| 1 | // options.c -- handle command line options for gold |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013 |
| 4 | // Free Software Foundation, Inc. |
| 5 | // Written by Ian Lance Taylor <iant@google.com>. |
| 6 | |
| 7 | // This file is part of gold. |
| 8 | |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; either version 3 of the License, or |
| 12 | // (at your option) any later version. |
| 13 | |
| 14 | // This program is distributed in the hope that it will be useful, |
| 15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | // GNU General Public License for more details. |
| 18 | |
| 19 | // You should have received a copy of the GNU General Public License |
| 20 | // along with this program; if not, write to the Free Software |
| 21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | // MA 02110-1301, USA. |
| 23 | |
| 24 | #include "gold.h" |
| 25 | |
| 26 | #include <cerrno> |
| 27 | #include <cstdlib> |
| 28 | #include <cstring> |
| 29 | #include <fstream> |
| 30 | #include <vector> |
| 31 | #include <iostream> |
| 32 | #include <sys/stat.h> |
| 33 | #include "filenames.h" |
| 34 | #include "libiberty.h" |
| 35 | #include "demangle.h" |
| 36 | #include "../bfd/bfdver.h" |
| 37 | |
| 38 | #include "debug.h" |
| 39 | #include "script.h" |
| 40 | #include "target-select.h" |
| 41 | #include "options.h" |
| 42 | #include "plugin.h" |
| 43 | |
| 44 | namespace gold |
| 45 | { |
| 46 | |
| 47 | General_options |
| 48 | Position_dependent_options::default_options_; |
| 49 | |
| 50 | namespace options |
| 51 | { |
| 52 | |
| 53 | // This flag is TRUE if we should register the command-line options as they |
| 54 | // are constructed. It is set after construction of the options within |
| 55 | // class Position_dependent_options. |
| 56 | static bool ready_to_register = false; |
| 57 | |
| 58 | // This global variable is set up as General_options is constructed. |
| 59 | static std::vector<const One_option*> registered_options; |
| 60 | |
| 61 | // These are set up at the same time -- the variables that accept one |
| 62 | // dash, two, or require -z. A single variable may be in more than |
| 63 | // one of these data structures. |
| 64 | typedef Unordered_map<std::string, One_option*> Option_map; |
| 65 | static Option_map* long_options = NULL; |
| 66 | static One_option* short_options[128]; |
| 67 | |
| 68 | void |
| 69 | One_option::register_option() |
| 70 | { |
| 71 | if (!ready_to_register) |
| 72 | return; |
| 73 | |
| 74 | registered_options.push_back(this); |
| 75 | |
| 76 | // We can't make long_options a static Option_map because we can't |
| 77 | // guarantee that will be initialized before register_option() is |
| 78 | // first called. |
| 79 | if (long_options == NULL) |
| 80 | long_options = new Option_map; |
| 81 | |
| 82 | // TWO_DASHES means that two dashes are preferred, but one is ok too. |
| 83 | if (!this->longname.empty()) |
| 84 | (*long_options)[this->longname] = this; |
| 85 | |
| 86 | const int shortname_as_int = static_cast<int>(this->shortname); |
| 87 | gold_assert(shortname_as_int >= 0 && shortname_as_int < 128); |
| 88 | if (this->shortname != '\0') |
| 89 | { |
| 90 | gold_assert(short_options[shortname_as_int] == NULL); |
| 91 | short_options[shortname_as_int] = this; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | void |
| 96 | One_option::print() const |
| 97 | { |
| 98 | bool comma = false; |
| 99 | printf(" "); |
| 100 | int len = 2; |
| 101 | if (this->shortname != '\0') |
| 102 | { |
| 103 | len += printf("-%c", this->shortname); |
| 104 | if (this->helparg) |
| 105 | { |
| 106 | // -z takes long-names only. |
| 107 | gold_assert(this->dashes != DASH_Z); |
| 108 | len += printf(" %s", gettext(this->helparg)); |
| 109 | } |
| 110 | comma = true; |
| 111 | } |
| 112 | if (!this->longname.empty() |
| 113 | && !(this->longname[0] == this->shortname |
| 114 | && this->longname[1] == '\0')) |
| 115 | { |
| 116 | if (comma) |
| 117 | len += printf(", "); |
| 118 | switch (this->dashes) |
| 119 | { |
| 120 | case options::ONE_DASH: case options::EXACTLY_ONE_DASH: |
| 121 | len += printf("-"); |
| 122 | break; |
| 123 | case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES: |
| 124 | len += printf("--"); |
| 125 | break; |
| 126 | case options::DASH_Z: |
| 127 | len += printf("-z "); |
| 128 | break; |
| 129 | default: |
| 130 | gold_unreachable(); |
| 131 | } |
| 132 | len += printf("%s", this->longname.c_str()); |
| 133 | if (this->helparg) |
| 134 | { |
| 135 | // For most options, we print "--frob FOO". But for -z |
| 136 | // we print "-z frob=FOO". |
| 137 | len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ', |
| 138 | gettext(this->helparg)); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | if (len >= 30) |
| 143 | { |
| 144 | printf("\n"); |
| 145 | len = 0; |
| 146 | } |
| 147 | for (; len < 30; ++len) |
| 148 | std::putchar(' '); |
| 149 | |
| 150 | // TODO: if we're boolean, add " (default)" when appropriate. |
| 151 | printf("%s\n", gettext(this->helpstring)); |
| 152 | } |
| 153 | |
| 154 | void |
| 155 | help() |
| 156 | { |
| 157 | printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name); |
| 158 | |
| 159 | std::vector<const One_option*>::const_iterator it; |
| 160 | for (it = registered_options.begin(); it != registered_options.end(); ++it) |
| 161 | (*it)->print(); |
| 162 | |
| 163 | // config.guess and libtool.m4 look in ld --help output for the |
| 164 | // string "supported targets". |
| 165 | printf(_("%s: supported targets:"), gold::program_name); |
| 166 | std::vector<const char*> supported_names; |
| 167 | gold::supported_target_names(&supported_names); |
| 168 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 169 | p != supported_names.end(); |
| 170 | ++p) |
| 171 | printf(" %s", *p); |
| 172 | printf("\n"); |
| 173 | |
| 174 | printf(_("%s: supported emulations:"), gold::program_name); |
| 175 | supported_names.clear(); |
| 176 | gold::supported_emulation_names(&supported_names); |
| 177 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 178 | p != supported_names.end(); |
| 179 | ++p) |
| 180 | printf(" %s", *p); |
| 181 | printf("\n"); |
| 182 | |
| 183 | // REPORT_BUGS_TO is defined in bfd/bfdver.h. |
| 184 | const char* report = REPORT_BUGS_TO; |
| 185 | if (*report != '\0') |
| 186 | printf(_("Report bugs to %s\n"), report); |
| 187 | } |
| 188 | |
| 189 | // For bool, arg will be NULL (boolean options take no argument); |
| 190 | // we always just set to true. |
| 191 | void |
| 192 | parse_bool(const char*, const char*, bool* retval) |
| 193 | { |
| 194 | *retval = true; |
| 195 | } |
| 196 | |
| 197 | void |
| 198 | parse_uint(const char* option_name, const char* arg, int* retval) |
| 199 | { |
| 200 | char* endptr; |
| 201 | *retval = strtol(arg, &endptr, 0); |
| 202 | if (*endptr != '\0' || *retval < 0) |
| 203 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), |
| 204 | option_name, arg); |
| 205 | } |
| 206 | |
| 207 | void |
| 208 | parse_int(const char* option_name, const char* arg, int* retval) |
| 209 | { |
| 210 | char* endptr; |
| 211 | *retval = strtol(arg, &endptr, 0); |
| 212 | if (*endptr != '\0') |
| 213 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), |
| 214 | option_name, arg); |
| 215 | } |
| 216 | |
| 217 | void |
| 218 | parse_uint64(const char* option_name, const char* arg, uint64_t* retval) |
| 219 | { |
| 220 | char* endptr; |
| 221 | *retval = strtoull(arg, &endptr, 0); |
| 222 | if (*endptr != '\0') |
| 223 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), |
| 224 | option_name, arg); |
| 225 | } |
| 226 | |
| 227 | void |
| 228 | parse_double(const char* option_name, const char* arg, double* retval) |
| 229 | { |
| 230 | char* endptr; |
| 231 | *retval = strtod(arg, &endptr); |
| 232 | if (*endptr != '\0') |
| 233 | gold_fatal(_("%s: invalid option value " |
| 234 | "(expected a floating point number): %s"), |
| 235 | option_name, arg); |
| 236 | } |
| 237 | |
| 238 | void |
| 239 | parse_percent(const char* option_name, const char* arg, double* retval) |
| 240 | { |
| 241 | char* endptr; |
| 242 | *retval = strtod(arg, &endptr) / 100.0; |
| 243 | if (*endptr != '\0') |
| 244 | gold_fatal(_("%s: invalid option value " |
| 245 | "(expected a floating point number): %s"), |
| 246 | option_name, arg); |
| 247 | } |
| 248 | |
| 249 | void |
| 250 | parse_string(const char* option_name, const char* arg, const char** retval) |
| 251 | { |
| 252 | if (*arg == '\0') |
| 253 | gold_fatal(_("%s: must take a non-empty argument"), option_name); |
| 254 | *retval = arg; |
| 255 | } |
| 256 | |
| 257 | void |
| 258 | parse_optional_string(const char*, const char* arg, const char** retval) |
| 259 | { |
| 260 | *retval = arg; |
| 261 | } |
| 262 | |
| 263 | void |
| 264 | parse_dirlist(const char*, const char* arg, Dir_list* retval) |
| 265 | { |
| 266 | retval->push_back(Search_directory(arg, false)); |
| 267 | } |
| 268 | |
| 269 | void |
| 270 | parse_set(const char*, const char* arg, String_set* retval) |
| 271 | { |
| 272 | retval->insert(std::string(arg)); |
| 273 | } |
| 274 | |
| 275 | void |
| 276 | parse_choices(const char* option_name, const char* arg, const char** retval, |
| 277 | const char* choices[], int num_choices) |
| 278 | { |
| 279 | for (int i = 0; i < num_choices; i++) |
| 280 | if (strcmp(choices[i], arg) == 0) |
| 281 | { |
| 282 | *retval = arg; |
| 283 | return; |
| 284 | } |
| 285 | |
| 286 | // If we get here, the user did not enter a valid choice, so we die. |
| 287 | std::string choices_list; |
| 288 | for (int i = 0; i < num_choices; i++) |
| 289 | { |
| 290 | choices_list += choices[i]; |
| 291 | if (i != num_choices - 1) |
| 292 | choices_list += ", "; |
| 293 | } |
| 294 | gold_fatal(_("%s: must take one of the following arguments: %s"), |
| 295 | option_name, choices_list.c_str()); |
| 296 | } |
| 297 | |
| 298 | } // End namespace options. |
| 299 | |
| 300 | // Define the handler for "special" options (set via DEFINE_special). |
| 301 | |
| 302 | void |
| 303 | General_options::parse_help(const char*, const char*, Command_line*) |
| 304 | { |
| 305 | options::help(); |
| 306 | ::exit(EXIT_SUCCESS); |
| 307 | } |
| 308 | |
| 309 | void |
| 310 | General_options::parse_version(const char* opt, const char*, Command_line*) |
| 311 | { |
| 312 | bool print_short = (opt[0] == '-' && opt[1] == 'v'); |
| 313 | gold::print_version(print_short); |
| 314 | this->printed_version_ = true; |
| 315 | if (!print_short) |
| 316 | ::exit(EXIT_SUCCESS); |
| 317 | } |
| 318 | |
| 319 | void |
| 320 | General_options::parse_V(const char*, const char*, Command_line*) |
| 321 | { |
| 322 | gold::print_version(true); |
| 323 | this->printed_version_ = true; |
| 324 | |
| 325 | printf(_(" Supported targets:\n")); |
| 326 | std::vector<const char*> supported_names; |
| 327 | gold::supported_target_names(&supported_names); |
| 328 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 329 | p != supported_names.end(); |
| 330 | ++p) |
| 331 | printf(" %s\n", *p); |
| 332 | |
| 333 | printf(_(" Supported emulations:\n")); |
| 334 | supported_names.clear(); |
| 335 | gold::supported_emulation_names(&supported_names); |
| 336 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 337 | p != supported_names.end(); |
| 338 | ++p) |
| 339 | printf(" %s\n", *p); |
| 340 | } |
| 341 | |
| 342 | void |
| 343 | General_options::parse_defsym(const char*, const char* arg, |
| 344 | Command_line* cmdline) |
| 345 | { |
| 346 | cmdline->script_options().define_symbol(arg); |
| 347 | } |
| 348 | |
| 349 | void |
| 350 | General_options::parse_incremental(const char*, const char*, |
| 351 | Command_line*) |
| 352 | { |
| 353 | this->incremental_mode_ = INCREMENTAL_AUTO; |
| 354 | } |
| 355 | |
| 356 | void |
| 357 | General_options::parse_no_incremental(const char*, const char*, |
| 358 | Command_line*) |
| 359 | { |
| 360 | this->incremental_mode_ = INCREMENTAL_OFF; |
| 361 | } |
| 362 | |
| 363 | void |
| 364 | General_options::parse_incremental_full(const char*, const char*, |
| 365 | Command_line*) |
| 366 | { |
| 367 | this->incremental_mode_ = INCREMENTAL_FULL; |
| 368 | } |
| 369 | |
| 370 | void |
| 371 | General_options::parse_incremental_update(const char*, const char*, |
| 372 | Command_line*) |
| 373 | { |
| 374 | this->incremental_mode_ = INCREMENTAL_UPDATE; |
| 375 | } |
| 376 | |
| 377 | void |
| 378 | General_options::parse_incremental_changed(const char*, const char*, |
| 379 | Command_line*) |
| 380 | { |
| 381 | this->implicit_incremental_ = true; |
| 382 | this->incremental_disposition_ = INCREMENTAL_CHANGED; |
| 383 | } |
| 384 | |
| 385 | void |
| 386 | General_options::parse_incremental_unchanged(const char*, const char*, |
| 387 | Command_line*) |
| 388 | { |
| 389 | this->implicit_incremental_ = true; |
| 390 | this->incremental_disposition_ = INCREMENTAL_UNCHANGED; |
| 391 | } |
| 392 | |
| 393 | void |
| 394 | General_options::parse_incremental_unknown(const char*, const char*, |
| 395 | Command_line*) |
| 396 | { |
| 397 | this->implicit_incremental_ = true; |
| 398 | this->incremental_disposition_ = INCREMENTAL_CHECK; |
| 399 | } |
| 400 | |
| 401 | void |
| 402 | General_options::parse_incremental_startup_unchanged(const char*, const char*, |
| 403 | Command_line*) |
| 404 | { |
| 405 | this->implicit_incremental_ = true; |
| 406 | this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED; |
| 407 | } |
| 408 | |
| 409 | void |
| 410 | General_options::parse_library(const char*, const char* arg, |
| 411 | Command_line* cmdline) |
| 412 | { |
| 413 | Input_file_argument::Input_file_type type; |
| 414 | const char* name; |
| 415 | if (arg[0] == ':') |
| 416 | { |
| 417 | type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE; |
| 418 | name = arg + 1; |
| 419 | } |
| 420 | else |
| 421 | { |
| 422 | type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY; |
| 423 | name = arg; |
| 424 | } |
| 425 | Input_file_argument file(name, type, "", false, *this); |
| 426 | cmdline->inputs().add_file(file); |
| 427 | } |
| 428 | |
| 429 | #ifdef ENABLE_PLUGINS |
| 430 | void |
| 431 | General_options::parse_plugin(const char*, const char* arg, |
| 432 | Command_line*) |
| 433 | { |
| 434 | this->add_plugin(arg); |
| 435 | } |
| 436 | |
| 437 | // Parse --plugin-opt. |
| 438 | |
| 439 | void |
| 440 | General_options::parse_plugin_opt(const char*, const char* arg, |
| 441 | Command_line*) |
| 442 | { |
| 443 | this->add_plugin_option(arg); |
| 444 | } |
| 445 | #endif // ENABLE_PLUGINS |
| 446 | |
| 447 | void |
| 448 | General_options::parse_R(const char* option, const char* arg, |
| 449 | Command_line* cmdline) |
| 450 | { |
| 451 | struct stat s; |
| 452 | if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode)) |
| 453 | this->add_to_rpath(arg); |
| 454 | else |
| 455 | this->parse_just_symbols(option, arg, cmdline); |
| 456 | } |
| 457 | |
| 458 | void |
| 459 | General_options::parse_just_symbols(const char*, const char* arg, |
| 460 | Command_line* cmdline) |
| 461 | { |
| 462 | Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE, |
| 463 | "", true, *this); |
| 464 | cmdline->inputs().add_file(file); |
| 465 | } |
| 466 | |
| 467 | // Handle --section-start. |
| 468 | |
| 469 | void |
| 470 | General_options::parse_section_start(const char*, const char* arg, |
| 471 | Command_line*) |
| 472 | { |
| 473 | const char* eq = strchr(arg, '='); |
| 474 | if (eq == NULL) |
| 475 | { |
| 476 | gold_error(_("invalid argument to --section-start; " |
| 477 | "must be SECTION=ADDRESS")); |
| 478 | return; |
| 479 | } |
| 480 | |
| 481 | std::string section_name(arg, eq - arg); |
| 482 | |
| 483 | ++eq; |
| 484 | const char* val_start = eq; |
| 485 | if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X')) |
| 486 | eq += 2; |
| 487 | if (*eq == '\0') |
| 488 | { |
| 489 | gold_error(_("--section-start address missing")); |
| 490 | return; |
| 491 | } |
| 492 | uint64_t addr = 0; |
| 493 | hex_init(); |
| 494 | for (; *eq != '\0'; ++eq) |
| 495 | { |
| 496 | if (!hex_p(*eq)) |
| 497 | { |
| 498 | gold_error(_("--section-start argument %s is not a valid hex number"), |
| 499 | val_start); |
| 500 | return; |
| 501 | } |
| 502 | addr <<= 4; |
| 503 | addr += hex_value(*eq); |
| 504 | } |
| 505 | |
| 506 | this->section_starts_[section_name] = addr; |
| 507 | } |
| 508 | |
| 509 | // Look up a --section-start value. |
| 510 | |
| 511 | bool |
| 512 | General_options::section_start(const char* secname, uint64_t* paddr) const |
| 513 | { |
| 514 | if (this->section_starts_.empty()) |
| 515 | return false; |
| 516 | std::map<std::string, uint64_t>::const_iterator p = |
| 517 | this->section_starts_.find(secname); |
| 518 | if (p == this->section_starts_.end()) |
| 519 | return false; |
| 520 | *paddr = p->second; |
| 521 | return true; |
| 522 | } |
| 523 | |
| 524 | void |
| 525 | General_options::parse_static(const char*, const char*, Command_line*) |
| 526 | { |
| 527 | this->set_static(true); |
| 528 | } |
| 529 | |
| 530 | void |
| 531 | General_options::parse_script(const char*, const char* arg, |
| 532 | Command_line* cmdline) |
| 533 | { |
| 534 | if (!read_commandline_script(arg, cmdline)) |
| 535 | gold::gold_fatal(_("unable to parse script file %s"), arg); |
| 536 | } |
| 537 | |
| 538 | void |
| 539 | General_options::parse_version_script(const char*, const char* arg, |
| 540 | Command_line* cmdline) |
| 541 | { |
| 542 | if (!read_version_script(arg, cmdline)) |
| 543 | gold::gold_fatal(_("unable to parse version script file %s"), arg); |
| 544 | } |
| 545 | |
| 546 | void |
| 547 | General_options::parse_dynamic_list(const char*, const char* arg, |
| 548 | Command_line* cmdline) |
| 549 | { |
| 550 | if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_)) |
| 551 | gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg); |
| 552 | } |
| 553 | |
| 554 | void |
| 555 | General_options::parse_start_group(const char*, const char*, |
| 556 | Command_line* cmdline) |
| 557 | { |
| 558 | cmdline->inputs().start_group(); |
| 559 | } |
| 560 | |
| 561 | void |
| 562 | General_options::parse_end_group(const char*, const char*, |
| 563 | Command_line* cmdline) |
| 564 | { |
| 565 | cmdline->inputs().end_group(); |
| 566 | } |
| 567 | |
| 568 | void |
| 569 | General_options::parse_start_lib(const char*, const char*, |
| 570 | Command_line* cmdline) |
| 571 | { |
| 572 | cmdline->inputs().start_lib(cmdline->position_dependent_options()); |
| 573 | } |
| 574 | |
| 575 | void |
| 576 | General_options::parse_end_lib(const char*, const char*, |
| 577 | Command_line* cmdline) |
| 578 | { |
| 579 | cmdline->inputs().end_lib(); |
| 580 | } |
| 581 | |
| 582 | // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list |
| 583 | // of names separated by commas or colons and puts them in a linked list. |
| 584 | // We implement the same parsing of names here but store names in an unordered |
| 585 | // map to speed up searching of names. |
| 586 | |
| 587 | void |
| 588 | General_options::parse_exclude_libs(const char*, const char* arg, |
| 589 | Command_line*) |
| 590 | { |
| 591 | const char* p = arg; |
| 592 | |
| 593 | while (*p != '\0') |
| 594 | { |
| 595 | size_t length = strcspn(p, ",:"); |
| 596 | this->excluded_libs_.insert(std::string(p, length)); |
| 597 | p += (p[length] ? length + 1 : length); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | // The checking logic is based on the function check_excluded_libs() in |
| 602 | // ld/ldlang.c of GNU ld but our implementation is different because we use |
| 603 | // an unordered map instead of a linked list, which is what GNU ld uses. GNU |
| 604 | // ld searches sequentially in the excluded libs list. For a given archive, |
| 605 | // a match is found if the archive's name matches exactly one of the list |
| 606 | // entry or if the archive's name is of the form FOO.a and FOO matches exactly |
| 607 | // one of the list entry. An entry "ALL" in the list is considered as a |
| 608 | // wild-card and matches any given name. |
| 609 | |
| 610 | bool |
| 611 | General_options::check_excluded_libs(const std::string &name) const |
| 612 | { |
| 613 | Unordered_set<std::string>::const_iterator p; |
| 614 | |
| 615 | // Exit early for the most common case. |
| 616 | if (excluded_libs_.empty()) |
| 617 | return false; |
| 618 | |
| 619 | // If we see "ALL", all archives are excluded from automatic export. |
| 620 | p = excluded_libs_.find(std::string("ALL")); |
| 621 | if (p != excluded_libs_.end()) |
| 622 | return true; |
| 623 | |
| 624 | // First strip off any directories in name. |
| 625 | const char* basename = lbasename(name.c_str()); |
| 626 | |
| 627 | // Try finding an exact match. |
| 628 | p = excluded_libs_.find(std::string(basename)); |
| 629 | if (p != excluded_libs_.end()) |
| 630 | return true; |
| 631 | |
| 632 | // Try matching NAME without ".a" at the end. |
| 633 | size_t length = strlen(basename); |
| 634 | if ((length >= 2) |
| 635 | && (basename[length - 2] == '.') |
| 636 | && (basename[length - 1] == 'a')) |
| 637 | { |
| 638 | p = excluded_libs_.find(std::string(basename, length - 2)); |
| 639 | if (p != excluded_libs_.end()) |
| 640 | return true; |
| 641 | } |
| 642 | |
| 643 | return false; |
| 644 | } |
| 645 | |
| 646 | // Recognize input and output target names. The GNU linker accepts |
| 647 | // these with --format and --oformat. This code is intended to be |
| 648 | // minimally compatible. In practice for an ELF target this would be |
| 649 | // the same target as the input files; that name always start with |
| 650 | // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex", |
| 651 | // "binary", "ihex". |
| 652 | |
| 653 | General_options::Object_format |
| 654 | General_options::string_to_object_format(const char* arg) |
| 655 | { |
| 656 | if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0) |
| 657 | return gold::General_options::OBJECT_FORMAT_ELF; |
| 658 | else if (strcmp(arg, "binary") == 0) |
| 659 | return gold::General_options::OBJECT_FORMAT_BINARY; |
| 660 | else |
| 661 | { |
| 662 | gold::gold_error(_("format '%s' not supported; treating as elf " |
| 663 | "(supported formats: elf, binary)"), |
| 664 | arg); |
| 665 | return gold::General_options::OBJECT_FORMAT_ELF; |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | void |
| 670 | General_options::parse_fix_v4bx(const char*, const char*, |
| 671 | Command_line*) |
| 672 | { |
| 673 | this->fix_v4bx_ = FIX_V4BX_REPLACE; |
| 674 | } |
| 675 | |
| 676 | void |
| 677 | General_options::parse_fix_v4bx_interworking(const char*, const char*, |
| 678 | Command_line*) |
| 679 | { |
| 680 | this->fix_v4bx_ = FIX_V4BX_INTERWORKING; |
| 681 | } |
| 682 | |
| 683 | void |
| 684 | General_options::parse_EB(const char*, const char*, Command_line*) |
| 685 | { |
| 686 | this->endianness_ = ENDIANNESS_BIG; |
| 687 | } |
| 688 | |
| 689 | void |
| 690 | General_options::parse_EL(const char*, const char*, Command_line*) |
| 691 | { |
| 692 | this->endianness_ = ENDIANNESS_LITTLE; |
| 693 | } |
| 694 | |
| 695 | } // End namespace gold. |
| 696 | |
| 697 | namespace |
| 698 | { |
| 699 | |
| 700 | void |
| 701 | usage() |
| 702 | { |
| 703 | fprintf(stderr, |
| 704 | _("%s: use the --help option for usage information\n"), |
| 705 | gold::program_name); |
| 706 | ::exit(EXIT_FAILURE); |
| 707 | } |
| 708 | |
| 709 | void |
| 710 | usage(const char* msg, const char* opt) |
| 711 | { |
| 712 | fprintf(stderr, |
| 713 | _("%s: %s: %s\n"), |
| 714 | gold::program_name, opt, msg); |
| 715 | usage(); |
| 716 | } |
| 717 | |
| 718 | // If the default sysroot is relocatable, try relocating it based on |
| 719 | // the prefix FROM. |
| 720 | |
| 721 | static char* |
| 722 | get_relative_sysroot(const char* from) |
| 723 | { |
| 724 | char* path = make_relative_prefix(gold::program_name, from, |
| 725 | TARGET_SYSTEM_ROOT); |
| 726 | if (path != NULL) |
| 727 | { |
| 728 | struct stat s; |
| 729 | if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode)) |
| 730 | return path; |
| 731 | free(path); |
| 732 | } |
| 733 | |
| 734 | return NULL; |
| 735 | } |
| 736 | |
| 737 | // Return the default sysroot. This is set by the --with-sysroot |
| 738 | // option to configure. Note we do not free the return value of |
| 739 | // get_relative_sysroot, which is a small memory leak, but is |
| 740 | // necessary since we store this pointer directly in General_options. |
| 741 | |
| 742 | static const char* |
| 743 | get_default_sysroot() |
| 744 | { |
| 745 | const char* sysroot = TARGET_SYSTEM_ROOT; |
| 746 | if (*sysroot == '\0') |
| 747 | return NULL; |
| 748 | |
| 749 | if (TARGET_SYSTEM_ROOT_RELOCATABLE) |
| 750 | { |
| 751 | char* path = get_relative_sysroot(BINDIR); |
| 752 | if (path == NULL) |
| 753 | path = get_relative_sysroot(TOOLBINDIR); |
| 754 | if (path != NULL) |
| 755 | return path; |
| 756 | } |
| 757 | |
| 758 | return sysroot; |
| 759 | } |
| 760 | |
| 761 | // Parse a long option. Such options have the form |
| 762 | // <-|--><option>[=arg]. If "=arg" is not present but the option |
| 763 | // takes an argument, the next word is taken to the be the argument. |
| 764 | // If equals_only is set, then only the <option>=<arg> form is |
| 765 | // accepted, not the <option><space><arg> form. Returns a One_option |
| 766 | // struct or NULL if argv[i] cannot be parsed as a long option. In |
| 767 | // the not-NULL case, *arg is set to the option's argument (NULL if |
| 768 | // the option takes no argument), and *i is advanced past this option. |
| 769 | // NOTE: it is safe for argv and arg to point to the same place. |
| 770 | gold::options::One_option* |
| 771 | parse_long_option(int argc, const char** argv, bool equals_only, |
| 772 | const char** arg, int* i) |
| 773 | { |
| 774 | const char* const this_argv = argv[*i]; |
| 775 | |
| 776 | const char* equals = strchr(this_argv, '='); |
| 777 | const char* option_start = this_argv + strspn(this_argv, "-"); |
| 778 | std::string option(option_start, |
| 779 | equals ? equals - option_start : strlen(option_start)); |
| 780 | |
| 781 | gold::options::Option_map::iterator it |
| 782 | = gold::options::long_options->find(option); |
| 783 | if (it == gold::options::long_options->end()) |
| 784 | return NULL; |
| 785 | |
| 786 | gold::options::One_option* retval = it->second; |
| 787 | |
| 788 | // If the dash-count doesn't match, we fail. |
| 789 | if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>" |
| 790 | { |
| 791 | if (retval->dashes != gold::options::DASH_Z) |
| 792 | return NULL; |
| 793 | } |
| 794 | else if (this_argv[1] != '-') // one dash |
| 795 | { |
| 796 | if (retval->dashes != gold::options::ONE_DASH |
| 797 | && retval->dashes != gold::options::EXACTLY_ONE_DASH |
| 798 | && retval->dashes != gold::options::TWO_DASHES) |
| 799 | return NULL; |
| 800 | } |
| 801 | else // two dashes (or more!) |
| 802 | { |
| 803 | if (retval->dashes != gold::options::TWO_DASHES |
| 804 | && retval->dashes != gold::options::EXACTLY_TWO_DASHES |
| 805 | && retval->dashes != gold::options::ONE_DASH) |
| 806 | return NULL; |
| 807 | } |
| 808 | |
| 809 | // Now that we know the option is good (or else bad in a way that |
| 810 | // will cause us to die), increment i to point past this argv. |
| 811 | ++(*i); |
| 812 | |
| 813 | // Figure out the option's argument, if any. |
| 814 | if (!retval->takes_argument()) |
| 815 | { |
| 816 | if (equals) |
| 817 | usage(_("unexpected argument"), this_argv); |
| 818 | else |
| 819 | *arg = NULL; |
| 820 | } |
| 821 | else |
| 822 | { |
| 823 | if (equals) |
| 824 | *arg = equals + 1; |
| 825 | else if (retval->takes_optional_argument()) |
| 826 | *arg = retval->default_value; |
| 827 | else if (*i < argc && !equals_only) |
| 828 | *arg = argv[(*i)++]; |
| 829 | else |
| 830 | usage(_("missing argument"), this_argv); |
| 831 | } |
| 832 | |
| 833 | return retval; |
| 834 | } |
| 835 | |
| 836 | // Parse a short option. Such options have the form -<option>[arg]. |
| 837 | // If "arg" is not present but the option takes an argument, the next |
| 838 | // word is taken to the be the argument. If the option does not take |
| 839 | // an argument, it may be followed by another short option. Returns a |
| 840 | // One_option struct or NULL if argv[i] cannot be parsed as a short |
| 841 | // option. In the not-NULL case, *arg is set to the option's argument |
| 842 | // (NULL if the option takes no argument), and *i is advanced past |
| 843 | // this option. This function keeps *i the same if we parsed a short |
| 844 | // option that does not take an argument, that looks to be followed by |
| 845 | // another short option in the same word. |
| 846 | gold::options::One_option* |
| 847 | parse_short_option(int argc, const char** argv, int pos_in_argv_i, |
| 848 | const char** arg, int* i) |
| 849 | { |
| 850 | const char* const this_argv = argv[*i]; |
| 851 | |
| 852 | if (this_argv[0] != '-') |
| 853 | return NULL; |
| 854 | |
| 855 | // We handle -z as a special case. |
| 856 | static gold::options::One_option dash_z("", gold::options::DASH_Z, |
| 857 | 'z', "", NULL, "Z-OPTION", false, |
| 858 | NULL); |
| 859 | gold::options::One_option* retval = NULL; |
| 860 | if (this_argv[pos_in_argv_i] == 'z') |
| 861 | retval = &dash_z; |
| 862 | else |
| 863 | { |
| 864 | const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]); |
| 865 | if (char_as_int > 0 && char_as_int < 128) |
| 866 | retval = gold::options::short_options[char_as_int]; |
| 867 | } |
| 868 | |
| 869 | if (retval == NULL) |
| 870 | return NULL; |
| 871 | |
| 872 | // Figure out the option's argument, if any. |
| 873 | if (!retval->takes_argument()) |
| 874 | { |
| 875 | *arg = NULL; |
| 876 | // We only advance past this argument if it's the only one in argv. |
| 877 | if (this_argv[pos_in_argv_i + 1] == '\0') |
| 878 | ++(*i); |
| 879 | } |
| 880 | else |
| 881 | { |
| 882 | // If we take an argument, we'll eat up this entire argv entry. |
| 883 | ++(*i); |
| 884 | if (this_argv[pos_in_argv_i + 1] != '\0') |
| 885 | *arg = this_argv + pos_in_argv_i + 1; |
| 886 | else if (retval->takes_optional_argument()) |
| 887 | *arg = retval->default_value; |
| 888 | else if (*i < argc) |
| 889 | *arg = argv[(*i)++]; |
| 890 | else |
| 891 | usage(_("missing argument"), this_argv); |
| 892 | } |
| 893 | |
| 894 | // If we're a -z option, we need to parse our argument as a |
| 895 | // long-option, e.g. "-z stacksize=8192". |
| 896 | if (retval == &dash_z) |
| 897 | { |
| 898 | int dummy_i = 0; |
| 899 | const char* dash_z_arg = *arg; |
| 900 | retval = parse_long_option(1, arg, true, arg, &dummy_i); |
| 901 | if (retval == NULL) |
| 902 | usage(_("unknown -z option"), dash_z_arg); |
| 903 | } |
| 904 | |
| 905 | return retval; |
| 906 | } |
| 907 | |
| 908 | } // End anonymous namespace. |
| 909 | |
| 910 | namespace gold |
| 911 | { |
| 912 | |
| 913 | General_options::General_options() |
| 914 | : printed_version_(false), |
| 915 | execstack_status_(EXECSTACK_FROM_INPUT), |
| 916 | icf_status_(ICF_NONE), |
| 917 | static_(false), |
| 918 | do_demangle_(false), |
| 919 | plugins_(NULL), |
| 920 | dynamic_list_(), |
| 921 | incremental_mode_(INCREMENTAL_OFF), |
| 922 | incremental_disposition_(INCREMENTAL_STARTUP), |
| 923 | incremental_startup_disposition_(INCREMENTAL_CHECK), |
| 924 | implicit_incremental_(false), |
| 925 | excluded_libs_(), |
| 926 | symbols_to_retain_(), |
| 927 | section_starts_(), |
| 928 | fix_v4bx_(FIX_V4BX_NONE), |
| 929 | endianness_(ENDIANNESS_NOT_SET) |
| 930 | { |
| 931 | // Turn off option registration once construction is complete. |
| 932 | gold::options::ready_to_register = false; |
| 933 | } |
| 934 | |
| 935 | General_options::Object_format |
| 936 | General_options::format_enum() const |
| 937 | { |
| 938 | return General_options::string_to_object_format(this->format()); |
| 939 | } |
| 940 | |
| 941 | General_options::Object_format |
| 942 | General_options::oformat_enum() const |
| 943 | { |
| 944 | return General_options::string_to_object_format(this->oformat()); |
| 945 | } |
| 946 | |
| 947 | // Add the sysroot, if any, to the search paths. |
| 948 | |
| 949 | void |
| 950 | General_options::add_sysroot() |
| 951 | { |
| 952 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') |
| 953 | { |
| 954 | this->set_sysroot(get_default_sysroot()); |
| 955 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') |
| 956 | return; |
| 957 | } |
| 958 | |
| 959 | char* canonical_sysroot = lrealpath(this->sysroot()); |
| 960 | |
| 961 | for (Dir_list::iterator p = this->library_path_.value.begin(); |
| 962 | p != this->library_path_.value.end(); |
| 963 | ++p) |
| 964 | p->add_sysroot(this->sysroot(), canonical_sysroot); |
| 965 | |
| 966 | free(canonical_sysroot); |
| 967 | } |
| 968 | |
| 969 | // Return whether FILENAME is in a system directory. |
| 970 | |
| 971 | bool |
| 972 | General_options::is_in_system_directory(const std::string& filename) const |
| 973 | { |
| 974 | for (Dir_list::const_iterator p = this->library_path_.value.begin(); |
| 975 | p != this->library_path_.value.end(); |
| 976 | ++p) |
| 977 | { |
| 978 | // We use a straight string comparison rather than calling |
| 979 | // FILENAME_CMP because we are only interested in the cases |
| 980 | // where we found the file in a system directory, which means |
| 981 | // that we used the directory name as a prefix for a -L search. |
| 982 | if (p->is_system_directory() |
| 983 | && filename.compare(0, p->name().size(), p->name()) == 0) |
| 984 | return true; |
| 985 | } |
| 986 | return false; |
| 987 | } |
| 988 | |
| 989 | // Add a plugin to the list of plugins. |
| 990 | |
| 991 | void |
| 992 | General_options::add_plugin(const char* filename) |
| 993 | { |
| 994 | if (this->plugins_ == NULL) |
| 995 | this->plugins_ = new Plugin_manager(*this); |
| 996 | this->plugins_->add_plugin(filename); |
| 997 | } |
| 998 | |
| 999 | // Add a plugin option to a plugin. |
| 1000 | |
| 1001 | void |
| 1002 | General_options::add_plugin_option(const char* arg) |
| 1003 | { |
| 1004 | if (this->plugins_ == NULL) |
| 1005 | gold_fatal("--plugin-opt requires --plugin."); |
| 1006 | this->plugins_->add_plugin_option(arg); |
| 1007 | } |
| 1008 | |
| 1009 | // Set up variables and other state that isn't set up automatically by |
| 1010 | // the parse routine, and ensure options don't contradict each other |
| 1011 | // and are otherwise kosher. |
| 1012 | |
| 1013 | void |
| 1014 | General_options::finalize() |
| 1015 | { |
| 1016 | // Normalize the strip modifiers. They have a total order: |
| 1017 | // strip_all > strip_debug > strip_non_line > strip_debug_gdb. |
| 1018 | // If one is true, set all beneath it to true as well. |
| 1019 | if (this->strip_all()) |
| 1020 | this->set_strip_debug(true); |
| 1021 | if (this->strip_debug()) |
| 1022 | this->set_strip_debug_non_line(true); |
| 1023 | if (this->strip_debug_non_line()) |
| 1024 | this->set_strip_debug_gdb(true); |
| 1025 | |
| 1026 | if (this->Bshareable()) |
| 1027 | this->set_shared(true); |
| 1028 | |
| 1029 | // If the user specifies both -s and -r, convert the -s to -S. |
| 1030 | // -r requires us to keep externally visible symbols! |
| 1031 | if (this->strip_all() && this->relocatable()) |
| 1032 | { |
| 1033 | this->set_strip_all(false); |
| 1034 | gold_assert(this->strip_debug()); |
| 1035 | } |
| 1036 | |
| 1037 | // For us, -dc and -dp are synonyms for --define-common. |
| 1038 | if (this->dc()) |
| 1039 | this->set_define_common(true); |
| 1040 | if (this->dp()) |
| 1041 | this->set_define_common(true); |
| 1042 | |
| 1043 | // We also set --define-common if we're not relocatable, as long as |
| 1044 | // the user didn't explicitly ask for something different. |
| 1045 | if (!this->user_set_define_common()) |
| 1046 | this->set_define_common(!this->relocatable()); |
| 1047 | |
| 1048 | // execstack_status_ is a three-state variable; update it based on |
| 1049 | // -z [no]execstack. |
| 1050 | if (this->execstack()) |
| 1051 | this->set_execstack_status(EXECSTACK_YES); |
| 1052 | else if (this->noexecstack()) |
| 1053 | this->set_execstack_status(EXECSTACK_NO); |
| 1054 | |
| 1055 | // icf_status_ is a three-state variable; update it based on the |
| 1056 | // value of this->icf(). |
| 1057 | if (strcmp(this->icf(), "none") == 0) |
| 1058 | this->set_icf_status(ICF_NONE); |
| 1059 | else if (strcmp(this->icf(), "safe") == 0) |
| 1060 | this->set_icf_status(ICF_SAFE); |
| 1061 | else |
| 1062 | this->set_icf_status(ICF_ALL); |
| 1063 | |
| 1064 | // Handle the optional argument for --demangle. |
| 1065 | if (this->user_set_demangle()) |
| 1066 | { |
| 1067 | this->set_do_demangle(true); |
| 1068 | const char* style = this->demangle(); |
| 1069 | if (*style != '\0') |
| 1070 | { |
| 1071 | enum demangling_styles style_code; |
| 1072 | |
| 1073 | style_code = cplus_demangle_name_to_style(style); |
| 1074 | if (style_code == unknown_demangling) |
| 1075 | gold_fatal("unknown demangling style '%s'", style); |
| 1076 | cplus_demangle_set_style(style_code); |
| 1077 | } |
| 1078 | } |
| 1079 | else if (this->user_set_no_demangle()) |
| 1080 | this->set_do_demangle(false); |
| 1081 | else |
| 1082 | { |
| 1083 | // Testing COLLECT_NO_DEMANGLE makes our default demangling |
| 1084 | // behaviour identical to that of gcc's linker wrapper. |
| 1085 | this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL); |
| 1086 | } |
| 1087 | |
| 1088 | // -M is equivalent to "-Map -". |
| 1089 | if (this->print_map() && !this->user_set_Map()) |
| 1090 | { |
| 1091 | this->set_Map("-"); |
| 1092 | this->set_user_set_Map(); |
| 1093 | } |
| 1094 | |
| 1095 | // Using -n or -N implies -static. |
| 1096 | if (this->nmagic() || this->omagic()) |
| 1097 | this->set_static(true); |
| 1098 | |
| 1099 | // If --thread_count is specified, it applies to |
| 1100 | // --thread-count-{initial,middle,final}, though it doesn't override |
| 1101 | // them. |
| 1102 | if (this->thread_count() > 0 && this->thread_count_initial() == 0) |
| 1103 | this->set_thread_count_initial(this->thread_count()); |
| 1104 | if (this->thread_count() > 0 && this->thread_count_middle() == 0) |
| 1105 | this->set_thread_count_middle(this->thread_count()); |
| 1106 | if (this->thread_count() > 0 && this->thread_count_final() == 0) |
| 1107 | this->set_thread_count_final(this->thread_count()); |
| 1108 | |
| 1109 | // Let's warn if you set the thread-count but we're going to ignore it. |
| 1110 | #ifndef ENABLE_THREADS |
| 1111 | if (this->threads()) |
| 1112 | { |
| 1113 | gold_warning(_("ignoring --threads: " |
| 1114 | "%s was compiled without thread support"), |
| 1115 | program_name); |
| 1116 | this->set_threads(false); |
| 1117 | } |
| 1118 | if (this->thread_count() > 0 || this->thread_count_initial() > 0 |
| 1119 | || this->thread_count_middle() > 0 || this->thread_count_final() > 0) |
| 1120 | gold_warning(_("ignoring --thread-count: " |
| 1121 | "%s was compiled without thread support"), |
| 1122 | program_name); |
| 1123 | #endif |
| 1124 | |
| 1125 | std::string libpath; |
| 1126 | if (this->user_set_Y()) |
| 1127 | { |
| 1128 | libpath = this->Y(); |
| 1129 | if (libpath.compare(0, 2, "P,") == 0) |
| 1130 | libpath.erase(0, 2); |
| 1131 | } |
| 1132 | else if (!this->nostdlib()) |
| 1133 | { |
| 1134 | #ifndef NATIVE_LINKER |
| 1135 | #define NATIVE_LINKER 0 |
| 1136 | #endif |
| 1137 | const char* p = LIB_PATH; |
| 1138 | if (strcmp(p, "::DEFAULT::") != 0) |
| 1139 | libpath = p; |
| 1140 | else if (NATIVE_LINKER |
| 1141 | || this->user_set_sysroot() |
| 1142 | || *TARGET_SYSTEM_ROOT != '\0') |
| 1143 | { |
| 1144 | this->add_to_library_path_with_sysroot("/lib"); |
| 1145 | this->add_to_library_path_with_sysroot("/usr/lib"); |
| 1146 | } |
| 1147 | else |
| 1148 | this->add_to_library_path_with_sysroot(TOOLLIBDIR); |
| 1149 | } |
| 1150 | |
| 1151 | if (!libpath.empty()) |
| 1152 | { |
| 1153 | size_t pos = 0; |
| 1154 | size_t next_pos; |
| 1155 | do |
| 1156 | { |
| 1157 | next_pos = libpath.find(':', pos); |
| 1158 | size_t len = (next_pos == std::string::npos |
| 1159 | ? next_pos |
| 1160 | : next_pos - pos); |
| 1161 | if (len != 0) |
| 1162 | this->add_to_library_path_with_sysroot(libpath.substr(pos, len)); |
| 1163 | pos = next_pos + 1; |
| 1164 | } |
| 1165 | while (next_pos != std::string::npos); |
| 1166 | } |
| 1167 | |
| 1168 | // Parse the contents of -retain-symbols-file into a set. |
| 1169 | if (this->retain_symbols_file()) |
| 1170 | { |
| 1171 | std::ifstream in; |
| 1172 | in.open(this->retain_symbols_file()); |
| 1173 | if (!in) |
| 1174 | gold_fatal(_("unable to open -retain-symbols-file file %s: %s"), |
| 1175 | this->retain_symbols_file(), strerror(errno)); |
| 1176 | std::string line; |
| 1177 | std::getline(in, line); // this chops off the trailing \n, if any |
| 1178 | while (in) |
| 1179 | { |
| 1180 | if (!line.empty() && line[line.length() - 1] == '\r') // Windows |
| 1181 | line.resize(line.length() - 1); |
| 1182 | this->symbols_to_retain_.insert(line); |
| 1183 | std::getline(in, line); |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | // -Bgroup implies --unresolved-symbols=report-all. |
| 1188 | if (this->Bgroup() && !this->user_set_unresolved_symbols()) |
| 1189 | this->set_unresolved_symbols("report-all"); |
| 1190 | |
| 1191 | // -shared implies --allow-shlib-undefined. Currently |
| 1192 | // ---allow-shlib-undefined controls warnings issued based on the |
| 1193 | // -symbol table. --unresolved-symbols controls warnings issued |
| 1194 | // -based on relocations. |
| 1195 | if (this->shared() && !this->user_set_allow_shlib_undefined()) |
| 1196 | this->set_allow_shlib_undefined(true); |
| 1197 | |
| 1198 | // Normalize library_path() by adding the sysroot to all directories |
| 1199 | // in the path, as appropriate. |
| 1200 | this->add_sysroot(); |
| 1201 | |
| 1202 | // Now that we've normalized the options, check for contradictory ones. |
| 1203 | if (this->shared() && this->is_static()) |
| 1204 | gold_fatal(_("-shared and -static are incompatible")); |
| 1205 | if (this->shared() && this->pie()) |
| 1206 | gold_fatal(_("-shared and -pie are incompatible")); |
| 1207 | if (this->pie() && this->is_static()) |
| 1208 | gold_fatal(_("-pie and -static are incompatible")); |
| 1209 | |
| 1210 | if (this->shared() && this->relocatable()) |
| 1211 | gold_fatal(_("-shared and -r are incompatible")); |
| 1212 | if (this->pie() && this->relocatable()) |
| 1213 | gold_fatal(_("-pie and -r are incompatible")); |
| 1214 | |
| 1215 | if (!this->shared()) |
| 1216 | { |
| 1217 | if (this->filter() != NULL) |
| 1218 | gold_fatal(_("-F/--filter may not used without -shared")); |
| 1219 | if (this->any_auxiliary()) |
| 1220 | gold_fatal(_("-f/--auxiliary may not be used without -shared")); |
| 1221 | } |
| 1222 | |
| 1223 | // TODO: implement support for -retain-symbols-file with -r, if needed. |
| 1224 | if (this->relocatable() && this->retain_symbols_file()) |
| 1225 | gold_fatal(_("-retain-symbols-file does not yet work with -r")); |
| 1226 | |
| 1227 | if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF |
| 1228 | && (this->shared() |
| 1229 | || this->pie() |
| 1230 | || this->relocatable())) |
| 1231 | gold_fatal(_("binary output format not compatible " |
| 1232 | "with -shared or -pie or -r")); |
| 1233 | |
| 1234 | if (this->user_set_hash_bucket_empty_fraction() |
| 1235 | && (this->hash_bucket_empty_fraction() < 0.0 |
| 1236 | || this->hash_bucket_empty_fraction() >= 1.0)) |
| 1237 | gold_fatal(_("--hash-bucket-empty-fraction value %g out of range " |
| 1238 | "[0.0, 1.0)"), |
| 1239 | this->hash_bucket_empty_fraction()); |
| 1240 | |
| 1241 | if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF) |
| 1242 | gold_fatal(_("Options --incremental-changed, --incremental-unchanged, " |
| 1243 | "--incremental-unknown require the use of --incremental")); |
| 1244 | |
| 1245 | // Check for options that are not compatible with incremental linking. |
| 1246 | // Where an option can be disabled without seriously changing the semantics |
| 1247 | // of the link, we turn the option off; otherwise, we issue a fatal error. |
| 1248 | |
| 1249 | if (this->incremental_mode_ != INCREMENTAL_OFF) |
| 1250 | { |
| 1251 | if (this->relocatable()) |
| 1252 | gold_fatal(_("incremental linking is not compatible with -r")); |
| 1253 | if (this->emit_relocs()) |
| 1254 | gold_fatal(_("incremental linking is not compatible with " |
| 1255 | "--emit-relocs")); |
| 1256 | if (this->has_plugins()) |
| 1257 | gold_fatal(_("incremental linking is not compatible with --plugin")); |
| 1258 | if (this->gc_sections()) |
| 1259 | { |
| 1260 | gold_warning(_("ignoring --gc-sections for an incremental link")); |
| 1261 | this->set_gc_sections(false); |
| 1262 | } |
| 1263 | if (this->icf_enabled()) |
| 1264 | { |
| 1265 | gold_warning(_("ignoring --icf for an incremental link")); |
| 1266 | this->set_icf_status(ICF_NONE); |
| 1267 | } |
| 1268 | if (strcmp(this->compress_debug_sections(), "none") != 0) |
| 1269 | { |
| 1270 | gold_warning(_("ignoring --compress-debug-sections for an " |
| 1271 | "incremental link")); |
| 1272 | this->set_compress_debug_sections("none"); |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | // --rosegment-gap implies --rosegment. |
| 1277 | if (this->user_set_rosegment_gap()) |
| 1278 | this->set_rosegment(true); |
| 1279 | |
| 1280 | // FIXME: we can/should be doing a lot more sanity checking here. |
| 1281 | } |
| 1282 | |
| 1283 | // Search_directory methods. |
| 1284 | |
| 1285 | // This is called if we have a sysroot. Apply the sysroot if |
| 1286 | // appropriate. Record whether the directory is in the sysroot. |
| 1287 | |
| 1288 | void |
| 1289 | Search_directory::add_sysroot(const char* sysroot, |
| 1290 | const char* canonical_sysroot) |
| 1291 | { |
| 1292 | gold_assert(*sysroot != '\0'); |
| 1293 | if (this->put_in_sysroot_) |
| 1294 | { |
| 1295 | if (!IS_DIR_SEPARATOR(this->name_[0]) |
| 1296 | && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1])) |
| 1297 | this->name_ = '/' + this->name_; |
| 1298 | this->name_ = sysroot + this->name_; |
| 1299 | this->is_in_sysroot_ = true; |
| 1300 | } |
| 1301 | else |
| 1302 | { |
| 1303 | // Check whether this entry is in the sysroot. To do this |
| 1304 | // correctly, we need to use canonical names. Otherwise we will |
| 1305 | // get confused by the ../../.. paths that gcc tends to use. |
| 1306 | char* canonical_name = lrealpath(this->name_.c_str()); |
| 1307 | int canonical_name_len = strlen(canonical_name); |
| 1308 | int canonical_sysroot_len = strlen(canonical_sysroot); |
| 1309 | if (canonical_name_len > canonical_sysroot_len |
| 1310 | && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len])) |
| 1311 | { |
| 1312 | canonical_name[canonical_sysroot_len] = '\0'; |
| 1313 | if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0) |
| 1314 | this->is_in_sysroot_ = true; |
| 1315 | } |
| 1316 | free(canonical_name); |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | // Input_arguments methods. |
| 1321 | |
| 1322 | // Add a file to the list. |
| 1323 | |
| 1324 | Input_argument& |
| 1325 | Input_arguments::add_file(Input_file_argument& file) |
| 1326 | { |
| 1327 | file.set_arg_serial(++this->file_count_); |
| 1328 | if (this->in_group_) |
| 1329 | { |
| 1330 | gold_assert(!this->input_argument_list_.empty()); |
| 1331 | gold_assert(this->input_argument_list_.back().is_group()); |
| 1332 | return this->input_argument_list_.back().group()->add_file(file); |
| 1333 | } |
| 1334 | if (this->in_lib_) |
| 1335 | { |
| 1336 | gold_assert(!this->input_argument_list_.empty()); |
| 1337 | gold_assert(this->input_argument_list_.back().is_lib()); |
| 1338 | return this->input_argument_list_.back().lib()->add_file(file); |
| 1339 | } |
| 1340 | this->input_argument_list_.push_back(Input_argument(file)); |
| 1341 | return this->input_argument_list_.back(); |
| 1342 | } |
| 1343 | |
| 1344 | // Start a group. |
| 1345 | |
| 1346 | void |
| 1347 | Input_arguments::start_group() |
| 1348 | { |
| 1349 | if (this->in_group_) |
| 1350 | gold_fatal(_("May not nest groups")); |
| 1351 | if (this->in_lib_) |
| 1352 | gold_fatal(_("may not nest groups in libraries")); |
| 1353 | Input_file_group* group = new Input_file_group(); |
| 1354 | this->input_argument_list_.push_back(Input_argument(group)); |
| 1355 | this->in_group_ = true; |
| 1356 | } |
| 1357 | |
| 1358 | // End a group. |
| 1359 | |
| 1360 | void |
| 1361 | Input_arguments::end_group() |
| 1362 | { |
| 1363 | if (!this->in_group_) |
| 1364 | gold_fatal(_("Group end without group start")); |
| 1365 | this->in_group_ = false; |
| 1366 | } |
| 1367 | |
| 1368 | // Start a lib. |
| 1369 | |
| 1370 | void |
| 1371 | Input_arguments::start_lib(const Position_dependent_options& options) |
| 1372 | { |
| 1373 | if (this->in_lib_) |
| 1374 | gold_fatal(_("may not nest libraries")); |
| 1375 | if (this->in_group_) |
| 1376 | gold_fatal(_("may not nest libraries in groups")); |
| 1377 | Input_file_lib* lib = new Input_file_lib(options); |
| 1378 | this->input_argument_list_.push_back(Input_argument(lib)); |
| 1379 | this->in_lib_ = true; |
| 1380 | } |
| 1381 | |
| 1382 | // End a lib. |
| 1383 | |
| 1384 | void |
| 1385 | Input_arguments::end_lib() |
| 1386 | { |
| 1387 | if (!this->in_lib_) |
| 1388 | gold_fatal(_("lib end without lib start")); |
| 1389 | this->in_lib_ = false; |
| 1390 | } |
| 1391 | |
| 1392 | // Command_line options. |
| 1393 | |
| 1394 | Command_line::Command_line() |
| 1395 | { |
| 1396 | } |
| 1397 | |
| 1398 | // Pre_options is the hook that sets the ready_to_register flag. |
| 1399 | |
| 1400 | Command_line::Pre_options::Pre_options() |
| 1401 | { |
| 1402 | gold::options::ready_to_register = true; |
| 1403 | } |
| 1404 | |
| 1405 | // Process the command line options. For process_one_option, i is the |
| 1406 | // index of argv to process next, and must be an option (that is, |
| 1407 | // start with a dash). The return value is the index of the next |
| 1408 | // option to process (i+1 or i+2, or argc to indicate processing is |
| 1409 | // done). no_more_options is set to true if (and when) "--" is seen |
| 1410 | // as an option. |
| 1411 | |
| 1412 | int |
| 1413 | Command_line::process_one_option(int argc, const char** argv, int i, |
| 1414 | bool* no_more_options) |
| 1415 | { |
| 1416 | gold_assert(argv[i][0] == '-' && !(*no_more_options)); |
| 1417 | |
| 1418 | // If we are reading "--", then just set no_more_options and return. |
| 1419 | if (argv[i][1] == '-' && argv[i][2] == '\0') |
| 1420 | { |
| 1421 | *no_more_options = true; |
| 1422 | return i + 1; |
| 1423 | } |
| 1424 | |
| 1425 | int new_i = i; |
| 1426 | options::One_option* option = NULL; |
| 1427 | const char* arg = NULL; |
| 1428 | |
| 1429 | // First, try to process argv as a long option. |
| 1430 | option = parse_long_option(argc, argv, false, &arg, &new_i); |
| 1431 | if (option) |
| 1432 | { |
| 1433 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); |
| 1434 | return new_i; |
| 1435 | } |
| 1436 | |
| 1437 | // Now, try to process argv as a short option. Since several short |
| 1438 | // options can be combined in one argv, we may have to parse a lot |
| 1439 | // until we're done reading this argv. |
| 1440 | int pos_in_argv_i = 1; |
| 1441 | while (new_i == i) |
| 1442 | { |
| 1443 | option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i); |
| 1444 | if (!option) |
| 1445 | break; |
| 1446 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); |
| 1447 | ++pos_in_argv_i; |
| 1448 | } |
| 1449 | if (option) |
| 1450 | return new_i; |
| 1451 | |
| 1452 | // I guess it's neither a long option nor a short option. |
| 1453 | usage(_("unknown option"), argv[i]); |
| 1454 | return argc; |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | void |
| 1459 | Command_line::process(int argc, const char** argv) |
| 1460 | { |
| 1461 | bool no_more_options = false; |
| 1462 | int i = 0; |
| 1463 | while (i < argc) |
| 1464 | { |
| 1465 | this->position_options_.copy_from_options(this->options()); |
| 1466 | if (no_more_options || argv[i][0] != '-') |
| 1467 | { |
| 1468 | Input_file_argument file(argv[i], |
| 1469 | Input_file_argument::INPUT_FILE_TYPE_FILE, |
| 1470 | "", false, this->position_options_); |
| 1471 | this->inputs_.add_file(file); |
| 1472 | ++i; |
| 1473 | } |
| 1474 | else |
| 1475 | i = process_one_option(argc, argv, i, &no_more_options); |
| 1476 | } |
| 1477 | |
| 1478 | if (this->inputs_.in_group()) |
| 1479 | { |
| 1480 | fprintf(stderr, _("%s: missing group end\n"), program_name); |
| 1481 | usage(); |
| 1482 | } |
| 1483 | |
| 1484 | // Normalize the options and ensure they don't contradict each other. |
| 1485 | this->options_.finalize(); |
| 1486 | } |
| 1487 | |
| 1488 | // Finalize the version script options and return them. |
| 1489 | |
| 1490 | const Version_script_info& |
| 1491 | Command_line::version_script() |
| 1492 | { |
| 1493 | this->options_.finalize_dynamic_list(); |
| 1494 | Version_script_info* vsi = this->script_options_.version_script_info(); |
| 1495 | vsi->finalize(); |
| 1496 | return *vsi; |
| 1497 | } |
| 1498 | |
| 1499 | } // End namespace gold. |