| 1 | // options.c -- handle command line options for gold |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <cstdlib> |
| 26 | #include <cstring> |
| 27 | #include <vector> |
| 28 | #include <iostream> |
| 29 | #include <sys/stat.h> |
| 30 | #include "filenames.h" |
| 31 | #include "libiberty.h" |
| 32 | #include "demangle.h" |
| 33 | #include "../bfd/bfdver.h" |
| 34 | |
| 35 | #include "debug.h" |
| 36 | #include "script.h" |
| 37 | #include "target-select.h" |
| 38 | #include "options.h" |
| 39 | |
| 40 | namespace gold |
| 41 | { |
| 42 | |
| 43 | General_options |
| 44 | Position_dependent_options::default_options_; |
| 45 | |
| 46 | namespace options |
| 47 | { |
| 48 | |
| 49 | // This global variable is set up as General_options is constructed. |
| 50 | static std::vector<const One_option*> registered_options; |
| 51 | |
| 52 | // These are set up at the same time -- the variables that accept one |
| 53 | // dash, two, or require -z. A single variable may be in more than |
| 54 | // one of thes data structures. |
| 55 | typedef Unordered_map<std::string, One_option*> Option_map; |
| 56 | static Option_map* long_options = NULL; |
| 57 | static One_option* short_options[128]; |
| 58 | |
| 59 | void |
| 60 | One_option::register_option() |
| 61 | { |
| 62 | registered_options.push_back(this); |
| 63 | |
| 64 | // We can't make long_options a static Option_map because we can't |
| 65 | // guarantee that will be initialized before register_option() is |
| 66 | // first called. |
| 67 | if (long_options == NULL) |
| 68 | long_options = new Option_map; |
| 69 | |
| 70 | // TWO_DASHES means that two dashes are preferred, but one is ok too. |
| 71 | if (!this->longname.empty()) |
| 72 | (*long_options)[this->longname] = this; |
| 73 | |
| 74 | const int shortname_as_int = static_cast<int>(this->shortname); |
| 75 | gold_assert(shortname_as_int >= 0 && shortname_as_int < 128); |
| 76 | if (this->shortname != '\0') |
| 77 | short_options[shortname_as_int] = this; |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | One_option::print() const |
| 82 | { |
| 83 | bool comma = false; |
| 84 | printf(" "); |
| 85 | int len = 2; |
| 86 | if (this->shortname != '\0') |
| 87 | { |
| 88 | len += printf("-%c", this->shortname); |
| 89 | if (this->helparg) |
| 90 | { |
| 91 | // -z takes long-names only. |
| 92 | gold_assert(this->dashes != DASH_Z); |
| 93 | len += printf(" %s", gettext(this->helparg)); |
| 94 | } |
| 95 | comma = true; |
| 96 | } |
| 97 | if (!this->longname.empty() |
| 98 | && !(this->longname[0] == this->shortname |
| 99 | && this->longname[1] == '\0')) |
| 100 | { |
| 101 | if (comma) |
| 102 | len += printf(", "); |
| 103 | switch (this->dashes) |
| 104 | { |
| 105 | case options::ONE_DASH: case options::EXACTLY_ONE_DASH: |
| 106 | len += printf("-"); |
| 107 | break; |
| 108 | case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES: |
| 109 | len += printf("--"); |
| 110 | break; |
| 111 | case options::DASH_Z: |
| 112 | len += printf("-z "); |
| 113 | break; |
| 114 | default: |
| 115 | gold_unreachable(); |
| 116 | } |
| 117 | len += printf("%s", this->longname.c_str()); |
| 118 | if (this->helparg) |
| 119 | { |
| 120 | // For most options, we print "--frob FOO". But for -z |
| 121 | // we print "-z frob=FOO". |
| 122 | len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ', |
| 123 | gettext(this->helparg)); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | if (len >= 30) |
| 128 | { |
| 129 | printf("\n"); |
| 130 | len = 0; |
| 131 | } |
| 132 | for (; len < 30; ++len) |
| 133 | std::putchar(' '); |
| 134 | |
| 135 | // TODO: if we're boolean, add " (default)" when appropriate. |
| 136 | printf("%s\n", gettext(this->helpstring)); |
| 137 | } |
| 138 | |
| 139 | void |
| 140 | help() |
| 141 | { |
| 142 | printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name); |
| 143 | |
| 144 | std::vector<const One_option*>::const_iterator it; |
| 145 | for (it = registered_options.begin(); it != registered_options.end(); ++it) |
| 146 | (*it)->print(); |
| 147 | |
| 148 | // config.guess and libtool.m4 look in ld --help output for the |
| 149 | // string "supported targets". |
| 150 | printf(_("%s: supported targets:"), gold::program_name); |
| 151 | std::vector<const char*> supported_names; |
| 152 | gold::supported_target_names(&supported_names); |
| 153 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 154 | p != supported_names.end(); |
| 155 | ++p) |
| 156 | printf(" %s", *p); |
| 157 | printf("\n"); |
| 158 | |
| 159 | // REPORT_BUGS_TO is defined in bfd/bfdver.h. |
| 160 | const char* report = REPORT_BUGS_TO; |
| 161 | if (*report != '\0') |
| 162 | printf(_("Report bugs to %s\n"), report); |
| 163 | } |
| 164 | |
| 165 | // For bool, arg will be NULL (boolean options take no argument); |
| 166 | // we always just set to true. |
| 167 | void |
| 168 | parse_bool(const char*, const char*, bool* retval) |
| 169 | { |
| 170 | *retval = true; |
| 171 | } |
| 172 | |
| 173 | void |
| 174 | parse_uint(const char* option_name, const char* arg, int* retval) |
| 175 | { |
| 176 | char* endptr; |
| 177 | *retval = strtol(arg, &endptr, 0); |
| 178 | if (*endptr != '\0' || retval < 0) |
| 179 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), |
| 180 | option_name, arg); |
| 181 | } |
| 182 | |
| 183 | void |
| 184 | parse_uint64(const char* option_name, const char* arg, uint64_t *retval) |
| 185 | { |
| 186 | char* endptr; |
| 187 | *retval = strtoull(arg, &endptr, 0); |
| 188 | if (*endptr != '\0') |
| 189 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), |
| 190 | option_name, arg); |
| 191 | } |
| 192 | |
| 193 | void |
| 194 | parse_double(const char* option_name, const char* arg, double* retval) |
| 195 | { |
| 196 | char* endptr; |
| 197 | *retval = strtod(arg, &endptr); |
| 198 | if (*endptr != '\0') |
| 199 | gold_fatal(_("%s: invalid option value " |
| 200 | "(expected a floating point number): %s"), |
| 201 | option_name, arg); |
| 202 | } |
| 203 | |
| 204 | void |
| 205 | parse_string(const char* option_name, const char* arg, const char** retval) |
| 206 | { |
| 207 | if (*arg == '\0') |
| 208 | gold_fatal(_("%s: must take a non-empty argument"), option_name); |
| 209 | *retval = arg; |
| 210 | } |
| 211 | |
| 212 | void |
| 213 | parse_optional_string(const char*, const char* arg, const char** retval) |
| 214 | { |
| 215 | *retval = arg; |
| 216 | } |
| 217 | |
| 218 | void |
| 219 | parse_dirlist(const char*, const char* arg, Dir_list* retval) |
| 220 | { |
| 221 | retval->push_back(Search_directory(arg, false)); |
| 222 | } |
| 223 | |
| 224 | void |
| 225 | parse_set(const char*, const char* arg, String_set* retval) |
| 226 | { |
| 227 | retval->insert(std::string(arg)); |
| 228 | } |
| 229 | |
| 230 | void |
| 231 | parse_choices(const char* option_name, const char* arg, const char** retval, |
| 232 | const char* choices[], int num_choices) |
| 233 | { |
| 234 | for (int i = 0; i < num_choices; i++) |
| 235 | if (strcmp(choices[i], arg) == 0) |
| 236 | { |
| 237 | *retval = arg; |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | // If we get here, the user did not enter a valid choice, so we die. |
| 242 | std::string choices_list; |
| 243 | for (int i = 0; i < num_choices; i++) |
| 244 | { |
| 245 | choices_list += choices[i]; |
| 246 | if (i != num_choices - 1) |
| 247 | choices_list += ", "; |
| 248 | } |
| 249 | gold_fatal(_("%s: must take one of the following arguments: %s"), |
| 250 | option_name, choices_list.c_str()); |
| 251 | } |
| 252 | |
| 253 | } // End namespace options. |
| 254 | |
| 255 | // Define the handler for "special" options (set via DEFINE_special). |
| 256 | |
| 257 | void |
| 258 | General_options::parse_help(const char*, const char*, Command_line*) |
| 259 | { |
| 260 | options::help(); |
| 261 | ::exit(EXIT_SUCCESS); |
| 262 | } |
| 263 | |
| 264 | void |
| 265 | General_options::parse_version(const char* opt, const char*, Command_line*) |
| 266 | { |
| 267 | gold::print_version(opt[0] == '-' && opt[1] == 'v'); |
| 268 | ::exit(EXIT_SUCCESS); |
| 269 | } |
| 270 | |
| 271 | void |
| 272 | General_options::parse_V(const char*, const char*, Command_line*) |
| 273 | { |
| 274 | gold::print_version(true); |
| 275 | printf(_(" Supported targets:\n")); |
| 276 | std::vector<const char*> supported_names; |
| 277 | gold::supported_target_names(&supported_names); |
| 278 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); |
| 279 | p != supported_names.end(); |
| 280 | ++p) |
| 281 | printf(" %s\n", *p); |
| 282 | } |
| 283 | |
| 284 | void |
| 285 | General_options::parse_defsym(const char*, const char* arg, |
| 286 | Command_line* cmdline) |
| 287 | { |
| 288 | cmdline->script_options().define_symbol(arg); |
| 289 | } |
| 290 | |
| 291 | void |
| 292 | General_options::parse_library(const char*, const char* arg, |
| 293 | Command_line* cmdline) |
| 294 | { |
| 295 | Input_file_argument file(arg, true, "", false, *this); |
| 296 | cmdline->inputs().add_file(file); |
| 297 | } |
| 298 | |
| 299 | void |
| 300 | General_options::parse_R(const char* option, const char* arg, |
| 301 | Command_line* cmdline) |
| 302 | { |
| 303 | struct stat s; |
| 304 | if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode)) |
| 305 | this->add_to_rpath(arg); |
| 306 | else |
| 307 | this->parse_just_symbols(option, arg, cmdline); |
| 308 | } |
| 309 | |
| 310 | void |
| 311 | General_options::parse_just_symbols(const char*, const char* arg, |
| 312 | Command_line* cmdline) |
| 313 | { |
| 314 | Input_file_argument file(arg, false, "", true, *this); |
| 315 | cmdline->inputs().add_file(file); |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | General_options::parse_static(const char*, const char*, Command_line*) |
| 320 | { |
| 321 | this->set_static(true); |
| 322 | } |
| 323 | |
| 324 | void |
| 325 | General_options::parse_script(const char*, const char* arg, |
| 326 | Command_line* cmdline) |
| 327 | { |
| 328 | if (!read_commandline_script(arg, cmdline)) |
| 329 | gold::gold_fatal(_("unable to parse script file %s"), arg); |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | General_options::parse_version_script(const char*, const char* arg, |
| 334 | Command_line* cmdline) |
| 335 | { |
| 336 | if (!read_version_script(arg, cmdline)) |
| 337 | gold::gold_fatal(_("unable to parse version script file %s"), arg); |
| 338 | } |
| 339 | |
| 340 | void |
| 341 | General_options::parse_start_group(const char*, const char*, |
| 342 | Command_line* cmdline) |
| 343 | { |
| 344 | cmdline->inputs().start_group(); |
| 345 | } |
| 346 | |
| 347 | void |
| 348 | General_options::parse_end_group(const char*, const char*, |
| 349 | Command_line* cmdline) |
| 350 | { |
| 351 | cmdline->inputs().end_group(); |
| 352 | } |
| 353 | |
| 354 | } // End namespace gold. |
| 355 | |
| 356 | namespace |
| 357 | { |
| 358 | |
| 359 | void |
| 360 | usage() |
| 361 | { |
| 362 | fprintf(stderr, |
| 363 | _("%s: use the --help option for usage information\n"), |
| 364 | gold::program_name); |
| 365 | ::exit(EXIT_FAILURE); |
| 366 | } |
| 367 | |
| 368 | void |
| 369 | usage(const char* msg, const char *opt) |
| 370 | { |
| 371 | fprintf(stderr, |
| 372 | _("%s: %s: %s\n"), |
| 373 | gold::program_name, opt, msg); |
| 374 | usage(); |
| 375 | } |
| 376 | |
| 377 | // Recognize input and output target names. The GNU linker accepts |
| 378 | // these with --format and --oformat. This code is intended to be |
| 379 | // minimally compatible. In practice for an ELF target this would be |
| 380 | // the same target as the input files; that name always start with |
| 381 | // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex", |
| 382 | // "binary", "ihex". |
| 383 | |
| 384 | gold::General_options::Object_format |
| 385 | string_to_object_format(const char* arg) |
| 386 | { |
| 387 | if (strncmp(arg, "elf", 3) == 0) |
| 388 | return gold::General_options::OBJECT_FORMAT_ELF; |
| 389 | else if (strcmp(arg, "binary") == 0) |
| 390 | return gold::General_options::OBJECT_FORMAT_BINARY; |
| 391 | else |
| 392 | { |
| 393 | gold::gold_error(_("format '%s' not supported; treating as elf " |
| 394 | "(supported formats: elf, binary)"), |
| 395 | arg); |
| 396 | return gold::General_options::OBJECT_FORMAT_ELF; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | // If the default sysroot is relocatable, try relocating it based on |
| 401 | // the prefix FROM. |
| 402 | |
| 403 | char* |
| 404 | get_relative_sysroot(const char* from) |
| 405 | { |
| 406 | char* path = make_relative_prefix(gold::program_name, from, |
| 407 | TARGET_SYSTEM_ROOT); |
| 408 | if (path != NULL) |
| 409 | { |
| 410 | struct stat s; |
| 411 | if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode)) |
| 412 | return path; |
| 413 | free(path); |
| 414 | } |
| 415 | |
| 416 | return NULL; |
| 417 | } |
| 418 | |
| 419 | // Return the default sysroot. This is set by the --with-sysroot |
| 420 | // option to configure. Note we do not free the return value of |
| 421 | // get_relative_sysroot, which is a small memory leak, but is |
| 422 | // necessary since we store this pointer directly in General_options. |
| 423 | |
| 424 | const char* |
| 425 | get_default_sysroot() |
| 426 | { |
| 427 | const char* sysroot = TARGET_SYSTEM_ROOT; |
| 428 | if (*sysroot == '\0') |
| 429 | return NULL; |
| 430 | |
| 431 | if (TARGET_SYSTEM_ROOT_RELOCATABLE) |
| 432 | { |
| 433 | char* path = get_relative_sysroot(BINDIR); |
| 434 | if (path == NULL) |
| 435 | path = get_relative_sysroot(TOOLBINDIR); |
| 436 | if (path != NULL) |
| 437 | return path; |
| 438 | } |
| 439 | |
| 440 | return sysroot; |
| 441 | } |
| 442 | |
| 443 | // Parse a long option. Such options have the form |
| 444 | // <-|--><option>[=arg]. If "=arg" is not present but the option |
| 445 | // takes an argument, the next word is taken to the be the argument. |
| 446 | // If equals_only is set, then only the <option>=<arg> form is |
| 447 | // accepted, not the <option><space><arg> form. Returns a One_option |
| 448 | // struct or NULL if argv[i] cannot be parsed as a long option. In |
| 449 | // the not-NULL case, *arg is set to the option's argument (NULL if |
| 450 | // the option takes no argument), and *i is advanced past this option. |
| 451 | // NOTE: it is safe for argv and arg to point to the same place. |
| 452 | gold::options::One_option* |
| 453 | parse_long_option(int argc, const char** argv, bool equals_only, |
| 454 | const char** arg, int* i) |
| 455 | { |
| 456 | const char* const this_argv = argv[*i]; |
| 457 | |
| 458 | const char* equals = strchr(this_argv, '='); |
| 459 | const char* option_start = this_argv + strspn(this_argv, "-"); |
| 460 | std::string option(option_start, |
| 461 | equals ? equals - option_start : strlen(option_start)); |
| 462 | |
| 463 | gold::options::Option_map::iterator it |
| 464 | = gold::options::long_options->find(option); |
| 465 | if (it == gold::options::long_options->end()) |
| 466 | return NULL; |
| 467 | |
| 468 | gold::options::One_option* retval = it->second; |
| 469 | |
| 470 | // If the dash-count doesn't match, we fail. |
| 471 | if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>" |
| 472 | { |
| 473 | if (retval->dashes != gold::options::DASH_Z) |
| 474 | return NULL; |
| 475 | } |
| 476 | else if (this_argv[1] != '-') // one dash |
| 477 | { |
| 478 | if (retval->dashes != gold::options::ONE_DASH |
| 479 | && retval->dashes != gold::options::EXACTLY_ONE_DASH |
| 480 | && retval->dashes != gold::options::TWO_DASHES) |
| 481 | return NULL; |
| 482 | } |
| 483 | else // two dashes (or more!) |
| 484 | { |
| 485 | if (retval->dashes != gold::options::TWO_DASHES |
| 486 | && retval->dashes != gold::options::EXACTLY_TWO_DASHES |
| 487 | && retval->dashes != gold::options::ONE_DASH) |
| 488 | return NULL; |
| 489 | } |
| 490 | |
| 491 | // Now that we know the option is good (or else bad in a way that |
| 492 | // will cause us to die), increment i to point past this argv. |
| 493 | ++(*i); |
| 494 | |
| 495 | // Figure out the option's argument, if any. |
| 496 | if (!retval->takes_argument()) |
| 497 | { |
| 498 | if (equals) |
| 499 | usage(_("unexpected argument"), this_argv); |
| 500 | else |
| 501 | *arg = NULL; |
| 502 | } |
| 503 | else |
| 504 | { |
| 505 | if (equals) |
| 506 | *arg = equals + 1; |
| 507 | else if (retval->takes_optional_argument()) |
| 508 | *arg = retval->default_value; |
| 509 | else if (*i < argc && !equals_only) |
| 510 | *arg = argv[(*i)++]; |
| 511 | else |
| 512 | usage(_("missing argument"), this_argv); |
| 513 | } |
| 514 | |
| 515 | return retval; |
| 516 | } |
| 517 | |
| 518 | // Parse a short option. Such options have the form -<option>[arg]. |
| 519 | // If "arg" is not present but the option takes an argument, the next |
| 520 | // word is taken to the be the argument. If the option does not take |
| 521 | // an argument, it may be followed by another short option. Returns a |
| 522 | // One_option struct or NULL if argv[i] cannot be parsed as a short |
| 523 | // option. In the not-NULL case, *arg is set to the option's argument |
| 524 | // (NULL if the option takes no argument), and *i is advanced past |
| 525 | // this option. This function keeps *i the same if we parsed a short |
| 526 | // option that does not take an argument, that looks to be followed by |
| 527 | // another short option in the same word. |
| 528 | gold::options::One_option* |
| 529 | parse_short_option(int argc, const char** argv, int pos_in_argv_i, |
| 530 | const char** arg, int* i) |
| 531 | { |
| 532 | const char* const this_argv = argv[*i]; |
| 533 | |
| 534 | if (this_argv[0] != '-') |
| 535 | return NULL; |
| 536 | |
| 537 | // We handle -z as a special case. |
| 538 | static gold::options::One_option dash_z("", gold::options::DASH_Z, |
| 539 | 'z', "", "-z", "Z-OPTION", false, |
| 540 | NULL); |
| 541 | gold::options::One_option* retval = NULL; |
| 542 | if (this_argv[pos_in_argv_i] == 'z') |
| 543 | retval = &dash_z; |
| 544 | else |
| 545 | { |
| 546 | const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]); |
| 547 | if (char_as_int > 0 && char_as_int < 128) |
| 548 | retval = gold::options::short_options[char_as_int]; |
| 549 | } |
| 550 | |
| 551 | if (retval == NULL) |
| 552 | return NULL; |
| 553 | |
| 554 | // Figure out the option's argument, if any. |
| 555 | if (!retval->takes_argument()) |
| 556 | { |
| 557 | *arg = NULL; |
| 558 | // We only advance past this argument if it's the only one in argv. |
| 559 | if (this_argv[pos_in_argv_i + 1] == '\0') |
| 560 | ++(*i); |
| 561 | } |
| 562 | else |
| 563 | { |
| 564 | // If we take an argument, we'll eat up this entire argv entry. |
| 565 | ++(*i); |
| 566 | if (this_argv[pos_in_argv_i + 1] != '\0') |
| 567 | *arg = this_argv + pos_in_argv_i + 1; |
| 568 | else if (retval->takes_optional_argument()) |
| 569 | *arg = retval->default_value; |
| 570 | else if (*i < argc) |
| 571 | *arg = argv[(*i)++]; |
| 572 | else |
| 573 | usage(_("missing argument"), this_argv); |
| 574 | } |
| 575 | |
| 576 | // If we're a -z option, we need to parse our argument as a |
| 577 | // long-option, e.g. "-z stacksize=8192". |
| 578 | if (retval == &dash_z) |
| 579 | { |
| 580 | int dummy_i = 0; |
| 581 | const char* dash_z_arg = *arg; |
| 582 | retval = parse_long_option(1, arg, true, arg, &dummy_i); |
| 583 | if (retval == NULL) |
| 584 | usage(_("unknown -z option"), dash_z_arg); |
| 585 | } |
| 586 | |
| 587 | return retval; |
| 588 | } |
| 589 | |
| 590 | } // End anonymous namespace. |
| 591 | |
| 592 | namespace gold |
| 593 | { |
| 594 | |
| 595 | General_options::General_options() |
| 596 | : execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false), |
| 597 | do_demangle_(false) |
| 598 | { |
| 599 | } |
| 600 | |
| 601 | General_options::Object_format |
| 602 | General_options::format_enum() const |
| 603 | { |
| 604 | return string_to_object_format(this->format()); |
| 605 | } |
| 606 | |
| 607 | General_options::Object_format |
| 608 | General_options::oformat_enum() const |
| 609 | { |
| 610 | return string_to_object_format(this->oformat()); |
| 611 | } |
| 612 | |
| 613 | // Add the sysroot, if any, to the search paths. |
| 614 | |
| 615 | void |
| 616 | General_options::add_sysroot() |
| 617 | { |
| 618 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') |
| 619 | { |
| 620 | this->set_sysroot(get_default_sysroot()); |
| 621 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') |
| 622 | return; |
| 623 | } |
| 624 | |
| 625 | char* canonical_sysroot = lrealpath(this->sysroot()); |
| 626 | |
| 627 | for (Dir_list::iterator p = this->library_path_.value.begin(); |
| 628 | p != this->library_path_.value.end(); |
| 629 | ++p) |
| 630 | p->add_sysroot(this->sysroot(), canonical_sysroot); |
| 631 | |
| 632 | free(canonical_sysroot); |
| 633 | } |
| 634 | |
| 635 | // Set up variables and other state that isn't set up automatically by |
| 636 | // the parse routine, and ensure options don't contradict each other |
| 637 | // and are otherwise kosher. |
| 638 | |
| 639 | void |
| 640 | General_options::finalize() |
| 641 | { |
| 642 | // Normalize the strip modifiers. They have a total order: |
| 643 | // strip_all > strip_debug > strip_non_line > strip_debug_gdb. |
| 644 | // If one is true, set all beneath it to true as well. |
| 645 | if (this->strip_all()) |
| 646 | this->set_strip_debug(true); |
| 647 | if (this->strip_debug()) |
| 648 | this->set_strip_debug_non_line(true); |
| 649 | if (this->strip_debug_non_line()) |
| 650 | this->set_strip_debug_gdb(true); |
| 651 | |
| 652 | // If the user specifies both -s and -r, convert the -s to -S. |
| 653 | // -r requires us to keep externally visible symbols! |
| 654 | if (this->strip_all() && this->relocatable()) |
| 655 | { |
| 656 | this->set_strip_all(false); |
| 657 | gold_assert(this->strip_debug()); |
| 658 | } |
| 659 | |
| 660 | // For us, -dc and -dp are synonyms for --define-common. |
| 661 | if (this->dc()) |
| 662 | this->set_define_common(true); |
| 663 | if (this->dp()) |
| 664 | this->set_define_common(true); |
| 665 | |
| 666 | // We also set --define-common if we're not relocatable, as long as |
| 667 | // the user didn't explicitly ask for something different. |
| 668 | if (!this->user_set_define_common()) |
| 669 | this->set_define_common(!this->relocatable()); |
| 670 | |
| 671 | // execstack_status_ is a three-state variable; update it based on |
| 672 | // -z [no]execstack. |
| 673 | if (this->execstack()) |
| 674 | this->set_execstack_status(EXECSTACK_YES); |
| 675 | else if (this->noexecstack()) |
| 676 | this->set_execstack_status(EXECSTACK_NO); |
| 677 | |
| 678 | // Handle the optional argument for --demangle. |
| 679 | if (this->user_set_demangle()) |
| 680 | { |
| 681 | this->set_do_demangle(true); |
| 682 | const char* style = this->demangle(); |
| 683 | if (*style != '\0') |
| 684 | { |
| 685 | enum demangling_styles style_code; |
| 686 | |
| 687 | style_code = cplus_demangle_name_to_style(style); |
| 688 | if (style_code == unknown_demangling) |
| 689 | gold_fatal("unknown demangling style '%s'", style); |
| 690 | cplus_demangle_set_style(style_code); |
| 691 | } |
| 692 | } |
| 693 | else if (this->user_set_no_demangle()) |
| 694 | this->set_do_demangle(false); |
| 695 | else |
| 696 | { |
| 697 | // Testing COLLECT_NO_DEMANGLE makes our default demangling |
| 698 | // behaviour identical to that of gcc's linker wrapper. |
| 699 | this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL); |
| 700 | } |
| 701 | |
| 702 | // -M is equivalent to "-Map -". |
| 703 | if (this->print_map() && !this->user_set_Map()) |
| 704 | { |
| 705 | this->set_Map("-"); |
| 706 | this->set_user_set_Map(); |
| 707 | } |
| 708 | |
| 709 | // If --thread_count is specified, it applies to |
| 710 | // --thread-count-{initial,middle,final}, though it doesn't override |
| 711 | // them. |
| 712 | if (this->thread_count() > 0 && this->thread_count_initial() == 0) |
| 713 | this->set_thread_count_initial(this->thread_count()); |
| 714 | if (this->thread_count() > 0 && this->thread_count_middle() == 0) |
| 715 | this->set_thread_count_middle(this->thread_count()); |
| 716 | if (this->thread_count() > 0 && this->thread_count_final() == 0) |
| 717 | this->set_thread_count_final(this->thread_count()); |
| 718 | |
| 719 | // Let's warn if you set the thread-count but we're going to ignore it. |
| 720 | #ifndef ENABLE_THREADS |
| 721 | if (this->threads()) |
| 722 | { |
| 723 | gold_warning(_("ignoring --threads: " |
| 724 | "%s was compiled without thread support"), |
| 725 | program_name); |
| 726 | this->set_threads(false); |
| 727 | } |
| 728 | if (this->thread_count() > 0 || this->thread_count_initial() > 0 |
| 729 | || this->thread_count_middle() > 0 || this->thread_count_final() > 0) |
| 730 | gold_warning(_("ignoring --thread-count: " |
| 731 | "%s was compiled without thread support"), |
| 732 | program_name); |
| 733 | #endif |
| 734 | |
| 735 | if (this->user_set_Y()) |
| 736 | { |
| 737 | std::string s = this->Y(); |
| 738 | if (s.compare(0, 2, "P,") == 0) |
| 739 | s.erase(0, 2); |
| 740 | |
| 741 | size_t pos = 0; |
| 742 | size_t next_pos; |
| 743 | do |
| 744 | { |
| 745 | next_pos = s.find(':', pos); |
| 746 | size_t len = (next_pos == std::string::npos |
| 747 | ? next_pos |
| 748 | : next_pos - pos); |
| 749 | if (len != 0) |
| 750 | this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str()); |
| 751 | pos = next_pos + 1; |
| 752 | } |
| 753 | while (next_pos != std::string::npos); |
| 754 | } |
| 755 | else |
| 756 | { |
| 757 | // Even if they don't specify it, we add -L /lib and -L /usr/lib. |
| 758 | // FIXME: We should only do this when configured in native mode. |
| 759 | this->add_to_library_path_with_sysroot("/lib"); |
| 760 | this->add_to_library_path_with_sysroot("/usr/lib"); |
| 761 | } |
| 762 | |
| 763 | // Normalize library_path() by adding the sysroot to all directories |
| 764 | // in the path, as appropriate. |
| 765 | this->add_sysroot(); |
| 766 | |
| 767 | // Now that we've normalized the options, check for contradictory ones. |
| 768 | if (this->shared() && this->relocatable()) |
| 769 | gold_fatal(_("-shared and -r are incompatible")); |
| 770 | |
| 771 | if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF |
| 772 | && (this->shared() || this->relocatable())) |
| 773 | gold_fatal(_("binary output format not compatible with -shared or -r")); |
| 774 | |
| 775 | if (this->user_set_hash_bucket_empty_fraction() |
| 776 | && (this->hash_bucket_empty_fraction() < 0.0 |
| 777 | || this->hash_bucket_empty_fraction() >= 1.0)) |
| 778 | gold_fatal(_("--hash-bucket-empty-fraction value %g out of range " |
| 779 | "[0.0, 1.0)"), |
| 780 | this->hash_bucket_empty_fraction()); |
| 781 | |
| 782 | // FIXME: we can/should be doing a lot more sanity checking here. |
| 783 | } |
| 784 | |
| 785 | // Search_directory methods. |
| 786 | |
| 787 | // This is called if we have a sysroot. Apply the sysroot if |
| 788 | // appropriate. Record whether the directory is in the sysroot. |
| 789 | |
| 790 | void |
| 791 | Search_directory::add_sysroot(const char* sysroot, |
| 792 | const char* canonical_sysroot) |
| 793 | { |
| 794 | gold_assert(*sysroot != '\0'); |
| 795 | if (this->put_in_sysroot_) |
| 796 | { |
| 797 | if (!IS_DIR_SEPARATOR(this->name_[0]) |
| 798 | && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1])) |
| 799 | this->name_ = '/' + this->name_; |
| 800 | this->name_ = sysroot + this->name_; |
| 801 | this->is_in_sysroot_ = true; |
| 802 | } |
| 803 | else |
| 804 | { |
| 805 | // Check whether this entry is in the sysroot. To do this |
| 806 | // correctly, we need to use canonical names. Otherwise we will |
| 807 | // get confused by the ../../.. paths that gcc tends to use. |
| 808 | char* canonical_name = lrealpath(this->name_.c_str()); |
| 809 | int canonical_name_len = strlen(canonical_name); |
| 810 | int canonical_sysroot_len = strlen(canonical_sysroot); |
| 811 | if (canonical_name_len > canonical_sysroot_len |
| 812 | && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len])) |
| 813 | { |
| 814 | canonical_name[canonical_sysroot_len] = '\0'; |
| 815 | if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0) |
| 816 | this->is_in_sysroot_ = true; |
| 817 | } |
| 818 | free(canonical_name); |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | // Input_arguments methods. |
| 823 | |
| 824 | // Add a file to the list. |
| 825 | |
| 826 | void |
| 827 | Input_arguments::add_file(const Input_file_argument& file) |
| 828 | { |
| 829 | if (!this->in_group_) |
| 830 | this->input_argument_list_.push_back(Input_argument(file)); |
| 831 | else |
| 832 | { |
| 833 | gold_assert(!this->input_argument_list_.empty()); |
| 834 | gold_assert(this->input_argument_list_.back().is_group()); |
| 835 | this->input_argument_list_.back().group()->add_file(file); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | // Start a group. |
| 840 | |
| 841 | void |
| 842 | Input_arguments::start_group() |
| 843 | { |
| 844 | if (this->in_group_) |
| 845 | gold_fatal(_("May not nest groups")); |
| 846 | Input_file_group* group = new Input_file_group(); |
| 847 | this->input_argument_list_.push_back(Input_argument(group)); |
| 848 | this->in_group_ = true; |
| 849 | } |
| 850 | |
| 851 | // End a group. |
| 852 | |
| 853 | void |
| 854 | Input_arguments::end_group() |
| 855 | { |
| 856 | if (!this->in_group_) |
| 857 | gold_fatal(_("Group end without group start")); |
| 858 | this->in_group_ = false; |
| 859 | } |
| 860 | |
| 861 | // Command_line options. |
| 862 | |
| 863 | Command_line::Command_line() |
| 864 | { |
| 865 | } |
| 866 | |
| 867 | // Process the command line options. For process_one_option, i is the |
| 868 | // index of argv to process next, and must be an option (that is, |
| 869 | // start with a dash). The return value is the index of the next |
| 870 | // option to process (i+1 or i+2, or argc to indicate processing is |
| 871 | // done). no_more_options is set to true if (and when) "--" is seen |
| 872 | // as an option. |
| 873 | |
| 874 | int |
| 875 | Command_line::process_one_option(int argc, const char** argv, int i, |
| 876 | bool* no_more_options) |
| 877 | { |
| 878 | gold_assert(argv[i][0] == '-' && !(*no_more_options)); |
| 879 | |
| 880 | // If we are reading "--", then just set no_more_options and return. |
| 881 | if (argv[i][1] == '-' && argv[i][2] == '\0') |
| 882 | { |
| 883 | *no_more_options = true; |
| 884 | return i + 1; |
| 885 | } |
| 886 | |
| 887 | int new_i = i; |
| 888 | options::One_option* option = NULL; |
| 889 | const char* arg = NULL; |
| 890 | |
| 891 | // First, try to process argv as a long option. |
| 892 | option = parse_long_option(argc, argv, false, &arg, &new_i); |
| 893 | if (option) |
| 894 | { |
| 895 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); |
| 896 | return new_i; |
| 897 | } |
| 898 | |
| 899 | // Now, try to process argv as a short option. Since several short |
| 900 | // options can be combined in one argv, we may have to parse a lot |
| 901 | // until we're done reading this argv. |
| 902 | int pos_in_argv_i = 1; |
| 903 | while (new_i == i) |
| 904 | { |
| 905 | option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i); |
| 906 | if (!option) |
| 907 | break; |
| 908 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); |
| 909 | ++pos_in_argv_i; |
| 910 | } |
| 911 | if (option) |
| 912 | return new_i; |
| 913 | |
| 914 | // I guess it's neither a long option nor a short option. |
| 915 | usage(_("unknown option"), argv[i]); |
| 916 | return argc; |
| 917 | } |
| 918 | |
| 919 | |
| 920 | void |
| 921 | Command_line::process(int argc, const char** argv) |
| 922 | { |
| 923 | bool no_more_options = false; |
| 924 | int i = 0; |
| 925 | while (i < argc) |
| 926 | { |
| 927 | this->position_options_.copy_from_options(this->options()); |
| 928 | if (no_more_options || argv[i][0] != '-') |
| 929 | { |
| 930 | Input_file_argument file(argv[i], false, "", false, |
| 931 | this->position_options_); |
| 932 | this->inputs_.add_file(file); |
| 933 | ++i; |
| 934 | } |
| 935 | else |
| 936 | i = process_one_option(argc, argv, i, &no_more_options); |
| 937 | } |
| 938 | |
| 939 | if (this->inputs_.in_group()) |
| 940 | { |
| 941 | fprintf(stderr, _("%s: missing group end\n"), program_name); |
| 942 | usage(); |
| 943 | } |
| 944 | |
| 945 | // Normalize the options and ensure they don't contradict each other. |
| 946 | this->options_.finalize(); |
| 947 | } |
| 948 | |
| 949 | } // End namespace gold. |