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 -l option, which adds an input file.
175 library(int argc, char** argv, char* arg, bool long_option,
176 gold::Command_line* cmdline)
178 return cmdline->process_l_option(argc, argv, arg, long_option);
181 // Handle the -R option. Historically the GNU linker made -R a
182 // synonym for --just-symbols. ELF linkers have traditionally made -R
183 // a synonym for -rpath. When ELF support was added to the GNU
184 // linker, -R was changed to switch based on the argument: if the
185 // argument is an ordinary file, we treat it as --just-symbols,
186 // otherwise we treat it as -rpath. We need to be compatible with
187 // this, because existing build scripts rely on it.
190 handle_r_option(int argc, char** argv, char* arg, bool long_option,
191 gold::Command_line* cmdline)
194 const char* val = cmdline->get_special_argument("R", argc, argv, arg,
197 if (::stat(val, &s) != 0 || S_ISDIR(s.st_mode))
198 cmdline->add_to_rpath(val);
200 cmdline->add_just_symbols_file(val);
204 // Handle the --just-symbols option.
207 handle_just_symbols_option(int argc, char** argv, char* arg,
208 bool long_option, gold::Command_line* cmdline)
211 const char* val = cmdline->get_special_argument("just-symbols", argc, argv,
212 arg, long_option, &ret);
213 cmdline->add_just_symbols_file(val);
217 // Handle the special -T/--script option, which reads a linker script.
220 invoke_script(int argc, char** argv, char* arg, bool long_option,
221 gold::Command_line* cmdline)
224 const char* script_name = cmdline->get_special_argument("script", argc, argv,
227 if (!read_commandline_script(script_name, cmdline))
228 gold::gold_fatal(_("unable to parse script file %s"), script_name);
232 // Handle the special --version-script option, which reads a version script.
235 invoke_version_script(int argc, char** argv, char* arg, bool long_option,
236 gold::Command_line* cmdline)
239 const char* script_name = cmdline->get_special_argument("version-script",
243 if (!read_version_script(script_name, cmdline))
244 gold::gold_fatal(_("unable to parse version script file %s"), script_name);
248 // Handle the special --start-group option.
251 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
253 cmdline->start_group(arg);
257 // Handle the special --end-group option.
260 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
262 cmdline->end_group(arg);
266 // Report usage information for ld --help, and exit.
269 help(int, char**, char*, bool, gold::Command_line*)
271 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
273 const int options_size = gold::options::Command_line_options::options_size;
274 const gold::options::One_option* options =
275 gold::options::Command_line_options::options;
276 for (int i = 0; i < options_size; ++i)
278 if (options[i].doc == NULL)
288 if (options[j].help_output != NULL)
295 printf(options[j].help_output);
296 len += std::strlen(options[j].help_output);
301 if (options[j].short_option != '\0')
308 printf("-%c", options[j].short_option);
313 if (options[j].long_option != NULL)
320 if (options[j].dash == gold::options::One_option::ONE_DASH)
330 printf("%s", options[j].long_option);
331 len += std::strlen(options[j].long_option);
337 while (j < options_size && options[j].doc == NULL);
344 for (; len < 30; ++len)
347 std::puts(options[i].doc);
350 ::exit(EXIT_SUCCESS);
355 // Report version information.
358 version(int, char**, char* opt, bool, gold::Command_line*)
360 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
361 ::exit(EXIT_SUCCESS);
365 // If the default sysroot is relocatable, try relocating it based on
369 get_relative_sysroot(const char* from)
371 char* path = make_relative_prefix(gold::program_name, from,
376 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
384 // Return the default sysroot. This is set by the --with-sysroot
385 // option to configure.
388 get_default_sysroot()
390 const char* sysroot = TARGET_SYSTEM_ROOT;
391 if (*sysroot == '\0')
394 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
396 char* path = get_relative_sysroot (BINDIR);
398 path = get_relative_sysroot (TOOLBINDIR);
401 std::string ret = path;
410 } // End anonymous namespace.
415 // Helper macros used to specify the options. We could also do this
416 // using constructors, but then g++ would generate code to initialize
417 // the array. We want the array to be initialized statically so that
418 // we get better startup time.
420 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
421 { short_option, long_option, doc, help, options::One_option::dash, \
422 NULL, func, NULL, NULL, NULL }
423 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
424 { short_option, long_option, doc, help, options::One_option::dash, \
425 NULL, NULL, func, NULL, NULL }
426 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
427 { short_option, long_option, doc, help, options::One_option::dash, \
428 NULL, NULL, NULL, func, NULL }
429 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
430 { short_option, long_option, doc, help, options::One_option::dash, \
431 NULL, NULL, NULL, NULL, func }
432 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
433 { short_option, long_option, doc, help, options::One_option::dash, \
434 func, NULL, NULL, NULL, NULL }
436 // Here is the actual list of options which we accept.
438 const options::One_option
439 options::Command_line_options::options[] =
441 GENERAL_NOARG('\0', "allow-shlib-undefined",
442 N_("Allow unresolved references in shared libraries"),
444 &General_options::set_allow_shlib_undefined),
445 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
446 N_("Do not allow unresolved references in shared libraries"),
448 &General_options::set_no_allow_shlib_undefined),
449 POSDEP_NOARG('\0', "as-needed",
450 N_("Only set DT_NEEDED for dynamic libs if used"),
451 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
452 POSDEP_NOARG('\0', "no-as-needed",
453 N_("Always DT_NEEDED for dynamic libs (default)"),
454 NULL, TWO_DASHES, &Position_dependent_options::set_no_as_needed),
455 POSDEP_NOARG('\0', "Bdynamic",
456 N_("-l searches for shared libraries"),
458 &Position_dependent_options::set_Bdynamic),
459 POSDEP_NOARG('\0', "Bstatic",
460 N_("-l does not search for shared libraries"),
462 &Position_dependent_options::set_Bstatic),
463 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
464 NULL, ONE_DASH, &General_options::set_Bsymbolic),
465 POSDEP_ARG('b', "format", N_("Set input format (elf, binary)"),
466 N_("-b FORMAT, --format FORMAT"), TWO_DASHES,
467 &Position_dependent_options::set_format),
469 # define ZLIB_STR ",zlib"
473 GENERAL_ARG('\0', "compress-debug-sections",
474 N_("Compress .debug_* sections in the output file "
475 "(default is none)"),
476 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
478 &General_options::set_compress_debug_sections),
479 GENERAL_ARG('\0', "defsym", N_("Define a symbol"),
480 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES,
481 &General_options::add_to_defsym),
482 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
483 NULL, TWO_DASHES, &General_options::set_demangle),
484 GENERAL_NOARG('\0', "no-demangle",
485 N_("Do not demangle C++ symbols in log messages"),
486 NULL, TWO_DASHES, &General_options::set_no_demangle),
487 GENERAL_NOARG('\0', "detect-odr-violations",
488 N_("Try to detect violations of the One Definition Rule"),
489 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
490 GENERAL_ARG('e', "entry", N_("Set program start address"),
491 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
492 &General_options::set_entry),
493 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
494 NULL, TWO_DASHES, &General_options::set_export_dynamic),
495 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
496 NULL, TWO_DASHES, &General_options::set_eh_frame_hdr),
497 GENERAL_ARG('h', "soname", N_("Set shared library name"),
498 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
499 &General_options::set_soname),
500 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
501 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
502 &General_options::set_dynamic_linker),
503 SPECIAL('l', "library", N_("Search for library LIBNAME"),
504 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
506 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
507 N_("-L DIR, --library-path DIR"), TWO_DASHES,
508 &General_options::add_to_search_path),
509 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
510 &General_options::ignore),
511 GENERAL_ARG('o', "output", N_("Set output file name"),
512 N_("-o FILE, --output FILE"), TWO_DASHES,
513 &General_options::set_output),
514 GENERAL_ARG('O', "optimize", N_("Optimize output file size"),
515 N_("-O level"), ONE_DASH,
516 &General_options::set_optimize),
517 GENERAL_ARG('\0', "oformat", N_("Set output format (only binary supported)"),
518 N_("--oformat FORMAT"), EXACTLY_TWO_DASHES,
519 &General_options::set_oformat),
520 GENERAL_NOARG('r', "relocatable", N_("Generate relocatable output"), NULL,
521 ONE_DASH, &General_options::set_relocatable),
522 // -R really means -rpath, but can mean --just-symbols for
523 // compatibility with GNU ld. -rpath is always -rpath, so we list
525 SPECIAL('R', NULL, N_("Add DIR to runtime search path"),
526 N_("-R DIR"), ONE_DASH, &handle_r_option),
527 GENERAL_ARG('\0', "rpath", NULL, N_("-rpath DIR"), ONE_DASH,
528 &General_options::add_to_rpath),
529 SPECIAL('\0', "just-symbols", N_("Read only symbol values from file"),
530 N_("-R FILE, --just-symbols FILE"), TWO_DASHES,
531 &handle_just_symbols_option),
532 GENERAL_ARG('\0', "rpath-link",
533 N_("Add DIR to link time shared library search path"),
534 N_("--rpath-link DIR"), TWO_DASHES,
535 &General_options::add_to_rpath_link),
536 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
537 TWO_DASHES, &General_options::set_strip_all),
538 GENERAL_NOARG('\0', "strip-debug-gdb",
539 N_("Strip debug symbols that are unused by gdb "
540 "(at least versions <= 6.7)"),
541 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
542 // This must come after -Sdebug since it's a prefix of it.
543 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
544 TWO_DASHES, &General_options::set_strip_debug),
545 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
546 NULL, ONE_DASH, &General_options::set_shared),
547 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
548 NULL, ONE_DASH, &General_options::set_static),
549 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
550 NULL, TWO_DASHES, &General_options::set_stats),
551 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
552 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
553 GENERAL_ARG('\0', "Tbss", N_("Set the address of the bss segment"),
554 N_("-Tbss ADDRESS"), ONE_DASH,
555 &General_options::set_Tbss),
556 GENERAL_ARG('\0', "Tdata", N_("Set the address of the data segment"),
557 N_("-Tdata ADDRESS"), ONE_DASH,
558 &General_options::set_Tdata),
559 GENERAL_ARG('\0', "Ttext", N_("Set the address of the text segment"),
560 N_("-Ttext ADDRESS"), ONE_DASH,
561 &General_options::set_Ttext),
562 // This must come after -Ttext and friends since it's a prefix of
564 SPECIAL('T', "script", N_("Read linker script"),
565 N_("-T FILE, --script FILE"), TWO_DASHES,
567 SPECIAL('\0', "version-script", N_("Read version script"),
568 N_("--version-script FILE"), TWO_DASHES,
569 &invoke_version_script),
570 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
571 NULL, TWO_DASHES, &General_options::set_threads),
572 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
573 NULL, TWO_DASHES, &General_options::set_no_threads),
574 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
575 N_("--thread-count COUNT"), TWO_DASHES,
576 &General_options::set_thread_count),
577 GENERAL_ARG('\0', "thread-count-initial",
578 N_("Number of threads to use in initial pass"),
579 N_("--thread-count-initial COUNT"), TWO_DASHES,
580 &General_options::set_thread_count_initial),
581 GENERAL_ARG('\0', "thread-count-middle",
582 N_("Number of threads to use in middle pass"),
583 N_("--thread-count-middle COUNT"), TWO_DASHES,
584 &General_options::set_thread_count_middle),
585 GENERAL_ARG('\0', "thread-count-final",
586 N_("Number of threads to use in final pass"),
587 N_("--thread-count-final COUNT"), TWO_DASHES,
588 &General_options::set_thread_count_final),
589 POSDEP_NOARG('\0', "whole-archive",
590 N_("Include all archive contents"),
592 &Position_dependent_options::set_whole_archive),
593 POSDEP_NOARG('\0', "no-whole-archive",
594 N_("Include only needed archive contents"),
596 &Position_dependent_options::set_no_whole_archive),
598 GENERAL_ARG('z', NULL,
599 N_("Subcommands as follows:\n\
600 -z execstack Mark output as requiring executable stack\n\
601 -z noexecstack Mark output as not requiring executable stack\n\
602 -z max-page-size=SIZE Set maximum page size to SIZE\n\
603 -z common-page-size=SIZE Set common page size to SIZE"),
604 N_("-z SUBCOMMAND"), ONE_DASH,
605 &General_options::handle_z_option),
607 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
608 TWO_DASHES, &start_group),
609 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
610 TWO_DASHES, &end_group),
611 SPECIAL('\0', "help", N_("Report usage information"), NULL,
613 SPECIAL('v', "version", N_("Report version information"), NULL,
614 TWO_DASHES, &version),
615 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task,script)"),
616 N_("--debug=TYPE"), TWO_DASHES,
617 &General_options::handle_debug_option)
620 const int options::Command_line_options::options_size =
621 sizeof (options) / sizeof (options[0]);
625 const options::One_z_option
626 options::Command_line_options::z_options[] =
628 { "execstack", &General_options::set_execstack, NULL },
629 { "noexecstack", &General_options::set_noexecstack, NULL },
630 { "max-page-size", NULL, &General_options::set_max_page_size },
631 { "common-page-size", NULL, &General_options::set_common_page_size }
634 const int options::Command_line_options::z_options_size =
635 sizeof(z_options) / sizeof(z_options[0]);
637 // The --debug options.
639 const options::One_debug_option
640 options::Command_line_options::debug_options[] =
642 { "all", DEBUG_ALL },
643 { "task", DEBUG_TASK },
644 { "script", DEBUG_SCRIPT }
647 const int options::Command_line_options::debug_options_size =
648 sizeof(debug_options) / sizeof(debug_options[0]);
650 // The default values for the general options.
652 General_options::General_options(Script_options* script_options)
653 : export_dynamic_(false),
655 dynamic_linker_(NULL),
657 optimization_level_(0),
658 output_file_name_("a.out"),
659 oformat_(OBJECT_FORMAT_ELF),
660 oformat_string_(NULL),
661 is_relocatable_(false),
663 allow_shlib_undefined_(false),
665 compress_debug_sections_(NO_COMPRESSION),
666 detect_odr_violations_(false),
667 create_eh_frame_hdr_(false),
674 bss_segment_address_(-1U), // -1 indicates value not set by user
675 data_segment_address_(-1U),
676 text_segment_address_(-1U),
678 thread_count_initial_(0),
679 thread_count_middle_(0),
680 thread_count_final_(0),
681 execstack_(EXECSTACK_FROM_INPUT),
683 common_page_size_(0),
685 script_options_(script_options)
687 // We initialize demangle_ based on the environment variable
688 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
689 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
690 // environment. Acting the same way here lets us provide the same
691 // interface by default.
692 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
695 // Handle the --defsym option.
698 General_options::add_to_defsym(const char* arg)
700 this->script_options_->define_symbol(arg);
703 // Handle the --oformat option.
706 General_options::set_oformat(const char* arg)
708 this->oformat_string_ = arg;
709 this->oformat_ = string_to_object_format(arg);
712 // The x86_64 kernel build converts a binary file to an object file
713 // using -r --format binary --oformat elf32-i386 foo.o. In order to
714 // support that for gold we support determining the default target
715 // choice from the output format. We recognize names that the GNU
719 General_options::default_target() const
721 if (this->oformat_string_ != NULL)
723 Target* target = select_target_by_name(this->oformat_string_);
727 gold_error(_("unrecognized output format %s"),
728 this->oformat_string_);
731 // The GOLD_DEFAULT_xx macros are defined by the configure script.
732 Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE,
734 GOLD_DEFAULT_BIG_ENDIAN,
736 gold_assert(target != NULL);
740 // Handle the -z option.
743 General_options::handle_z_option(const char* arg)
745 // ARG may be a word, like "noexec", or it may be an option in its
746 // own right, like "max-page-size=SIZE".
747 const char* argarg = strchr(arg, '='); // the argument to the -z argument
751 arglen = argarg - arg;
755 arglen = strlen(arg);
757 const int z_options_size = options::Command_line_options::z_options_size;
758 const gold::options::One_z_option* z_options =
759 gold::options::Command_line_options::z_options;
760 for (int i = 0; i < z_options_size; ++i)
762 if (memcmp(arg, z_options[i].name, arglen) == 0
763 && z_options[i].name[arglen] == '\0')
765 if (z_options[i].set_noarg && argarg)
766 gold::gold_fatal(_("-z subcommand does not take an argument: %s\n"),
768 else if (z_options[i].set_arg && !argarg)
769 gold::gold_fatal(_("-z subcommand requires an argument: %s\n"),
771 else if (z_options[i].set_arg)
772 (this->*(z_options[i].set_arg))(argarg);
774 (this->*(z_options[i].set_noarg))(true);
779 gold::gold_fatal(_("%s: unrecognized -z subcommand: %s\n"),
783 // Handle the --debug option.
786 General_options::handle_debug_option(const char* arg)
788 const int debug_options_size =
789 options::Command_line_options::debug_options_size;
790 const gold::options::One_debug_option* debug_options =
791 options::Command_line_options::debug_options;
792 for (int i = 0; i < debug_options_size; ++i)
794 if (strcmp(arg, debug_options[i].name) == 0)
796 this->set_debug(debug_options[i].debug_flags);
801 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
803 ::exit(EXIT_FAILURE);
806 // Add the sysroot, if any, to the search paths.
809 General_options::add_sysroot()
811 if (this->sysroot_.empty())
813 this->sysroot_ = get_default_sysroot();
814 if (this->sysroot_.empty())
818 const char* sysroot = this->sysroot_.c_str();
819 char* canonical_sysroot = lrealpath(sysroot);
821 for (Dir_list::iterator p = this->search_path_.begin();
822 p != this->search_path_.end();
824 p->add_sysroot(sysroot, canonical_sysroot);
826 free(canonical_sysroot);
829 // The default values for the position dependent options.
831 Position_dependent_options::Position_dependent_options()
832 : do_static_search_(false),
834 include_whole_archive_(false),
835 input_format_(General_options::OBJECT_FORMAT_ELF)
839 // Set the input format.
842 Position_dependent_options::set_format(const char* arg)
844 this->input_format_ = string_to_object_format(arg);
847 // Search_directory methods.
849 // This is called if we have a sysroot. Apply the sysroot if
850 // appropriate. Record whether the directory is in the sysroot.
853 Search_directory::add_sysroot(const char* sysroot,
854 const char* canonical_sysroot)
856 gold_assert(*sysroot != '\0');
857 if (this->put_in_sysroot_)
859 if (!IS_DIR_SEPARATOR(this->name_[0])
860 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
861 this->name_ = '/' + this->name_;
862 this->name_ = sysroot + this->name_;
863 this->is_in_sysroot_ = true;
867 // Check whether this entry is in the sysroot. To do this
868 // correctly, we need to use canonical names. Otherwise we will
869 // get confused by the ../../.. paths that gcc tends to use.
870 char* canonical_name = lrealpath(this->name_.c_str());
871 int canonical_name_len = strlen(canonical_name);
872 int canonical_sysroot_len = strlen(canonical_sysroot);
873 if (canonical_name_len > canonical_sysroot_len
874 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
876 canonical_name[canonical_sysroot_len] = '\0';
877 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
878 this->is_in_sysroot_ = true;
880 free(canonical_name);
884 // Input_arguments methods.
886 // Add a file to the list.
889 Input_arguments::add_file(const Input_file_argument& file)
891 if (!this->in_group_)
892 this->input_argument_list_.push_back(Input_argument(file));
895 gold_assert(!this->input_argument_list_.empty());
896 gold_assert(this->input_argument_list_.back().is_group());
897 this->input_argument_list_.back().group()->add_file(file);
904 Input_arguments::start_group()
906 gold_assert(!this->in_group_);
907 Input_file_group* group = new Input_file_group();
908 this->input_argument_list_.push_back(Input_argument(group));
909 this->in_group_ = true;
915 Input_arguments::end_group()
917 gold_assert(this->in_group_);
918 this->in_group_ = false;
921 // Command_line options.
923 Command_line::Command_line(Script_options* script_options)
924 : options_(script_options), position_options_(), inputs_()
928 // Process the command line options. For process_one_option,
929 // i is the index of argv to process next, and the return value
930 // is the index of the next option to process (i+1 or i+2, or argc
931 // to indicate processing is done). no_more_options is set to true
932 // if (and when) "--" is seen as an option.
935 Command_line::process_one_option(int argc, char** argv, int i,
936 bool* no_more_options)
938 const int options_size = options::Command_line_options::options_size;
939 const options::One_option* options = options::Command_line_options::options;
940 gold_assert(i < argc);
942 if (argv[i][0] != '-' || *no_more_options)
944 this->add_file(argv[i], false);
948 // Option starting with '-'.
950 if (argv[i][1] == '-')
953 if (argv[i][2] == '\0')
955 *no_more_options = true;
960 // Look for a long option match.
961 char* opt = argv[i] + dashes;
964 char* arg = strchr(opt, '=');
965 bool argument_with_equals = arg != NULL;
971 else if (i + 1 < argc)
978 for (j = 0; j < options_size; ++j)
980 if (options[j].long_option != NULL
983 != options::One_option::EXACTLY_TWO_DASHES))
984 && first == options[j].long_option[0]
985 && strcmp(opt, options[j].long_option) == 0)
987 if (options[j].special)
989 // Restore the '=' we clobbered above.
990 if (arg != NULL && skiparg == 0)
992 i += options[j].special(argc - i, argv + i, opt, true, this);
996 if (!options[j].takes_argument())
998 if (argument_with_equals)
999 this->usage(_("unexpected argument"), argv[i]);
1006 this->usage(_("missing argument"), argv[i]);
1008 this->apply_option(options[j], arg);
1014 if (j < options_size)
1017 // If we saw two dashes, we needed to have seen a long option.
1019 this->usage(_("unknown option"), argv[i]);
1021 // Look for a short option match. There may be more than one
1022 // short option in a given argument.
1024 char* s = argv[i] + 1;
1026 while (*s != '\0' && !done)
1030 for (j = 0; j < options_size; ++j)
1032 if (options[j].short_option == opt)
1034 if (options[j].special)
1036 // Undo the argument skip done above.
1038 i += options[j].special(argc - i, argv + i, s, false,
1045 if (options[j].takes_argument())
1058 this->usage(_("missing argument"), opt);
1060 this->apply_option(options[j], arg);
1066 if (j >= options_size)
1067 this->usage(_("unknown option"), *s);
1076 Command_line::process(int argc, char** argv)
1078 bool no_more_options = false;
1081 i = process_one_option(argc, argv, i, &no_more_options);
1083 if (this->inputs_.in_group())
1085 fprintf(stderr, _("%s: missing group end\n"), program_name);
1089 // FIXME: We should only do this when configured in native mode.
1090 this->options_.add_to_search_path_with_sysroot("/lib");
1091 this->options_.add_to_search_path_with_sysroot("/usr/lib");
1093 this->options_.add_sysroot();
1095 // Ensure options don't contradict each other and are otherwise kosher.
1096 this->normalize_options();
1099 // Extract an option argument for a special option. LONGNAME is the
1100 // long name of the option. This sets *PRET to the return value for
1101 // the special function handler to skip to the next option.
1104 Command_line::get_special_argument(const char* longname, int argc, char** argv,
1105 const char* arg, bool long_option,
1110 size_t longlen = strlen(longname);
1111 gold_assert(strncmp(arg, longname, longlen) == 0);
1120 gold_assert(*arg == '\0');
1139 this->usage(_("missing argument"), arg);
1142 // Ensure options don't contradict each other and are otherwise kosher.
1145 Command_line::normalize_options()
1147 if (this->options_.shared() && this->options_.relocatable())
1148 gold_fatal(_("-shared and -r are incompatible"));
1150 if (this->options_.oformat() != General_options::OBJECT_FORMAT_ELF
1151 && (this->options_.shared() || this->options_.relocatable()))
1152 gold_fatal(_("binary output format not compatible with -shared or -r"));
1154 // If the user specifies both -s and -r, convert the -s as -S.
1155 // -r requires us to keep externally visible symbols!
1156 if (this->options_.strip_all() && this->options_.relocatable())
1158 // Clears the strip_all() status, replacing it with strip_debug().
1159 this->options_.set_strip_debug(true);
1162 // FIXME: we can/should be doing a lot more sanity checking here.
1166 // Apply a command line option.
1169 Command_line::apply_option(const options::One_option& opt,
1174 if (opt.general_noarg)
1175 (this->options_.*(opt.general_noarg))(true);
1176 else if (opt.dependent_noarg)
1177 (this->position_options_.*(opt.dependent_noarg))(true);
1183 if (opt.general_arg)
1184 (this->options_.*(opt.general_arg))(arg);
1185 else if (opt.dependent_arg)
1186 (this->position_options_.*(opt.dependent_arg))(arg);
1192 // Add an input file or library.
1195 Command_line::add_file(const char* name, bool is_lib)
1197 Input_file_argument file(name, is_lib, "", false, this->position_options_);
1198 this->inputs_.add_file(file);
1201 // Handle the -l option, which requires special treatment.
1204 Command_line::process_l_option(int argc, char** argv, char* arg,
1208 const char* libname = this->get_special_argument("library", argc, argv, arg,
1210 this->add_file(libname, true);
1214 // Handle the --start-group option.
1217 Command_line::start_group(const char* arg)
1219 if (this->inputs_.in_group())
1220 this->usage(_("may not nest groups"), arg);
1221 this->inputs_.start_group();
1224 // Handle the --end-group option.
1227 Command_line::end_group(const char* arg)
1229 if (!this->inputs_.in_group())
1230 this->usage(_("group end without group start"), arg);
1231 this->inputs_.end_group();
1234 // Report a usage error. */
1237 Command_line::usage()
1240 _("%s: use the --help option for usage information\n"),
1242 ::exit(EXIT_FAILURE);
1246 Command_line::usage(const char* msg, const char *opt)
1250 program_name, opt, msg);
1255 Command_line::usage(const char* msg, char opt)
1259 program_name, opt, msg);
1263 } // End namespace gold.