("Don't warn about mismatched input files")); 1401 1402 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false, 1403 N_("Ignored"), NULL); 1404 1405 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true, 1406 N_("Warn when skipping an incompatible library"), 1407 N_("Don't warn when skipping an incompatible library")); 1408 1409 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false, 1410 N_("Warn if text segment is not shareable"), 1411 N_("Do not warn if text segment is not shareable")); 1412 1413 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false, 1414 N_("Report unresolved symbols as warnings"), 1415 NULL); 1416 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols, 1417 options::TWO_DASHES, '\0', 1418 N_("Report unresolved symbols as errors"), 1419 NULL, true); 1420 1421 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL, 1422 N_("(ARM only) Do not warn about objects with incompatible " 1423 "wchar_t sizes")); 1424 1425 DEFINE_bool(weak_unresolved_symbols, options::TWO_DASHES, '\0', false, 1426 N_("Convert unresolved symbols to weak references"), 1427 NULL); 1428 1429 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false, 1430 N_("Include all archive contents"), 1431 N_("Include only needed archive contents")); 1432 1433 DEFINE_set(wrap, options::TWO_DASHES, '\0', 1434 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL")); 1435 1436 // x 1437 1438 DEFINE_special(discard_all, options::TWO_DASHES, 'x', 1439 N_("Delete all local symbols"), NULL); 1440 DEFINE_special(discard_locals, options::TWO_DASHES, 'X', 1441 N_("Delete all temporary local symbols"), NULL); 1442 DEFINE_special(discard_none, options::TWO_DASHES, '\0', 1443 N_("Keep all local symbols"), NULL); 1444 1445 // y 1446 1447 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y', 1448 N_("Trace references to symbol"), N_("SYMBOL")); 1449 1450 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true, 1451 N_("Allow unused version in script"), 1452 N_("Do not allow unused version in script")); 1453 1454 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "", 1455 N_("Default search path for Solaris compatibility"), 1456 N_("PATH")); 1457 1458 // special characters 1459 1460 DEFINE_special(start_group, options::TWO_DASHES, '(', 1461 N_("Start a library search group"), NULL); 1462 DEFINE_special(end_group, options::TWO_DASHES, ')', 1463 N_("End a library search group"), NULL); 1464 1465 // The -z options. 1466 1467 DEFINE_bool(combreloc, options::DASH_Z, '\0', true, 1468 N_("Sort dynamic relocs"), 1469 N_("Do not sort dynamic relocs")); 1470 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0, 1471 N_("Set common page size to SIZE"), N_("SIZE")); 1472 DEFINE_bool(defs, options::DASH_Z, '\0', false, 1473 N_("Report undefined symbols (even with --shared)"), 1474 NULL); 1475 DEFINE_bool(execstack, options::DASH_Z, '\0', false, 1476 N_("Mark output as requiring executable stack"), NULL); 1477 DEFINE_bool(global, options::DASH_Z, '\0', false, 1478 N_("Make symbols in DSO available for subsequently loaded " 1479 "objects"), NULL); 1480 DEFINE_bool(initfirst, options::DASH_Z, '\0', false, 1481 N_("Mark DSO to be initialized first at runtime"), 1482 NULL); 1483 DEFINE_bool(interpose, options::DASH_Z, '\0', false, 1484 N_("Mark object to interpose all DSOs but executable"), 1485 NULL); 1486 DEFINE_bool(unique, options::DASH_Z, '\0', false, 1487 N_("Mark DSO to be loaded at most once, and only in the main namespace"), 1488 N_("Do not mark the DSO as one to be loaded only in the main namespace")); 1489 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0', 1490 N_("Mark object for lazy runtime binding"), 1491 NULL, true); 1492 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false, 1493 N_("Mark object requiring immediate process"), 1494 NULL); 1495 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0, 1496 N_("Set maximum page size to SIZE"), N_("SIZE")); 1497 DEFINE_bool(muldefs, options::DASH_Z, '\0', false, 1498 N_("Allow multiple definitions of symbols"), 1499 NULL); 1500 // copyreloc is here in the list because there is only -z 1501 // nocopyreloc, not -z copyreloc. 1502 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true, 1503 NULL, 1504 N_("Do not create copy relocs")); 1505 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false, 1506 N_("Mark object not to use default search paths"), 1507 NULL); 1508 DEFINE_bool(nodelete, options::DASH_Z, '\0', false, 1509 N_("Mark DSO non-deletable at runtime"), 1510 NULL); 1511 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false, 1512 N_("Mark DSO not available to dlopen"), 1513 NULL); 1514 DEFINE_bool(nodump, options::DASH_Z, '\0', false, 1515 N_("Mark DSO not available to dldump"), 1516 NULL); 1517 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false, 1518 N_("Mark output as not requiring executable stack"), NULL); 1519 DEFINE_bool(now, options::DASH_Z, '\0', false, 1520 N_("Mark object for immediate function binding"), 1521 NULL); 1522 DEFINE_bool(origin, options::DASH_Z, '\0', false, 1523 N_("Mark DSO to indicate that needs immediate $ORIGIN " 1524 "processing at runtime"), NULL); 1525 DEFINE_bool(relro, options::DASH_Z, '\0', DEFAULT_LD_Z_RELRO, 1526 N_("Where possible mark variables read-only after relocation"), 1527 N_("Don't mark variables read-only after relocation")); 1528 DEFINE_uint64(stack_size, options::DASH_Z, '\0', 0, 1529 N_("Set PT_GNU_STACK segment p_memsz to SIZE"), N_("SIZE")); 1530 DEFINE_enum(start_stop_visibility, options::DASH_Z, '\0', "protected", 1531 N_("ELF symbol visibility for synthesized " 1532 "__start_* and __stop_* symbols"), 1533 ("[default,internal,hidden,protected]"), false, 1534 {"default", "internal", "hidden", "protected"}); 1535 DEFINE_bool(text, options::DASH_Z, '\0', false, 1536 N_("Do not permit relocations in read-only segments"), 1537 N_("Permit relocations in read-only segments")); 1538 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0', 1539 N_("Permit relocations in read-only segments"), 1540 NULL, true); 1541 DEFINE_bool(text_unlikely_segment, options::DASH_Z, '\0', false, 1542 N_("Move .text.unlikely sections to a separate segment."), 1543 N_("Do not move .text.unlikely sections to a separate " 1544 "segment.")); 1545 DEFINE_bool(keep_text_section_prefix, options::DASH_Z, '\0', false, 1546 N_("Keep .text.hot, .text.startup, .text.exit and .text.unlikely " 1547 "as separate sections in the final binary."), 1548 N_("Merge all .text.* prefix sections.")); 1549 1550 1551 public: 1552 typedef options::Dir_list Dir_list; 1553 1554 General_options(); 1555 1556 // Does post-processing on flags, making sure they all have 1557 // non-conflicting values. Also converts some flags from their 1558 // "standard" types (string, etc), to another type (enum, DirList), 1559 // which can be accessed via a separate method. Dies if it notices 1560 // any problems. 1561 void finalize(); 1562 1563 // True if we printed the version information. 1564 bool printed_version()1565 printed_version() const 1566 { return this->printed_version_; } 1567 1568 // The macro defines output() (based on --output), but that's a 1569 // generic name. Provide this alternative name, which is clearer. 1570 const char* output_file_name()1571 output_file_name() const 1572 { return this->output(); } 1573 1574 // This is not defined via a flag, but combines flags to say whether 1575 // the output is position-independent or not. 1576 bool output_is_position_independent()1577 output_is_position_independent() const 1578 { return this->shared() || this->pie(); } 1579 1580 // Return true if the output is something that can be exec()ed, such 1581 // as a static executable, or a position-dependent or 1582 // position-independent executable, but not a dynamic library or an 1583 // object file. 1584 bool output_is_executable()1585 output_is_executable() const 1586 { return !this->shared() && !this->relocatable(); } 1587 1588 // This would normally be static(), and defined automatically, but 1589 // since static is a keyword, we need to come up with our own name. 1590 bool is_static()1591 is_static() const 1592 { return static_; } 1593 1594 // In addition to getting the input and output formats as a string 1595 // (via format() and oformat()), we also give access as an enum. 1596 enum Object_format 1597 { 1598 // Ordinary ELF. 1599 OBJECT_FORMAT_ELF, 1600 // Straight binary format. 1601 OBJECT_FORMAT_BINARY 1602 }; 1603 1604 // Convert a string to an Object_format. Gives an error if the 1605 // string is not recognized. 1606 static Object_format 1607 string_to_object_format(const char* arg); 1608 1609 // Convert an Object_format to string. 1610 static const char* 1611 object_format_to_string(Object_format); 1612 1613 // Note: these functions are not very fast. 1614 Object_format format_enum() const; 1615 Object_format oformat_enum() const; 1616 1617 // Return whether FILENAME is in a system directory. 1618 bool 1619 is_in_system_directory(const std::string& name) const; 1620 1621 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_. 1622 bool should_retain_symbol(const char * symbol_name)1623 should_retain_symbol(const char* symbol_name) const 1624 { 1625 if (symbols_to_retain_.empty()) // means flag wasn't specified 1626 return true; 1627 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end(); 1628 } 1629 1630 // These are the best way to get access to the execstack state, 1631 // not execstack() and noexecstack() which are hard to use properly. 1632 bool is_execstack_set()1633 is_execstack_set() const 1634 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; } 1635 1636 bool is_stack_executable()1637 is_stack_executable() const 1638 { return this->execstack_status_ == EXECSTACK_YES; } 1639 1640 bool icf_enabled()1641 icf_enabled() const 1642 { return this->icf_status_ != ICF_NONE; } 1643 1644 bool icf_safe_folding()1645 icf_safe_folding() const 1646 { return this->icf_status_ == ICF_SAFE; } 1647 1648 // The --demangle option takes an optional string, and there is also 1649 // a --no-demangle option. This is the best way to decide whether 1650 // to demangle or not. 1651 bool do_demangle()1652 do_demangle() const 1653 { return this->do_demangle_; } 1654 1655 // Returns TRUE if any plugin libraries have been loaded. 1656 bool has_plugins()1657 has_plugins() const 1658 { return this->plugins_ != NULL; } 1659 1660 // Return a pointer to the plugin manager. 1661 Plugin_manager* plugins()1662 plugins() const 1663 { return this->plugins_; } 1664 1665 // True iff SYMBOL was found in the file specified by dynamic-list. 1666 bool in_dynamic_list(const char * symbol)1667 in_dynamic_list(const char* symbol) const 1668 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); } 1669 1670 // True if a --dynamic-list script was provided. 1671 bool have_dynamic_list()1672 have_dynamic_list() const 1673 { return this->have_dynamic_list_; } 1674 1675 // Finalize the dynamic list. 1676 void finalize_dynamic_list()1677 finalize_dynamic_list() 1678 { this->dynamic_list_.version_script_info()->finalize(); } 1679 1680 // The mode selected by the --incremental options. 1681 enum Incremental_mode 1682 { 1683 // No incremental linking (--no-incremental). 1684 INCREMENTAL_OFF, 1685 // Incremental update only (--incremental-update). 1686 INCREMENTAL_UPDATE, 1687 // Force a full link, but prepare for subsequent incremental link 1688 // (--incremental-full). 1689 INCREMENTAL_FULL, 1690 // Incremental update if possible, fallback to full link (--incremental). 1691 INCREMENTAL_AUTO 1692 }; 1693 1694 // The incremental linking mode. 1695 Incremental_mode incremental_mode()1696 incremental_mode() const 1697 { return this->incremental_mode_; } 1698 1699 // The disposition given by the --incremental-changed, 1700 // --incremental-unchanged or --incremental-unknown option. The 1701 // value may change as we proceed parsing the command line flags. 1702 Incremental_disposition incremental_disposition()1703 incremental_disposition() const 1704 { return this->incremental_disposition_; } 1705 1706 void set_incremental_disposition(Incremental_disposition disp)1707 set_incremental_disposition(Incremental_disposition disp) 1708 { this->incremental_disposition_ = disp; } 1709 1710 // The disposition to use for startup files (those that precede the 1711 // first --incremental-changed, etc. option). 1712 Incremental_disposition incremental_startup_disposition()1713 incremental_startup_disposition() const 1714 { return this->incremental_startup_disposition_; } 1715 1716 // Return true if S is the name of a library excluded from automatic 1717 // symbol export. 1718 bool 1719 check_excluded_libs(const std::string &s) const; 1720 1721 // If an explicit start address was given for section SECNAME with 1722 // the --section-start option, return true and set *PADDR to the 1723 // address. Otherwise return false. 1724 bool 1725 section_start(const char* secname, uint64_t* paddr) const; 1726 1727 // Return whether any --section-start option was used. 1728 bool any_section_start()1729 any_section_start() const 1730 { return !this->section_starts_.empty(); } 1731 1732 enum Fix_v4bx 1733 { 1734 // Leave original instruction. 1735 FIX_V4BX_NONE, 1736 // Replace instruction. 1737 FIX_V4BX_REPLACE, 1738 // Generate an interworking veneer. 1739 FIX_V4BX_INTERWORKING 1740 }; 1741 1742 Fix_v4bx fix_v4bx()1743 fix_v4bx() const 1744 { return (this->fix_v4bx_); } 1745 1746 enum Endianness 1747 { 1748 ENDIANNESS_NOT_SET, 1749 ENDIANNESS_BIG, 1750 ENDIANNESS_LITTLE 1751 }; 1752 1753 Endianness endianness()1754 endianness() const 1755 { return this->endianness_; } 1756 1757 enum Bsymbolic_kind 1758 { 1759 BSYMBOLIC_NONE, 1760 BSYMBOLIC_FUNCTIONS, 1761 BSYMBOLIC_ALL, 1762 }; 1763 1764 bool Bsymbolic()1765 Bsymbolic() const 1766 { return this->bsymbolic_ == BSYMBOLIC_ALL; } 1767 1768 bool Bsymbolic_functions()1769 Bsymbolic_functions() const 1770 { return this->bsymbolic_ == BSYMBOLIC_FUNCTIONS; } 1771 1772 bool discard_all()1773 discard_all() const 1774 { return this->discard_locals_ == DISCARD_ALL; } 1775 1776 bool discard_locals()1777 discard_locals() const 1778 { return this->discard_locals_ == DISCARD_LOCALS; } 1779 1780 bool discard_sec_merge()1781 discard_sec_merge() const 1782 { return this->discard_locals_ == DISCARD_SEC_MERGE; } 1783 1784 enum Orphan_handling 1785 { 1786 // Place orphan sections normally (default). 1787 ORPHAN_PLACE, 1788 // Discard all orphan sections. 1789 ORPHAN_DISCARD, 1790 // Warn when placing orphan sections. 1791 ORPHAN_WARN, 1792 // Issue error for orphan sections. 1793 ORPHAN_ERROR 1794 }; 1795 1796 Orphan_handling orphan_handling_enum()1797 orphan_handling_enum() const 1798 { return this->orphan_handling_enum_; } 1799 1800 elfcpp::STV start_stop_visibility_enum()1801 start_stop_visibility_enum() const 1802 { return this->start_stop_visibility_enum_; } 1803 1804 enum Power10_stubs 1805 { 1806 // Use Power10 insns on @notoc calls/branches, non-Power10 elsewhere. 1807 POWER10_STUBS_AUTO, 1808 // Don't use Power10 insns 1809 POWER10_STUBS_NO, 1810 // Always use Power10 insns 1811 POWER10_STUBS_YES 1812 }; 1813 1814 Power10_stubs power10_stubs_enum()1815 power10_stubs_enum() const 1816 { return this->power10_stubs_enum_; } 1817 1818 private: 1819 // Don't copy this structure. 1820 General_options(const General_options&); 1821 General_options& operator=(const General_options&); 1822 1823 // What local symbols to discard. 1824 enum Discard_locals 1825 { 1826 // Locals in merge sections (default). 1827 DISCARD_SEC_MERGE, 1828 // None (--discard-none). 1829 DISCARD_NONE, 1830 // Temporary locals (--discard-locals/-X). 1831 DISCARD_LOCALS, 1832 // All locals (--discard-all/-x). 1833 DISCARD_ALL 1834 }; 1835 1836 // Whether to mark the stack as executable. 1837 enum Execstack 1838 { 1839 // Not set on command line. 1840 EXECSTACK_FROM_INPUT, 1841 // Mark the stack as executable (-z execstack). 1842 EXECSTACK_YES, 1843 // Mark the stack as not executable (-z noexecstack). 1844 EXECSTACK_NO 1845 }; 1846 1847 enum Icf_status 1848 { 1849 // Do not fold any functions (Default or --icf=none). 1850 ICF_NONE, 1851 // All functions are candidates for folding. (--icf=all). 1852 ICF_ALL, 1853 // Only ctors and dtors are candidates for folding. (--icf=safe). 1854 ICF_SAFE 1855 }; 1856 1857 void set_icf_status(Icf_status value)1858 set_icf_status(Icf_status value) 1859 { this->icf_status_ = value; } 1860 1861 void set_execstack_status(Execstack value)1862 set_execstack_status(Execstack value) 1863 { this->execstack_status_ = value; } 1864 1865 void set_do_demangle(bool value)1866 set_do_demangle(bool value) 1867 { this->do_demangle_ = value; } 1868 1869 void set_static(bool value)1870 set_static(bool value) 1871 { static_ = value; } 1872 1873 void set_orphan_handling_enum(Orphan_handling value)1874 set_orphan_handling_enum(Orphan_handling value) 1875 { this->orphan_handling_enum_ = value; } 1876 1877 void set_start_stop_visibility_enum(elfcpp::STV value)1878 set_start_stop_visibility_enum(elfcpp::STV value) 1879 { this->start_stop_visibility_enum_ = value; } 1880 1881 void set_power10_stubs_enum(Power10_stubs value)1882 set_power10_stubs_enum(Power10_stubs value) 1883 { this->power10_stubs_enum_ = value; } 1884 1885 // These are called by finalize() to set up the search-path correctly. 1886 void add_to_library_path_with_sysroot(const std::string & arg)1887 add_to_library_path_with_sysroot(const std::string& arg) 1888 { this->add_search_directory_to_library_path(Search_directory(arg, true)); } 1889 1890 // Apply any sysroot to the directory lists. 1891 void 1892 add_sysroot(); 1893 1894 // Add a plugin and its arguments to the list of plugins. 1895 void 1896 add_plugin(const char* filename); 1897 1898 // Add a plugin option. 1899 void 1900 add_plugin_option(const char* opt); 1901 1902 void 1903 copy_from_posdep_options(const Position_dependent_options&); 1904 1905 // Whether we bind default visibility defined symbols locally for -shared. 1906 Bsymbolic_kind bsymbolic_; 1907 // Whether we printed version information. 1908 bool printed_version_; 1909 // Whether to mark the stack as executable. 1910 Execstack execstack_status_; 1911 // Whether to do code folding. 1912 Icf_status icf_status_; 1913 // Whether to do a static link. 1914 bool static_; 1915 // Whether to do demangling. 1916 bool do_demangle_; 1917 // List of plugin libraries. 1918 Plugin_manager* plugins_; 1919 // The parsed output of --dynamic-list files. For convenience in 1920 // script.cc, we store this as a Script_options object, even though 1921 // we only use a single Version_tree from it. 1922 Script_options dynamic_list_; 1923 // Whether a --dynamic-list file was provided. 1924 bool have_dynamic_list_; 1925 // The incremental linking mode. 1926 Incremental_mode incremental_mode_; 1927 // The disposition given by the --incremental-changed, 1928 // --incremental-unchanged or --incremental-unknown option. The 1929 // value may change as we proceed parsing the command line flags. 1930 Incremental_disposition incremental_disposition_; 1931 // The disposition to use for startup files (those marked 1932 // INCREMENTAL_STARTUP). 1933 Incremental_disposition incremental_startup_disposition_; 1934 // Whether we have seen one of the options that require incremental 1935 // build (--incremental-changed, --incremental-unchanged, 1936 // --incremental-unknown, or --incremental-startup-unchanged). 1937 bool implicit_incremental_; 1938 // Libraries excluded from automatic export, via --exclude-libs. 1939 Unordered_set<std::string> excluded_libs_; 1940 // List of symbol-names to keep, via -retain-symbol-info. 1941 Unordered_set<std::string> symbols_to_retain_; 1942 // Map from section name to address from --section-start. 1943 std::map<std::string, uint64_t> section_starts_; 1944 // Whether to process armv4 bx instruction relocation. 1945 Fix_v4bx fix_v4bx_; 1946 // Endianness. 1947 Endianness endianness_; 1948 // What local symbols to discard. 1949 Discard_locals discard_locals_; 1950 // Stack of saved options for --push-state/--pop-state. 1951 std::vector<Position_dependent_options*> options_stack_; 1952 // Orphan handling option, decoded to an enum value. 1953 Orphan_handling orphan_handling_enum_; 1954 // Symbol visibility for __start_* / __stop_* magic symbols. 1955 elfcpp::STV start_stop_visibility_enum_; 1956 // Power10 stubs option 1957 Power10_stubs power10_stubs_enum_; 1958 }; 1959 1960 // The position-dependent options. We use this to store the state of 1961 // the commandline at a particular point in parsing for later 1962 // reference. For instance, if we see "ld --whole-archive foo.a 1963 // --no-whole-archive," we want to store the whole-archive option with 1964 // foo.a, so when the time comes to parse foo.a we know we should do 1965 // it in whole-archive mode. We could store all of General_options, 1966 // but that's big, so we just pick the subset of flags that actually 1967 // change in a position-dependent way. 1968 1969 #define DEFINE_posdep(varname__, type__) \ 1970 public: \ 1971 type__ \ 1972 varname__() const \ 1973 { return this->varname__##_; } \ 1974 \ 1975 void \ 1976 set_##varname__(type__ value) \ 1977 { this->varname__##_ = value; } \ 1978 private: \ 1979 type__ varname__##_ 1980 1981 class Position_dependent_options 1982 { 1983 public: 1984 Position_dependent_options(const General_options& options 1985 = Position_dependent_options::default_options_) 1986 { copy_from_options(options); } 1987 1988 void copy_from_options(const General_options & options)1989 copy_from_options(const General_options& options) 1990 { 1991 this->set_as_needed(options.as_needed()); 1992 this->set_Bdynamic(options.Bdynamic()); 1993 this->set_format_enum(options.format_enum()); 1994 this->set_whole_archive(options.whole_archive()); 1995 this->set_incremental_disposition(options.incremental_disposition()); 1996 } 1997 1998 DEFINE_posdep(as_needed, bool); 1999 DEFINE_posdep(Bdynamic, bool); 2000 DEFINE_posdep(format_enum, General_options::Object_format); 2001 DEFINE_posdep(whole_archive, bool); 2002 DEFINE_posdep(incremental_disposition, Incremental_disposition); 2003 2004 private: 2005 // This is a General_options with everything set to its default 2006 // value. A Position_dependent_options created with no argument 2007 // will take its values from here. 2008 static General_options default_options_; 2009 }; 2010 2011 2012 // A single file or library argument from the command line. 2013 2014 class Input_file_argument 2015 { 2016 public: 2017 enum Input_file_type 2018 { 2019 // A regular file, name used as-is, not searched. 2020 INPUT_FILE_TYPE_FILE, 2021 // A library name. When used, "lib" will be prepended and ".so" or 2022 // ".a" appended to make a filename, and that filename will be searched 2023 // for using the -L paths. 2024 INPUT_FILE_TYPE_LIBRARY, 2025 // A regular file, name used as-is, but searched using the -L paths. 2026 INPUT_FILE_TYPE_SEARCHED_FILE 2027 }; 2028 2029 // name: file name or library name 2030 // type: the type of this input file. 2031 // extra_search_path: an extra directory to look for the file, prior 2032 // to checking the normal library search path. If this is "", 2033 // then no extra directory is added. 2034 // just_symbols: whether this file only defines symbols. 2035 // options: The position dependent options at this point in the 2036 // command line, such as --whole-archive. Input_file_argument()2037 Input_file_argument() 2038 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""), 2039 just_symbols_(false), options_(), arg_serial_(0) 2040 { } 2041 Input_file_argument(const char * name,Input_file_type type,const char * extra_search_path,bool just_symbols,const Position_dependent_options & options)2042 Input_file_argument(const char* name, Input_file_type type, 2043 const char* extra_search_path, 2044 bool just_symbols, 2045 const Position_dependent_options& options) 2046 : name_(name), type_(type), extra_search_path_(extra_search_path), 2047 just_symbols_(just_symbols), options_(options), arg_serial_(0) 2048 { } 2049 2050 // You can also pass in a General_options instance instead of a 2051 // Position_dependent_options. In that case, we extract the 2052 // position-independent vars from the General_options and only store 2053 // those. Input_file_argument(const char * name,Input_file_type type,const char * extra_search_path,bool just_symbols,const General_options & options)2054 Input_file_argument(const char* name, Input_file_type type, 2055 const char* extra_search_path, 2056 bool just_symbols, 2057 const General_options& options) 2058 : name_(name), type_(type), extra_search_path_(extra_search_path), 2059 just_symbols_(just_symbols), options_(options), arg_serial_(0) 2060 { } 2061 2062 const char* name()2063 name() const 2064 { return this->name_.c_str(); } 2065 2066 const Position_dependent_options& options()2067 options() const 2068 { return this->options_; } 2069 2070 bool is_lib()2071 is_lib() const 2072 { return type_ == INPUT_FILE_TYPE_LIBRARY; } 2073 2074 bool is_searched_file()2075 is_searched_file() const 2076 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; } 2077 2078 const char* extra_search_path()2079 extra_search_path() const 2080 { 2081 return (this->extra_search_path_.empty() 2082 ? NULL 2083 : this->extra_search_path_.c_str()); 2084 } 2085 2086 // Return whether we should only read symbols from this file. 2087 bool just_symbols()2088 just_symbols() const 2089 { return this->just_symbols_; } 2090 2091 // Return whether this file may require a search using the -L 2092 // options. 2093 bool may_need_search()2094 may_need_search() const 2095 { 2096 return (this->is_lib() 2097 || this->is_searched_file() 2098 || !this->extra_search_path_.empty()); 2099 } 2100 2101 // Set the serial number for this argument. 2102 void set_arg_serial(unsigned int arg_serial)2103 set_arg_serial(unsigned int arg_serial) 2104 { this->arg_serial_ = arg_serial; } 2105 2106 // Get the serial number. 2107 unsigned int arg_serial()2108 arg_serial() const 2109 { return this->arg_serial_; } 2110 2111 private: 2112 // We use std::string, not const char*, here for convenience when 2113 // using script files, so that we do not have to preserve the string 2114 // in that case. 2115 std::string name_; 2116 Input_file_type type_; 2117 std::string extra_search_path_; 2118 bool just_symbols_; 2119 Position_dependent_options options_; 2120 // A unique index for this file argument in the argument list. 2121 unsigned int arg_serial_; 2122 }; 2123 2124 // A file or library, or a group, from the command line. 2125 2126 class Input_argument 2127 { 2128 public: 2129 // Create a file or library argument. Input_argument(Input_file_argument file)2130 explicit Input_argument(Input_file_argument file) 2131 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL) 2132 { } 2133 2134 // Create a group argument. Input_argument(Input_file_group * group)2135 explicit Input_argument(Input_file_group* group) 2136 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL) 2137 { } 2138 2139 // Create a lib argument. Input_argument(Input_file_lib * lib)2140 explicit Input_argument(Input_file_lib* lib) 2141 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL) 2142 { } 2143 2144 // Return whether this is a file. 2145 bool is_file()2146 is_file() const 2147 { return this->is_file_; } 2148 2149 // Return whether this is a group. 2150 bool is_group()2151 is_group() const 2152 { return !this->is_file_ && this->lib_ == NULL; } 2153 2154 // Return whether this is a lib. 2155 bool is_lib()2156 is_lib() const 2157 { return this->lib_ != NULL; } 2158 2159 // Return the information about the file. 2160 const Input_file_argument& file()2161 file() const 2162 { 2163 gold_assert(this->is_file_); 2164 return this->file_; 2165 } 2166 2167 // Return the information about the group. 2168 const Input_file_group* group()2169 group() const 2170 { 2171 gold_assert(!this->is_file_); 2172 return this->group_; 2173 } 2174 2175 Input_file_group* group()2176 group() 2177 { 2178 gold_assert(!this->is_file_); 2179 return this->group_; 2180 } 2181 2182 // Return the information about the lib. 2183 const Input_file_lib* lib()2184 lib() const 2185 { 2186 gold_assert(!this->is_file_); 2187 gold_assert(this->lib_); 2188 return this->lib_; 2189 } 2190 2191 Input_file_lib* lib()2192 lib() 2193 { 2194 gold_assert(!this->is_file_); 2195 gold_assert(this->lib_); 2196 return this->lib_; 2197 } 2198 2199 // If a script generated this argument, store a pointer to the script info. 2200 // Currently used only for recording incremental link information. 2201 void set_script_info(Script_info * info)2202 set_script_info(Script_info* info) 2203 { this->script_info_ = info; } 2204 2205 Script_info* script_info()2206 script_info() const 2207 { return this->script_info_; } 2208 2209 private: 2210 bool is_file_; 2211 Input_file_argument file_; 2212 Input_file_group* group_; 2213 Input_file_lib* lib_; 2214 Script_info* script_info_; 2215 }; 2216 2217 typedef std::vector<Input_argument> Input_argument_list; 2218 2219 // A group from the command line. This is a set of arguments within 2220 // --start-group ... --end-group. 2221 2222 class Input_file_group 2223 { 2224 public: 2225 typedef Input_argument_list::const_iterator const_iterator; 2226 Input_file_group()2227 Input_file_group() 2228 : files_() 2229 { } 2230 2231 // Add a file to the end of the group. 2232 Input_argument& add_file(const Input_file_argument & arg)2233 add_file(const Input_file_argument& arg) 2234 { 2235 this->files_.push_back(Input_argument(arg)); 2236 return this->files_.back(); 2237 } 2238 2239 // Iterators to iterate over the group contents. 2240 2241 const_iterator begin()2242 begin() const 2243 { return this->files_.begin(); } 2244 2245 const_iterator end()2246 end() const 2247 { return this->files_.end(); } 2248 2249 private: 2250 Input_argument_list files_; 2251 }; 2252 2253 // A lib from the command line. This is a set of arguments within 2254 // --start-lib ... --end-lib. 2255 2256 class Input_file_lib 2257 { 2258 public: 2259 typedef Input_argument_list::const_iterator const_iterator; 2260 Input_file_lib(const Position_dependent_options & options)2261 Input_file_lib(const Position_dependent_options& options) 2262 : files_(), options_(options) 2263 { } 2264 2265 // Add a file to the end of the lib. 2266 Input_argument& add_file(const Input_file_argument & arg)2267 add_file(const Input_file_argument& arg) 2268 { 2269 this->files_.push_back(Input_argument(arg)); 2270 return this->files_.back(); 2271 } 2272 2273 const Position_dependent_options& options()2274 options() const 2275 { return this->options_; } 2276 2277 // Iterators to iterate over the lib contents. 2278 2279 const_iterator begin()2280 begin() const 2281 { return this->files_.begin(); } 2282 2283 const_iterator end()2284 end() const 2285 { return this->files_.end(); } 2286 2287 size_t size()2288 size() const 2289 { return this->files_.size(); } 2290 2291 private: 2292 Input_argument_list files_; 2293 Position_dependent_options options_; 2294 }; 2295 2296 // A list of files from the command line or a script. 2297 2298 class Input_arguments 2299 { 2300 public: 2301 typedef Input_argument_list::const_iterator const_iterator; 2302 Input_arguments()2303 Input_arguments() 2304 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0) 2305 { } 2306 2307 // Add a file. 2308 Input_argument& 2309 add_file(Input_file_argument& arg); 2310 2311 // Start a group (the --start-group option). 2312 void 2313 start_group(); 2314 2315 // End a group (the --end-group option). 2316 void 2317 end_group(); 2318 2319 // Start a lib (the --start-lib option). 2320 void 2321 start_lib(const Position_dependent_options&); 2322 2323 // End a lib (the --end-lib option). 2324 void 2325 end_lib(); 2326 2327 // Return whether we are currently in a group. 2328 bool in_group()2329 in_group() const 2330 { return this->in_group_; } 2331 2332 // Return whether we are currently in a lib. 2333 bool in_lib()2334 in_lib() const 2335 { return this->in_lib_; } 2336 2337 // The number of entries in the list. 2338 int size()2339 size() const 2340 { return this->input_argument_list_.size(); } 2341 2342 // Iterators to iterate over the list of input files. 2343 2344 const_iterator begin()2345 begin() const 2346 { return this->input_argument_list_.begin(); } 2347 2348 const_iterator end()2349 end() const 2350 { return this->input_argument_list_.end(); } 2351 2352 // Return whether the list is empty. 2353 bool empty()2354 empty() const 2355 { return this->input_argument_list_.empty(); } 2356 2357 // Return the number of input files. This may be larger than 2358 // input_argument_list_.size(), because of files that are part 2359 // of groups or libs. 2360 int number_of_input_files()2361 number_of_input_files() const 2362 { return this->file_count_; } 2363 2364 private: 2365 Input_argument_list input_argument_list_; 2366 bool in_group_; 2367 bool in_lib_; 2368 unsigned int file_count_; 2369 }; 2370 2371 2372 // All the information read from the command line. These are held in 2373 // three separate structs: one to hold the options (--foo), one to 2374 // hold the filenames listed on the commandline, and one to hold 2375 // linker script information. This third is not a subset of the other 2376 // two because linker scripts can be specified either as options (via 2377 // -T) or as a file. 2378 2379 class Command_line 2380 { 2381 public: 2382 typedef Input_arguments::const_iterator const_iterator; 2383 2384 Command_line(); 2385 2386 // Process the command line options. This will exit with an 2387 // appropriate error message if an unrecognized option is seen. 2388 void 2389 process(int argc, const char** argv); 2390 2391 // Process one command-line option. This takes the index of argv to 2392 // process, and returns the index for the next option. no_more_options 2393 // is set to true if argv[i] is "--". 2394 int 2395 process_one_option(int argc, const char** argv, int i, 2396 bool* no_more_options); 2397 2398 // Get the general options. 2399 const General_options& options()2400 options() const 2401 { return this->options_; } 2402 2403 // Get the position dependent options. 2404 const Position_dependent_options& position_dependent_options()2405 position_dependent_options() const 2406 { return this->position_options_; } 2407 2408 // Get the linker-script options. 2409 Script_options& script_options()2410 script_options() 2411 { return this->script_options_; } 2412 2413 // Finalize the version-script options and return them. 2414 const Version_script_info& 2415 version_script(); 2416 2417 // Get the input files. 2418 Input_arguments& inputs()2419 inputs() 2420 { return this->inputs_; } 2421 2422 // The number of input files. 2423 int number_of_input_files()2424 number_of_input_files() const 2425 { return this->inputs_.number_of_input_files(); } 2426 2427 // Iterators to iterate over the list of input files. 2428 2429 const_iterator begin()2430 begin() const 2431 { return this->inputs_.begin(); } 2432 2433 const_iterator end()2434 end() const 2435 { return this->inputs_.end(); } 2436 2437 private: 2438 Command_line(const Command_line&); 2439 Command_line& operator=(const Command_line&); 2440 2441 // This is a dummy class to provide a constructor that runs before 2442 // the constructor for the General_options. The Pre_options constructor 2443 // is used as a hook to set the flag enabling the options to register 2444 // themselves. 2445 struct Pre_options { 2446 Pre_options(); 2447 }; 2448 2449 // This must come before options_! 2450 Pre_options pre_options_; 2451 General_options options_; 2452 Position_dependent_options position_options_; 2453 Script_options script_options_; 2454 Input_arguments inputs_; 2455 }; 2456 2457 } // End namespace gold. 2458 2459 #endif // !defined(GOLD_OPTIONS_H) 2460