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 it.
113 void (General_options::*set)(bool);
116 // We have a separate table for --debug options.
118 struct options::One_debug_option
120 // The name of the option.
123 // The flags to turn on.
124 unsigned int debug_flags;
127 class options::Command_line_options
130 static const One_option options[];
131 static const int options_size;
132 static const One_z_option z_options[];
133 static const int z_options_size;
134 static const One_debug_option debug_options[];
135 static const int debug_options_size;
138 } // End namespace gold.
143 // Recognize input and output target names. The GNU linker accepts
144 // these with --format and --oformat. This code is intended to be
145 // minimally compatible. In practice for an ELF target this would be
146 // the same target as the input files; that name always start with
147 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
148 // "binary", "ihex". See also
149 // General_options::default_target_settings.
151 gold::General_options::Object_format
152 string_to_object_format(const char* arg)
154 if (strncmp(arg, "elf", 3) == 0)
155 return gold::General_options::OBJECT_FORMAT_ELF;
156 else if (strcmp(arg, "binary") == 0)
157 return gold::General_options::OBJECT_FORMAT_BINARY;
160 gold::gold_error(_("format '%s' not supported "
161 "(supported formats: elf, binary)"),
163 return gold::General_options::OBJECT_FORMAT_ELF;
167 // Handle the special -l option, which adds an input file.
170 library(int argc, char** argv, char* arg, bool long_option,
171 gold::Command_line* cmdline)
173 return cmdline->process_l_option(argc, argv, arg, long_option);
176 // Handle the -R option. Historically the GNU linker made -R a
177 // synonym for --just-symbols. ELF linkers have traditionally made -R
178 // a synonym for -rpath. When ELF support was added to the GNU
179 // linker, -R was changed to switch based on the argument: if the
180 // argument is an ordinary file, we treat it as --just-symbols,
181 // otherwise we treat it as -rpath. We need to be compatible with
182 // this, because existing build scripts rely on it.
185 handle_r_option(int argc, char** argv, char* arg, bool long_option,
186 gold::Command_line* cmdline)
189 const char* val = cmdline->get_special_argument("R", argc, argv, arg,
192 if (::stat(val, &s) != 0 || S_ISDIR(s.st_mode))
193 cmdline->add_to_rpath(val);
195 cmdline->add_just_symbols_file(val);
199 // Handle the --just-symbols option.
202 handle_just_symbols_option(int argc, char** argv, char* arg,
203 bool long_option, gold::Command_line* cmdline)
206 const char* val = cmdline->get_special_argument("just-symbols", argc, argv,
207 arg, long_option, &ret);
208 cmdline->add_just_symbols_file(val);
212 // Handle the special -T/--script option, which reads a linker script.
215 invoke_script(int argc, char** argv, char* arg, bool long_option,
216 gold::Command_line* cmdline)
219 const char* script_name = cmdline->get_special_argument("script", argc, argv,
222 if (!read_commandline_script(script_name, cmdline))
223 gold::gold_fatal(_("unable to parse script file %s"), script_name);
227 // Handle the special --version-script option, which reads a version script.
230 invoke_version_script(int argc, char** argv, char* arg, bool long_option,
231 gold::Command_line* cmdline)
234 const char* script_name = cmdline->get_special_argument("version-script",
238 if (!read_version_script(script_name, cmdline))
239 gold::gold_fatal(_("unable to parse version script file %s"), script_name);
243 // Handle the special --start-group option.
246 start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
248 cmdline->start_group(arg);
252 // Handle the special --end-group option.
255 end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
257 cmdline->end_group(arg);
261 // Report usage information for ld --help, and exit.
264 help(int, char**, char*, bool, gold::Command_line*)
266 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
268 const int options_size = gold::options::Command_line_options::options_size;
269 const gold::options::One_option* options =
270 gold::options::Command_line_options::options;
271 for (int i = 0; i < options_size; ++i)
273 if (options[i].doc == NULL)
283 if (options[j].help_output != NULL)
290 printf(options[j].help_output);
291 len += std::strlen(options[j].help_output);
296 if (options[j].short_option != '\0')
303 printf("-%c", options[j].short_option);
308 if (options[j].long_option != NULL)
315 if (options[j].dash == gold::options::One_option::ONE_DASH)
325 printf("%s", options[j].long_option);
326 len += std::strlen(options[j].long_option);
332 while (j < options_size && options[j].doc == NULL);
339 for (; len < 30; ++len)
342 std::puts(options[i].doc);
345 ::exit(EXIT_SUCCESS);
350 // Report version information.
353 version(int, char**, char* opt, bool, gold::Command_line*)
355 gold::print_version(opt[0] == 'v' && opt[1] == '\0');
356 ::exit(EXIT_SUCCESS);
360 // If the default sysroot is relocatable, try relocating it based on
364 get_relative_sysroot(const char* from)
366 char* path = make_relative_prefix(gold::program_name, from,
371 if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
379 // Return the default sysroot. This is set by the --with-sysroot
380 // option to configure.
383 get_default_sysroot()
385 const char* sysroot = TARGET_SYSTEM_ROOT;
386 if (*sysroot == '\0')
389 if (TARGET_SYSTEM_ROOT_RELOCATABLE)
391 char* path = get_relative_sysroot (BINDIR);
393 path = get_relative_sysroot (TOOLBINDIR);
396 std::string ret = path;
405 } // End anonymous namespace.
410 // Helper macros used to specify the options. We could also do this
411 // using constructors, but then g++ would generate code to initialize
412 // the array. We want the array to be initialized statically so that
413 // we get better startup time.
415 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
416 { short_option, long_option, doc, help, options::One_option::dash, \
417 NULL, func, NULL, NULL, NULL }
418 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
419 { short_option, long_option, doc, help, options::One_option::dash, \
420 NULL, NULL, func, NULL, NULL }
421 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
422 { short_option, long_option, doc, help, options::One_option::dash, \
423 NULL, NULL, NULL, func, NULL }
424 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
425 { short_option, long_option, doc, help, options::One_option::dash, \
426 NULL, NULL, NULL, NULL, func }
427 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
428 { short_option, long_option, doc, help, options::One_option::dash, \
429 func, NULL, NULL, NULL, NULL }
431 // Here is the actual list of options which we accept.
433 const options::One_option
434 options::Command_line_options::options[] =
436 GENERAL_NOARG('\0', "allow-shlib-undefined",
437 N_("Allow unresolved references in shared libraries"),
439 &General_options::set_allow_shlib_undefined),
440 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
441 N_("Do not allow unresolved references in shared libraries"),
443 &General_options::set_no_allow_shlib_undefined),
444 POSDEP_NOARG('\0', "as-needed",
445 N_("Only set DT_NEEDED for dynamic libs if used"),
446 NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
447 POSDEP_NOARG('\0', "no-as-needed",
448 N_("Always DT_NEEDED for dynamic libs (default)"),
449 NULL, TWO_DASHES, &Position_dependent_options::set_no_as_needed),
450 POSDEP_NOARG('\0', "Bdynamic",
451 N_("-l searches for shared libraries"),
453 &Position_dependent_options::set_Bdynamic),
454 POSDEP_NOARG('\0', "Bstatic",
455 N_("-l does not search for shared libraries"),
457 &Position_dependent_options::set_Bstatic),
458 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
459 NULL, ONE_DASH, &General_options::set_Bsymbolic),
460 POSDEP_ARG('b', "format", N_("Set input format (elf, binary)"),
461 N_("-b FORMAT, --format FORMAT"), TWO_DASHES,
462 &Position_dependent_options::set_format),
464 # define ZLIB_STR ",zlib"
468 GENERAL_ARG('\0', "compress-debug-sections",
469 N_("Compress .debug_* sections in the output file "
470 "(default is none)"),
471 N_("--compress-debug-sections=[none" ZLIB_STR "]"),
473 &General_options::set_compress_debug_sections),
474 GENERAL_ARG('\0', "defsym", N_("Define a symbol"),
475 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES,
476 &General_options::add_to_defsym),
477 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
478 NULL, TWO_DASHES, &General_options::set_demangle),
479 GENERAL_NOARG('\0', "no-demangle",
480 N_("Do not demangle C++ symbols in log messages"),
481 NULL, TWO_DASHES, &General_options::set_no_demangle),
482 GENERAL_NOARG('\0', "detect-odr-violations",
483 N_("Try to detect violations of the One Definition Rule"),
484 NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
485 GENERAL_ARG('e', "entry", N_("Set program start address"),
486 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
487 &General_options::set_entry),
488 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
489 NULL, TWO_DASHES, &General_options::set_export_dynamic),
490 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
491 NULL, TWO_DASHES, &General_options::set_eh_frame_hdr),
492 GENERAL_ARG('h', "soname", N_("Set shared library name"),
493 N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
494 &General_options::set_soname),
495 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
496 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
497 &General_options::set_dynamic_linker),
498 SPECIAL('l', "library", N_("Search for library LIBNAME"),
499 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
501 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
502 N_("-L DIR, --library-path DIR"), TWO_DASHES,
503 &General_options::add_to_search_path),
504 GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
505 &General_options::ignore),
506 GENERAL_ARG('o', "output", N_("Set output file name"),
507 N_("-o FILE, --output FILE"), TWO_DASHES,
508 &General_options::set_output),
509 GENERAL_ARG('O', "optimize", N_("Optimize output file size"),
510 N_("-O level"), ONE_DASH,
511 &General_options::set_optimize),
512 GENERAL_ARG('\0', "oformat", N_("Set output format (only binary supported)"),
513 N_("--oformat FORMAT"), EXACTLY_TWO_DASHES,
514 &General_options::set_oformat),
515 GENERAL_NOARG('r', "relocatable", N_("Generate relocatable output"), NULL,
516 ONE_DASH, &General_options::set_relocatable),
517 // -R really means -rpath, but can mean --just-symbols for
518 // compatibility with GNU ld. -rpath is always -rpath, so we list
520 SPECIAL('R', NULL, N_("Add DIR to runtime search path"),
521 N_("-R DIR"), ONE_DASH, &handle_r_option),
522 GENERAL_ARG('\0', "rpath", NULL, N_("-rpath DIR"), ONE_DASH,
523 &General_options::add_to_rpath),
524 SPECIAL('\0', "just-symbols", N_("Read only symbol values from file"),
525 N_("-R FILE, --just-symbols FILE"), TWO_DASHES,
526 &handle_just_symbols_option),
527 GENERAL_ARG('\0', "rpath-link",
528 N_("Add DIR to link time shared library search path"),
529 N_("--rpath-link DIR"), TWO_DASHES,
530 &General_options::add_to_rpath_link),
531 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
532 TWO_DASHES, &General_options::set_strip_all),
533 GENERAL_NOARG('\0', "strip-debug-gdb",
534 N_("Strip debug symbols that are unused by gdb "
535 "(at least versions <= 6.7)"),
536 NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
537 // This must come after -Sdebug since it's a prefix of it.
538 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
539 TWO_DASHES, &General_options::set_strip_debug),
540 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
541 NULL, ONE_DASH, &General_options::set_shared),
542 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
543 NULL, ONE_DASH, &General_options::set_static),
544 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
545 NULL, TWO_DASHES, &General_options::set_stats),
546 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
547 N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
548 GENERAL_ARG('\0', "Tbss", N_("Set the address of the bss segment"),
549 N_("-Tbss ADDRESS"), ONE_DASH,
550 &General_options::set_Tbss),
551 GENERAL_ARG('\0', "Tdata", N_("Set the address of the data segment"),
552 N_("-Tdata ADDRESS"), ONE_DASH,
553 &General_options::set_Tdata),
554 GENERAL_ARG('\0', "Ttext", N_("Set the address of the text segment"),
555 N_("-Ttext ADDRESS"), ONE_DASH,
556 &General_options::set_Ttext),
557 // This must come after -Ttext and friends since it's a prefix of
559 SPECIAL('T', "script", N_("Read linker script"),
560 N_("-T FILE, --script FILE"), TWO_DASHES,
562 SPECIAL('\0', "version-script", N_("Read version script"),
563 N_("--version-script FILE"), TWO_DASHES,
564 &invoke_version_script),
565 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
566 NULL, TWO_DASHES, &General_options::set_threads),
567 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
568 NULL, TWO_DASHES, &General_options::set_no_threads),
569 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
570 N_("--thread-count COUNT"), TWO_DASHES,
571 &General_options::set_thread_count),
572 GENERAL_ARG('\0', "thread-count-initial",
573 N_("Number of threads to use in initial pass"),
574 N_("--thread-count-initial COUNT"), TWO_DASHES,
575 &General_options::set_thread_count_initial),
576 GENERAL_ARG('\0', "thread-count-middle",
577 N_("Number of threads to use in middle pass"),
578 N_("--thread-count-middle COUNT"), TWO_DASHES,
579 &General_options::set_thread_count_middle),
580 GENERAL_ARG('\0', "thread-count-final",
581 N_("Number of threads to use in final pass"),
582 N_("--thread-count-final COUNT"), TWO_DASHES,
583 &General_options::set_thread_count_final),
584 POSDEP_NOARG('\0', "whole-archive",
585 N_("Include all archive contents"),
587 &Position_dependent_options::set_whole_archive),
588 POSDEP_NOARG('\0', "no-whole-archive",
589 N_("Include only needed archive contents"),
591 &Position_dependent_options::set_no_whole_archive),
593 GENERAL_ARG('z', NULL,
594 N_("Subcommands as follows:\n\
595 -z execstack Mark output as requiring executable stack\n\
596 -z noexecstack Mark output as not requiring executable stack"),
597 N_("-z SUBCOMMAND"), ONE_DASH,
598 &General_options::handle_z_option),
600 SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
601 TWO_DASHES, &start_group),
602 SPECIAL(')', "end-group", N_("End a library search group"), NULL,
603 TWO_DASHES, &end_group),
604 SPECIAL('\0', "help", N_("Report usage information"), NULL,
606 SPECIAL('v', "version", N_("Report version information"), NULL,
607 TWO_DASHES, &version),
608 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task,script)"),
609 N_("--debug=TYPE"), TWO_DASHES,
610 &General_options::handle_debug_option)
613 const int options::Command_line_options::options_size =
614 sizeof (options) / sizeof (options[0]);
618 const options::One_z_option
619 options::Command_line_options::z_options[] =
621 { "execstack", &General_options::set_execstack },
622 { "noexecstack", &General_options::set_noexecstack },
625 const int options::Command_line_options::z_options_size =
626 sizeof(z_options) / sizeof(z_options[0]);
628 // The --debug options.
630 const options::One_debug_option
631 options::Command_line_options::debug_options[] =
633 { "all", DEBUG_ALL },
634 { "task", DEBUG_TASK },
635 { "script", DEBUG_SCRIPT }
638 const int options::Command_line_options::debug_options_size =
639 sizeof(debug_options) / sizeof(debug_options[0]);
641 // The default values for the general options.
643 General_options::General_options(Script_options* script_options)
644 : export_dynamic_(false),
646 dynamic_linker_(NULL),
648 optimization_level_(0),
649 output_file_name_("a.out"),
650 oformat_(OBJECT_FORMAT_ELF),
651 oformat_string_(NULL),
652 is_relocatable_(false),
654 allow_shlib_undefined_(false),
656 compress_debug_sections_(NO_COMPRESSION),
657 detect_odr_violations_(false),
658 create_eh_frame_hdr_(false),
665 bss_segment_address_(-1U), // -1 indicates value not set by user
666 data_segment_address_(-1U),
667 text_segment_address_(-1U),
669 thread_count_initial_(0),
670 thread_count_middle_(0),
671 thread_count_final_(0),
672 execstack_(EXECSTACK_FROM_INPUT),
674 script_options_(script_options)
676 // We initialize demangle_ based on the environment variable
677 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
678 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
679 // environment. Acting the same way here lets us provide the same
680 // interface by default.
681 this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
684 // Handle the --defsym option.
687 General_options::add_to_defsym(const char* arg)
689 this->script_options_->define_symbol(arg);
692 // Handle the --oformat option.
695 General_options::set_oformat(const char* arg)
697 this->oformat_string_ = arg;
698 this->oformat_ = string_to_object_format(arg);
701 // The x86_64 kernel build converts a binary file to an object file
702 // using -r --format binary --oformat elf32-i386 foo.o. In order to
703 // support that for gold we support determining the default target
704 // choice from the output format. We recognize names that the GNU
708 General_options::default_target() const
710 if (this->oformat_string_ != NULL)
712 Target* target = select_target_by_name(this->oformat_string_);
716 gold_error(_("unrecognized output format %s"),
717 this->oformat_string_);
720 // The GOLD_DEFAULT_xx macros are defined by the configure script.
721 Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE,
723 GOLD_DEFAULT_BIG_ENDIAN,
725 gold_assert(target != NULL);
729 // Handle the -z option.
732 General_options::handle_z_option(const char* arg)
734 const int z_options_size = options::Command_line_options::z_options_size;
735 const gold::options::One_z_option* z_options =
736 gold::options::Command_line_options::z_options;
737 for (int i = 0; i < z_options_size; ++i)
739 if (strcmp(arg, z_options[i].name) == 0)
741 (this->*(z_options[i].set))(true);
746 fprintf(stderr, _("%s: unrecognized -z subcommand: %s\n"),
748 ::exit(EXIT_FAILURE);
751 // Handle the --debug option.
754 General_options::handle_debug_option(const char* arg)
756 const int debug_options_size =
757 options::Command_line_options::debug_options_size;
758 const gold::options::One_debug_option* debug_options =
759 options::Command_line_options::debug_options;
760 for (int i = 0; i < debug_options_size; ++i)
762 if (strcmp(arg, debug_options[i].name) == 0)
764 this->set_debug(debug_options[i].debug_flags);
769 fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
771 ::exit(EXIT_FAILURE);
774 // Add the sysroot, if any, to the search paths.
777 General_options::add_sysroot()
779 if (this->sysroot_.empty())
781 this->sysroot_ = get_default_sysroot();
782 if (this->sysroot_.empty())
786 const char* sysroot = this->sysroot_.c_str();
787 char* canonical_sysroot = lrealpath(sysroot);
789 for (Dir_list::iterator p = this->search_path_.begin();
790 p != this->search_path_.end();
792 p->add_sysroot(sysroot, canonical_sysroot);
794 free(canonical_sysroot);
797 // The default values for the position dependent options.
799 Position_dependent_options::Position_dependent_options()
800 : do_static_search_(false),
802 include_whole_archive_(false),
803 input_format_(General_options::OBJECT_FORMAT_ELF)
807 // Set the input format.
810 Position_dependent_options::set_format(const char* arg)
812 this->input_format_ = string_to_object_format(arg);
815 // Search_directory methods.
817 // This is called if we have a sysroot. Apply the sysroot if
818 // appropriate. Record whether the directory is in the sysroot.
821 Search_directory::add_sysroot(const char* sysroot,
822 const char* canonical_sysroot)
824 gold_assert(*sysroot != '\0');
825 if (this->put_in_sysroot_)
827 if (!IS_DIR_SEPARATOR(this->name_[0])
828 && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
829 this->name_ = '/' + this->name_;
830 this->name_ = sysroot + this->name_;
831 this->is_in_sysroot_ = true;
835 // Check whether this entry is in the sysroot. To do this
836 // correctly, we need to use canonical names. Otherwise we will
837 // get confused by the ../../.. paths that gcc tends to use.
838 char* canonical_name = lrealpath(this->name_.c_str());
839 int canonical_name_len = strlen(canonical_name);
840 int canonical_sysroot_len = strlen(canonical_sysroot);
841 if (canonical_name_len > canonical_sysroot_len
842 && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
844 canonical_name[canonical_sysroot_len] = '\0';
845 if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
846 this->is_in_sysroot_ = true;
848 free(canonical_name);
852 // Input_arguments methods.
854 // Add a file to the list.
857 Input_arguments::add_file(const Input_file_argument& file)
859 if (!this->in_group_)
860 this->input_argument_list_.push_back(Input_argument(file));
863 gold_assert(!this->input_argument_list_.empty());
864 gold_assert(this->input_argument_list_.back().is_group());
865 this->input_argument_list_.back().group()->add_file(file);
872 Input_arguments::start_group()
874 gold_assert(!this->in_group_);
875 Input_file_group* group = new Input_file_group();
876 this->input_argument_list_.push_back(Input_argument(group));
877 this->in_group_ = true;
883 Input_arguments::end_group()
885 gold_assert(this->in_group_);
886 this->in_group_ = false;
889 // Command_line options.
891 Command_line::Command_line(Script_options* script_options)
892 : options_(script_options), position_options_(), inputs_()
896 // Process the command line options. For process_one_option,
897 // i is the index of argv to process next, and the return value
898 // is the index of the next option to process (i+1 or i+2, or argc
899 // to indicate processing is done). no_more_options is set to true
900 // if (and when) "--" is seen as an option.
903 Command_line::process_one_option(int argc, char** argv, int i,
904 bool* no_more_options)
906 const int options_size = options::Command_line_options::options_size;
907 const options::One_option* options = options::Command_line_options::options;
908 gold_assert(i < argc);
910 if (argv[i][0] != '-' || *no_more_options)
912 this->add_file(argv[i], false);
916 // Option starting with '-'.
918 if (argv[i][1] == '-')
921 if (argv[i][2] == '\0')
923 *no_more_options = true;
928 // Look for a long option match.
929 char* opt = argv[i] + dashes;
932 char* arg = strchr(opt, '=');
933 bool argument_with_equals = arg != NULL;
939 else if (i + 1 < argc)
946 for (j = 0; j < options_size; ++j)
948 if (options[j].long_option != NULL
951 != options::One_option::EXACTLY_TWO_DASHES))
952 && first == options[j].long_option[0]
953 && strcmp(opt, options[j].long_option) == 0)
955 if (options[j].special)
957 // Restore the '=' we clobbered above.
958 if (arg != NULL && skiparg == 0)
960 i += options[j].special(argc - i, argv + i, opt, true, this);
964 if (!options[j].takes_argument())
966 if (argument_with_equals)
967 this->usage(_("unexpected argument"), argv[i]);
974 this->usage(_("missing argument"), argv[i]);
976 this->apply_option(options[j], arg);
982 if (j < options_size)
985 // If we saw two dashes, we needed to have seen a long option.
987 this->usage(_("unknown option"), argv[i]);
989 // Look for a short option match. There may be more than one
990 // short option in a given argument.
992 char* s = argv[i] + 1;
994 while (*s != '\0' && !done)
998 for (j = 0; j < options_size; ++j)
1000 if (options[j].short_option == opt)
1002 if (options[j].special)
1004 // Undo the argument skip done above.
1006 i += options[j].special(argc - i, argv + i, s, false,
1013 if (options[j].takes_argument())
1026 this->usage(_("missing argument"), opt);
1028 this->apply_option(options[j], arg);
1034 if (j >= options_size)
1035 this->usage(_("unknown option"), *s);
1044 Command_line::process(int argc, char** argv)
1046 bool no_more_options = false;
1049 i = process_one_option(argc, argv, i, &no_more_options);
1051 if (this->inputs_.in_group())
1053 fprintf(stderr, _("%s: missing group end\n"), program_name);
1057 // FIXME: We should only do this when configured in native mode.
1058 this->options_.add_to_search_path_with_sysroot("/lib");
1059 this->options_.add_to_search_path_with_sysroot("/usr/lib");
1061 this->options_.add_sysroot();
1063 // Ensure options don't contradict each other and are otherwise kosher.
1064 this->normalize_options();
1067 // Extract an option argument for a special option. LONGNAME is the
1068 // long name of the option. This sets *PRET to the return value for
1069 // the special function handler to skip to the next option.
1072 Command_line::get_special_argument(const char* longname, int argc, char** argv,
1073 const char* arg, bool long_option,
1078 size_t longlen = strlen(longname);
1079 gold_assert(strncmp(arg, longname, longlen) == 0);
1088 gold_assert(*arg == '\0');
1107 this->usage(_("missing argument"), arg);
1110 // Ensure options don't contradict each other and are otherwise kosher.
1113 Command_line::normalize_options()
1115 if (this->options_.shared() && this->options_.relocatable())
1116 gold_fatal(_("-shared and -r are incompatible"));
1118 if (this->options_.oformat() != General_options::OBJECT_FORMAT_ELF
1119 && (this->options_.shared() || this->options_.relocatable()))
1120 gold_fatal(_("binary output format not compatible with -shared or -r"));
1122 // If the user specifies both -s and -r, convert the -s as -S.
1123 // -r requires us to keep externally visible symbols!
1124 if (this->options_.strip_all() && this->options_.relocatable())
1126 // Clears the strip_all() status, replacing it with strip_debug().
1127 this->options_.set_strip_debug(true);
1130 // FIXME: we can/should be doing a lot more sanity checking here.
1134 // Apply a command line option.
1137 Command_line::apply_option(const options::One_option& opt,
1142 if (opt.general_noarg)
1143 (this->options_.*(opt.general_noarg))(true);
1144 else if (opt.dependent_noarg)
1145 (this->position_options_.*(opt.dependent_noarg))(true);
1151 if (opt.general_arg)
1152 (this->options_.*(opt.general_arg))(arg);
1153 else if (opt.dependent_arg)
1154 (this->position_options_.*(opt.dependent_arg))(arg);
1160 // Add an input file or library.
1163 Command_line::add_file(const char* name, bool is_lib)
1165 Input_file_argument file(name, is_lib, "", false, this->position_options_);
1166 this->inputs_.add_file(file);
1169 // Handle the -l option, which requires special treatment.
1172 Command_line::process_l_option(int argc, char** argv, char* arg,
1176 const char* libname = this->get_special_argument("library", argc, argv, arg,
1178 this->add_file(libname, true);
1182 // Handle the --start-group option.
1185 Command_line::start_group(const char* arg)
1187 if (this->inputs_.in_group())
1188 this->usage(_("may not nest groups"), arg);
1189 this->inputs_.start_group();
1192 // Handle the --end-group option.
1195 Command_line::end_group(const char* arg)
1197 if (!this->inputs_.in_group())
1198 this->usage(_("group end without group start"), arg);
1199 this->inputs_.end_group();
1202 // Report a usage error. */
1205 Command_line::usage()
1208 _("%s: use the --help option for usage information\n"),
1210 ::exit(EXIT_FAILURE);
1214 Command_line::usage(const char* msg, const char *opt)
1218 program_name, opt, msg);
1223 Command_line::usage(const char* msg, char opt)
1227 program_name, opt, msg);
1231 } // End namespace gold.