1// options.h -- handle command line options for gold -*- C++ -*- 2 3// Copyright (C) 2006-2017 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 49namespace gold 50{ 51 52class Command_line; 53class General_options; 54class Search_directory; 55class Input_file_group; 56class Input_file_lib; 57class Position_dependent_options; 58class Target; 59class Plugin_manager; 60class Script_info; 61 62// Incremental build action for a specific file, as selected by the user. 63 64enum 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. 82namespace options 83{ 84typedef std::vector<Search_directory> Dir_list; 85typedef 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 90extern void 91parse_bool(const char* option_name, const char* arg, bool* retval); 92 93extern void 94parse_int(const char* option_name, const char* arg, int* retval); 95 96extern void 97parse_uint(const char* option_name, const char* arg, int* retval); 98 99extern void 100parse_uint64(const char* option_name, const char* arg, uint64_t* retval); 101 102extern void 103parse_double(const char* option_name, const char* arg, double* retval); 104 105extern void 106parse_percent(const char* option_name, const char* arg, double* retval); 107 108extern void 109parse_string(const char* option_name, const char* arg, const char** retval); 110 111extern void 112parse_optional_string(const char* option_name, const char* arg, 113 const char** retval); 114 115extern void 116parse_dirlist(const char* option_name, const char* arg, Dir_list* retval); 117 118extern void 119parse_set(const char* option_name, const char* arg, String_set* retval); 120 121extern void 122parse_choices(const char* option_name, const char* arg, const char** retval, 123 const char* choices[], int num_choices); 124 125struct 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". 134enum 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. 161struct 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; 172 173 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 197 takes_argument() const 198 { return this->helparg != NULL; } 199 200 // Whether the argument is optional. 201 bool 202 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. 216struct 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 229 ~Struct_var() // To make gcc happy. 230 { } 231}; 232 233// This is for "special" options that aren't of any predefined type. 234struct 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*); 239 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 { } 246 247 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// When you have a list of possible values (expressed as string) 477// After helparg__ should come an initializer list, like 478// {"foo", "bar", "baz"} 479#define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \ 480 helpstring__, helparg__, ...) \ 481 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 482 default_value__, helpstring__, helparg__, false, \ 483 const char*, const char*, parse_choices_##varname__, false) \ 484 private: \ 485 static void parse_choices_##varname__(const char* option_name, \ 486 const char* arg, \ 487 const char** retval) { \ 488 const char* choices[] = __VA_ARGS__; \ 489 options::parse_choices(option_name, arg, retval, \ 490 choices, sizeof(choices) / sizeof(*choices)); \ 491 } 492 493// This is like DEFINE_bool, but VARNAME is the name of a different 494// option. This option becomes an alias for that one. INVERT is true 495// if this option is an inversion of the other one. 496#define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \ 497 helpstring__, no_helpstring__, invert__) \ 498 private: \ 499 struct Struct_##option__ : public options::Struct_var \ 500 { \ 501 Struct_##option__() \ 502 : option(#option__, dashes__, shortname__, "", helpstring__, \ 503 NULL, false, this, \ 504 General_options::varname__##is_default ^ invert__) \ 505 { } \ 506 \ 507 void \ 508 parse_to_value(const char*, const char*, \ 509 Command_line*, General_options* options) \ 510 { \ 511 options->set_##varname__(!invert__); \ 512 options->set_user_set_##varname__(); \ 513 } \ 514 \ 515 options::One_option option; \ 516 }; \ 517 Struct_##option__ option__##_; \ 518 \ 519 struct Struct_no_##option__ : public options::Struct_var \ 520 { \ 521 Struct_no_##option__() \ 522 : option((dashes__ == options::DASH_Z \ 523 ? "no" #option__ \ 524 : "no-" #option__), \ 525 dashes__, '\0', "", no_helpstring__, \ 526 NULL, false, this, \ 527 !General_options::varname__##is_default ^ invert__) \ 528 { } \ 529 \ 530 void \ 531 parse_to_value(const char*, const char*, \ 532 Command_line*, General_options* options) \ 533 { \ 534 options->set_##varname__(invert__); \ 535 options->set_user_set_##varname__(); \ 536 } \ 537 \ 538 options::One_option option; \ 539 }; \ 540 Struct_no_##option__ no_##option__##_initializer_ 541 542// This is like DEFINE_uint64, but VARNAME is the name of a different 543// option. This option becomes an alias for that one. 544#define DEFINE_uint64_alias(option__, varname__, dashes__, shortname__, \ 545 helpstring__, helparg__) \ 546 private: \ 547 struct Struct_##option__ : public options::Struct_var \ 548 { \ 549 Struct_##option__() \ 550 : option(#option__, dashes__, shortname__, "", helpstring__, \ 551 helparg__, false, this, false) \ 552 { } \ 553 \ 554 void \ 555 parse_to_value(const char* option_name, const char* arg, \ 556 Command_line*, General_options* options) \ 557 { \ 558 uint64_t value; \ 559 options::parse_uint64(option_name, arg, &value); \ 560 options->set_##varname__(value); \ 561 options->set_user_set_##varname__(); \ 562 } \ 563 \ 564 options::One_option option; \ 565 }; \ 566 Struct_##option__ option__##_; 567 568// This is used for non-standard flags. It defines no functions; it 569// just calls General_options::parse_VARNAME whenever the flag is 570// seen. We declare parse_VARNAME as a static member of 571// General_options; you are responsible for defining it there. 572// helparg__ should be NULL iff this special-option is a boolean. 573#define DEFINE_special(varname__, dashes__, shortname__, \ 574 helpstring__, helparg__) \ 575 private: \ 576 void parse_##varname__(const char* option, const char* arg, \ 577 Command_line* inputs); \ 578 struct Struct_##varname__ : public options::Struct_special \ 579 { \ 580 Struct_##varname__() \ 581 : options::Struct_special(#varname__, dashes__, shortname__, \ 582 &General_options::parse_##varname__, \ 583 helpstring__, helparg__) \ 584 { } \ 585 }; \ 586 Struct_##varname__ varname__##_initializer_ 587 588// An option that takes an optional string argument. If the option is 589// used with no argument, the value will be the default, and 590// user_set_via_option will be true. 591#define DEFINE_optional_string(varname__, dashes__, shortname__, \ 592 default_value__, \ 593 helpstring__, helparg__) \ 594 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 595 default_value__, helpstring__, helparg__, true, \ 596 const char*, const char*, options::parse_optional_string, \ 597 false) 598 599// A directory to search. For each directory we record whether it is 600// in the sysroot. We need to know this so that, if a linker script 601// is found within the sysroot, we will apply the sysroot to any files 602// named by that script. 603 604class Search_directory 605{ 606 public: 607 // We need a default constructor because we put this in a 608 // std::vector. 609 Search_directory() 610 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false) 611 { } 612 613 // This is the usual constructor. 614 Search_directory(const std::string& name, bool put_in_sysroot) 615 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false) 616 { 617 if (this->name_.empty()) 618 this->name_ = "."; 619 } 620 621 // This is called if we have a sysroot. The sysroot is prefixed to 622 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is 623 // set to true for any enries which are in the sysroot (this will 624 // naturally include any entries for which put_in_sysroot_ is true). 625 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of 626 // passing SYSROOT to lrealpath. 627 void 628 add_sysroot(const char* sysroot, const char* canonical_sysroot); 629 630 // Get the directory name. 631 const std::string& 632 name() const 633 { return this->name_; } 634 635 // Return whether this directory is in the sysroot. 636 bool 637 is_in_sysroot() const 638 { return this->is_in_sysroot_; } 639 640 // Return whether this is considered a system directory. 641 bool 642 is_system_directory() const 643 { return this->put_in_sysroot_ || this->is_in_sysroot_; } 644 645 private: 646 // The directory name. 647 std::string name_; 648 // True if the sysroot should be added as a prefix for this 649 // directory (if there is a sysroot). This is true for system 650 // directories that we search by default. 651 bool put_in_sysroot_; 652 // True if this directory is in the sysroot (if there is a sysroot). 653 // This is true if there is a sysroot and either 1) put_in_sysroot_ 654 // is true, or 2) the directory happens to be in the sysroot based 655 // on a pathname comparison. 656 bool is_in_sysroot_; 657}; 658 659class General_options 660{ 661 private: 662 // NOTE: For every option that you add here, also consider if you 663 // should add it to Position_dependent_options. 664 DEFINE_special(help, options::TWO_DASHES, '\0', 665 N_("Report usage information"), NULL); 666 DEFINE_special(version, options::TWO_DASHES, 'v', 667 N_("Report version information"), NULL); 668 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0', 669 N_("Report version and target information"), NULL); 670 671 // These options are sorted approximately so that for each letter in 672 // the alphabet, we show the option whose shortname is that letter 673 // (if any) and then every longname that starts with that letter (in 674 // alphabetical order). For both, lowercase sorts before uppercase. 675 // The -z options come last. 676 677 // a 678 679 DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false, 680 N_("Not supported"), 681 N_("Do not copy DT_NEEDED tags from shared libraries")); 682 683 DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES, 684 '\0', 685 N_("Allow multiple definitions of symbols"), 686 N_("Do not allow multiple definitions"), false); 687 688 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false, 689 N_("Allow unresolved references in shared libraries"), 690 N_("Do not allow unresolved references in shared libraries")); 691 692 DEFINE_bool(apply_dynamic_relocs, options::TWO_DASHES, '\0', true, 693 N_("Apply link-time values for dynamic relocations"), 694 N_("(aarch64 only) Do not apply link-time values " 695 "for dynamic relocations")); 696 697 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false, 698 N_("Use DT_NEEDED only for shared libraries that are used"), 699 N_("Use DT_NEEDED for all shared libraries")); 700 701 DEFINE_enum(assert, options::ONE_DASH, '\0', NULL, 702 N_("Ignored"), N_("[ignored]"), 703 {"definitions", "nodefinitions", "nosymbolic", "pure-text"}); 704 705 // b 706 707 // This should really be an "enum", but it's too easy for folks to 708 // forget to update the list as they add new targets. So we just 709 // accept any string. We'll fail later (when the string is parsed), 710 // if the target isn't actually supported. 711 DEFINE_string(format, options::TWO_DASHES, 'b', "elf", 712 N_("Set input format"), ("[elf,binary]")); 713 714 DEFINE_bool(be8,options::TWO_DASHES, '\0', false, 715 N_("Output BE8 format image"), NULL); 716 717 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "tree", 718 N_("Generate build ID note"), 719 N_("[=STYLE]")); 720 721 DEFINE_uint64(build_id_chunk_size_for_treehash, 722 options::TWO_DASHES, '\0', 2 << 20, 723 N_("Chunk size for '--build-id=tree'"), N_("SIZE")); 724 725 DEFINE_uint64(build_id_min_file_size_for_treehash, options::TWO_DASHES, 726 '\0', 40 << 20, 727 N_("Minimum output file size for '--build-id=tree' to work" 728 " differently than '--build-id=sha1'"), N_("SIZE")); 729 730 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true, 731 N_("-l searches for shared libraries"), NULL); 732 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0', 733 N_("-l does not search for shared libraries"), NULL, 734 true); 735 DEFINE_bool_alias(dy, Bdynamic, options::ONE_DASH, '\0', 736 N_("alias for -Bdynamic"), NULL, false); 737 DEFINE_bool_alias(dn, Bdynamic, options::ONE_DASH, '\0', 738 N_("alias for -Bstatic"), NULL, true); 739 740 DEFINE_bool(Bgroup, options::ONE_DASH, '\0', false, 741 N_("Use group name lookup rules for shared library"), NULL); 742 743 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false, 744 N_("Generate shared library (alias for -G/-shared)"), NULL); 745 746 DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false, 747 N_("Bind defined symbols locally"), NULL); 748 749 DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false, 750 N_("Bind defined function symbols locally"), NULL); 751 752 // c 753 754 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true, 755 N_("Check segment addresses for overlaps"), 756 N_("Do not check segment addresses for overlaps")); 757 758 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", 759 N_("Compress .debug_* sections in the output file"), 760 ("[none,zlib,zlib-gnu,zlib-gabi]"), 761 {"none", "zlib", "zlib-gnu", "zlib-gabi"}); 762 763 DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false, 764 N_("Not supported"), 765 N_("Do not copy DT_NEEDED tags from shared libraries")); 766 767 DEFINE_bool(cref, options::TWO_DASHES, '\0', false, 768 N_("Output cross reference table"), 769 N_("Do not output cross reference table")); 770 771 DEFINE_bool(ctors_in_init_array, options::TWO_DASHES, '\0', true, 772 N_("Use DT_INIT_ARRAY for all constructors"), 773 N_("Handle constructors as directed by compiler")); 774 775 // d 776 777 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false, 778 N_("Define common symbols"), 779 N_("Do not define common symbols in relocatable output")); 780 DEFINE_bool(dc, options::ONE_DASH, '\0', false, 781 N_("Alias for -d"), NULL); 782 DEFINE_bool(dp, options::ONE_DASH, '\0', false, 783 N_("Alias for -d"), NULL); 784 785 DEFINE_string(debug, options::TWO_DASHES, '\0', "", 786 N_("Turn on debugging"), 787 N_("[all,files,script,task][,...]")); 788 789 DEFINE_special(defsym, options::TWO_DASHES, '\0', 790 N_("Define a symbol"), N_("SYMBOL=EXPRESSION")); 791 792 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL, 793 N_("Demangle C++ symbols in log messages"), 794 N_("[=STYLE]")); 795 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false, 796 N_("Do not demangle C++ symbols in log messages"), 797 NULL); 798 799 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false, 800 N_("Look for violations of the C++ One Definition Rule"), 801 N_("Do not look for violations of the C++ One Definition Rule")); 802 803 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false, 804 N_("Add data symbols to dynamic symbols"), NULL); 805 806 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false, 807 N_("Add C++ operator new/delete to dynamic symbols"), NULL); 808 809 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false, 810 N_("Add C++ typeinfo to dynamic symbols"), NULL); 811 812 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0', 813 N_("Read a list of dynamic symbols"), N_("FILE")); 814 815 // e 816 817 DEFINE_bool(emit_stub_syms, options::TWO_DASHES, '\0', true, 818 N_("(PowerPC only) Label linker stubs with a symbol"), 819 N_("(PowerPC only) Do not label linker stubs with a symbol")); 820 821 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL, 822 N_("Set program start address"), N_("ADDRESS")); 823 824 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false, 825 N_("Create exception frame header"), 826 N_("Do not create exception frame header")); 827 828 // Alphabetized under 'e' because the option is spelled --enable-new-dtags. 829 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', true, 830 N_("Enable use of DT_RUNPATH"), 831 N_("Disable use of DT_RUNPATH")); 832 833 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL, 834 N_("(ARM only) Do not warn about objects with incompatible " 835 "enum sizes")); 836 837 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0', 838 N_("Exclude libraries from automatic export"), 839 N_(("lib,lib ..."))); 840 841 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false, 842 N_("Export all dynamic symbols"), 843 N_("Do not export all dynamic symbols")); 844 845 DEFINE_set(export_dynamic_symbol, options::TWO_DASHES, '\0', 846 N_("Export SYMBOL to dynamic symbol table"), N_("SYMBOL")); 847 848 DEFINE_special(EB, options::ONE_DASH, '\0', 849 N_("Link big-endian objects."), NULL); 850 DEFINE_special(EL, options::ONE_DASH, '\0', 851 N_("Link little-endian objects."), NULL); 852 853 // f 854 855 DEFINE_set(auxiliary, options::TWO_DASHES, 'f', 856 N_("Auxiliary filter for shared object symbol table"), 857 N_("SHLIB")); 858 859 DEFINE_string(filter, options::TWO_DASHES, 'F', NULL, 860 N_("Filter for shared object symbol table"), 861 N_("SHLIB")); 862 863 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false, 864 N_("Treat warnings as errors"), 865 N_("Do not treat warnings as errors")); 866 867 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini", 868 N_("Call SYMBOL at unload-time"), N_("SYMBOL")); 869 870 DEFINE_bool(fix_arm1176, options::TWO_DASHES, '\0', true, 871 N_("(ARM only) Fix binaries for ARM1176 erratum"), 872 N_("(ARM only) Do not fix binaries for ARM1176 erratum")); 873 874 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false, 875 N_("(ARM only) Fix binaries for Cortex-A8 erratum"), 876 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum")); 877 878 DEFINE_bool(fix_cortex_a53_843419, options::TWO_DASHES, '\0', false, 879 N_("(AArch64 only) Fix Cortex-A53 erratum 843419"), 880 N_("(AArch64 only) Do not fix Cortex-A53 erratum 843419")); 881 882 DEFINE_bool(fix_cortex_a53_835769, options::TWO_DASHES, '\0', false, 883 N_("(AArch64 only) Fix Cortex-A53 erratum 835769"), 884 N_("(AArch64 only) Do not fix Cortex-A53 erratum 835769")); 885 886 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0', 887 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"), 888 NULL); 889 890 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0', 891 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking " 892 "veneer"), 893 NULL); 894 895 DEFINE_string(fuse_ld, options::ONE_DASH, '\0', "", 896 N_("Ignored for GCC linker option compatibility"), 897 ""); 898 899 // g 900 901 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false, 902 N_("Ignored"), NULL); 903 904 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false, 905 N_("Remove unused sections"), 906 N_("Don't remove unused sections")); 907 908 DEFINE_bool(gdb_index, options::TWO_DASHES, '\0', false, 909 N_("Generate .gdb_index section"), 910 N_("Do not generate .gdb_index section")); 911 912 DEFINE_bool(gnu_unique, options::TWO_DASHES, '\0', true, 913 N_("Enable STB_GNU_UNIQUE symbol binding"), 914 N_("Disable STB_GNU_UNIQUE symbol binding")); 915 916 DEFINE_bool(shared, options::ONE_DASH, 'G', false, 917 N_("Generate shared library"), NULL); 918 919 // h 920 921 DEFINE_string(soname, options::ONE_DASH, 'h', NULL, 922 N_("Set shared library name"), N_("FILENAME")); 923 924 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0, 925 N_("Min fraction of empty buckets in dynamic hash"), 926 N_("FRACTION")); 927 928 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv", 929 N_("Dynamic hash style"), N_("[sysv,gnu,both]"), 930 {"sysv", "gnu", "both"}); 931 932 // i 933 934 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0', 935 N_("Alias for -r"), NULL, false); 936 937 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none", 938 N_("Identical Code Folding. " 939 "\'--icf=safe\' Folds ctors, dtors and functions whose" 940 " pointers are definitely not taken"), 941 ("[none,all,safe]"), 942 {"none", "all", "safe"}); 943 944 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0, 945 N_("Number of iterations of ICF (default 2)"), N_("COUNT")); 946 947 DEFINE_special(incremental, options::TWO_DASHES, '\0', 948 N_("Do an incremental link if possible; " 949 "otherwise, do a full link and prepare output " 950 "for incremental linking"), NULL); 951 952 DEFINE_special(no_incremental, options::TWO_DASHES, '\0', 953 N_("Do a full link (default)"), NULL); 954 955 DEFINE_special(incremental_full, options::TWO_DASHES, '\0', 956 N_("Do a full link and " 957 "prepare output for incremental linking"), NULL); 958 959 DEFINE_special(incremental_update, options::TWO_DASHES, '\0', 960 N_("Do an incremental link; exit if not possible"), NULL); 961 962 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL, 963 N_("Set base file for incremental linking" 964 " (default is output file)"), 965 N_("FILE")); 966 967 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0', 968 N_("Assume files changed"), NULL); 969 970 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0', 971 N_("Assume files didn't change"), NULL); 972 973 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0', 974 N_("Use timestamps to check files (default)"), NULL); 975 976 DEFINE_special(incremental_startup_unchanged, options::TWO_DASHES, '\0', 977 N_("Assume startup files unchanged " 978 "(files preceding this option)"), NULL); 979 980 DEFINE_percent(incremental_patch, options::TWO_DASHES, '\0', 10, 981 N_("Amount of extra space to allocate for patches " 982 "(default 10)"), 983 N_("PERCENT")); 984 985 DEFINE_string(init, options::ONE_DASH, '\0', "_init", 986 N_("Call SYMBOL at load-time"), N_("SYMBOL")); 987 988 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL, 989 N_("Set dynamic linker path"), N_("PROGRAM")); 990 991 // j 992 993 DEFINE_special(just_symbols, options::TWO_DASHES, '\0', 994 N_("Read only symbol values from FILE"), N_("FILE")); 995 996 // k 997 998 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true, 999 N_("Keep files mapped across passes"), 1000 N_("Release mapped files after each pass")); 1001 1002 DEFINE_set(keep_unique, options::TWO_DASHES, '\0', 1003 N_("Do not fold this symbol during ICF"), N_("SYMBOL")); 1004 1005 // l 1006 1007 DEFINE_special(library, options::TWO_DASHES, 'l', 1008 N_("Search for library LIBNAME"), N_("LIBNAME")); 1009 1010 DEFINE_bool(ld_generated_unwind_info, options::TWO_DASHES, '\0', true, 1011 N_("Generate unwind information for PLT"), 1012 N_("Do not generate unwind information for PLT")); 1013 1014 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L', 1015 N_("Add directory to search path"), N_("DIR")); 1016 1017 DEFINE_bool(long_plt, options::TWO_DASHES, '\0', false, 1018 N_("(ARM only) Generate long PLT entries"), 1019 N_("(ARM only) Do not generate long PLT entries")); 1020 1021 // m 1022 1023 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "", 1024 N_("Set GNU linker emulation; obsolete"), N_("EMULATION")); 1025 1026 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0', 1027 sizeof(void*) >= 8, 1028 N_("Map whole files to memory"), 1029 N_("Map relevant file parts to memory")); 1030 1031 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true, 1032 N_("(ARM only) Merge exidx entries in debuginfo"), 1033 N_("(ARM only) Do not merge exidx entries in debuginfo")); 1034 1035 DEFINE_bool(mmap_output_file, options::TWO_DASHES, '\0', true, 1036 N_("Map the output file for writing"), 1037 N_("Do not map the output file for writing")); 1038 1039 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false, 1040 N_("Write map file on standard output"), NULL); 1041 1042 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"), 1043 N_("MAPFILENAME")); 1044 1045 // n 1046 1047 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false, 1048 N_("Do not page align data"), NULL); 1049 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false, 1050 N_("Do not page align data, do not make text readonly"), 1051 N_("Page align data, make text readonly")); 1052 1053 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false, 1054 N_("Use less memory and more disk I/O " 1055 "(included only for compatibility with GNU ld)"), NULL); 1056 1057 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0', 1058 N_("Report undefined symbols (even with --shared)"), 1059 NULL, false); 1060 1061 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false, 1062 N_("Create an output file even if errors occur"), NULL); 1063 1064 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false, 1065 N_("Only search directories specified on the command line"), 1066 NULL); 1067 1068 // o 1069 1070 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out", 1071 N_("Set output file name"), N_("FILE")); 1072 1073 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf", 1074 N_("Set output format"), N_("[binary]")); 1075 1076 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0, 1077 N_("Optimize output file size"), N_("LEVEL")); 1078 1079 DEFINE_enum(orphan_handling, options::TWO_DASHES, '\0', "place", 1080 N_("Orphan section handling"), N_("[place,discard,warn,error]"), 1081 {"place", "discard", "warn", "error"}); 1082 1083 // p 1084 1085 DEFINE_bool(p, options::ONE_DASH, 'p', false, 1086 N_("Ignored for ARM compatibility"), NULL); 1087 1088 DEFINE_bool(pie, options::ONE_DASH, '\0', false, 1089 N_("Create a position independent executable"), 1090 N_("Do not create a position independent executable")); 1091 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0', 1092 N_("Create a position independent executable"), 1093 N_("Do not create a position independent executable"), 1094 false); 1095 1096 DEFINE_bool(pic_veneer, options::TWO_DASHES, '\0', false, 1097 N_("Force PIC sequences for ARM/Thumb interworking veneers"), 1098 NULL); 1099 1100 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false, 1101 NULL, N_("(ARM only) Ignore for backward compatibility")); 1102 1103 DEFINE_var(plt_align, options::TWO_DASHES, '\0', 0, "5", 1104 N_("(PowerPC64 only) Align PLT call stubs to fit cache lines"), 1105 N_("[=P2ALIGN]"), true, int, int, options::parse_uint, false); 1106 1107 DEFINE_bool(plt_static_chain, options::TWO_DASHES, '\0', false, 1108 N_("(PowerPC64 only) PLT call stubs should load r11"), 1109 N_("(PowerPC64 only) PLT call stubs should not load r11")); 1110 1111 DEFINE_bool(plt_thread_safe, options::TWO_DASHES, '\0', false, 1112 N_("(PowerPC64 only) PLT call stubs with load-load barrier"), 1113 N_("(PowerPC64 only) PLT call stubs without barrier")); 1114 1115#ifdef ENABLE_PLUGINS 1116 DEFINE_special(plugin, options::TWO_DASHES, '\0', 1117 N_("Load a plugin library"), N_("PLUGIN")); 1118 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0', 1119 N_("Pass an option to the plugin"), N_("OPTION")); 1120#endif 1121 1122 DEFINE_bool(posix_fallocate, options::TWO_DASHES, '\0', true, 1123 N_("Use posix_fallocate to reserve space in the output file"), 1124 N_("Use fallocate or ftruncate to reserve space")); 1125 1126 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false, 1127 N_("Preread archive symbols when multi-threaded"), NULL); 1128 1129 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false, 1130 N_("List removed unused sections on stderr"), 1131 N_("Do not list removed unused sections")); 1132 1133 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false, 1134 N_("List folded identical sections on stderr"), 1135 N_("Do not list folded identical sections")); 1136 1137 DEFINE_bool(print_output_format, options::TWO_DASHES, '\0', false, 1138 N_("Print default output format"), NULL); 1139 1140 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL, 1141 N_("Print symbols defined and used for each input"), 1142 N_("FILENAME")); 1143 1144 DEFINE_special(push_state, options::TWO_DASHES, '\0', 1145 N_("Save the state of flags related to input files"), NULL); 1146 DEFINE_special(pop_state, options::TWO_DASHES, '\0', 1147 N_("Restore the state of flags related to input files"), NULL); 1148 1149 // q 1150 1151 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false, 1152 N_("Generate relocations in output"), NULL); 1153 1154 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false, 1155 N_("Ignored for SVR4 compatibility"), NULL); 1156 1157 // r 1158 1159 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false, 1160 N_("Generate relocatable output"), NULL); 1161 1162 DEFINE_bool(relax, options::TWO_DASHES, '\0', false, 1163 N_("Relax branches on certain targets"), NULL); 1164 1165 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL, 1166 N_("keep only symbols listed in this file"), N_("FILE")); 1167 1168 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false, 1169 N_("Put read-only non-executable sections in their own segment"), 1170 NULL); 1171 1172 DEFINE_uint64(rosegment_gap, options::TWO_DASHES, '\0', -1U, 1173 N_("Set offset between executable and read-only segments"), 1174 N_("OFFSET")); 1175 1176 // -R really means -rpath, but can mean --just-symbols for 1177 // compatibility with GNU ld. -rpath is always -rpath, so we list 1178 // it separately. 1179 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R', 1180 N_("Add DIR to runtime search path"), N_("DIR")); 1181 1182 DEFINE_dirlist(rpath, options::ONE_DASH, '\0', 1183 N_("Add DIR to runtime search path"), N_("DIR")); 1184 1185 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0', 1186 N_("Add DIR to link time shared library search path"), 1187 N_("DIR")); 1188 1189 // s 1190 1191 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false, 1192 N_("Strip all symbols"), NULL); 1193 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false, 1194 N_("Strip debugging information"), NULL); 1195 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false, 1196 N_("Emit only debug line number information"), NULL); 1197 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false, 1198 N_("Strip debug symbols that are unused by gdb " 1199 "(at least versions <= 7.4)"), NULL); 1200 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true, 1201 N_("Strip LTO intermediate code sections"), NULL); 1202 1203 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL, 1204 N_("Layout sections in the order specified"), 1205 N_("FILENAME")); 1206 1207 DEFINE_special(section_start, options::TWO_DASHES, '\0', 1208 N_("Set address of section"), N_("SECTION=ADDRESS")); 1209 1210 DEFINE_bool(secure_plt, options::TWO_DASHES , '\0', true, 1211 N_("(PowerPC only) Use new-style PLT"), NULL); 1212 1213 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL, 1214 N_("Sort common symbols by alignment"), 1215 N_("[={ascending,descending}]")); 1216 1217 DEFINE_enum(sort_section, options::TWO_DASHES, '\0', "none", 1218 N_("Sort sections by name. \'--no-text-reorder\'" 1219 " will override \'--sort-section=name\' for .text"), 1220 N_("[none,name]"), 1221 {"none", "name"}); 1222 1223 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5, 1224 N_("Dynamic tag slots to reserve (default 5)"), 1225 N_("COUNT")); 1226 1227 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1, 1228 N_("(ARM, PowerPC only) The maximum distance from instructions " 1229 "in a group of sections to their stubs. Negative values mean " 1230 "stubs are always after the group. 1 means use default size"), 1231 N_("SIZE")); 1232 1233 DEFINE_bool(stub_group_multi, options::TWO_DASHES, '\0', false, 1234 N_("(PowerPC only) Allow a group of stubs to serve multiple " 1235 "output sections"), NULL); 1236 1237 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000, 1238 N_("Stack size when -fsplit-stack function calls non-split"), 1239 N_("SIZE")); 1240 1241 // This is not actually special in any way, but I need to give it 1242 // a non-standard accessor-function name because 'static' is a keyword. 1243 DEFINE_special(static, options::ONE_DASH, '\0', 1244 N_("Do not link against shared libraries"), NULL); 1245 1246 DEFINE_special(start_lib, options::TWO_DASHES, '\0', 1247 N_("Start a library"), NULL); 1248 DEFINE_special(end_lib, options::TWO_DASHES, '\0', 1249 N_("End a library "), NULL); 1250 1251 DEFINE_bool(stats, options::TWO_DASHES, '\0', false, 1252 N_("Print resource usage statistics"), NULL); 1253 1254 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "", 1255 N_("Set target system root directory"), N_("DIR")); 1256 1257 // t 1258 1259 DEFINE_bool(trace, options::TWO_DASHES, 't', false, 1260 N_("Print the name of each input file"), NULL); 1261 1262 DEFINE_bool(target1_abs, options::TWO_DASHES, '\0', false, 1263 N_("(ARM only) Force R_ARM_TARGET1 type to R_ARM_ABS32"), 1264 NULL); 1265 DEFINE_bool(target1_rel, options::TWO_DASHES, '\0', false, 1266 N_("(ARM only) Force R_ARM_TARGET1 type to R_ARM_REL32"), 1267 NULL); 1268 DEFINE_enum(target2, options::TWO_DASHES, '\0', NULL, 1269 N_("(ARM only) Set R_ARM_TARGET2 relocation type"), 1270 N_("[rel, abs, got-rel"), 1271 {"rel", "abs", "got-rel"}); 1272 1273 DEFINE_bool(text_reorder, options::TWO_DASHES, '\0', true, 1274 N_("Enable text section reordering for GCC section names"), 1275 N_("Disable text section reordering for GCC section names")); 1276 1277 DEFINE_bool(threads, options::TWO_DASHES, '\0', false, 1278 N_("Run the linker multi-threaded"), 1279 N_("Do not run the linker multi-threaded")); 1280 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0, 1281 N_("Number of threads to use"), N_("COUNT")); 1282 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0, 1283 N_("Number of threads to use in initial pass"), N_("COUNT")); 1284 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0, 1285 N_("Number of threads to use in middle pass"), N_("COUNT")); 1286 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0, 1287 N_("Number of threads to use in final pass"), N_("COUNT")); 1288 1289 DEFINE_bool(toc_optimize, options::TWO_DASHES, '\0', true, 1290 N_("(PowerPC64 only) Optimize TOC code sequences"), 1291 N_("(PowerPC64 only) Don't optimize TOC code sequences")); 1292 1293 DEFINE_bool(toc_sort, options::TWO_DASHES, '\0', true, 1294 N_("(PowerPC64 only) Sort TOC and GOT sections"), 1295 N_("(PowerPC64 only) Don't sort TOC and GOT sections")); 1296 1297 DEFINE_special(script, options::TWO_DASHES, 'T', 1298 N_("Read linker script"), N_("FILE")); 1299 1300 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U, 1301 N_("Set the address of the bss segment"), N_("ADDRESS")); 1302 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U, 1303 N_("Set the address of the data segment"), N_("ADDRESS")); 1304 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U, 1305 N_("Set the address of the text segment"), N_("ADDRESS")); 1306 DEFINE_uint64_alias(Ttext_segment, Ttext, options::ONE_DASH, '\0', 1307 N_("Set the address of the text segment"), 1308 N_("ADDRESS")); 1309 DEFINE_uint64(Trodata_segment, options::ONE_DASH, '\0', -1U, 1310 N_("Set the address of the rodata segment"), N_("ADDRESS")); 1311 1312 // u 1313 1314 DEFINE_set(undefined, options::TWO_DASHES, 'u', 1315 N_("Create undefined reference to SYMBOL"), N_("SYMBOL")); 1316 1317 DEFINE_enum(unresolved_symbols, options::TWO_DASHES, '\0', NULL, 1318 N_("How to handle unresolved symbols"), 1319 ("ignore-all,report-all,ignore-in-object-files," 1320 "ignore-in-shared-libs"), 1321 {"ignore-all", "report-all", "ignore-in-object-files", 1322 "ignore-in-shared-libs"}); 1323 1324 // v 1325 1326 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false, 1327 N_("Alias for --debug=files"), NULL); 1328 1329 DEFINE_special(version_script, options::TWO_DASHES, '\0', 1330 N_("Read version script"), N_("FILE")); 1331 1332 // w 1333 1334 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false, 1335 N_("Warn about duplicate common symbols"), 1336 N_("Do not warn about duplicate common symbols")); 1337 1338 DEFINE_bool_ignore(warn_constructors, options::TWO_DASHES, '\0', 1339 N_("Ignored"), N_("Ignored")); 1340 1341 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false, 1342 N_("Warn if the stack is executable"), 1343 N_("Do not warn if the stack is executable")); 1344 1345 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true, 1346 NULL, N_("Don't warn about mismatched input files")); 1347 1348 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false, 1349 N_("Ignored"), NULL); 1350 1351 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true, 1352 N_("Warn when skipping an incompatible library"), 1353 N_("Don't warn when skipping an incompatible library")); 1354 1355 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false, 1356 N_("Warn if text segment is not shareable"), 1357 N_("Do not warn if text segment is not shareable")); 1358 1359 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false, 1360 N_("Report unresolved symbols as warnings"), 1361 NULL); 1362 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols, 1363 options::TWO_DASHES, '\0', 1364 N_("Report unresolved symbols as errors"), 1365 NULL, true); 1366 1367 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL, 1368 N_("(ARM only) Do not warn about objects with incompatible " 1369 "wchar_t sizes")); 1370 1371 DEFINE_bool(weak_unresolved_symbols, options::TWO_DASHES, '\0', false, 1372 N_("Convert unresolved symbols to weak references"), 1373 NULL); 1374 1375 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false, 1376 N_("Include all archive contents"), 1377 N_("Include only needed archive contents")); 1378 1379 DEFINE_set(wrap, options::TWO_DASHES, '\0', 1380 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL")); 1381 1382 // x 1383 1384 DEFINE_special(discard_all, options::TWO_DASHES, 'x', 1385 N_("Delete all local symbols"), NULL); 1386 DEFINE_special(discard_locals, options::TWO_DASHES, 'X', 1387 N_("Delete all temporary local symbols"), NULL); 1388 DEFINE_special(discard_none, options::TWO_DASHES, '\0', 1389 N_("Keep all local symbols"), NULL); 1390 1391 // y 1392 1393 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y', 1394 N_("Trace references to symbol"), N_("SYMBOL")); 1395 1396 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true, 1397 N_("Allow unused version in script"), 1398 N_("Do not allow unused version in script")); 1399 1400 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "", 1401 N_("Default search path for Solaris compatibility"), 1402 N_("PATH")); 1403 1404 // special characters 1405 1406 DEFINE_special(start_group, options::TWO_DASHES, '(', 1407 N_("Start a library search group"), NULL); 1408 DEFINE_special(end_group, options::TWO_DASHES, ')', 1409 N_("End a library search group"), NULL); 1410 1411 // The -z options. 1412 1413 DEFINE_bool(bndplt, options::DASH_Z, '\0', false, 1414 N_("(x86-64 only) Generate a BND PLT for Intel MPX"), 1415 N_("Generate a regular PLT")); 1416 DEFINE_bool(combreloc, options::DASH_Z, '\0', true, 1417 N_("Sort dynamic relocs"), 1418 N_("Do not sort dynamic relocs")); 1419 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0, 1420 N_("Set common page size to SIZE"), N_("SIZE")); 1421 DEFINE_bool(defs, options::DASH_Z, '\0', false, 1422 N_("Report undefined symbols (even with --shared)"), 1423 NULL); 1424 DEFINE_bool(execstack, options::DASH_Z, '\0', false, 1425 N_("Mark output as requiring executable stack"), NULL); 1426 DEFINE_bool(global, options::DASH_Z, '\0', false, 1427 N_("Make symbols in DSO available for subsequently loaded " 1428 "objects"), NULL); 1429 DEFINE_bool(initfirst, options::DASH_Z, '\0', false, 1430 N_("Mark DSO to be initialized first at runtime"), 1431 NULL); 1432 DEFINE_bool(interpose, options::DASH_Z, '\0', false, 1433 N_("Mark object to interpose all DSOs but executable"), 1434 NULL); 1435 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0', 1436 N_("Mark object for lazy runtime binding"), 1437 NULL, true); 1438 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false, 1439 N_("Mark object requiring immediate process"), 1440 NULL); 1441 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0, 1442 N_("Set maximum page size to SIZE"), N_("SIZE")); 1443 DEFINE_bool(muldefs, options::DASH_Z, '\0', false, 1444 N_("Allow multiple definitions of symbols"), 1445 NULL); 1446 // copyreloc is here in the list because there is only -z 1447 // nocopyreloc, not -z copyreloc. 1448 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true, 1449 NULL, 1450 N_("Do not create copy relocs")); 1451 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false, 1452 N_("Mark object not to use default search paths"), 1453 NULL); 1454 DEFINE_bool(nodelete, options::DASH_Z, '\0', false, 1455 N_("Mark DSO non-deletable at runtime"), 1456 NULL); 1457 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false, 1458 N_("Mark DSO not available to dlopen"), 1459 NULL); 1460 DEFINE_bool(nodump, options::DASH_Z, '\0', false, 1461 N_("Mark DSO not available to dldump"), 1462 NULL); 1463 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false, 1464 N_("Mark output as not requiring executable stack"), NULL); 1465 DEFINE_bool(now, options::DASH_Z, '\0', false, 1466 N_("Mark object for immediate function binding"), 1467 NULL); 1468 DEFINE_bool(origin, options::DASH_Z, '\0', false, 1469 N_("Mark DSO to indicate that needs immediate $ORIGIN " 1470 "processing at runtime"), NULL); 1471 DEFINE_bool(relro, options::DASH_Z, '\0', DEFAULT_LD_Z_RELRO, 1472 N_("Where possible mark variables read-only after relocation"), 1473 N_("Don't mark variables read-only after relocation")); 1474 DEFINE_uint64(stack_size, options::DASH_Z, '\0', 0, 1475 N_("Set PT_GNU_STACK segment p_memsz to SIZE"), N_("SIZE")); 1476 DEFINE_bool(text, options::DASH_Z, '\0', false, 1477 N_("Do not permit relocations in read-only segments"), 1478 N_("Permit relocations in read-only segments")); 1479 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0', 1480 N_("Permit relocations in read-only segments"), 1481 NULL, true); 1482 1483 public: 1484 typedef options::Dir_list Dir_list; 1485 1486 General_options(); 1487 1488 // Does post-processing on flags, making sure they all have 1489 // non-conflicting values. Also converts some flags from their 1490 // "standard" types (string, etc), to another type (enum, DirList), 1491 // which can be accessed via a separate method. Dies if it notices 1492 // any problems. 1493 void finalize(); 1494 1495 // True if we printed the version information. 1496 bool 1497 printed_version() const 1498 { return this->printed_version_; } 1499 1500 // The macro defines output() (based on --output), but that's a 1501 // generic name. Provide this alternative name, which is clearer. 1502 const char* 1503 output_file_name() const 1504 { return this->output(); } 1505 1506 // This is not defined via a flag, but combines flags to say whether 1507 // the output is position-independent or not. 1508 bool 1509 output_is_position_independent() const 1510 { return this->shared() || this->pie(); } 1511 1512 // Return true if the output is something that can be exec()ed, such 1513 // as a static executable, or a position-dependent or 1514 // position-independent executable, but not a dynamic library or an 1515 // object file. 1516 bool 1517 output_is_executable() const 1518 { return !this->shared() && !this->relocatable(); } 1519 1520 // This would normally be static(), and defined automatically, but 1521 // since static is a keyword, we need to come up with our own name. 1522 bool 1523 is_static() const 1524 { return static_; } 1525 1526 // In addition to getting the input and output formats as a string 1527 // (via format() and oformat()), we also give access as an enum. 1528 enum Object_format 1529 { 1530 // Ordinary ELF. 1531 OBJECT_FORMAT_ELF, 1532 // Straight binary format. 1533 OBJECT_FORMAT_BINARY 1534 }; 1535 1536 // Convert a string to an Object_format. Gives an error if the 1537 // string is not recognized. 1538 static Object_format 1539 string_to_object_format(const char* arg); 1540 1541 // Convert an Object_format to string. 1542 static const char* 1543 object_format_to_string(Object_format); 1544 1545 // Note: these functions are not very fast. 1546 Object_format format_enum() const; 1547 Object_format oformat_enum() const; 1548 1549 // Return whether FILENAME is in a system directory. 1550 bool 1551 is_in_system_directory(const std::string& name) const; 1552 1553 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_. 1554 bool 1555 should_retain_symbol(const char* symbol_name) const 1556 { 1557 if (symbols_to_retain_.empty()) // means flag wasn't specified 1558 return true; 1559 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end(); 1560 } 1561 1562 // These are the best way to get access to the execstack state, 1563 // not execstack() and noexecstack() which are hard to use properly. 1564 bool 1565 is_execstack_set() const 1566 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; } 1567 1568 bool 1569 is_stack_executable() const 1570 { return this->execstack_status_ == EXECSTACK_YES; } 1571 1572 bool 1573 icf_enabled() const 1574 { return this->icf_status_ != ICF_NONE; } 1575 1576 bool 1577 icf_safe_folding() const 1578 { return this->icf_status_ == ICF_SAFE; } 1579 1580 // The --demangle option takes an optional string, and there is also 1581 // a --no-demangle option. This is the best way to decide whether 1582 // to demangle or not. 1583 bool 1584 do_demangle() const 1585 { return this->do_demangle_; } 1586 1587 // Returns TRUE if any plugin libraries have been loaded. 1588 bool 1589 has_plugins() const 1590 { return this->plugins_ != NULL; } 1591 1592 // Return a pointer to the plugin manager. 1593 Plugin_manager* 1594 plugins() const 1595 { return this->plugins_; } 1596 1597 // True iff SYMBOL was found in the file specified by dynamic-list. 1598 bool 1599 in_dynamic_list(const char* symbol) const 1600 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); } 1601 1602 // True if a --dynamic-list script was provided. 1603 bool 1604 have_dynamic_list() const 1605 { return this->have_dynamic_list_; } 1606 1607 // Finalize the dynamic list. 1608 void 1609 finalize_dynamic_list() 1610 { this->dynamic_list_.version_script_info()->finalize(); } 1611 1612 // The mode selected by the --incremental options. 1613 enum Incremental_mode 1614 { 1615 // No incremental linking (--no-incremental). 1616 INCREMENTAL_OFF, 1617 // Incremental update only (--incremental-update). 1618 INCREMENTAL_UPDATE, 1619 // Force a full link, but prepare for subsequent incremental link 1620 // (--incremental-full). 1621 INCREMENTAL_FULL, 1622 // Incremental update if possible, fallback to full link (--incremental). 1623 INCREMENTAL_AUTO 1624 }; 1625 1626 // The incremental linking mode. 1627 Incremental_mode 1628 incremental_mode() const 1629 { return this->incremental_mode_; } 1630 1631 // The disposition given by the --incremental-changed, 1632 // --incremental-unchanged or --incremental-unknown option. The 1633 // value may change as we proceed parsing the command line flags. 1634 Incremental_disposition 1635 incremental_disposition() const 1636 { return this->incremental_disposition_; } 1637 1638 void 1639 set_incremental_disposition(Incremental_disposition disp) 1640 { this->incremental_disposition_ = disp; } 1641 1642 // The disposition to use for startup files (those that precede the 1643 // first --incremental-changed, etc. option). 1644 Incremental_disposition 1645 incremental_startup_disposition() const 1646 { return this->incremental_startup_disposition_; } 1647 1648 // Return true if S is the name of a library excluded from automatic 1649 // symbol export. 1650 bool 1651 check_excluded_libs(const std::string &s) const; 1652 1653 // If an explicit start address was given for section SECNAME with 1654 // the --section-start option, return true and set *PADDR to the 1655 // address. Otherwise return false. 1656 bool 1657 section_start(const char* secname, uint64_t* paddr) const; 1658 1659 // Return whether any --section-start option was used. 1660 bool 1661 any_section_start() const 1662 { return !this->section_starts_.empty(); } 1663 1664 enum Fix_v4bx 1665 { 1666 // Leave original instruction. 1667 FIX_V4BX_NONE, 1668 // Replace instruction. 1669 FIX_V4BX_REPLACE, 1670 // Generate an interworking veneer. 1671 FIX_V4BX_INTERWORKING 1672 }; 1673 1674 Fix_v4bx 1675 fix_v4bx() const 1676 { return (this->fix_v4bx_); } 1677 1678 enum Endianness 1679 { 1680 ENDIANNESS_NOT_SET, 1681 ENDIANNESS_BIG, 1682 ENDIANNESS_LITTLE 1683 }; 1684 1685 Endianness 1686 endianness() const 1687 { return this->endianness_; } 1688 1689 bool 1690 discard_all() const 1691 { return this->discard_locals_ == DISCARD_ALL; } 1692 1693 bool 1694 discard_locals() const 1695 { return this->discard_locals_ == DISCARD_LOCALS; } 1696 1697 bool 1698 discard_sec_merge() const 1699 { return this->discard_locals_ == DISCARD_SEC_MERGE; } 1700 1701 enum Orphan_handling 1702 { 1703 // Place orphan sections normally (default). 1704 ORPHAN_PLACE, 1705 // Discard all orphan sections. 1706 ORPHAN_DISCARD, 1707 // Warn when placing orphan sections. 1708 ORPHAN_WARN, 1709 // Issue error for orphan sections. 1710 ORPHAN_ERROR 1711 }; 1712 1713 Orphan_handling 1714 orphan_handling_enum() const 1715 { return this->orphan_handling_enum_; } 1716 1717 private: 1718 // Don't copy this structure. 1719 General_options(const General_options&); 1720 General_options& operator=(const General_options&); 1721 1722 // What local symbols to discard. 1723 enum Discard_locals 1724 { 1725 // Locals in merge sections (default). 1726 DISCARD_SEC_MERGE, 1727 // None (--discard-none). 1728 DISCARD_NONE, 1729 // Temporary locals (--discard-locals/-X). 1730 DISCARD_LOCALS, 1731 // All locals (--discard-all/-x). 1732 DISCARD_ALL 1733 }; 1734 1735 // Whether to mark the stack as executable. 1736 enum Execstack 1737 { 1738 // Not set on command line. 1739 EXECSTACK_FROM_INPUT, 1740 // Mark the stack as executable (-z execstack). 1741 EXECSTACK_YES, 1742 // Mark the stack as not executable (-z noexecstack). 1743 EXECSTACK_NO 1744 }; 1745 1746 enum Icf_status 1747 { 1748 // Do not fold any functions (Default or --icf=none). 1749 ICF_NONE, 1750 // All functions are candidates for folding. (--icf=all). 1751 ICF_ALL, 1752 // Only ctors and dtors are candidates for folding. (--icf=safe). 1753 ICF_SAFE 1754 }; 1755 1756 void 1757 set_icf_status(Icf_status value) 1758 { this->icf_status_ = value; } 1759 1760 void 1761 set_execstack_status(Execstack value) 1762 { this->execstack_status_ = value; } 1763 1764 void 1765 set_do_demangle(bool value) 1766 { this->do_demangle_ = value; } 1767 1768 void 1769 set_static(bool value) 1770 { static_ = value; } 1771 1772 void 1773 set_orphan_handling_enum(Orphan_handling value) 1774 { this->orphan_handling_enum_ = value; } 1775 1776 // These are called by finalize() to set up the search-path correctly. 1777 void 1778 add_to_library_path_with_sysroot(const std::string& arg) 1779 { this->add_search_directory_to_library_path(Search_directory(arg, true)); } 1780 1781 // Apply any sysroot to the directory lists. 1782 void 1783 add_sysroot(); 1784 1785 // Add a plugin and its arguments to the list of plugins. 1786 void 1787 add_plugin(const char* filename); 1788 1789 // Add a plugin option. 1790 void 1791 add_plugin_option(const char* opt); 1792 1793 void 1794 copy_from_posdep_options(const Position_dependent_options&); 1795 1796 // Whether we printed version information. 1797 bool printed_version_; 1798 // Whether to mark the stack as executable. 1799 Execstack execstack_status_; 1800 // Whether to do code folding. 1801 Icf_status icf_status_; 1802 // Whether to do a static link. 1803 bool static_; 1804 // Whether to do demangling. 1805 bool do_demangle_; 1806 // List of plugin libraries. 1807 Plugin_manager* plugins_; 1808 // The parsed output of --dynamic-list files. For convenience in 1809 // script.cc, we store this as a Script_options object, even though 1810 // we only use a single Version_tree from it. 1811 Script_options dynamic_list_; 1812 // Whether a --dynamic-list file was provided. 1813 bool have_dynamic_list_; 1814 // The incremental linking mode. 1815 Incremental_mode incremental_mode_; 1816 // The disposition given by the --incremental-changed, 1817 // --incremental-unchanged or --incremental-unknown option. The 1818 // value may change as we proceed parsing the command line flags. 1819 Incremental_disposition incremental_disposition_; 1820 // The disposition to use for startup files (those marked 1821 // INCREMENTAL_STARTUP). 1822 Incremental_disposition incremental_startup_disposition_; 1823 // Whether we have seen one of the options that require incremental 1824 // build (--incremental-changed, --incremental-unchanged, 1825 // --incremental-unknown, or --incremental-startup-unchanged). 1826 bool implicit_incremental_; 1827 // Libraries excluded from automatic export, via --exclude-libs. 1828 Unordered_set<std::string> excluded_libs_; 1829 // List of symbol-names to keep, via -retain-symbol-info. 1830 Unordered_set<std::string> symbols_to_retain_; 1831 // Map from section name to address from --section-start. 1832 std::map<std::string, uint64_t> section_starts_; 1833 // Whether to process armv4 bx instruction relocation. 1834 Fix_v4bx fix_v4bx_; 1835 // Endianness. 1836 Endianness endianness_; 1837 // What local symbols to discard. 1838 Discard_locals discard_locals_; 1839 // Stack of saved options for --push-state/--pop-state. 1840 std::vector<Position_dependent_options*> options_stack_; 1841 // Orphan handling option, decoded to an enum value. 1842 Orphan_handling orphan_handling_enum_; 1843}; 1844 1845// The position-dependent options. We use this to store the state of 1846// the commandline at a particular point in parsing for later 1847// reference. For instance, if we see "ld --whole-archive foo.a 1848// --no-whole-archive," we want to store the whole-archive option with 1849// foo.a, so when the time comes to parse foo.a we know we should do 1850// it in whole-archive mode. We could store all of General_options, 1851// but that's big, so we just pick the subset of flags that actually 1852// change in a position-dependent way. 1853 1854#define DEFINE_posdep(varname__, type__) \ 1855 public: \ 1856 type__ \ 1857 varname__() const \ 1858 { return this->varname__##_; } \ 1859 \ 1860 void \ 1861 set_##varname__(type__ value) \ 1862 { this->varname__##_ = value; } \ 1863 private: \ 1864 type__ varname__##_ 1865 1866class Position_dependent_options 1867{ 1868 public: 1869 Position_dependent_options(const General_options& options 1870 = Position_dependent_options::default_options_) 1871 { copy_from_options(options); } 1872 1873 void 1874 copy_from_options(const General_options& options) 1875 { 1876 this->set_as_needed(options.as_needed()); 1877 this->set_Bdynamic(options.Bdynamic()); 1878 this->set_format_enum(options.format_enum()); 1879 this->set_whole_archive(options.whole_archive()); 1880 this->set_incremental_disposition(options.incremental_disposition()); 1881 } 1882 1883 DEFINE_posdep(as_needed, bool); 1884 DEFINE_posdep(Bdynamic, bool); 1885 DEFINE_posdep(format_enum, General_options::Object_format); 1886 DEFINE_posdep(whole_archive, bool); 1887 DEFINE_posdep(incremental_disposition, Incremental_disposition); 1888 1889 private: 1890 // This is a General_options with everything set to its default 1891 // value. A Position_dependent_options created with no argument 1892 // will take its values from here. 1893 static General_options default_options_; 1894}; 1895 1896 1897// A single file or library argument from the command line. 1898 1899class Input_file_argument 1900{ 1901 public: 1902 enum Input_file_type 1903 { 1904 // A regular file, name used as-is, not searched. 1905 INPUT_FILE_TYPE_FILE, 1906 // A library name. When used, "lib" will be prepended and ".so" or 1907 // ".a" appended to make a filename, and that filename will be searched 1908 // for using the -L paths. 1909 INPUT_FILE_TYPE_LIBRARY, 1910 // A regular file, name used as-is, but searched using the -L paths. 1911 INPUT_FILE_TYPE_SEARCHED_FILE 1912 }; 1913 1914 // name: file name or library name 1915 // type: the type of this input file. 1916 // extra_search_path: an extra directory to look for the file, prior 1917 // to checking the normal library search path. If this is "", 1918 // then no extra directory is added. 1919 // just_symbols: whether this file only defines symbols. 1920 // options: The position dependent options at this point in the 1921 // command line, such as --whole-archive. 1922 Input_file_argument() 1923 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""), 1924 just_symbols_(false), options_(), arg_serial_(0) 1925 { } 1926 1927 Input_file_argument(const char* name, Input_file_type type, 1928 const char* extra_search_path, 1929 bool just_symbols, 1930 const Position_dependent_options& options) 1931 : name_(name), type_(type), extra_search_path_(extra_search_path), 1932 just_symbols_(just_symbols), options_(options), arg_serial_(0) 1933 { } 1934 1935 // You can also pass in a General_options instance instead of a 1936 // Position_dependent_options. In that case, we extract the 1937 // position-independent vars from the General_options and only store 1938 // those. 1939 Input_file_argument(const char* name, Input_file_type type, 1940 const char* extra_search_path, 1941 bool just_symbols, 1942 const General_options& options) 1943 : name_(name), type_(type), extra_search_path_(extra_search_path), 1944 just_symbols_(just_symbols), options_(options), arg_serial_(0) 1945 { } 1946 1947 const char* 1948 name() const 1949 { return this->name_.c_str(); } 1950 1951 const Position_dependent_options& 1952 options() const 1953 { return this->options_; } 1954 1955 bool 1956 is_lib() const 1957 { return type_ == INPUT_FILE_TYPE_LIBRARY; } 1958 1959 bool 1960 is_searched_file() const 1961 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; } 1962 1963 const char* 1964 extra_search_path() const 1965 { 1966 return (this->extra_search_path_.empty() 1967 ? NULL 1968 : this->extra_search_path_.c_str()); 1969 } 1970 1971 // Return whether we should only read symbols from this file. 1972 bool 1973 just_symbols() const 1974 { return this->just_symbols_; } 1975 1976 // Return whether this file may require a search using the -L 1977 // options. 1978 bool 1979 may_need_search() const 1980 { 1981 return (this->is_lib() 1982 || this->is_searched_file() 1983 || !this->extra_search_path_.empty()); 1984 } 1985 1986 // Set the serial number for this argument. 1987 void 1988 set_arg_serial(unsigned int arg_serial) 1989 { this->arg_serial_ = arg_serial; } 1990 1991 // Get the serial number. 1992 unsigned int 1993 arg_serial() const 1994 { return this->arg_serial_; } 1995 1996 private: 1997 // We use std::string, not const char*, here for convenience when 1998 // using script files, so that we do not have to preserve the string 1999 // in that case. 2000 std::string name_; 2001 Input_file_type type_; 2002 std::string extra_search_path_; 2003 bool just_symbols_; 2004 Position_dependent_options options_; 2005 // A unique index for this file argument in the argument list. 2006 unsigned int arg_serial_; 2007}; 2008 2009// A file or library, or a group, from the command line. 2010 2011class Input_argument 2012{ 2013 public: 2014 // Create a file or library argument. 2015 explicit Input_argument(Input_file_argument file) 2016 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL) 2017 { } 2018 2019 // Create a group argument. 2020 explicit Input_argument(Input_file_group* group) 2021 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL) 2022 { } 2023 2024 // Create a lib argument. 2025 explicit Input_argument(Input_file_lib* lib) 2026 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL) 2027 { } 2028 2029 // Return whether this is a file. 2030 bool 2031 is_file() const 2032 { return this->is_file_; } 2033 2034 // Return whether this is a group. 2035 bool 2036 is_group() const 2037 { return !this->is_file_ && this->lib_ == NULL; } 2038 2039 // Return whether this is a lib. 2040 bool 2041 is_lib() const 2042 { return this->lib_ != NULL; } 2043 2044 // Return the information about the file. 2045 const Input_file_argument& 2046 file() const 2047 { 2048 gold_assert(this->is_file_); 2049 return this->file_; 2050 } 2051 2052 // Return the information about the group. 2053 const Input_file_group* 2054 group() const 2055 { 2056 gold_assert(!this->is_file_); 2057 return this->group_; 2058 } 2059 2060 Input_file_group* 2061 group() 2062 { 2063 gold_assert(!this->is_file_); 2064 return this->group_; 2065 } 2066 2067 // Return the information about the lib. 2068 const Input_file_lib* 2069 lib() const 2070 { 2071 gold_assert(!this->is_file_); 2072 gold_assert(this->lib_); 2073 return this->lib_; 2074 } 2075 2076 Input_file_lib* 2077 lib() 2078 { 2079 gold_assert(!this->is_file_); 2080 gold_assert(this->lib_); 2081 return this->lib_; 2082 } 2083 2084 // If a script generated this argument, store a pointer to the script info. 2085 // Currently used only for recording incremental link information. 2086 void 2087 set_script_info(Script_info* info) 2088 { this->script_info_ = info; } 2089 2090 Script_info* 2091 script_info() const 2092 { return this->script_info_; } 2093 2094 private: 2095 bool is_file_; 2096 Input_file_argument file_; 2097 Input_file_group* group_; 2098 Input_file_lib* lib_; 2099 Script_info* script_info_; 2100}; 2101 2102typedef std::vector<Input_argument> Input_argument_list; 2103 2104// A group from the command line. This is a set of arguments within 2105// --start-group ... --end-group. 2106 2107class Input_file_group 2108{ 2109 public: 2110 typedef Input_argument_list::const_iterator const_iterator; 2111 2112 Input_file_group() 2113 : files_() 2114 { } 2115 2116 // Add a file to the end of the group. 2117 Input_argument& 2118 add_file(const Input_file_argument& arg) 2119 { 2120 this->files_.push_back(Input_argument(arg)); 2121 return this->files_.back(); 2122 } 2123 2124 // Iterators to iterate over the group contents. 2125 2126 const_iterator 2127 begin() const 2128 { return this->files_.begin(); } 2129 2130 const_iterator 2131 end() const 2132 { return this->files_.end(); } 2133 2134 private: 2135 Input_argument_list files_; 2136}; 2137 2138// A lib from the command line. This is a set of arguments within 2139// --start-lib ... --end-lib. 2140 2141class Input_file_lib 2142{ 2143 public: 2144 typedef Input_argument_list::const_iterator const_iterator; 2145 2146 Input_file_lib(const Position_dependent_options& options) 2147 : files_(), options_(options) 2148 { } 2149 2150 // Add a file to the end of the lib. 2151 Input_argument& 2152 add_file(const Input_file_argument& arg) 2153 { 2154 this->files_.push_back(Input_argument(arg)); 2155 return this->files_.back(); 2156 } 2157 2158 const Position_dependent_options& 2159 options() const 2160 { return this->options_; } 2161 2162 // Iterators to iterate over the lib contents. 2163 2164 const_iterator 2165 begin() const 2166 { return this->files_.begin(); } 2167 2168 const_iterator 2169 end() const 2170 { return this->files_.end(); } 2171 2172 size_t 2173 size() const 2174 { return this->files_.size(); } 2175 2176 private: 2177 Input_argument_list files_; 2178 Position_dependent_options options_; 2179}; 2180 2181// A list of files from the command line or a script. 2182 2183class Input_arguments 2184{ 2185 public: 2186 typedef Input_argument_list::const_iterator const_iterator; 2187 2188 Input_arguments() 2189 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0) 2190 { } 2191 2192 // Add a file. 2193 Input_argument& 2194 add_file(Input_file_argument& arg); 2195 2196 // Start a group (the --start-group option). 2197 void 2198 start_group(); 2199 2200 // End a group (the --end-group option). 2201 void 2202 end_group(); 2203 2204 // Start a lib (the --start-lib option). 2205 void 2206 start_lib(const Position_dependent_options&); 2207 2208 // End a lib (the --end-lib option). 2209 void 2210 end_lib(); 2211 2212 // Return whether we are currently in a group. 2213 bool 2214 in_group() const 2215 { return this->in_group_; } 2216 2217 // Return whether we are currently in a lib. 2218 bool 2219 in_lib() const 2220 { return this->in_lib_; } 2221 2222 // The number of entries in the list. 2223 int 2224 size() const 2225 { return this->input_argument_list_.size(); } 2226 2227 // Iterators to iterate over the list of input files. 2228 2229 const_iterator 2230 begin() const 2231 { return this->input_argument_list_.begin(); } 2232 2233 const_iterator 2234 end() const 2235 { return this->input_argument_list_.end(); } 2236 2237 // Return whether the list is empty. 2238 bool 2239 empty() const 2240 { return this->input_argument_list_.empty(); } 2241 2242 // Return the number of input files. This may be larger than 2243 // input_argument_list_.size(), because of files that are part 2244 // of groups or libs. 2245 int 2246 number_of_input_files() const 2247 { return this->file_count_; } 2248 2249 private: 2250 Input_argument_list input_argument_list_; 2251 bool in_group_; 2252 bool in_lib_; 2253 unsigned int file_count_; 2254}; 2255 2256 2257// All the information read from the command line. These are held in 2258// three separate structs: one to hold the options (--foo), one to 2259// hold the filenames listed on the commandline, and one to hold 2260// linker script information. This third is not a subset of the other 2261// two because linker scripts can be specified either as options (via 2262// -T) or as a file. 2263 2264class Command_line 2265{ 2266 public: 2267 typedef Input_arguments::const_iterator const_iterator; 2268 2269 Command_line(); 2270 2271 // Process the command line options. This will exit with an 2272 // appropriate error message if an unrecognized option is seen. 2273 void 2274 process(int argc, const char** argv); 2275 2276 // Process one command-line option. This takes the index of argv to 2277 // process, and returns the index for the next option. no_more_options 2278 // is set to true if argv[i] is "--". 2279 int 2280 process_one_option(int argc, const char** argv, int i, 2281 bool* no_more_options); 2282 2283 // Get the general options. 2284 const General_options& 2285 options() const 2286 { return this->options_; } 2287 2288 // Get the position dependent options. 2289 const Position_dependent_options& 2290 position_dependent_options() const 2291 { return this->position_options_; } 2292 2293 // Get the linker-script options. 2294 Script_options& 2295 script_options() 2296 { return this->script_options_; } 2297 2298 // Finalize the version-script options and return them. 2299 const Version_script_info& 2300 version_script(); 2301 2302 // Get the input files. 2303 Input_arguments& 2304 inputs() 2305 { return this->inputs_; } 2306 2307 // The number of input files. 2308 int 2309 number_of_input_files() const 2310 { return this->inputs_.number_of_input_files(); } 2311 2312 // Iterators to iterate over the list of input files. 2313 2314 const_iterator 2315 begin() const 2316 { return this->inputs_.begin(); } 2317 2318 const_iterator 2319 end() const 2320 { return this->inputs_.end(); } 2321 2322 private: 2323 Command_line(const Command_line&); 2324 Command_line& operator=(const Command_line&); 2325 2326 // This is a dummy class to provide a constructor that runs before 2327 // the constructor for the General_options. The Pre_options constructor 2328 // is used as a hook to set the flag enabling the options to register 2329 // themselves. 2330 struct Pre_options { 2331 Pre_options(); 2332 }; 2333 2334 // This must come before options_! 2335 Pre_options pre_options_; 2336 General_options options_; 2337 Position_dependent_options position_options_; 2338 Script_options script_options_; 2339 Input_arguments inputs_; 2340}; 2341 2342} // End namespace gold. 2343 2344#endif // !defined(GOLD_OPTIONS_H) 2345