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"
33 #include "target-select.h"
39 // The information we keep for a single command line option.
41 struct options::One_option
43 // The single character option name, or '\0' if this is only a long
47 // The long option name, or NULL if this is only a short option.
48 const char* long_option;
50 // Description of the option for --help output, or NULL if there is none.
53 // How to print the option name in --help output, or NULL to use the
55 const char* help_output;
57 // Long option dash control. This is ignored if long_option is
61 // Long option normally takes one dash; two dashes are also
64 // Long option normally takes two dashes; one dash is also
67 // Long option always takes two dashes.
71 // Function for special handling, or NULL. Returns the number of
72 // arguments to skip. This will normally be at least 1, but it may
73 // be 0 if this function changes *argv. ARG points to the location
74 // in *ARGV where the option starts, which may be helpful for a
76 int (*special)(int argc, char** argv, char *arg, bool long_option,
79 // If this is a position independent option which does not take an
80 // argument, this is the member function to call to record it. (In
81 // this file, the bool will always be 'true' to indicate the option
83 void (General_options::*general_noarg)(bool);
85 // If this is a position independent function which takes an
86 // argument, this is the member function to call to record it.
87 void (General_options::*general_arg)(const char*);
89 // If this is a position dependent option which does not take an
90 // argument, this is the member function to call to record it. (In
91 // this file, the bool will always be 'true' to indicate the option
93 void (Position_dependent_options::*dependent_noarg)(bool);
95 // If this is a position dependent option which takes an argument,
96 // this is the member function to record it.
97 void (Position_dependent_options::*dependent_arg)(const char*);
99 // Return whether this option takes an argument.
101 takes_argument() const
102 { return this->general_arg != NULL || this->dependent_arg != NULL; }
105 // We have a separate table for -z options.
107 struct options::One_z_option
109 // The name of the option.
112 // The member function in General_options called to record an option
113 // which does not take an argument.
114 void (General_options::*set_noarg)(bool);
116 // The member function in General_options called to record an option
117 // which does take an argument.
118 void (General_options::*set_arg)(const char*);
121 // We have a separate table for --debug options.
123 struct options::One_debug_option
125 // The name of the option.
128 // The flags to turn on.
129 unsigned int debug_flags;
132 class options::Command_line_options
135 static const One_option options[];
136 static const int options_size;
137 static const One_z_option z_options[];
138 static const int z_options_size;
139 static const One_debug_option debug_options[];
140 static const int debug_options_size;
143 } // End namespace gold.
148 // Recognize input and output target names. The GNU linker accepts
149 // these with --format and --oformat. This code is intended to be
150 // minimally compatible. In practice for an ELF target this would be
151 // the same target as the input files; that name always start with
152 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
153 // "binary", "ihex". See also
154 // General_options::default_target_settings.
156 gold::General_options::Object_format
157 string_to_object_format(const char* arg)
159 if (strncmp(arg, "elf", 3) == 0)
160 return gold::General_options::OBJECT_FORMAT_ELF;
161 else if (strcmp(arg, "binary") == 0)
162 return gold::General_options::OBJECT_FORMAT_BINARY;
165 gold::gold_error(_("format '%s' not supported "
166 "(supported formats: elf, binary)"),
168 return gold::General_options::OBJECT_FORMAT_ELF;
172 // Handle the special -defsym option, which defines a symbol.
175 add_to_defsym(int argc, char** argv, char* arg, bool long_option,
176 gold::Command_line* cmdline)
179 const char* val = cmdline->get_special_argument("defsym", argc, argv, arg,
181 cmdline->script_options().define_symbol(val);
185 // Handle the special -l option, which adds an input file.
188 library(int argc, char** argv, char* arg, bool long_option,
189 gold::Command_line* cmdline)
191 return cmdline->process_l_option(argc, argv, arg, long_option);
194 // Handle the -R option. Historically the GNU linker made -R a
195 // synonym for --just-symbols. ELF linkers have traditionally made -R
196 // a synonym for -rpath. When ELF support was added to the GNU
197 // linker, -R was changed to switch based on the argument: if the
198 // argument is an ordinary file, we treat it as --just-symbols,
199 // otherwise we treat it as -rpath. We need to be compatible with
200 // this, because existing build scripts rely on it.
203 handle_r_option(int argc, char** argv, char* arg, bool long_option,
204 gold::Command_line* cmdline)
207 const char* val = cmdline->get_special_argument("R", argc, argv, arg,
210 if (::stat(val, &s) != 0 || S_ISDIR(s.st_mode))
211 cmdline->add_to_rpath(val);
213 cmdline->add_just_symbols_file(val);
217 // Handle the --just-symbols option.
220 handle_just_symbols_option(int argc, char** argv, char* arg,
221 bool long_option, gold::Command_line* cmdline)
224 const char* val = cmdline->get_special_argument("just-symbols", argc, argv,
225 arg, long_option, &ret);
226 cmdline->add_just_symbols_file(val);
230 // Handle the special -T/--script option, which reads a linker script.
233 invoke_script(int argc, char** argv, char* arg, bool long_option,
234 gold::Command_line* cmdline)
237 const char* script_name = cmdline->get_special_argument("script", argc, argv,
240 if (!read_commandline_script(script_name, cmdline))
241 gold::gold_fatal(_("unable to parse script file %s"), script_name);
245 // Handle the special --version-script option, which reads a version script.
248 invoke_version_script(int argc, char** argv, char* arg, bool long_option,
249 gold::Command_line* cmdline)
252 const char* script_name = cmdline->get_special_argument("version-script",
256 if (!read_version_script(script_name, cmdline))
257 gold::gold_fatal(_("unable to parse version script file %s"), script_name);
261 // Handle the special --start-group option.
264 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
266 cmdline->start_group(arg);
270 // Handle the special --end-group option.
273 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
275 cmdline->end_group(arg);
279 // Report usage information for ld --help, and exit.
282 help(int, char**, char*, bool, gold::Command_line*)
284 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
286 const int options_size = gold::options::Command_line_options::options_size;
287 const gold::options::One_option* options =
288 gold::options::Command_line_options::options;
289 for (int i = 0; i < options_size; ++i)
291 if (options[i].doc == NULL)
301 if (options[j].help_output != NULL)
308 printf(options[j].help_output);
309 len += std::strlen(options[j].help_output);
314 if (options[j].short_option != '\0')
321 printf("-%c", options[j].short_option);
326 if (options[j].long_option != NULL)
333 if (options[j].dash == gold::options::One_option::ONE_DASH)
343 printf("%s", options[j].long_option);
344 len += std::strlen(options[j].long_option);
350 while (j < options_size && options[j].doc == NULL);
357 for (; len < 30; ++len)
360 std::puts(options[i].doc);
363 ::exit(EXIT_SUCCESS);
368 // Report version information.
371 version(int, char**, char* opt, bool, gold::Command_line*)
373 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
374 ::exit(EXIT_SUCCESS);
378 // If the default sysroot is relocatable, try relocating it based on
382 get_relative_sysroot(const char* from)
384 char* path = make_relative_prefix(gold::program_name, from,
389 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
397 // Return the default sysroot. This is set by the --with-sysroot
398 // option to configure.
401 get_default_sysroot()
403 const char* sysroot = TARGET_SYSTEM_ROOT;
404 if (*sysroot == '\0')
407 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
409 char* path = get_relative_sysroot (BINDIR);
411 path = get_relative_sysroot (TOOLBINDIR);
414 std::string ret = path;
423 } // End anonymous namespace.
428 // Helper macros used to specify the options. We could also do this
429 // using constructors, but then g++ would generate code to initialize
430 // the array. We want the array to be initialized statically so that
431 // we get better startup time.
433 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
434 { short_option, long_option, doc, help, options::One_option::dash, \
435 NULL, func, NULL, NULL, NULL }
436 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
437 { short_option, long_option, doc, help, options::One_option::dash, \
438 NULL, NULL, func, NULL, NULL }
439 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
440 { short_option, long_option, doc, help, options::One_option::dash, \
441 NULL, NULL, NULL, func, NULL }
442 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
443 { short_option, long_option, doc, help, options::One_option::dash, \
444 NULL, NULL, NULL, NULL, func }
445 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
446 { short_option, long_option, doc, help, options::One_option::dash, \
447 func, NULL, NULL, NULL, NULL }
449 // Here is the actual list of options which we accept.
451 const options::One_option
452 options::Command_line_options::options[] =
454 GENERAL_NOARG('\0', "allow-shlib-undefined",
455 N_("Allow unresolved references in shared libraries"),
457 &General_options::set_allow_shlib_undefined),
458 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
459 N_("Do not allow unresolved references in shared libraries"),
461 &General_options::set_no_allow_shlib_undefined),
462 POSDEP_NOARG('\0', "as-needed",
463 N_("Only set DT_NEEDED for dynamic libs if used"),
464 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
465 POSDEP_NOARG('\0', "no-as-needed",
466 N_("Always DT_NEEDED for dynamic libs (default)"),
467 NULL, TWO_DASHES, &Position_dependent_options::set_no_as_needed),
468 POSDEP_NOARG('\0', "Bdynamic",
469 N_("-l searches for shared libraries"),
471 &Position_dependent_options::set_Bdynamic),
472 POSDEP_NOARG('\0', "Bstatic",
473 N_("-l does not search for shared libraries"),
475 &Position_dependent_options::set_Bstatic),
476 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
477 NULL, ONE_DASH, &General_options::set_Bsymbolic),
478 POSDEP_ARG('b', "format", N_("Set input format (elf, binary)"),
479 N_("-b FORMAT, --format FORMAT"), TWO_DASHES,
480 &Position_dependent_options::set_format),
482 # define ZLIB_STR ",zlib"
486 GENERAL_ARG('\0', "compress-debug-sections",
487 N_("Compress .debug_* sections in the output file "
488 "(default is none)"),
489 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
491 &General_options::set_compress_debug_sections),
492 SPECIAL('\0', "defsym", N_("Define a symbol"),
493 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES,
495 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
496 NULL, TWO_DASHES, &General_options::set_demangle),
497 GENERAL_NOARG('\0', "no-demangle",
498 N_("Do not demangle C++ symbols in log messages"),
499 NULL, TWO_DASHES, &General_options::set_no_demangle),
500 GENERAL_NOARG('\0', "detect-odr-violations",
501 N_("Try to detect violations of the One Definition Rule"),
502 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
503 GENERAL_ARG('e', "entry", N_("Set program start address"),
504 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
505 &General_options::set_entry),
506 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
507 NULL, TWO_DASHES, &General_options::set_export_dynamic),
508 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
509 NULL, TWO_DASHES, &General_options::set_eh_frame_hdr),
510 GENERAL_ARG('h', "soname", N_("Set shared library name"),
511 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
512 &General_options::set_soname),
513 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
514 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
515 &General_options::set_dynamic_linker),
516 SPECIAL('l', "library", N_("Search for library LIBNAME"),
517 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
519 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
520 N_("-L DIR, --library-path DIR"), TWO_DASHES,
521 &General_options::add_to_search_path),
522 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
523 &General_options::ignore),
524 GENERAL_ARG('o', "output", N_("Set output file name"),
525 N_("-o FILE, --output FILE"), TWO_DASHES,
526 &General_options::set_output),
527 GENERAL_ARG('O', "optimize", N_("Optimize output file size"),
528 N_("-O level"), ONE_DASH,
529 &General_options::set_optimize),
530 GENERAL_ARG('\0', "oformat", N_("Set output format (only binary supported)"),
531 N_("--oformat FORMAT"), EXACTLY_TWO_DASHES,
532 &General_options::set_oformat),
533 GENERAL_NOARG('r', "relocatable", N_("Generate relocatable output"), NULL,
534 ONE_DASH, &General_options::set_relocatable),
535 // -R really means -rpath, but can mean --just-symbols for
536 // compatibility with GNU ld. -rpath is always -rpath, so we list
538 SPECIAL('R', NULL, N_("Add DIR to runtime search path"),
539 N_("-R DIR"), ONE_DASH, &handle_r_option),
540 GENERAL_ARG('\0', "rpath", NULL, N_("-rpath DIR"), ONE_DASH,
541 &General_options::add_to_rpath),
542 SPECIAL('\0', "just-symbols", N_("Read only symbol values from file"),
543 N_("-R FILE, --just-symbols FILE"), TWO_DASHES,
544 &handle_just_symbols_option),
545 GENERAL_ARG('\0', "rpath-link",
546 N_("Add DIR to link time shared library search path"),
547 N_("--rpath-link DIR"), TWO_DASHES,
548 &General_options::add_to_rpath_link),
549 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
550 TWO_DASHES, &General_options::set_strip_all),
551 GENERAL_NOARG('\0', "strip-debug-gdb",
552 N_("Strip debug symbols that are unused by gdb "
553 "(at least versions <= 6.7)"),
554 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
555 // This must come after -Sdebug since it's a prefix of it.
556 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
557 TWO_DASHES, &General_options::set_strip_debug),
558 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
559 NULL, ONE_DASH, &General_options::set_shared),
560 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
561 NULL, ONE_DASH, &General_options::set_static),
562 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
563 NULL, TWO_DASHES, &General_options::set_stats),
564 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
565 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
566 GENERAL_ARG('\0', "Tbss", N_("Set the address of the bss segment"),
567 N_("-Tbss ADDRESS"), ONE_DASH,
568 &General_options::set_Tbss),
569 GENERAL_ARG('\0', "Tdata", N_("Set the address of the data segment"),
570 N_("-Tdata ADDRESS"), ONE_DASH,
571 &General_options::set_Tdata),
572 GENERAL_ARG('\0', "Ttext", N_("Set the address of the text segment"),
573 N_("-Ttext ADDRESS"), ONE_DASH,
574 &General_options::set_Ttext),
575 // This must come after -Ttext and friends since it's a prefix of
577 SPECIAL('T', "script", N_("Read linker script"),
578 N_("-T FILE, --script FILE"), TWO_DASHES,
580 SPECIAL('\0', "version-script", N_("Read version script"),
581 N_("--version-script FILE"), TWO_DASHES,
582 &invoke_version_script),
583 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
584 NULL, TWO_DASHES, &General_options::set_threads),
585 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
586 NULL, TWO_DASHES, &General_options::set_no_threads),
587 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
588 N_("--thread-count COUNT"), TWO_DASHES,
589 &General_options::set_thread_count),
590 GENERAL_ARG('\0', "thread-count-initial",
591 N_("Number of threads to use in initial pass"),
592 N_("--thread-count-initial COUNT"), TWO_DASHES,
593 &General_options::set_thread_count_initial),
594 GENERAL_ARG('\0', "thread-count-middle",
595 N_("Number of threads to use in middle pass"),
596 N_("--thread-count-middle COUNT"), TWO_DASHES,
597 &General_options::set_thread_count_middle),
598 GENERAL_ARG('\0', "thread-count-final",
599 N_("Number of threads to use in final pass"),
600 N_("--thread-count-final COUNT"), TWO_DASHES,
601 &General_options::set_thread_count_final),
602 POSDEP_NOARG('\0', "whole-archive",
603 N_("Include all archive contents"),
605 &Position_dependent_options::set_whole_archive),
606 POSDEP_NOARG('\0', "no-whole-archive",
607 N_("Include only needed archive contents"),
609 &Position_dependent_options::set_no_whole_archive),
611 GENERAL_ARG('z', NULL,
612 N_("Subcommands as follows:\n\
613 -z execstack Mark output as requiring executable stack\n\
614 -z noexecstack Mark output as not requiring executable stack\n\
615 -z max-page-size=SIZE Set maximum page size to SIZE\n\
616 -z common-page-size=SIZE Set common page size to SIZE"),
617 N_("-z SUBCOMMAND"), ONE_DASH,
618 &General_options::handle_z_option),
620 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
621 TWO_DASHES, &start_group),
622 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
623 TWO_DASHES, &end_group),
624 SPECIAL('\0', "help", N_("Report usage information"), NULL,
626 SPECIAL('v', "version", N_("Report version information"), NULL,
627 TWO_DASHES, &version),
628 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task,script)"),
629 N_("--debug=TYPE"), TWO_DASHES,
630 &General_options::handle_debug_option)
633 const int options::Command_line_options::options_size =
634 sizeof (options) / sizeof (options[0]);
638 const options::One_z_option
639 options::Command_line_options::z_options[] =
641 { "execstack", &General_options::set_execstack, NULL },
642 { "noexecstack", &General_options::set_noexecstack, NULL },
643 { "max-page-size", NULL, &General_options::set_max_page_size },
644 { "common-page-size", NULL, &General_options::set_common_page_size }
647 const int options::Command_line_options::z_options_size =
648 sizeof(z_options) / sizeof(z_options[0]);
650 // The --debug options.
652 const options::One_debug_option
653 options::Command_line_options::debug_options[] =
655 { "all", DEBUG_ALL },
656 { "task", DEBUG_TASK },
657 { "script", DEBUG_SCRIPT }
660 const int options::Command_line_options::debug_options_size =
661 sizeof(debug_options) / sizeof(debug_options[0]);
663 // The default values for the general options.
665 General_options::General_options()
667 export_dynamic_(false),
669 dynamic_linker_(NULL),
671 optimization_level_(0),
672 output_file_name_("a.out"),
673 oformat_(OBJECT_FORMAT_ELF),
674 oformat_string_(NULL),
675 is_relocatable_(false),
677 allow_shlib_undefined_(false),
679 compress_debug_sections_(NO_COMPRESSION),
680 detect_odr_violations_(false),
681 create_eh_frame_hdr_(false),
688 bss_segment_address_(-1U), // -1 indicates value not set by user
689 data_segment_address_(-1U),
690 text_segment_address_(-1U),
692 thread_count_initial_(0),
693 thread_count_middle_(0),
694 thread_count_final_(0),
695 execstack_(EXECSTACK_FROM_INPUT),
697 common_page_size_(0),
700 // We initialize demangle_ based on the environment variable
701 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
702 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
703 // environment. Acting the same way here lets us provide the same
704 // interface by default.
705 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
708 // Handle the --oformat option.
711 General_options::set_oformat(const char* arg)
713 this->oformat_string_ = arg;
714 this->oformat_ = string_to_object_format(arg);
717 // The x86_64 kernel build converts a binary file to an object file
718 // using -r --format binary --oformat elf32-i386 foo.o. In order to
719 // support that for gold we support determining the default target
720 // choice from the output format. We recognize names that the GNU
724 General_options::default_target() const
726 if (this->oformat_string_ != NULL)
728 Target* target = select_target_by_name(this->oformat_string_);
732 gold_error(_("unrecognized output format %s"),
733 this->oformat_string_);
736 // The GOLD_DEFAULT_xx macros are defined by the configure script.
737 Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE,
739 GOLD_DEFAULT_BIG_ENDIAN,
741 gold_assert(target != NULL);
745 // Handle the -z option.
748 General_options::handle_z_option(const char* arg)
750 // ARG may be a word, like "noexec", or it may be an option in its
751 // own right, like "max-page-size=SIZE".
752 const char* argarg = strchr(arg, '='); // the argument to the -z argument
756 arglen = argarg - arg;
760 arglen = strlen(arg);
762 const int z_options_size = options::Command_line_options::z_options_size;
763 const gold::options::One_z_option* z_options =
764 gold::options::Command_line_options::z_options;
765 for (int i = 0; i < z_options_size; ++i)
767 if (memcmp(arg, z_options[i].name, arglen) == 0
768 && z_options[i].name[arglen] == '\0')
770 if (z_options[i].set_noarg && argarg)
771 gold::gold_fatal(_("-z subcommand does not take an argument: %s\n"),
773 else if (z_options[i].set_arg && !argarg)
774 gold::gold_fatal(_("-z subcommand requires an argument: %s\n"),
776 else if (z_options[i].set_arg)
777 (this->*(z_options[i].set_arg))(argarg);
779 (this->*(z_options[i].set_noarg))(true);
784 gold::gold_fatal(_("%s: unrecognized -z subcommand: %s\n"),
788 // Handle the --debug option.
791 General_options::handle_debug_option(const char* arg)
793 const int debug_options_size =
794 options::Command_line_options::debug_options_size;
795 const gold::options::One_debug_option* debug_options =
796 options::Command_line_options::debug_options;
797 for (int i = 0; i < debug_options_size; ++i)
799 if (strcmp(arg, debug_options[i].name) == 0)
801 this->set_debug(debug_options[i].debug_flags);
806 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
808 ::exit(EXIT_FAILURE);
811 // Add the sysroot, if any, to the search paths.
814 General_options::add_sysroot()
816 if (this->sysroot_.empty())
818 this->sysroot_ = get_default_sysroot();
819 if (this->sysroot_.empty())
823 const char* sysroot = this->sysroot_.c_str();
824 char* canonical_sysroot = lrealpath(sysroot);
826 for (Dir_list::iterator p = this->search_path_.begin();
827 p != this->search_path_.end();
829 p->add_sysroot(sysroot, canonical_sysroot);
831 free(canonical_sysroot);
834 // The default values for the position dependent options.
836 Position_dependent_options::Position_dependent_options()
837 : do_static_search_(false),
839 include_whole_archive_(false),
840 input_format_(General_options::OBJECT_FORMAT_ELF)
844 // Set the input format.
847 Position_dependent_options::set_format(const char* arg)
849 this->input_format_ = string_to_object_format(arg);
852 // Search_directory methods.
854 // This is called if we have a sysroot. Apply the sysroot if
855 // appropriate. Record whether the directory is in the sysroot.
858 Search_directory::add_sysroot(const char* sysroot,
859 const char* canonical_sysroot)
861 gold_assert(*sysroot != '\0');
862 if (this->put_in_sysroot_)
864 if (!IS_DIR_SEPARATOR(this->name_[0])
865 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
866 this->name_ = '/' + this->name_;
867 this->name_ = sysroot + this->name_;
868 this->is_in_sysroot_ = true;
872 // Check whether this entry is in the sysroot. To do this
873 // correctly, we need to use canonical names. Otherwise we will
874 // get confused by the ../../.. paths that gcc tends to use.
875 char* canonical_name = lrealpath(this->name_.c_str());
876 int canonical_name_len = strlen(canonical_name);
877 int canonical_sysroot_len = strlen(canonical_sysroot);
878 if (canonical_name_len > canonical_sysroot_len
879 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
881 canonical_name[canonical_sysroot_len] = '\0';
882 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
883 this->is_in_sysroot_ = true;
885 free(canonical_name);
889 // Input_arguments methods.
891 // Add a file to the list.
894 Input_arguments::add_file(const Input_file_argument& file)
896 if (!this->in_group_)
897 this->input_argument_list_.push_back(Input_argument(file));
900 gold_assert(!this->input_argument_list_.empty());
901 gold_assert(this->input_argument_list_.back().is_group());
902 this->input_argument_list_.back().group()->add_file(file);
909 Input_arguments::start_group()
911 gold_assert(!this->in_group_);
912 Input_file_group* group = new Input_file_group();
913 this->input_argument_list_.push_back(Input_argument(group));
914 this->in_group_ = true;
920 Input_arguments::end_group()
922 gold_assert(this->in_group_);
923 this->in_group_ = false;
926 // Command_line options.
928 Command_line::Command_line()
929 : options_(), position_options_(), script_options_(), inputs_()
933 // Process the command line options. For process_one_option,
934 // i is the index of argv to process next, and the return value
935 // is the index of the next option to process (i+1 or i+2, or argc
936 // to indicate processing is done). no_more_options is set to true
937 // if (and when) "--" is seen as an option.
940 Command_line::process_one_option(int argc, char** argv, int i,
941 bool* no_more_options)
943 const int options_size = options::Command_line_options::options_size;
944 const options::One_option* options = options::Command_line_options::options;
945 gold_assert(i < argc);
947 if (argv[i][0] != '-' || *no_more_options)
949 this->add_file(argv[i], false);
953 // Option starting with '-'.
955 if (argv[i][1] == '-')
958 if (argv[i][2] == '\0')
960 *no_more_options = true;
965 // Look for a long option match.
966 char* opt = argv[i] + dashes;
969 char* arg = strchr(opt, '=');
970 bool argument_with_equals = arg != NULL;
976 else if (i + 1 < argc)
983 for (j = 0; j < options_size; ++j)
985 if (options[j].long_option != NULL
988 != options::One_option::EXACTLY_TWO_DASHES))
989 && first == options[j].long_option[0]
990 && strcmp(opt, options[j].long_option) == 0)
992 if (options[j].special)
994 // Restore the '=' we clobbered above.
995 if (arg != NULL && skiparg == 0)
997 i += options[j].special(argc - i, argv + i, opt, true, this);
1001 if (!options[j].takes_argument())
1003 if (argument_with_equals)
1004 this->usage(_("unexpected argument"), argv[i]);
1011 this->usage(_("missing argument"), argv[i]);
1013 this->apply_option(options[j], arg);
1019 if (j < options_size)
1022 // If we saw two dashes, we needed to have seen a long option.
1024 this->usage(_("unknown option"), argv[i]);
1026 // Look for a short option match. There may be more than one
1027 // short option in a given argument.
1029 char* s = argv[i] + 1;
1031 while (*s != '\0' && !done)
1035 for (j = 0; j < options_size; ++j)
1037 if (options[j].short_option == opt)
1039 if (options[j].special)
1041 // Undo the argument skip done above.
1043 i += options[j].special(argc - i, argv + i, s, false,
1050 if (options[j].takes_argument())
1063 this->usage(_("missing argument"), opt);
1065 this->apply_option(options[j], arg);
1071 if (j >= options_size)
1072 this->usage(_("unknown option"), *s);
1081 Command_line::process(int argc, char** argv)
1083 bool no_more_options = false;
1086 i = process_one_option(argc, argv, i, &no_more_options);
1088 if (this->inputs_.in_group())
1090 fprintf(stderr, _("%s: missing group end\n"), program_name);
1094 // FIXME: We should only do this when configured in native mode.
1095 this->options_.add_to_search_path_with_sysroot("/lib");
1096 this->options_.add_to_search_path_with_sysroot("/usr/lib");
1098 this->options_.add_sysroot();
1100 // Ensure options don't contradict each other and are otherwise kosher.
1101 this->normalize_options();
1104 // Extract an option argument for a special option. LONGNAME is the
1105 // long name of the option. This sets *PRET to the return value for
1106 // the special function handler to skip to the next option.
1109 Command_line::get_special_argument(const char* longname, int argc, char** argv,
1110 const char* arg, bool long_option,
1115 size_t longlen = strlen(longname);
1116 gold_assert(strncmp(arg, longname, longlen) == 0);
1125 gold_assert(*arg == '\0');
1144 this->usage(_("missing argument"), arg);
1147 // Ensure options don't contradict each other and are otherwise kosher.
1150 Command_line::normalize_options()
1152 if (this->options_.shared() && this->options_.relocatable())
1153 gold_fatal(_("-shared and -r are incompatible"));
1155 if (this->options_.oformat() != General_options::OBJECT_FORMAT_ELF
1156 && (this->options_.shared() || this->options_.relocatable()))
1157 gold_fatal(_("binary output format not compatible with -shared or -r"));
1159 // If the user specifies both -s and -r, convert the -s as -S.
1160 // -r requires us to keep externally visible symbols!
1161 if (this->options_.strip_all() && this->options_.relocatable())
1163 // Clears the strip_all() status, replacing it with strip_debug().
1164 this->options_.set_strip_debug(true);
1167 // FIXME: we can/should be doing a lot more sanity checking here.
1171 // Apply a command line option.
1174 Command_line::apply_option(const options::One_option& opt,
1179 if (opt.general_noarg)
1180 (this->options_.*(opt.general_noarg))(true);
1181 else if (opt.dependent_noarg)
1182 (this->position_options_.*(opt.dependent_noarg))(true);
1188 if (opt.general_arg)
1189 (this->options_.*(opt.general_arg))(arg);
1190 else if (opt.dependent_arg)
1191 (this->position_options_.*(opt.dependent_arg))(arg);
1197 // Add an input file or library.
1200 Command_line::add_file(const char* name, bool is_lib)
1202 Input_file_argument file(name, is_lib, "", false, this->position_options_);
1203 this->inputs_.add_file(file);
1206 // Handle the -l option, which requires special treatment.
1209 Command_line::process_l_option(int argc, char** argv, char* arg,
1213 const char* libname = this->get_special_argument("library", argc, argv, arg,
1215 this->add_file(libname, true);
1219 // Handle the --start-group option.
1222 Command_line::start_group(const char* arg)
1224 if (this->inputs_.in_group())
1225 this->usage(_("may not nest groups"), arg);
1226 this->inputs_.start_group();
1229 // Handle the --end-group option.
1232 Command_line::end_group(const char* arg)
1234 if (!this->inputs_.in_group())
1235 this->usage(_("group end without group start"), arg);
1236 this->inputs_.end_group();
1239 // Report a usage error. */
1242 Command_line::usage()
1245 _("%s: use the --help option for usage information\n"),
1247 ::exit(EXIT_FAILURE);
1251 Command_line::usage(const char* msg, const char *opt)
1255 program_name, opt, msg);
1260 Command_line::usage(const char* msg, char opt)
1264 program_name, opt, msg);
1268 } // End namespace gold.