1 // options.h -- handle command line options for gold -*- C++ -*- 2 3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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 // A One_option struct initializes itself with the global list of options 158 // at constructor time, so be careful making one of these. 159 struct One_option 160 { 161 std::string longname; 162 Dashes dashes; 163 char shortname; 164 const char* default_value; 165 const char* helpstring; 166 const char* helparg; 167 bool optional_arg; 168 Struct_var* reader; 169 170 One_option(const char* ln, Dashes d, char sn, const char* dv, 171 const char* hs, const char* ha, bool oa, Struct_var* r) 172 : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""), 173 helpstring(hs), helparg(ha), optional_arg(oa), reader(r) 174 { 175 // In longname, we convert all underscores to dashes, since GNU 176 // style uses dashes in option names. longname is likely to have 177 // underscores in it because it's also used to declare a C++ 178 // function. 179 const char* pos = strchr(this->longname.c_str(), '_'); 180 for (; pos; pos = strchr(pos, '_')) 181 this->longname[pos - this->longname.c_str()] = '-'; 182 183 // We only register ourselves if our helpstring is not NULL. This 184 // is to support the "no-VAR" boolean variables, which we 185 // conditionally turn on by defining "no-VAR" help text. 186 if (this->helpstring) 187 this->register_option(); 188 } 189 190 // This option takes an argument iff helparg is not NULL. 191 bool 192 takes_argument() const 193 { return this->helparg != NULL; } 194 195 // Whether the argument is optional. 196 bool 197 takes_optional_argument() const 198 { return this->optional_arg; } 199 200 // Register this option with the global list of options. 201 void 202 register_option(); 203 204 // Print this option to stdout (used with --help). 205 void 206 print() const; 207 }; 208 209 // All options have a Struct_##varname that inherits from this and 210 // actually implements parse_to_value for that option. 211 struct Struct_var 212 { 213 // OPTION: the name of the option as specified on the commandline, 214 // including leading dashes, and any text following the option: 215 // "-O", "--defsym=mysym=0x1000", etc. 216 // ARG: the arg associated with this option, or NULL if the option 217 // takes no argument: "2", "mysym=0x1000", etc. 218 // CMDLINE: the global Command_line object. Used by DEFINE_special. 219 // OPTIONS: the global General_options object. Used by DEFINE_special. 220 virtual void 221 parse_to_value(const char* option, const char* arg, 222 Command_line* cmdline, General_options* options) = 0; 223 virtual 224 ~Struct_var() // To make gcc happy. 225 { } 226 }; 227 228 // This is for "special" options that aren't of any predefined type. 229 struct Struct_special : public Struct_var 230 { 231 // If you change this, change the parse-fn in DEFINE_special as well. 232 typedef void (General_options::*Parse_function)(const char*, const char*, 233 Command_line*); 234 Struct_special(const char* varname, Dashes dashes, char shortname, 235 Parse_function parse_function, 236 const char* helpstring, const char* helparg) 237 : option(varname, dashes, shortname, "", helpstring, helparg, false, this), 238 parse(parse_function) 239 { } 240 241 void parse_to_value(const char* option, const char* arg, 242 Command_line* cmdline, General_options* options) 243 { (options->*(this->parse))(option, arg, cmdline); } 244 245 One_option option; 246 Parse_function parse; 247 }; 248 249 } // End namespace options. 250 251 252 // These are helper macros use by DEFINE_uint64/etc below. 253 // This macro is used inside the General_options_ class, so defines 254 // var() and set_var() as General_options methods. Arguments as are 255 // for the constructor for One_option. param_type__ is the same as 256 // type__ for built-in types, and "const type__ &" otherwise. 257 // 258 // When we define the linker command option "assert", the macro argument 259 // varname__ of DEFINE_var below will be replaced by "assert". On Mac OSX 260 // assert.h is included implicitly by one of the library headers we use. To 261 // avoid unintended macro substitution of "assert()", we need to enclose 262 // varname__ with parenthese. 263 #define DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 264 default_value_as_string__, helpstring__, helparg__, \ 265 optional_arg__, type__, param_type__, parse_fn__) \ 266 public: \ 267 param_type__ \ 268 (varname__)() const \ 269 { return this->varname__##_.value; } \ 270 \ 271 bool \ 272 user_set_##varname__() const \ 273 { return this->varname__##_.user_set_via_option; } \ 274 \ 275 void \ 276 set_user_set_##varname__() \ 277 { this->varname__##_.user_set_via_option = true; } \ 278 \ 279 private: \ 280 struct Struct_##varname__ : public options::Struct_var \ 281 { \ 282 Struct_##varname__() \ 283 : option(#varname__, dashes__, shortname__, default_value_as_string__, \ 284 helpstring__, helparg__, optional_arg__, this), \ 285 user_set_via_option(false), value(default_value__) \ 286 { } \ 287 \ 288 void \ 289 parse_to_value(const char* option_name, const char* arg, \ 290 Command_line*, General_options*) \ 291 { \ 292 parse_fn__(option_name, arg, &this->value); \ 293 this->user_set_via_option = true; \ 294 } \ 295 \ 296 options::One_option option; \ 297 bool user_set_via_option; \ 298 type__ value; \ 299 }; \ 300 Struct_##varname__ varname__##_; \ 301 void \ 302 set_##varname__(param_type__ value) \ 303 { this->varname__##_.value = value; } 304 305 // These macros allow for easy addition of a new commandline option. 306 307 // If no_helpstring__ is not NULL, then in addition to creating 308 // VARNAME, we also create an option called no-VARNAME (or, for a -z 309 // option, noVARNAME). 310 #define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \ 311 helpstring__, no_helpstring__) \ 312 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 313 default_value__ ? "true" : "false", helpstring__, NULL, \ 314 false, bool, bool, options::parse_bool) \ 315 struct Struct_no_##varname__ : public options::Struct_var \ 316 { \ 317 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \ 318 ? "no" #varname__ \ 319 : "no-" #varname__), \ 320 dashes__, '\0', \ 321 default_value__ ? "false" : "true", \ 322 no_helpstring__, NULL, false, this) \ 323 { } \ 324 \ 325 void \ 326 parse_to_value(const char*, const char*, \ 327 Command_line*, General_options* options) \ 328 { \ 329 options->set_##varname__(false); \ 330 options->set_user_set_##varname__(); \ 331 } \ 332 \ 333 options::One_option option; \ 334 }; \ 335 Struct_no_##varname__ no_##varname__##_initializer_ 336 337 #define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \ 338 helpstring__, no_helpstring__) \ 339 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \ 340 default_value__ ? "true" : "false", helpstring__, NULL, \ 341 false, bool, bool, options::parse_bool) \ 342 struct Struct_disable_##varname__ : public options::Struct_var \ 343 { \ 344 Struct_disable_##varname__() : option("disable-" #varname__, \ 345 dashes__, '\0', \ 346 default_value__ ? "false" : "true", \ 347 no_helpstring__, NULL, false, this) \ 348 { } \ 349 \ 350 void \ 351 parse_to_value(const char*, const char*, \ 352 Command_line*, General_options* options) \ 353 { options->set_enable_##varname__(false); } \ 354 \ 355 options::One_option option; \ 356 }; \ 357 Struct_disable_##varname__ disable_##varname__##_initializer_ 358 359 #define DEFINE_int(varname__, dashes__, shortname__, default_value__, \ 360 helpstring__, helparg__) \ 361 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 362 #default_value__, helpstring__, helparg__, false, \ 363 int, int, options::parse_int) 364 365 #define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \ 366 helpstring__, helparg__) \ 367 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 368 #default_value__, helpstring__, helparg__, false, \ 369 int, int, options::parse_uint) 370 371 #define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \ 372 helpstring__, helparg__) \ 373 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 374 #default_value__, helpstring__, helparg__, false, \ 375 uint64_t, uint64_t, options::parse_uint64) 376 377 #define DEFINE_double(varname__, dashes__, shortname__, default_value__, \ 378 helpstring__, helparg__) \ 379 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 380 #default_value__, helpstring__, helparg__, false, \ 381 double, double, options::parse_double) 382 383 #define DEFINE_percent(varname__, dashes__, shortname__, default_value__, \ 384 helpstring__, helparg__) \ 385 DEFINE_var(varname__, dashes__, shortname__, default_value__ / 100.0, \ 386 #default_value__, helpstring__, helparg__, false, \ 387 double, double, options::parse_percent) 388 389 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \ 390 helpstring__, helparg__) \ 391 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 392 default_value__, helpstring__, helparg__, false, \ 393 const char*, const char*, options::parse_string) 394 395 // This is like DEFINE_string, but we convert each occurrence to a 396 // Search_directory and store it in a vector. Thus we also have the 397 // add_to_VARNAME() method, to append to the vector. 398 #define DEFINE_dirlist(varname__, dashes__, shortname__, \ 399 helpstring__, helparg__) \ 400 DEFINE_var(varname__, dashes__, shortname__, , \ 401 "", helpstring__, helparg__, false, options::Dir_list, \ 402 const options::Dir_list&, options::parse_dirlist) \ 403 void \ 404 add_to_##varname__(const char* new_value) \ 405 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \ 406 void \ 407 add_search_directory_to_##varname__(const Search_directory& dir) \ 408 { this->varname__##_.value.push_back(dir); } 409 410 // This is like DEFINE_string, but we store a set of strings. 411 #define DEFINE_set(varname__, dashes__, shortname__, \ 412 helpstring__, helparg__) \ 413 DEFINE_var(varname__, dashes__, shortname__, , \ 414 "", helpstring__, helparg__, false, options::String_set, \ 415 const options::String_set&, options::parse_set) \ 416 public: \ 417 bool \ 418 any_##varname__() const \ 419 { return !this->varname__##_.value.empty(); } \ 420 \ 421 bool \ 422 is_##varname__(const char* symbol) const \ 423 { \ 424 return (!this->varname__##_.value.empty() \ 425 && (this->varname__##_.value.find(std::string(symbol)) \ 426 != this->varname__##_.value.end())); \ 427 } \ 428 \ 429 options::String_set::const_iterator \ 430 varname__##_begin() const \ 431 { return this->varname__##_.value.begin(); } \ 432 \ 433 options::String_set::const_iterator \ 434 varname__##_end() const \ 435 { return this->varname__##_.value.end(); } 436 437 // When you have a list of possible values (expressed as string) 438 // After helparg__ should come an initializer list, like 439 // {"foo", "bar", "baz"} 440 #define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \ 441 helpstring__, helparg__, ...) \ 442 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 443 default_value__, helpstring__, helparg__, false, \ 444 const char*, const char*, parse_choices_##varname__) \ 445 private: \ 446 static void parse_choices_##varname__(const char* option_name, \ 447 const char* arg, \ 448 const char** retval) { \ 449 const char* choices[] = __VA_ARGS__; \ 450 options::parse_choices(option_name, arg, retval, \ 451 choices, sizeof(choices) / sizeof(*choices)); \ 452 } 453 454 // This is like DEFINE_bool, but VARNAME is the name of a different 455 // option. This option becomes an alias for that one. INVERT is true 456 // if this option is an inversion of the other one. 457 #define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \ 458 helpstring__, no_helpstring__, invert__) \ 459 private: \ 460 struct Struct_##option__ : public options::Struct_var \ 461 { \ 462 Struct_##option__() \ 463 : option(#option__, dashes__, shortname__, "", helpstring__, \ 464 NULL, false, this) \ 465 { } \ 466 \ 467 void \ 468 parse_to_value(const char*, const char*, \ 469 Command_line*, General_options* options) \ 470 { \ 471 options->set_##varname__(!invert__); \ 472 options->set_user_set_##varname__(); \ 473 } \ 474 \ 475 options::One_option option; \ 476 }; \ 477 Struct_##option__ option__##_; \ 478 \ 479 struct Struct_no_##option__ : public options::Struct_var \ 480 { \ 481 Struct_no_##option__() \ 482 : option((dashes__ == options::DASH_Z \ 483 ? "no" #option__ \ 484 : "no-" #option__), \ 485 dashes__, '\0', "", no_helpstring__, \ 486 NULL, false, this) \ 487 { } \ 488 \ 489 void \ 490 parse_to_value(const char*, const char*, \ 491 Command_line*, General_options* options) \ 492 { \ 493 options->set_##varname__(invert__); \ 494 options->set_user_set_##varname__(); \ 495 } \ 496 \ 497 options::One_option option; \ 498 }; \ 499 Struct_no_##option__ no_##option__##_initializer_ 500 501 // This is used for non-standard flags. It defines no functions; it 502 // just calls General_options::parse_VARNAME whenever the flag is 503 // seen. We declare parse_VARNAME as a static member of 504 // General_options; you are responsible for defining it there. 505 // helparg__ should be NULL iff this special-option is a boolean. 506 #define DEFINE_special(varname__, dashes__, shortname__, \ 507 helpstring__, helparg__) \ 508 private: \ 509 void parse_##varname__(const char* option, const char* arg, \ 510 Command_line* inputs); \ 511 struct Struct_##varname__ : public options::Struct_special \ 512 { \ 513 Struct_##varname__() \ 514 : options::Struct_special(#varname__, dashes__, shortname__, \ 515 &General_options::parse_##varname__, \ 516 helpstring__, helparg__) \ 517 { } \ 518 }; \ 519 Struct_##varname__ varname__##_initializer_ 520 521 // An option that takes an optional string argument. If the option is 522 // used with no argument, the value will be the default, and 523 // user_set_via_option will be true. 524 #define DEFINE_optional_string(varname__, dashes__, shortname__, \ 525 default_value__, \ 526 helpstring__, helparg__) \ 527 DEFINE_var(varname__, dashes__, shortname__, default_value__, \ 528 default_value__, helpstring__, helparg__, true, \ 529 const char*, const char*, options::parse_optional_string) 530 531 // A directory to search. For each directory we record whether it is 532 // in the sysroot. We need to know this so that, if a linker script 533 // is found within the sysroot, we will apply the sysroot to any files 534 // named by that script. 535 536 class Search_directory 537 { 538 public: 539 // We need a default constructor because we put this in a 540 // std::vector. 541 Search_directory() 542 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false) 543 { } 544 545 // This is the usual constructor. 546 Search_directory(const std::string& name, bool put_in_sysroot) 547 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false) 548 { 549 if (this->name_.empty()) 550 this->name_ = "."; 551 } 552 553 // This is called if we have a sysroot. The sysroot is prefixed to 554 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is 555 // set to true for any enries which are in the sysroot (this will 556 // naturally include any entries for which put_in_sysroot_ is true). 557 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of 558 // passing SYSROOT to lrealpath. 559 void 560 add_sysroot(const char* sysroot, const char* canonical_sysroot); 561 562 // Get the directory name. 563 const std::string& 564 name() const 565 { return this->name_; } 566 567 // Return whether this directory is in the sysroot. 568 bool 569 is_in_sysroot() const 570 { return this->is_in_sysroot_; } 571 572 // Return whether this is considered a system directory. 573 bool 574 is_system_directory() const 575 { return this->put_in_sysroot_ || this->is_in_sysroot_; } 576 577 private: 578 // The directory name. 579 std::string name_; 580 // True if the sysroot should be added as a prefix for this 581 // directory (if there is a sysroot). This is true for system 582 // directories that we search by default. 583 bool put_in_sysroot_; 584 // True if this directory is in the sysroot (if there is a sysroot). 585 // This is true if there is a sysroot and either 1) put_in_sysroot_ 586 // is true, or 2) the directory happens to be in the sysroot based 587 // on a pathname comparison. 588 bool is_in_sysroot_; 589 }; 590 591 class General_options 592 { 593 private: 594 // NOTE: For every option that you add here, also consider if you 595 // should add it to Position_dependent_options. 596 DEFINE_special(help, options::TWO_DASHES, '\0', 597 N_("Report usage information"), NULL); 598 DEFINE_special(version, options::TWO_DASHES, 'v', 599 N_("Report version information"), NULL); 600 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0', 601 N_("Report version and target information"), NULL); 602 603 // These options are sorted approximately so that for each letter in 604 // the alphabet, we show the option whose shortname is that letter 605 // (if any) and then every longname that starts with that letter (in 606 // alphabetical order). For both, lowercase sorts before uppercase. 607 // The -z options come last. 608 609 DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false, 610 N_("Not supported"), 611 N_("Do not copy DT_NEEDED tags from shared libraries")); 612 613 DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES, 614 '\0', N_("Allow multiple definitions of symbols"), 615 N_("Do not allow multiple definitions"), false); 616 617 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false, 618 N_("Allow unresolved references in shared libraries"), 619 N_("Do not allow unresolved references in shared libraries")); 620 621 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false, 622 N_("Only set DT_NEEDED for shared libraries if used"), 623 N_("Always DT_NEEDED for shared libraries")); 624 625 DEFINE_enum(assert, options::ONE_DASH, '\0', NULL, 626 N_("Ignored"), N_("[ignored]"), 627 {"definitions", "nodefinitions", "nosymbolic", "pure-text"}); 628 629 // This should really be an "enum", but it's too easy for folks to 630 // forget to update the list as they add new targets. So we just 631 // accept any string. We'll fail later (when the string is parsed), 632 // if the target isn't actually supported. 633 DEFINE_string(format, options::TWO_DASHES, 'b', "elf", 634 N_("Set input format"), ("[elf,binary]")); 635 636 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true, 637 N_("-l searches for shared libraries"), NULL); 638 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0', 639 N_("-l does not search for shared libraries"), NULL, 640 true); 641 DEFINE_bool_alias(dy, Bdynamic, options::ONE_DASH, '\0', 642 N_("alias for -Bdynamic"), NULL, false); 643 DEFINE_bool_alias(dn, Bdynamic, options::ONE_DASH, '\0', 644 N_("alias for -Bstatic"), NULL, true); 645 646 DEFINE_bool(Bgroup, options::ONE_DASH, '\0', false, 647 N_("Use group name lookup rules for shared library"), NULL); 648 649 DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false, 650 N_("Bind defined symbols locally"), NULL); 651 652 DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false, 653 N_("Bind defined function symbols locally"), NULL); 654 655 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "sha1", 656 N_("Generate build ID note"), 657 N_("[=STYLE]")); 658 659 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true, 660 N_("Check segment addresses for overlaps (default)"), 661 N_("Do not check segment addresses for overlaps")); 662 663 #ifdef HAVE_ZLIB_H 664 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", 665 N_("Compress .debug_* sections in the output file"), 666 ("[none,zlib]"), 667 {"none", "zlib"}); 668 #else 669 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", 670 N_("Compress .debug_* sections in the output file"), 671 N_("[none]"), 672 {"none"}); 673 #endif 674 675 DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false, 676 N_("Not supported"), 677 N_("Do not copy DT_NEEDED tags from shared libraries")); 678 679 DEFINE_bool(cref, options::TWO_DASHES, '\0', false, 680 N_("Output cross reference table"), 681 N_("Do not output cross reference table")); 682 683 DEFINE_bool(ctors_in_init_array, options::TWO_DASHES, '\0', true, 684 N_("Use DT_INIT_ARRAY for all constructors (default)"), 685 N_("Handle constructors as directed by compiler")); 686 687 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false, 688 N_("Define common symbols"), 689 N_("Do not define common symbols")); 690 DEFINE_bool(dc, options::ONE_DASH, '\0', false, 691 N_("Alias for -d"), NULL); 692 DEFINE_bool(dp, options::ONE_DASH, '\0', false, 693 N_("Alias for -d"), NULL); 694 695 DEFINE_string(debug, options::TWO_DASHES, '\0', "", 696 N_("Turn on debugging"), 697 N_("[all,files,script,task][,...]")); 698 699 DEFINE_special(defsym, options::TWO_DASHES, '\0', 700 N_("Define a symbol"), N_("SYMBOL=EXPRESSION")); 701 702 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL, 703 N_("Demangle C++ symbols in log messages"), 704 N_("[=STYLE]")); 705 706 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false, 707 N_("Do not demangle C++ symbols in log messages"), 708 NULL); 709 710 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false, 711 N_("Look for violations of the C++ One Definition Rule"), 712 N_("Do not look for violations of the C++ One Definition Rule")); 713 714 DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false, 715 N_("Delete all local symbols"), NULL); 716 DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false, 717 N_("Delete all temporary local symbols"), NULL); 718 719 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false, 720 N_("Add data symbols to dynamic symbols"), NULL); 721 722 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false, 723 N_("Add C++ operator new/delete to dynamic symbols"), NULL); 724 725 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false, 726 N_("Add C++ typeinfo to dynamic symbols"), NULL); 727 728 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0', 729 N_("Read a list of dynamic symbols"), N_("FILE")); 730 731 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL, 732 N_("Set program start address"), N_("ADDRESS")); 733 734 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0', 735 N_("Exclude libraries from automatic export"), 736 N_(("lib,lib ..."))); 737 738 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false, 739 N_("Export all dynamic symbols"), 740 N_("Do not export all dynamic symbols (default)")); 741 742 DEFINE_set(export_dynamic_symbol, options::TWO_DASHES, '\0', 743 N_("Export SYMBOL to dynamic symbol table"), N_("SYMBOL")); 744 745 DEFINE_special(EB, options::ONE_DASH, '\0', 746 N_("Link big-endian objects."), NULL); 747 748 DEFINE_special(EL, options::ONE_DASH, '\0', 749 N_("Link little-endian objects."), NULL); 750 751 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false, 752 N_("Create exception frame header"), NULL); 753 754 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL, 755 N_("(ARM only) Do not warn about objects with incompatible " 756 "enum sizes")); 757 758 DEFINE_set(auxiliary, options::TWO_DASHES, 'f', 759 N_("Auxiliary filter for shared object symbol table"), 760 N_("SHLIB")); 761 762 DEFINE_string(filter, options::TWO_DASHES, 'F', NULL, 763 N_("Filter for shared object symbol table"), 764 N_("SHLIB")); 765 766 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false, 767 N_("Treat warnings as errors"), 768 N_("Do not treat warnings as errors")); 769 770 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini", 771 N_("Call SYMBOL at unload-time"), N_("SYMBOL")); 772 773 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false, 774 N_("(ARM only) Fix binaries for Cortex-A8 erratum."), 775 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum.")); 776 777 DEFINE_bool(fix_arm1176, options::TWO_DASHES, '\0', true, 778 N_("(ARM only) Fix binaries for ARM1176 erratum."), 779 N_("(ARM only) Do not fix binaries for ARM1176 erratum.")); 780 781 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true, 782 N_("(ARM only) Merge exidx entries in debuginfo."), 783 N_("(ARM only) Do not merge exidx entries in debuginfo.")); 784 785 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0', 786 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"), 787 NULL); 788 789 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0', 790 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking " 791 "veneer"), 792 NULL); 793 794 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false, 795 N_("Ignored"), NULL); 796 797 DEFINE_bool(gdb_index, options::TWO_DASHES, '\0', false, 798 N_("Generate .gdb_index section"), 799 N_("Do not generate .gdb_index section")); 800 801 DEFINE_bool(gnu_unique, options::TWO_DASHES, '\0', true, 802 N_("Enable STB_GNU_UNIQUE symbol binding (default)"), 803 N_("Disable STB_GNU_UNIQUE symbol binding")); 804 805 DEFINE_string(soname, options::ONE_DASH, 'h', NULL, 806 N_("Set shared library name"), N_("FILENAME")); 807 808 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0, 809 N_("Min fraction of empty buckets in dynamic hash"), 810 N_("FRACTION")); 811 812 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv", 813 N_("Dynamic hash style"), N_("[sysv,gnu,both]"), 814 {"sysv", "gnu", "both"}); 815 816 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL, 817 N_("Set dynamic linker path"), N_("PROGRAM")); 818 819 DEFINE_special(incremental, options::TWO_DASHES, '\0', 820 N_("Do an incremental link if possible; " 821 "otherwise, do a full link and prepare output " 822 "for incremental linking"), NULL); 823 824 DEFINE_special(no_incremental, options::TWO_DASHES, '\0', 825 N_("Do a full link (default)"), NULL); 826 827 DEFINE_special(incremental_full, options::TWO_DASHES, '\0', 828 N_("Do a full link and " 829 "prepare output for incremental linking"), NULL); 830 831 DEFINE_special(incremental_update, options::TWO_DASHES, '\0', 832 N_("Do an incremental link; exit if not possible"), NULL); 833 834 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL, 835 N_("Set base file for incremental linking" 836 " (default is output file)"), 837 N_("FILE")); 838 839 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0', 840 N_("Assume files changed"), NULL); 841 842 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0', 843 N_("Assume files didn't change"), NULL); 844 845 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0', 846 N_("Use timestamps to check files (default)"), NULL); 847 848 DEFINE_special(incremental_startup_unchanged, options::TWO_DASHES, '\0', 849 N_("Assume startup files unchanged " 850 "(files preceding this option)"), NULL); 851 852 DEFINE_percent(incremental_patch, options::TWO_DASHES, '\0', 10, 853 N_("Amount of extra space to allocate for patches"), 854 N_("PERCENT")); 855 856 DEFINE_string(init, options::ONE_DASH, '\0', "_init", 857 N_("Call SYMBOL at load-time"), N_("SYMBOL")); 858 859 DEFINE_special(just_symbols, options::TWO_DASHES, '\0', 860 N_("Read only symbol values from FILE"), N_("FILE")); 861 862 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0', 863 sizeof(void*) >= 8, 864 N_("Map whole files to memory (default on 64-bit hosts)"), 865 N_("Map relevant file parts to memory (default on 32-bit " 866 "hosts)")); 867 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true, 868 N_("Keep files mapped across passes (default)"), 869 N_("Release mapped files after each pass")); 870 871 DEFINE_bool(ld_generated_unwind_info, options::TWO_DASHES, '\0', true, 872 N_("Generate unwind information for PLT (default)"), 873 N_("Do not generate unwind information for PLT")); 874 875 DEFINE_special(library, options::TWO_DASHES, 'l', 876 N_("Search for library LIBNAME"), N_("LIBNAME")); 877 878 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L', 879 N_("Add directory to search path"), N_("DIR")); 880 881 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false, 882 N_(" Only search directories specified on the command line."), 883 NULL); 884 885 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false, 886 N_(" Put read-only non-executable sections in their own segment"), 887 NULL); 888 889 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "", 890 N_("Set GNU linker emulation; obsolete"), N_("EMULATION")); 891 892 DEFINE_bool(mmap_output_file, options::TWO_DASHES, '\0', true, 893 N_("Map the output file for writing (default)."), 894 N_("Do not map the output file for writing.")); 895 896 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false, 897 N_("Write map file on standard output"), NULL); 898 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"), 899 N_("MAPFILENAME")); 900 901 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false, 902 N_("Do not page align data"), NULL); 903 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false, 904 N_("Do not page align data, do not make text readonly"), 905 N_("Page align data, make text readonly")); 906 907 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false, 908 N_("Enable use of DT_RUNPATH and DT_FLAGS"), 909 N_("Disable use of DT_RUNPATH and DT_FLAGS")); 910 911 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false, 912 N_("Create an output file even if errors occur"), NULL); 913 914 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0', 915 N_("Report undefined symbols (even with --shared)"), 916 NULL, false); 917 918 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out", 919 N_("Set output file name"), N_("FILE")); 920 921 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0, 922 N_("Optimize output file size"), N_("LEVEL")); 923 924 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf", 925 N_("Set output format"), N_("[binary]")); 926 927 DEFINE_bool(p, options::ONE_DASH, '\0', false, 928 N_("(ARM only) Ignore for backward compatibility"), NULL); 929 930 DEFINE_bool(pie, options::ONE_DASH, '\0', false, 931 N_("Create a position independent executable"), NULL); 932 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0', 933 N_("Create a position independent executable"), NULL, 934 false); 935 936 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false, 937 NULL, N_("(ARM only) Ignore for backward compatibility")); 938 939 #ifdef ENABLE_PLUGINS 940 DEFINE_special(plugin, options::TWO_DASHES, '\0', 941 N_("Load a plugin library"), N_("PLUGIN")); 942 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0', 943 N_("Pass an option to the plugin"), N_("OPTION")); 944 #endif 945 946 DEFINE_bool(posix_fallocate, options::TWO_DASHES, '\0', true, 947 N_("Use posix_fallocate to reserve space in the output file" 948 " (default)."), 949 N_("Use fallocate or ftruncate to reserve space.")); 950 951 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false, 952 N_("Preread archive symbols when multi-threaded"), NULL); 953 954 DEFINE_bool(print_output_format, options::TWO_DASHES, '\0', false, 955 N_("Print default output format"), NULL); 956 957 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL, 958 N_("Print symbols defined and used for each input"), 959 N_("FILENAME")); 960 961 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false, 962 N_("Ignored for SVR4 compatibility"), NULL); 963 964 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false, 965 N_("Generate relocations in output"), NULL); 966 967 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false, 968 N_("Generate relocatable output"), NULL); 969 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0', 970 N_("Synonym for -r"), NULL, false); 971 972 DEFINE_bool(relax, options::TWO_DASHES, '\0', false, 973 N_("Relax branches on certain targets"), NULL); 974 975 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL, 976 N_("keep only symbols listed in this file"), N_("FILE")); 977 978 // -R really means -rpath, but can mean --just-symbols for 979 // compatibility with GNU ld. -rpath is always -rpath, so we list 980 // it separately. 981 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R', 982 N_("Add DIR to runtime search path"), N_("DIR")); 983 984 DEFINE_dirlist(rpath, options::ONE_DASH, '\0', 985 N_("Add DIR to runtime search path"), N_("DIR")); 986 987 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0', 988 N_("Add DIR to link time shared library search path"), 989 N_("DIR")); 990 991 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL, 992 N_("Layout sections in the order specified."), 993 N_("FILENAME")); 994 995 DEFINE_special(section_start, options::TWO_DASHES, '\0', 996 N_("Set address of section"), N_("SECTION=ADDRESS")); 997 998 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL, 999 N_("Sort common symbols by alignment"), 1000 N_("[={ascending,descending}]")); 1001 1002 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5, 1003 N_("Dynamic tag slots to reserve (default 5)"), 1004 N_("COUNT")); 1005 1006 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false, 1007 N_("Strip all symbols"), NULL); 1008 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false, 1009 N_("Strip debugging information"), NULL); 1010 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false, 1011 N_("Emit only debug line number information"), NULL); 1012 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false, 1013 N_("Strip debug symbols that are unused by gdb " 1014 "(at least versions <= 7.4)"), NULL); 1015 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true, 1016 N_("Strip LTO intermediate code sections"), NULL); 1017 1018 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1, 1019 N_("(ARM only) The maximum distance from instructions in a group " 1020 "of sections to their stubs. Negative values mean stubs " 1021 "are always after the group. 1 means using default size.\n"), 1022 N_("SIZE")); 1023 1024 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false, 1025 N_("Use less memory and more disk I/O " 1026 "(included only for compatibility with GNU ld)"), NULL); 1027 1028 DEFINE_bool(shared, options::ONE_DASH, 'G', false, 1029 N_("Generate shared library"), NULL); 1030 1031 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false, 1032 N_("Generate shared library"), NULL); 1033 1034 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000, 1035 N_("Stack size when -fsplit-stack function calls non-split"), 1036 N_("SIZE")); 1037 1038 // This is not actually special in any way, but I need to give it 1039 // a non-standard accessor-function name because 'static' is a keyword. 1040 DEFINE_special(static, options::ONE_DASH, '\0', 1041 N_("Do not link against shared libraries"), NULL); 1042 1043 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none", 1044 N_("Identical Code Folding. " 1045 "\'--icf=safe\' Folds ctors, dtors and functions whose" 1046 " pointers are definitely not taken."), 1047 ("[none,all,safe]"), 1048 {"none", "all", "safe"}); 1049 1050 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0, 1051 N_("Number of iterations of ICF (default 2)"), N_("COUNT")); 1052 1053 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false, 1054 N_("List folded identical sections on stderr"), 1055 N_("Do not list folded identical sections")); 1056 1057 DEFINE_set(keep_unique, options::TWO_DASHES, '\0', 1058 N_("Do not fold this symbol during ICF"), N_("SYMBOL")); 1059 1060 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false, 1061 N_("Remove unused sections"), 1062 N_("Don't remove unused sections (default)")); 1063 1064 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false, 1065 N_("List removed unused sections on stderr"), 1066 N_("Do not list removed unused sections")); 1067 1068 DEFINE_bool(stats, options::TWO_DASHES, '\0', false, 1069 N_("Print resource usage statistics"), NULL); 1070 1071 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "", 1072 N_("Set target system root directory"), N_("DIR")); 1073 1074 DEFINE_bool(trace, options::TWO_DASHES, 't', false, 1075 N_("Print the name of each input file"), NULL); 1076 1077 DEFINE_special(script, options::TWO_DASHES, 'T', 1078 N_("Read linker script"), N_("FILE")); 1079 1080 DEFINE_bool(threads, options::TWO_DASHES, '\0', false, 1081 N_("Run the linker multi-threaded"), 1082 N_("Do not run the linker multi-threaded")); 1083 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0, 1084 N_("Number of threads to use"), N_("COUNT")); 1085 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0, 1086 N_("Number of threads to use in initial pass"), N_("COUNT")); 1087 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0, 1088 N_("Number of threads to use in middle pass"), N_("COUNT")); 1089 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0, 1090 N_("Number of threads to use in final pass"), N_("COUNT")); 1091 1092 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U, 1093 N_("Set the address of the bss segment"), N_("ADDRESS")); 1094 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U, 1095 N_("Set the address of the data segment"), N_("ADDRESS")); 1096 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U, 1097 N_("Set the address of the text segment"), N_("ADDRESS")); 1098 1099 DEFINE_set(undefined, options::TWO_DASHES, 'u', 1100 N_("Create undefined reference to SYMBOL"), N_("SYMBOL")); 1101 1102 DEFINE_enum(unresolved_symbols, options::TWO_DASHES, '\0', NULL, 1103 N_("How to handle unresolved symbols"), 1104 ("ignore-all,report-all,ignore-in-object-files," 1105 "ignore-in-shared-libs"), 1106 {"ignore-all", "report-all", "ignore-in-object-files", 1107 "ignore-in-shared-libs"}); 1108 1109 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false, 1110 N_("Synonym for --debug=files"), NULL); 1111 1112 DEFINE_special(version_script, options::TWO_DASHES, '\0', 1113 N_("Read version script"), N_("FILE")); 1114 1115 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false, 1116 N_("Warn about duplicate common symbols"), 1117 N_("Do not warn about duplicate common symbols (default)")); 1118 1119 DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false, 1120 N_("Ignored"), N_("Ignored")); 1121 1122 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false, 1123 N_("Warn if the stack is executable"), 1124 N_("Do not warn if the stack is executable (default)")); 1125 1126 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true, 1127 NULL, N_("Don't warn about mismatched input files")); 1128 1129 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false, 1130 N_("Ignored"), NULL); 1131 1132 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true, 1133 N_("Warn when skipping an incompatible library"), 1134 N_("Don't warn when skipping an incompatible library")); 1135 1136 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false, 1137 N_("Warn if text segment is not shareable"), 1138 N_("Do not warn if text segment is not shareable (default)")); 1139 1140 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false, 1141 N_("Report unresolved symbols as warnings"), 1142 NULL); 1143 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols, 1144 options::TWO_DASHES, '\0', 1145 N_("Report unresolved symbols as errors"), 1146 NULL, true); 1147 1148 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL, 1149 N_("(ARM only) Do not warn about objects with incompatible " 1150 "wchar_t sizes")); 1151 1152 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false, 1153 N_("Include all archive contents"), 1154 N_("Include only needed archive contents")); 1155 1156 DEFINE_set(wrap, options::TWO_DASHES, '\0', 1157 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL")); 1158 1159 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y', 1160 N_("Trace references to symbol"), N_("SYMBOL")); 1161 1162 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true, 1163 N_("Allow unused version in script (default)"), 1164 N_("Do not allow unused version in script")); 1165 1166 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "", 1167 N_("Default search path for Solaris compatibility"), 1168 N_("PATH")); 1169 1170 DEFINE_special(start_group, options::TWO_DASHES, '(', 1171 N_("Start a library search group"), NULL); 1172 DEFINE_special(end_group, options::TWO_DASHES, ')', 1173 N_("End a library search group"), NULL); 1174 1175 1176 DEFINE_special(start_lib, options::TWO_DASHES, '\0', 1177 N_("Start a library"), NULL); 1178 DEFINE_special(end_lib, options::TWO_DASHES, '\0', 1179 N_("End a library "), NULL); 1180 1181 // The -z options. 1182 1183 DEFINE_bool(combreloc, options::DASH_Z, '\0', true, 1184 N_("Sort dynamic relocs"), 1185 N_("Do not sort dynamic relocs")); 1186 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0, 1187 N_("Set common page size to SIZE"), N_("SIZE")); 1188 DEFINE_bool(defs, options::DASH_Z, '\0', false, 1189 N_("Report undefined symbols (even with --shared)"), 1190 NULL); 1191 DEFINE_bool(execstack, options::DASH_Z, '\0', false, 1192 N_("Mark output as requiring executable stack"), NULL); 1193 DEFINE_bool(initfirst, options::DASH_Z, '\0', false, 1194 N_("Mark DSO to be initialized first at runtime"), 1195 NULL); 1196 DEFINE_bool(interpose, options::DASH_Z, '\0', false, 1197 N_("Mark object to interpose all DSOs but executable"), 1198 NULL); 1199 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0', 1200 N_("Mark object for lazy runtime binding (default)"), 1201 NULL, true); 1202 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false, 1203 N_("Mark object requiring immediate process"), 1204 NULL); 1205 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0, 1206 N_("Set maximum page size to SIZE"), N_("SIZE")); 1207 DEFINE_bool(muldefs, options::DASH_Z, '\0', false, 1208 N_("Allow multiple definitions of symbols"), 1209 NULL); 1210 // copyreloc is here in the list because there is only -z 1211 // nocopyreloc, not -z copyreloc. 1212 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true, 1213 NULL, 1214 N_("Do not create copy relocs")); 1215 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false, 1216 N_("Mark object not to use default search paths"), 1217 NULL); 1218 DEFINE_bool(nodelete, options::DASH_Z, '\0', false, 1219 N_("Mark DSO non-deletable at runtime"), 1220 NULL); 1221 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false, 1222 N_("Mark DSO not available to dlopen"), 1223 NULL); 1224 DEFINE_bool(nodump, options::DASH_Z, '\0', false, 1225 N_("Mark DSO not available to dldump"), 1226 NULL); 1227 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false, 1228 N_("Mark output as not requiring executable stack"), NULL); 1229 DEFINE_bool(now, options::DASH_Z, '\0', false, 1230 N_("Mark object for immediate function binding"), 1231 NULL); 1232 DEFINE_bool(origin, options::DASH_Z, '\0', false, 1233 N_("Mark DSO to indicate that needs immediate $ORIGIN " 1234 "processing at runtime"), NULL); 1235 DEFINE_bool(relro, options::DASH_Z, '\0', false, 1236 N_("Where possible mark variables read-only after relocation"), 1237 N_("Don't mark variables read-only after relocation")); 1238 DEFINE_bool(text, options::DASH_Z, '\0', false, 1239 N_("Do not permit relocations in read-only segments"), 1240 N_("Permit relocations in read-only segments (default)")); 1241 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0', 1242 N_("Permit relocations in read-only segments (default)"), 1243 NULL, true); 1244 1245 public: 1246 typedef options::Dir_list Dir_list; 1247 1248 General_options(); 1249 1250 // Does post-processing on flags, making sure they all have 1251 // non-conflicting values. Also converts some flags from their 1252 // "standard" types (string, etc), to another type (enum, DirList), 1253 // which can be accessed via a separate method. Dies if it notices 1254 // any problems. 1255 void finalize(); 1256 1257 // True if we printed the version information. 1258 bool 1259 printed_version() const 1260 { return this->printed_version_; } 1261 1262 // The macro defines output() (based on --output), but that's a 1263 // generic name. Provide this alternative name, which is clearer. 1264 const char* 1265 output_file_name() const 1266 { return this->output(); } 1267 1268 // This is not defined via a flag, but combines flags to say whether 1269 // the output is position-independent or not. 1270 bool 1271 output_is_position_independent() const 1272 { return this->shared() || this->pie(); } 1273 1274 // Return true if the output is something that can be exec()ed, such 1275 // as a static executable, or a position-dependent or 1276 // position-independent executable, but not a dynamic library or an 1277 // object file. 1278 bool 1279 output_is_executable() const 1280 { return !this->shared() && !this->relocatable(); } 1281 1282 // This would normally be static(), and defined automatically, but 1283 // since static is a keyword, we need to come up with our own name. 1284 bool 1285 is_static() const 1286 { return static_; } 1287 1288 // In addition to getting the input and output formats as a string 1289 // (via format() and oformat()), we also give access as an enum. 1290 enum Object_format 1291 { 1292 // Ordinary ELF. 1293 OBJECT_FORMAT_ELF, 1294 // Straight binary format. 1295 OBJECT_FORMAT_BINARY 1296 }; 1297 1298 // Convert a string to an Object_format. Gives an error if the 1299 // string is not recognized. 1300 static Object_format 1301 string_to_object_format(const char* arg); 1302 1303 // Note: these functions are not very fast. 1304 Object_format format_enum() const; 1305 Object_format oformat_enum() const; 1306 1307 // Return whether FILENAME is in a system directory. 1308 bool 1309 is_in_system_directory(const std::string& name) const; 1310 1311 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_. 1312 bool 1313 should_retain_symbol(const char* symbol_name) const 1314 { 1315 if (symbols_to_retain_.empty()) // means flag wasn't specified 1316 return true; 1317 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end(); 1318 } 1319 1320 // These are the best way to get access to the execstack state, 1321 // not execstack() and noexecstack() which are hard to use properly. 1322 bool 1323 is_execstack_set() const 1324 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; } 1325 1326 bool 1327 is_stack_executable() const 1328 { return this->execstack_status_ == EXECSTACK_YES; } 1329 1330 bool 1331 icf_enabled() const 1332 { return this->icf_status_ != ICF_NONE; } 1333 1334 bool 1335 icf_safe_folding() const 1336 { return this->icf_status_ == ICF_SAFE; } 1337 1338 // The --demangle option takes an optional string, and there is also 1339 // a --no-demangle option. This is the best way to decide whether 1340 // to demangle or not. 1341 bool 1342 do_demangle() const 1343 { return this->do_demangle_; } 1344 1345 // Returns TRUE if any plugin libraries have been loaded. 1346 bool 1347 has_plugins() const 1348 { return this->plugins_ != NULL; } 1349 1350 // Return a pointer to the plugin manager. 1351 Plugin_manager* 1352 plugins() const 1353 { return this->plugins_; } 1354 1355 // True iff SYMBOL was found in the file specified by dynamic-list. 1356 bool 1357 in_dynamic_list(const char* symbol) const 1358 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); } 1359 1360 // Finalize the dynamic list. 1361 void 1362 finalize_dynamic_list() 1363 { this->dynamic_list_.version_script_info()->finalize(); } 1364 1365 // The mode selected by the --incremental options. 1366 enum Incremental_mode 1367 { 1368 // No incremental linking (--no-incremental). 1369 INCREMENTAL_OFF, 1370 // Incremental update only (--incremental-update). 1371 INCREMENTAL_UPDATE, 1372 // Force a full link, but prepare for subsequent incremental link 1373 // (--incremental-full). 1374 INCREMENTAL_FULL, 1375 // Incremental update if possible, fallback to full link (--incremental). 1376 INCREMENTAL_AUTO 1377 }; 1378 1379 // The incremental linking mode. 1380 Incremental_mode 1381 incremental_mode() const 1382 { return this->incremental_mode_; } 1383 1384 // The disposition given by the --incremental-changed, 1385 // --incremental-unchanged or --incremental-unknown option. The 1386 // value may change as we proceed parsing the command line flags. 1387 Incremental_disposition 1388 incremental_disposition() const 1389 { return this->incremental_disposition_; } 1390 1391 // The disposition to use for startup files (those that precede the 1392 // first --incremental-changed, etc. option). 1393 Incremental_disposition 1394 incremental_startup_disposition() const 1395 { return this->incremental_startup_disposition_; } 1396 1397 // Return true if S is the name of a library excluded from automatic 1398 // symbol export. 1399 bool 1400 check_excluded_libs(const std::string &s) const; 1401 1402 // If an explicit start address was given for section SECNAME with 1403 // the --section-start option, return true and set *PADDR to the 1404 // address. Otherwise return false. 1405 bool 1406 section_start(const char* secname, uint64_t* paddr) const; 1407 1408 // Return whether any --section-start option was used. 1409 bool 1410 any_section_start() const 1411 { return !this->section_starts_.empty(); } 1412 1413 enum Fix_v4bx 1414 { 1415 // Leave original instruction. 1416 FIX_V4BX_NONE, 1417 // Replace instruction. 1418 FIX_V4BX_REPLACE, 1419 // Generate an interworking veneer. 1420 FIX_V4BX_INTERWORKING 1421 }; 1422 1423 Fix_v4bx 1424 fix_v4bx() const 1425 { return (this->fix_v4bx_); } 1426 1427 enum Endianness 1428 { 1429 ENDIANNESS_NOT_SET, 1430 ENDIANNESS_BIG, 1431 ENDIANNESS_LITTLE 1432 }; 1433 1434 Endianness 1435 endianness() const 1436 { return this->endianness_; } 1437 1438 private: 1439 // Don't copy this structure. 1440 General_options(const General_options&); 1441 General_options& operator=(const General_options&); 1442 1443 // Whether to mark the stack as executable. 1444 enum Execstack 1445 { 1446 // Not set on command line. 1447 EXECSTACK_FROM_INPUT, 1448 // Mark the stack as executable (-z execstack). 1449 EXECSTACK_YES, 1450 // Mark the stack as not executable (-z noexecstack). 1451 EXECSTACK_NO 1452 }; 1453 1454 enum Icf_status 1455 { 1456 // Do not fold any functions (Default or --icf=none). 1457 ICF_NONE, 1458 // All functions are candidates for folding. (--icf=all). 1459 ICF_ALL, 1460 // Only ctors and dtors are candidates for folding. (--icf=safe). 1461 ICF_SAFE 1462 }; 1463 1464 void 1465 set_icf_status(Icf_status value) 1466 { this->icf_status_ = value; } 1467 1468 void 1469 set_execstack_status(Execstack value) 1470 { this->execstack_status_ = value; } 1471 1472 void 1473 set_do_demangle(bool value) 1474 { this->do_demangle_ = value; } 1475 1476 void 1477 set_static(bool value) 1478 { static_ = value; } 1479 1480 // These are called by finalize() to set up the search-path correctly. 1481 void 1482 add_to_library_path_with_sysroot(const std::string& arg) 1483 { this->add_search_directory_to_library_path(Search_directory(arg, true)); } 1484 1485 // Apply any sysroot to the directory lists. 1486 void 1487 add_sysroot(); 1488 1489 // Add a plugin and its arguments to the list of plugins. 1490 void 1491 add_plugin(const char* filename); 1492 1493 // Add a plugin option. 1494 void 1495 add_plugin_option(const char* opt); 1496 1497 // Whether we printed version information. 1498 bool printed_version_; 1499 // Whether to mark the stack as executable. 1500 Execstack execstack_status_; 1501 // Whether to do code folding. 1502 Icf_status icf_status_; 1503 // Whether to do a static link. 1504 bool static_; 1505 // Whether to do demangling. 1506 bool do_demangle_; 1507 // List of plugin libraries. 1508 Plugin_manager* plugins_; 1509 // The parsed output of --dynamic-list files. For convenience in 1510 // script.cc, we store this as a Script_options object, even though 1511 // we only use a single Version_tree from it. 1512 Script_options dynamic_list_; 1513 // The incremental linking mode. 1514 Incremental_mode incremental_mode_; 1515 // The disposition given by the --incremental-changed, 1516 // --incremental-unchanged or --incremental-unknown option. The 1517 // value may change as we proceed parsing the command line flags. 1518 Incremental_disposition incremental_disposition_; 1519 // The disposition to use for startup files (those marked 1520 // INCREMENTAL_STARTUP). 1521 Incremental_disposition incremental_startup_disposition_; 1522 // Whether we have seen one of the options that require incremental 1523 // build (--incremental-changed, --incremental-unchanged, 1524 // --incremental-unknown, or --incremental-startup-unchanged). 1525 bool implicit_incremental_; 1526 // Libraries excluded from automatic export, via --exclude-libs. 1527 Unordered_set<std::string> excluded_libs_; 1528 // List of symbol-names to keep, via -retain-symbol-info. 1529 Unordered_set<std::string> symbols_to_retain_; 1530 // Map from section name to address from --section-start. 1531 std::map<std::string, uint64_t> section_starts_; 1532 // Whether to process armv4 bx instruction relocation. 1533 Fix_v4bx fix_v4bx_; 1534 // Endianness. 1535 Endianness endianness_; 1536 }; 1537 1538 // The position-dependent options. We use this to store the state of 1539 // the commandline at a particular point in parsing for later 1540 // reference. For instance, if we see "ld --whole-archive foo.a 1541 // --no-whole-archive," we want to store the whole-archive option with 1542 // foo.a, so when the time comes to parse foo.a we know we should do 1543 // it in whole-archive mode. We could store all of General_options, 1544 // but that's big, so we just pick the subset of flags that actually 1545 // change in a position-dependent way. 1546 1547 #define DEFINE_posdep(varname__, type__) \ 1548 public: \ 1549 type__ \ 1550 varname__() const \ 1551 { return this->varname__##_; } \ 1552 \ 1553 void \ 1554 set_##varname__(type__ value) \ 1555 { this->varname__##_ = value; } \ 1556 private: \ 1557 type__ varname__##_ 1558 1559 class Position_dependent_options 1560 { 1561 public: 1562 Position_dependent_options(const General_options& options 1563 = Position_dependent_options::default_options_) 1564 { copy_from_options(options); } 1565 1566 void copy_from_options(const General_options& options) 1567 { 1568 this->set_as_needed(options.as_needed()); 1569 this->set_Bdynamic(options.Bdynamic()); 1570 this->set_format_enum(options.format_enum()); 1571 this->set_whole_archive(options.whole_archive()); 1572 this->set_incremental_disposition(options.incremental_disposition()); 1573 } 1574 1575 DEFINE_posdep(as_needed, bool); 1576 DEFINE_posdep(Bdynamic, bool); 1577 DEFINE_posdep(format_enum, General_options::Object_format); 1578 DEFINE_posdep(whole_archive, bool); 1579 DEFINE_posdep(incremental_disposition, Incremental_disposition); 1580 1581 private: 1582 // This is a General_options with everything set to its default 1583 // value. A Position_dependent_options created with no argument 1584 // will take its values from here. 1585 static General_options default_options_; 1586 }; 1587 1588 1589 // A single file or library argument from the command line. 1590 1591 class Input_file_argument 1592 { 1593 public: 1594 enum Input_file_type 1595 { 1596 // A regular file, name used as-is, not searched. 1597 INPUT_FILE_TYPE_FILE, 1598 // A library name. When used, "lib" will be prepended and ".so" or 1599 // ".a" appended to make a filename, and that filename will be searched 1600 // for using the -L paths. 1601 INPUT_FILE_TYPE_LIBRARY, 1602 // A regular file, name used as-is, but searched using the -L paths. 1603 INPUT_FILE_TYPE_SEARCHED_FILE 1604 }; 1605 1606 // name: file name or library name 1607 // type: the type of this input file. 1608 // extra_search_path: an extra directory to look for the file, prior 1609 // to checking the normal library search path. If this is "", 1610 // then no extra directory is added. 1611 // just_symbols: whether this file only defines symbols. 1612 // options: The position dependent options at this point in the 1613 // command line, such as --whole-archive. 1614 Input_file_argument() 1615 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""), 1616 just_symbols_(false), options_(), arg_serial_(0) 1617 { } 1618 1619 Input_file_argument(const char* name, Input_file_type type, 1620 const char* extra_search_path, 1621 bool just_symbols, 1622 const Position_dependent_options& options) 1623 : name_(name), type_(type), extra_search_path_(extra_search_path), 1624 just_symbols_(just_symbols), options_(options), arg_serial_(0) 1625 { } 1626 1627 // You can also pass in a General_options instance instead of a 1628 // Position_dependent_options. In that case, we extract the 1629 // position-independent vars from the General_options and only store 1630 // those. 1631 Input_file_argument(const char* name, Input_file_type type, 1632 const char* extra_search_path, 1633 bool just_symbols, 1634 const General_options& options) 1635 : name_(name), type_(type), extra_search_path_(extra_search_path), 1636 just_symbols_(just_symbols), options_(options), arg_serial_(0) 1637 { } 1638 1639 const char* 1640 name() const 1641 { return this->name_.c_str(); } 1642 1643 const Position_dependent_options& 1644 options() const 1645 { return this->options_; } 1646 1647 bool 1648 is_lib() const 1649 { return type_ == INPUT_FILE_TYPE_LIBRARY; } 1650 1651 bool 1652 is_searched_file() const 1653 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; } 1654 1655 const char* 1656 extra_search_path() const 1657 { 1658 return (this->extra_search_path_.empty() 1659 ? NULL 1660 : this->extra_search_path_.c_str()); 1661 } 1662 1663 // Return whether we should only read symbols from this file. 1664 bool 1665 just_symbols() const 1666 { return this->just_symbols_; } 1667 1668 // Return whether this file may require a search using the -L 1669 // options. 1670 bool 1671 may_need_search() const 1672 { 1673 return (this->is_lib() 1674 || this->is_searched_file() 1675 || !this->extra_search_path_.empty()); 1676 } 1677 1678 // Set the serial number for this argument. 1679 void 1680 set_arg_serial(unsigned int arg_serial) 1681 { this->arg_serial_ = arg_serial; } 1682 1683 // Get the serial number. 1684 unsigned int 1685 arg_serial() const 1686 { return this->arg_serial_; } 1687 1688 private: 1689 // We use std::string, not const char*, here for convenience when 1690 // using script files, so that we do not have to preserve the string 1691 // in that case. 1692 std::string name_; 1693 Input_file_type type_; 1694 std::string extra_search_path_; 1695 bool just_symbols_; 1696 Position_dependent_options options_; 1697 // A unique index for this file argument in the argument list. 1698 unsigned int arg_serial_; 1699 }; 1700 1701 // A file or library, or a group, from the command line. 1702 1703 class Input_argument 1704 { 1705 public: 1706 // Create a file or library argument. 1707 explicit Input_argument(Input_file_argument file) 1708 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL) 1709 { } 1710 1711 // Create a group argument. 1712 explicit Input_argument(Input_file_group* group) 1713 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL) 1714 { } 1715 1716 // Create a lib argument. 1717 explicit Input_argument(Input_file_lib* lib) 1718 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL) 1719 { } 1720 1721 // Return whether this is a file. 1722 bool 1723 is_file() const 1724 { return this->is_file_; } 1725 1726 // Return whether this is a group. 1727 bool 1728 is_group() const 1729 { return !this->is_file_ && this->lib_ == NULL; } 1730 1731 // Return whether this is a lib. 1732 bool 1733 is_lib() const 1734 { return this->lib_ != NULL; } 1735 1736 // Return the information about the file. 1737 const Input_file_argument& 1738 file() const 1739 { 1740 gold_assert(this->is_file_); 1741 return this->file_; 1742 } 1743 1744 // Return the information about the group. 1745 const Input_file_group* 1746 group() const 1747 { 1748 gold_assert(!this->is_file_); 1749 return this->group_; 1750 } 1751 1752 Input_file_group* 1753 group() 1754 { 1755 gold_assert(!this->is_file_); 1756 return this->group_; 1757 } 1758 1759 // Return the information about the lib. 1760 const Input_file_lib* 1761 lib() const 1762 { 1763 gold_assert(!this->is_file_); 1764 gold_assert(this->lib_); 1765 return this->lib_; 1766 } 1767 1768 Input_file_lib* 1769 lib() 1770 { 1771 gold_assert(!this->is_file_); 1772 gold_assert(this->lib_); 1773 return this->lib_; 1774 } 1775 1776 // If a script generated this argument, store a pointer to the script info. 1777 // Currently used only for recording incremental link information. 1778 void 1779 set_script_info(Script_info* info) 1780 { this->script_info_ = info; } 1781 1782 Script_info* 1783 script_info() const 1784 { return this->script_info_; } 1785 1786 private: 1787 bool is_file_; 1788 Input_file_argument file_; 1789 Input_file_group* group_; 1790 Input_file_lib* lib_; 1791 Script_info* script_info_; 1792 }; 1793 1794 typedef std::vector<Input_argument> Input_argument_list; 1795 1796 // A group from the command line. This is a set of arguments within 1797 // --start-group ... --end-group. 1798 1799 class Input_file_group 1800 { 1801 public: 1802 typedef Input_argument_list::const_iterator const_iterator; 1803 1804 Input_file_group() 1805 : files_() 1806 { } 1807 1808 // Add a file to the end of the group. 1809 Input_argument& 1810 add_file(const Input_file_argument& arg) 1811 { 1812 this->files_.push_back(Input_argument(arg)); 1813 return this->files_.back(); 1814 } 1815 1816 // Iterators to iterate over the group contents. 1817 1818 const_iterator 1819 begin() const 1820 { return this->files_.begin(); } 1821 1822 const_iterator 1823 end() const 1824 { return this->files_.end(); } 1825 1826 private: 1827 Input_argument_list files_; 1828 }; 1829 1830 // A lib from the command line. This is a set of arguments within 1831 // --start-lib ... --end-lib. 1832 1833 class Input_file_lib 1834 { 1835 public: 1836 typedef Input_argument_list::const_iterator const_iterator; 1837 1838 Input_file_lib(const Position_dependent_options& options) 1839 : files_(), options_(options) 1840 { } 1841 1842 // Add a file to the end of the lib. 1843 Input_argument& 1844 add_file(const Input_file_argument& arg) 1845 { 1846 this->files_.push_back(Input_argument(arg)); 1847 return this->files_.back(); 1848 } 1849 1850 const Position_dependent_options& 1851 options() const 1852 { return this->options_; } 1853 1854 // Iterators to iterate over the lib contents. 1855 1856 const_iterator 1857 begin() const 1858 { return this->files_.begin(); } 1859 1860 const_iterator 1861 end() const 1862 { return this->files_.end(); } 1863 1864 size_t 1865 size() const 1866 { return this->files_.size(); } 1867 1868 private: 1869 Input_argument_list files_; 1870 Position_dependent_options options_; 1871 }; 1872 1873 // A list of files from the command line or a script. 1874 1875 class Input_arguments 1876 { 1877 public: 1878 typedef Input_argument_list::const_iterator const_iterator; 1879 1880 Input_arguments() 1881 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0) 1882 { } 1883 1884 // Add a file. 1885 Input_argument& 1886 add_file(Input_file_argument& arg); 1887 1888 // Start a group (the --start-group option). 1889 void 1890 start_group(); 1891 1892 // End a group (the --end-group option). 1893 void 1894 end_group(); 1895 1896 // Start a lib (the --start-lib option). 1897 void 1898 start_lib(const Position_dependent_options&); 1899 1900 // End a lib (the --end-lib option). 1901 void 1902 end_lib(); 1903 1904 // Return whether we are currently in a group. 1905 bool 1906 in_group() const 1907 { return this->in_group_; } 1908 1909 // Return whether we are currently in a lib. 1910 bool 1911 in_lib() const 1912 { return this->in_lib_; } 1913 1914 // The number of entries in the list. 1915 int 1916 size() const 1917 { return this->input_argument_list_.size(); } 1918 1919 // Iterators to iterate over the list of input files. 1920 1921 const_iterator 1922 begin() const 1923 { return this->input_argument_list_.begin(); } 1924 1925 const_iterator 1926 end() const 1927 { return this->input_argument_list_.end(); } 1928 1929 // Return whether the list is empty. 1930 bool 1931 empty() const 1932 { return this->input_argument_list_.empty(); } 1933 1934 // Return the number of input files. This may be larger than 1935 // input_argument_list_.size(), because of files that are part 1936 // of groups or libs. 1937 int 1938 number_of_input_files() const 1939 { return this->file_count_; } 1940 1941 private: 1942 Input_argument_list input_argument_list_; 1943 bool in_group_; 1944 bool in_lib_; 1945 unsigned int file_count_; 1946 }; 1947 1948 1949 // All the information read from the command line. These are held in 1950 // three separate structs: one to hold the options (--foo), one to 1951 // hold the filenames listed on the commandline, and one to hold 1952 // linker script information. This third is not a subset of the other 1953 // two because linker scripts can be specified either as options (via 1954 // -T) or as a file. 1955 1956 class Command_line 1957 { 1958 public: 1959 typedef Input_arguments::const_iterator const_iterator; 1960 1961 Command_line(); 1962 1963 // Process the command line options. This will exit with an 1964 // appropriate error message if an unrecognized option is seen. 1965 void 1966 process(int argc, const char** argv); 1967 1968 // Process one command-line option. This takes the index of argv to 1969 // process, and returns the index for the next option. no_more_options 1970 // is set to true if argv[i] is "--". 1971 int 1972 process_one_option(int argc, const char** argv, int i, 1973 bool* no_more_options); 1974 1975 // Get the general options. 1976 const General_options& 1977 options() const 1978 { return this->options_; } 1979 1980 // Get the position dependent options. 1981 const Position_dependent_options& 1982 position_dependent_options() const 1983 { return this->position_options_; } 1984 1985 // Get the linker-script options. 1986 Script_options& 1987 script_options() 1988 { return this->script_options_; } 1989 1990 // Finalize the version-script options and return them. 1991 const Version_script_info& 1992 version_script(); 1993 1994 // Get the input files. 1995 Input_arguments& 1996 inputs() 1997 { return this->inputs_; } 1998 1999 // The number of input files. 2000 int 2001 number_of_input_files() const 2002 { return this->inputs_.number_of_input_files(); } 2003 2004 // Iterators to iterate over the list of input files. 2005 2006 const_iterator 2007 begin() const 2008 { return this->inputs_.begin(); } 2009 2010 const_iterator 2011 end() const 2012 { return this->inputs_.end(); } 2013 2014 private: 2015 Command_line(const Command_line&); 2016 Command_line& operator=(const Command_line&); 2017 2018 // This is a dummy class to provide a constructor that runs before 2019 // the constructor for the General_options. The Pre_options constructor 2020 // is used as a hook to set the flag enabling the options to register 2021 // themselves. 2022 struct Pre_options { 2023 Pre_options(); 2024 }; 2025 2026 // This must come before options_! 2027 Pre_options pre_options_; 2028 General_options options_; 2029 Position_dependent_options position_options_; 2030 Script_options script_options_; 2031 Input_arguments inputs_; 2032 }; 2033 2034 } // End namespace gold. 2035 2036 #endif // !defined(GOLD_OPTIONS_H) 2037