1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
28 #include "filenames.h"
29 #include "libiberty.h"
38 // The information we keep for a single command line option.
40 struct options::One_option
42 // The single character option name, or '\0' if this is only a long
46 // The long option name, or NULL if this is only a short option.
47 const char* long_option;
49 // Description of the option for --help output, or NULL if there is none.
52 // How to print the option name in --help output, or NULL to use the
54 const char* help_output;
56 // Long option dash control. This is ignored if long_option is
60 // Long option normally takes one dash; two dashes are also
63 // Long option normally takes two dashes; one dash is also
66 // Long option always takes two dashes.
70 // Function for special handling, or NULL. Returns the number of
71 // arguments to skip. This will normally be at least 1, but it may
72 // be 0 if this function changes *argv. ARG points to the location
73 // in *ARGV where the option starts, which may be helpful for a
75 int (*special)(int argc, char** argv, char *arg, bool long_option,
78 // If this is a position independent option which does not take an
79 // argument, this is the member function to call to record it. (In
80 // this file, the bool will always be 'true' to indicate the option
82 void (General_options::*general_noarg)(bool);
84 // If this is a position independent function which takes an
85 // argument, this is the member function to call to record it.
86 void (General_options::*general_arg)(const char*);
88 // If this is a position dependent option which does not take an
89 // argument, this is the member function to call to record it. (In
90 // this file, the bool will always be 'true' to indicate the option
92 void (Position_dependent_options::*dependent_noarg)(bool);
94 // If this is a position dependent option which takes an argument,
95 // this is the member function to record it.
96 void (Position_dependent_options::*dependent_arg)(const char*);
98 // Return whether this option takes an argument.
100 takes_argument() const
101 { return this->general_arg != NULL || this->dependent_arg != NULL; }
104 // We have a separate table for -z options.
106 struct options::One_z_option
108 // The name of the option.
111 // The member function in General_options called to record an option
112 // which does not take an argument.
113 void (General_options::*set_noarg)(bool);
115 // The member function in General_options called to record an option
116 // which does take an argument.
117 void (General_options::*set_arg)(const char*);
120 // We have a separate table for --debug options.
122 struct options::One_debug_option
124 // The name of the option.
127 // The flags to turn on.
128 unsigned int debug_flags;
131 class options::Command_line_options
134 static const One_option options[];
135 static const int options_size;
136 static const One_z_option z_options[];
137 static const int z_options_size;
138 static const One_debug_option debug_options[];
139 static const int debug_options_size;
142 } // End namespace gold.
147 // Recognize input and output target names. The GNU linker accepts
148 // these with --format and --oformat. This code is intended to be
149 // minimally compatible. In practice for an ELF target this would be
150 // the same target as the input files; that name always start with
151 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
152 // "binary", "ihex". See also
153 // General_options::default_target_settings.
155 gold::General_options::Object_format
156 string_to_object_format(const char* arg)
158 if (strncmp(arg, "elf", 3) == 0)
159 return gold::General_options::OBJECT_FORMAT_ELF;
160 else if (strcmp(arg, "binary") == 0)
161 return gold::General_options::OBJECT_FORMAT_BINARY;
164 gold::gold_error(_("format '%s' not supported "
165 "(supported formats: elf, binary)"),
167 return gold::General_options::OBJECT_FORMAT_ELF;
171 // Handle the special -defsym option, which defines a symbol.
174 add_to_defsym(int argc, char** argv, char* arg, bool long_option,
175 gold::Command_line* cmdline)
178 const char* val = cmdline->get_special_argument("defsym", argc, argv, arg,
180 cmdline->script_options().define_symbol(val);
184 // Handle the special -l option, which adds an input file.
187 library(int argc, char** argv, char* arg, bool long_option,
188 gold::Command_line* cmdline)
190 return cmdline->process_l_option(argc, argv, arg, long_option);
193 // Handle the -R option. Historically the GNU linker made -R a
194 // synonym for --just-symbols. ELF linkers have traditionally made -R
195 // a synonym for -rpath. When ELF support was added to the GNU
196 // linker, -R was changed to switch based on the argument: if the
197 // argument is an ordinary file, we treat it as --just-symbols,
198 // otherwise we treat it as -rpath. We need to be compatible with
199 // this, because existing build scripts rely on it.
202 handle_r_option(int argc, char** argv, char* arg, bool long_option,
203 gold::Command_line* cmdline)
206 const char* val = cmdline->get_special_argument("R", argc, argv, arg,
209 if (::stat(val, &s) != 0 || S_ISDIR(s.st_mode))
210 cmdline->add_to_rpath(val);
212 cmdline->add_just_symbols_file(val);
216 // Handle the --just-symbols option.
219 handle_just_symbols_option(int argc, char** argv, char* arg,
220 bool long_option, gold::Command_line* cmdline)
223 const char* val = cmdline->get_special_argument("just-symbols", argc, argv,
224 arg, long_option, &ret);
225 cmdline->add_just_symbols_file(val);
229 // Handle the special -T/--script option, which reads a linker script.
232 invoke_script(int argc, char** argv, char* arg, bool long_option,
233 gold::Command_line* cmdline)
236 const char* script_name = cmdline->get_special_argument("script", argc, argv,
239 if (!read_commandline_script(script_name, cmdline))
240 gold::gold_fatal(_("unable to parse script file %s"), script_name);
244 // Handle the special --version-script option, which reads a version script.
247 invoke_version_script(int argc, char** argv, char* arg, bool long_option,
248 gold::Command_line* cmdline)
251 const char* script_name = cmdline->get_special_argument("version-script",
255 if (!read_version_script(script_name, cmdline))
256 gold::gold_fatal(_("unable to parse version script file %s"), script_name);
260 // Handle the special --start-group option.
263 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
265 cmdline->start_group(arg);
269 // Handle the special --end-group option.
272 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
274 cmdline->end_group(arg);
278 // Report usage information for ld --help, and exit.
281 help(int, char**, char*, bool, gold::Command_line*)
283 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
285 const int options_size = gold::options::Command_line_options::options_size;
286 const gold::options::One_option* options =
287 gold::options::Command_line_options::options;
288 for (int i = 0; i < options_size; ++i)
290 if (options[i].doc == NULL)
300 if (options[j].help_output != NULL)
307 printf(options[j].help_output);
308 len += std::strlen(options[j].help_output);
313 if (options[j].short_option != '\0')
320 printf("-%c", options[j].short_option);
325 if (options[j].long_option != NULL)
332 if (options[j].dash == gold::options::One_option::ONE_DASH)
342 printf("%s", options[j].long_option);
343 len += std::strlen(options[j].long_option);
349 while (j < options_size && options[j].doc == NULL);
356 for (; len < 30; ++len)
359 std::puts(options[i].doc);
362 ::exit(EXIT_SUCCESS);
367 // Report version information.
370 version(int, char**, char* opt, bool, gold::Command_line*)
372 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
373 ::exit(EXIT_SUCCESS);
377 // If the default sysroot is relocatable, try relocating it based on
381 get_relative_sysroot(const char* from)
383 char* path = make_relative_prefix(gold::program_name, from,
388 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
396 // Return the default sysroot. This is set by the --with-sysroot
397 // option to configure.
400 get_default_sysroot()
402 const char* sysroot = TARGET_SYSTEM_ROOT;
403 if (*sysroot == '\0')
406 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
408 char* path = get_relative_sysroot (BINDIR);
410 path = get_relative_sysroot (TOOLBINDIR);
413 std::string ret = path;
422 } // End anonymous namespace.
427 // Helper macros used to specify the options. We could also do this
428 // using constructors, but then g++ would generate code to initialize
429 // the array. We want the array to be initialized statically so that
430 // we get better startup time.
432 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
433 { short_option, long_option, doc, help, options::One_option::dash, \
434 NULL, func, NULL, NULL, NULL }
435 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
436 { short_option, long_option, doc, help, options::One_option::dash, \
437 NULL, NULL, func, NULL, NULL }
438 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
439 { short_option, long_option, doc, help, options::One_option::dash, \
440 NULL, NULL, NULL, func, NULL }
441 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
442 { short_option, long_option, doc, help, options::One_option::dash, \
443 NULL, NULL, NULL, NULL, func }
444 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
445 { short_option, long_option, doc, help, options::One_option::dash, \
446 func, NULL, NULL, NULL, NULL }
448 // Here is the actual list of options which we accept.
450 const options::One_option
451 options::Command_line_options::options[] =
453 GENERAL_NOARG('\0', "allow-shlib-undefined",
454 N_("Allow unresolved references in shared libraries"),
456 &General_options::set_allow_shlib_undefined),
457 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
458 N_("Do not allow unresolved references in shared libraries"),
460 &General_options::set_no_allow_shlib_undefined),
461 POSDEP_NOARG('\0', "as-needed",
462 N_("Only set DT_NEEDED for dynamic libs if used"),
463 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
464 POSDEP_NOARG('\0', "no-as-needed",
465 N_("Always DT_NEEDED for dynamic libs (default)"),
466 NULL, TWO_DASHES, &Position_dependent_options::set_no_as_needed),
467 POSDEP_NOARG('\0', "Bdynamic",
468 N_("-l searches for shared libraries"),
470 &Position_dependent_options::set_Bdynamic),
471 POSDEP_NOARG('\0', "Bstatic",
472 N_("-l does not search for shared libraries"),
474 &Position_dependent_options::set_Bstatic),
475 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
476 NULL, ONE_DASH, &General_options::set_Bsymbolic),
477 POSDEP_ARG('b', "format", N_("Set input format (elf, binary)"),
478 N_("-b FORMAT, --format FORMAT"), TWO_DASHES,
479 &Position_dependent_options::set_format),
481 # define ZLIB_STR ",zlib"
485 GENERAL_ARG('\0', "compress-debug-sections",
486 N_("Compress .debug_* sections in the output file "
487 "(default is none)"),
488 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
490 &General_options::set_compress_debug_sections),
491 GENERAL_NOARG('d', "define-common", N_("Define common symbols"),
492 NULL, TWO_DASHES, &General_options::set_define_common),
493 GENERAL_NOARG('\0', "dc", NULL, NULL, ONE_DASH,
494 &General_options::set_define_common),
495 GENERAL_NOARG('\0', "dp", NULL, NULL, ONE_DASH,
496 &General_options::set_define_common),
497 GENERAL_NOARG('\0', "no-define-common", N_("Do not define common symbols"),
498 NULL, TWO_DASHES, &General_options::set_no_define_common),
499 SPECIAL('\0', "defsym", N_("Define a symbol"),
500 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES,
502 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
503 NULL, TWO_DASHES, &General_options::set_demangle),
504 GENERAL_NOARG('\0', "no-demangle",
505 N_("Do not demangle C++ symbols in log messages"),
506 NULL, TWO_DASHES, &General_options::set_no_demangle),
507 GENERAL_NOARG('\0', "detect-odr-violations",
508 N_("Try to detect violations of the One Definition Rule"),
509 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
510 GENERAL_ARG('e', "entry", N_("Set program start address"),
511 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
512 &General_options::set_entry),
513 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
514 NULL, TWO_DASHES, &General_options::set_export_dynamic),
515 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
516 NULL, TWO_DASHES, &General_options::set_eh_frame_hdr),
517 GENERAL_ARG('h', "soname", N_("Set shared library name"),
518 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
519 &General_options::set_soname),
520 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
521 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
522 &General_options::set_dynamic_linker),
523 SPECIAL('l', "library", N_("Search for library LIBNAME"),
524 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
526 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
527 N_("-L DIR, --library-path DIR"), TWO_DASHES,
528 &General_options::add_to_search_path),
529 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
530 &General_options::ignore),
531 GENERAL_ARG('o', "output", N_("Set output file name"),
532 N_("-o FILE, --output FILE"), TWO_DASHES,
533 &General_options::set_output),
534 GENERAL_ARG('O', "optimize", N_("Optimize output file size"),
535 N_("-O level"), ONE_DASH,
536 &General_options::set_optimize),
537 GENERAL_ARG('\0', "oformat", N_("Set output format (only binary supported)"),
538 N_("--oformat FORMAT"), EXACTLY_TWO_DASHES,
539 &General_options::set_oformat),
540 GENERAL_NOARG('q', "emit-relocs", N_("Generate relocations in output"),
541 NULL, TWO_DASHES, &General_options::set_emit_relocs),
542 GENERAL_NOARG('r', "relocatable", N_("Generate relocatable output"), NULL,
543 TWO_DASHES, &General_options::set_relocatable),
544 // -R really means -rpath, but can mean --just-symbols for
545 // compatibility with GNU ld. -rpath is always -rpath, so we list
547 SPECIAL('R', NULL, N_("Add DIR to runtime search path"),
548 N_("-R DIR"), ONE_DASH, &handle_r_option),
549 GENERAL_ARG('\0', "rpath", NULL, N_("-rpath DIR"), ONE_DASH,
550 &General_options::add_to_rpath),
551 SPECIAL('\0', "just-symbols", N_("Read only symbol values from file"),
552 N_("-R FILE, --just-symbols FILE"), TWO_DASHES,
553 &handle_just_symbols_option),
554 GENERAL_ARG('\0', "rpath-link",
555 N_("Add DIR to link time shared library search path"),
556 N_("--rpath-link DIR"), TWO_DASHES,
557 &General_options::add_to_rpath_link),
558 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
559 TWO_DASHES, &General_options::set_strip_all),
560 GENERAL_NOARG('\0', "strip-debug-gdb",
561 N_("Strip debug symbols that are unused by gdb "
562 "(at least versions <= 6.7)"),
563 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
564 // This must come after -Sdebug since it's a prefix of it.
565 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
566 TWO_DASHES, &General_options::set_strip_debug),
567 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
568 NULL, ONE_DASH, &General_options::set_shared),
569 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
570 NULL, ONE_DASH, &General_options::set_static),
571 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
572 NULL, TWO_DASHES, &General_options::set_stats),
573 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
574 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
575 GENERAL_ARG('\0', "Tbss", N_("Set the address of the bss segment"),
576 N_("-Tbss ADDRESS"), ONE_DASH,
577 &General_options::set_Tbss),
578 GENERAL_ARG('\0', "Tdata", N_("Set the address of the data segment"),
579 N_("-Tdata ADDRESS"), ONE_DASH,
580 &General_options::set_Tdata),
581 GENERAL_ARG('\0', "Ttext", N_("Set the address of the text segment"),
582 N_("-Ttext ADDRESS"), ONE_DASH,
583 &General_options::set_Ttext),
584 // This must come after -Ttext and friends since it's a prefix of
586 SPECIAL('T', "script", N_("Read linker script"),
587 N_("-T FILE, --script FILE"), TWO_DASHES,
589 SPECIAL('\0', "version-script", N_("Read version script"),
590 N_("--version-script FILE"), TWO_DASHES,
591 &invoke_version_script),
592 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
593 NULL, TWO_DASHES, &General_options::set_threads),
594 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
595 NULL, TWO_DASHES, &General_options::set_no_threads),
596 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
597 N_("--thread-count COUNT"), TWO_DASHES,
598 &General_options::set_thread_count),
599 GENERAL_ARG('\0', "thread-count-initial",
600 N_("Number of threads to use in initial pass"),
601 N_("--thread-count-initial COUNT"), TWO_DASHES,
602 &General_options::set_thread_count_initial),
603 GENERAL_ARG('\0', "thread-count-middle",
604 N_("Number of threads to use in middle pass"),
605 N_("--thread-count-middle COUNT"), TWO_DASHES,
606 &General_options::set_thread_count_middle),
607 GENERAL_ARG('\0', "thread-count-final",
608 N_("Number of threads to use in final pass"),
609 N_("--thread-count-final COUNT"), TWO_DASHES,
610 &General_options::set_thread_count_final),
611 POSDEP_NOARG('\0', "whole-archive",
612 N_("Include all archive contents"),
614 &Position_dependent_options::set_whole_archive),
615 POSDEP_NOARG('\0', "no-whole-archive",
616 N_("Include only needed archive contents"),
618 &Position_dependent_options::set_no_whole_archive),
620 GENERAL_ARG('z', NULL,
621 N_("Subcommands as follows:\n\
622 -z execstack Mark output as requiring executable stack\n\
623 -z noexecstack Mark output as not requiring executable stack\n\
624 -z max-page-size=SIZE Set maximum page size to SIZE\n\
625 -z common-page-size=SIZE Set common page size to SIZE"),
626 N_("-z SUBCOMMAND"), ONE_DASH,
627 &General_options::handle_z_option),
629 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
630 TWO_DASHES, &start_group),
631 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
632 TWO_DASHES, &end_group),
633 SPECIAL('\0', "help", N_("Report usage information"), NULL,
635 SPECIAL('v', "version", N_("Report version information"), NULL,
636 TWO_DASHES, &version),
637 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task,script)"),
638 N_("--debug=TYPE"), TWO_DASHES,
639 &General_options::handle_debug_option)
642 const int options::Command_line_options::options_size =
643 sizeof (options) / sizeof (options[0]);
647 const options::One_z_option
648 options::Command_line_options::z_options[] =
650 { "execstack", &General_options::set_execstack, NULL },
651 { "noexecstack", &General_options::set_noexecstack, NULL },
652 { "max-page-size", NULL, &General_options::set_max_page_size },
653 { "common-page-size", NULL, &General_options::set_common_page_size }
656 const int options::Command_line_options::z_options_size =
657 sizeof(z_options) / sizeof(z_options[0]);
659 // The --debug options.
661 const options::One_debug_option
662 options::Command_line_options::debug_options[] =
664 { "all", DEBUG_ALL },
665 { "task", DEBUG_TASK },
666 { "script", DEBUG_SCRIPT }
669 const int options::Command_line_options::debug_options_size =
670 sizeof(debug_options) / sizeof(debug_options[0]);
672 // The default values for the general options.
674 General_options::General_options()
675 : define_common_(false),
676 user_set_define_common_(false),
678 export_dynamic_(false),
680 dynamic_linker_(NULL),
682 optimization_level_(0),
683 output_file_name_("a.out"),
684 oformat_(OBJECT_FORMAT_ELF),
685 oformat_string_(NULL),
687 is_relocatable_(false),
689 allow_shlib_undefined_(false),
691 compress_debug_sections_(NO_COMPRESSION),
692 detect_odr_violations_(false),
693 create_eh_frame_hdr_(false),
700 bss_segment_address_(-1U), // -1 indicates value not set by user
701 data_segment_address_(-1U),
702 text_segment_address_(-1U),
704 thread_count_initial_(0),
705 thread_count_middle_(0),
706 thread_count_final_(0),
707 execstack_(EXECSTACK_FROM_INPUT),
709 common_page_size_(0),
712 // We initialize demangle_ based on the environment variable
713 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
714 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
715 // environment. Acting the same way here lets us provide the same
716 // interface by default.
717 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
720 // Handle the --oformat option.
723 General_options::set_oformat(const char* arg)
725 this->oformat_string_ = arg;
726 this->oformat_ = string_to_object_format(arg);
729 // Handle the -z option.
732 General_options::handle_z_option(const char* arg)
734 // ARG may be a word, like "noexec", or it may be an option in its
735 // own right, like "max-page-size=SIZE".
736 const char* argarg = strchr(arg, '='); // the argument to the -z argument
740 arglen = argarg - arg;
744 arglen = strlen(arg);
746 const int z_options_size = options::Command_line_options::z_options_size;
747 const gold::options::One_z_option* z_options =
748 gold::options::Command_line_options::z_options;
749 for (int i = 0; i < z_options_size; ++i)
751 if (memcmp(arg, z_options[i].name, arglen) == 0
752 && z_options[i].name[arglen] == '\0')
754 if (z_options[i].set_noarg && argarg)
755 gold::gold_fatal(_("-z subcommand does not take an argument: %s\n"),
757 else if (z_options[i].set_arg && !argarg)
758 gold::gold_fatal(_("-z subcommand requires an argument: %s\n"),
760 else if (z_options[i].set_arg)
761 (this->*(z_options[i].set_arg))(argarg);
763 (this->*(z_options[i].set_noarg))(true);
768 gold::gold_fatal(_("%s: unrecognized -z subcommand: %s\n"),
772 // Handle the --debug option.
775 General_options::handle_debug_option(const char* arg)
777 const int debug_options_size =
778 options::Command_line_options::debug_options_size;
779 const gold::options::One_debug_option* debug_options =
780 options::Command_line_options::debug_options;
781 for (int i = 0; i < debug_options_size; ++i)
783 if (strcmp(arg, debug_options[i].name) == 0)
785 this->set_debug(debug_options[i].debug_flags);
790 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
792 ::exit(EXIT_FAILURE);
795 // Add the sysroot, if any, to the search paths.
798 General_options::add_sysroot()
800 if (this->sysroot_.empty())
802 this->sysroot_ = get_default_sysroot();
803 if (this->sysroot_.empty())
807 const char* sysroot = this->sysroot_.c_str();
808 char* canonical_sysroot = lrealpath(sysroot);
810 for (Dir_list::iterator p = this->search_path_.begin();
811 p != this->search_path_.end();
813 p->add_sysroot(sysroot, canonical_sysroot);
815 free(canonical_sysroot);
818 // The default values for the position dependent options.
820 Position_dependent_options::Position_dependent_options()
821 : do_static_search_(false),
823 include_whole_archive_(false),
824 input_format_(General_options::OBJECT_FORMAT_ELF)
828 // Set the input format.
831 Position_dependent_options::set_format(const char* arg)
833 this->input_format_ = string_to_object_format(arg);
836 // Search_directory methods.
838 // This is called if we have a sysroot. Apply the sysroot if
839 // appropriate. Record whether the directory is in the sysroot.
842 Search_directory::add_sysroot(const char* sysroot,
843 const char* canonical_sysroot)
845 gold_assert(*sysroot != '\0');
846 if (this->put_in_sysroot_)
848 if (!IS_DIR_SEPARATOR(this->name_[0])
849 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
850 this->name_ = '/' + this->name_;
851 this->name_ = sysroot + this->name_;
852 this->is_in_sysroot_ = true;
856 // Check whether this entry is in the sysroot. To do this
857 // correctly, we need to use canonical names. Otherwise we will
858 // get confused by the ../../.. paths that gcc tends to use.
859 char* canonical_name = lrealpath(this->name_.c_str());
860 int canonical_name_len = strlen(canonical_name);
861 int canonical_sysroot_len = strlen(canonical_sysroot);
862 if (canonical_name_len > canonical_sysroot_len
863 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
865 canonical_name[canonical_sysroot_len] = '\0';
866 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
867 this->is_in_sysroot_ = true;
869 free(canonical_name);
873 // Input_arguments methods.
875 // Add a file to the list.
878 Input_arguments::add_file(const Input_file_argument& file)
880 if (!this->in_group_)
881 this->input_argument_list_.push_back(Input_argument(file));
884 gold_assert(!this->input_argument_list_.empty());
885 gold_assert(this->input_argument_list_.back().is_group());
886 this->input_argument_list_.back().group()->add_file(file);
893 Input_arguments::start_group()
895 gold_assert(!this->in_group_);
896 Input_file_group* group = new Input_file_group();
897 this->input_argument_list_.push_back(Input_argument(group));
898 this->in_group_ = true;
904 Input_arguments::end_group()
906 gold_assert(this->in_group_);
907 this->in_group_ = false;
910 // Command_line options.
912 Command_line::Command_line()
913 : options_(), position_options_(), script_options_(), inputs_()
917 // Process the command line options. For process_one_option,
918 // i is the index of argv to process next, and the return value
919 // is the index of the next option to process (i+1 or i+2, or argc
920 // to indicate processing is done). no_more_options is set to true
921 // if (and when) "--" is seen as an option.
924 Command_line::process_one_option(int argc, char** argv, int i,
925 bool* no_more_options)
927 const int options_size = options::Command_line_options::options_size;
928 const options::One_option* options = options::Command_line_options::options;
929 gold_assert(i < argc);
931 if (argv[i][0] != '-' || *no_more_options)
933 this->add_file(argv[i], false);
937 // Option starting with '-'.
939 if (argv[i][1] == '-')
942 if (argv[i][2] == '\0')
944 *no_more_options = true;
949 // Look for a long option match.
950 char* opt = argv[i] + dashes;
953 char* arg = strchr(opt, '=');
954 bool argument_with_equals = arg != NULL;
960 else if (i + 1 < argc)
967 for (j = 0; j < options_size; ++j)
969 if (options[j].long_option != NULL
972 != options::One_option::EXACTLY_TWO_DASHES))
973 && first == options[j].long_option[0]
974 && strcmp(opt, options[j].long_option) == 0)
976 if (options[j].special)
978 // Restore the '=' we clobbered above.
979 if (arg != NULL && skiparg == 0)
981 i += options[j].special(argc - i, argv + i, opt, true, this);
985 if (!options[j].takes_argument())
987 if (argument_with_equals)
988 this->usage(_("unexpected argument"), argv[i]);
995 this->usage(_("missing argument"), argv[i]);
997 this->apply_option(options[j], arg);
1003 if (j < options_size)
1006 // If we saw two dashes, we needed to have seen a long option.
1008 this->usage(_("unknown option"), argv[i]);
1010 // Look for a short option match. There may be more than one
1011 // short option in a given argument.
1013 char* s = argv[i] + 1;
1015 while (*s != '\0' && !done)
1019 for (j = 0; j < options_size; ++j)
1021 if (options[j].short_option == opt)
1023 if (options[j].special)
1025 // Undo the argument skip done above.
1027 i += options[j].special(argc - i, argv + i, s, false,
1034 if (options[j].takes_argument())
1047 this->usage(_("missing argument"), opt);
1049 this->apply_option(options[j], arg);
1055 if (j >= options_size)
1056 this->usage(_("unknown option"), *s);
1065 Command_line::process(int argc, char** argv)
1067 bool no_more_options = false;
1070 i = process_one_option(argc, argv, i, &no_more_options);
1072 if (this->inputs_.in_group())
1074 fprintf(stderr, _("%s: missing group end\n"), program_name);
1078 // FIXME: We should only do this when configured in native mode.
1079 this->options_.add_to_search_path_with_sysroot("/lib");
1080 this->options_.add_to_search_path_with_sysroot("/usr/lib");
1082 this->options_.add_sysroot();
1084 // Ensure options don't contradict each other and are otherwise kosher.
1085 this->normalize_options();
1088 // Extract an option argument for a special option. LONGNAME is the
1089 // long name of the option. This sets *PRET to the return value for
1090 // the special function handler to skip to the next option.
1093 Command_line::get_special_argument(const char* longname, int argc, char** argv,
1094 const char* arg, bool long_option,
1099 size_t longlen = strlen(longname);
1100 gold_assert(strncmp(arg, longname, longlen) == 0);
1109 gold_assert(*arg == '\0');
1128 this->usage(_("missing argument"), arg);
1131 // Ensure options don't contradict each other and are otherwise kosher.
1134 Command_line::normalize_options()
1136 if (this->options_.shared() && this->options_.relocatable())
1137 gold_fatal(_("-shared and -r are incompatible"));
1139 if (this->options_.oformat_enum() != General_options::OBJECT_FORMAT_ELF
1140 && (this->options_.shared() || this->options_.relocatable()))
1141 gold_fatal(_("binary output format not compatible with -shared or -r"));
1143 // If the user specifies both -s and -r, convert the -s as -S.
1144 // -r requires us to keep externally visible symbols!
1145 if (this->options_.strip_all() && this->options_.relocatable())
1147 // Clears the strip_all() status, replacing it with strip_debug().
1148 this->options_.set_strip_debug(true);
1151 // Set default value for define_common.
1152 if (!this->options_.user_set_define_common())
1153 this->options_.set_define_common(!this->options_.relocatable());
1155 // FIXME: we can/should be doing a lot more sanity checking here.
1159 // Apply a command line option.
1162 Command_line::apply_option(const options::One_option& opt,
1167 if (opt.general_noarg)
1168 (this->options_.*(opt.general_noarg))(true);
1169 else if (opt.dependent_noarg)
1170 (this->position_options_.*(opt.dependent_noarg))(true);
1176 if (opt.general_arg)
1177 (this->options_.*(opt.general_arg))(arg);
1178 else if (opt.dependent_arg)
1179 (this->position_options_.*(opt.dependent_arg))(arg);
1185 // Add an input file or library.
1188 Command_line::add_file(const char* name, bool is_lib)
1190 Input_file_argument file(name, is_lib, "", false, this->position_options_);
1191 this->inputs_.add_file(file);
1194 // Handle the -l option, which requires special treatment.
1197 Command_line::process_l_option(int argc, char** argv, char* arg,
1201 const char* libname = this->get_special_argument("library", argc, argv, arg,
1203 this->add_file(libname, true);
1207 // Handle the --start-group option.
1210 Command_line::start_group(const char* arg)
1212 if (this->inputs_.in_group())
1213 this->usage(_("may not nest groups"), arg);
1214 this->inputs_.start_group();
1217 // Handle the --end-group option.
1220 Command_line::end_group(const char* arg)
1222 if (!this->inputs_.in_group())
1223 this->usage(_("group end without group start"), arg);
1224 this->inputs_.end_group();
1227 // Report a usage error. */
1230 Command_line::usage()
1233 _("%s: use the --help option for usage information\n"),
1235 ::exit(EXIT_FAILURE);
1239 Command_line::usage(const char* msg, const char *opt)
1243 program_name, opt, msg);
1248 Command_line::usage(const char* msg, char opt)
1252 program_name, opt, msg);
1256 } // End namespace gold.