1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
28 #include "filenames.h"
29 #include "libiberty.h"
38 // The information we keep for a single command line option.
40 struct options::One_option
42 // The single character option name, or '\0' if this is only a long
46 // The long option name, or NULL if this is only a short option.
47 const char* long_option
;
49 // Description of the option for --help output, or NULL if there is none.
52 // How to print the option name in --help output, or NULL to use the
54 const char* help_output
;
56 // Long option dash control. This is ignored if long_option is
60 // Long option normally takes one dash; two dashes are also
63 // Long option normally takes two dashes; one dash is also
66 // Long option always takes two dashes.
70 // Function for special handling, or NULL. Returns the number of
71 // arguments to skip. This will normally be at least 1, but it may
72 // be 0 if this function changes *argv. ARG points to the location
73 // in *ARGV where the option starts, which may be helpful for a
75 int (*special
)(int argc
, char** argv
, char *arg
, bool long_option
,
78 // If this is a position independent option which does not take an
79 // argument, this is the member function to call to record it.
80 void (General_options::*general_noarg
)();
82 // If this is a position independent function which takes an
83 // argument, this is the member function to call to record it.
84 void (General_options::*general_arg
)(const char*);
86 // If this is a position dependent option which does not take an
87 // argument, this is the member function to call to record it.
88 void (Position_dependent_options::*dependent_noarg
)();
90 // If this is a position dependent option which takes an argument,
91 // this is the member function to record it.
92 void (Position_dependent_options::*dependent_arg
)(const char*);
94 // Return whether this option takes an argument.
96 takes_argument() const
97 { return this->general_arg
!= NULL
|| this->dependent_arg
!= NULL
; }
100 // We have a separate table for -z options.
102 struct options::One_z_option
104 // The name of the option.
107 // The member function in General_options called to record it.
108 void (General_options::*set
)();
111 // We have a separate table for --debug options.
113 struct options::One_debug_option
115 // The name of the option.
118 // The flags to turn on.
119 unsigned int debug_flags
;
122 class options::Command_line_options
125 static const One_option options
[];
126 static const int options_size
;
127 static const One_z_option z_options
[];
128 static const int z_options_size
;
129 static const One_debug_option debug_options
[];
130 static const int debug_options_size
;
133 } // End namespace gold.
138 // Handle the special -l option, which adds an input file.
141 library(int argc
, char** argv
, char* arg
, bool long_option
,
142 gold::Command_line
* cmdline
)
144 return cmdline
->process_l_option(argc
, argv
, arg
, long_option
);
147 // Handle the special -T/--script option, which reads a linker script.
150 invoke_script(int argc
, char** argv
, char* arg
, bool long_option
,
151 gold::Command_line
* cmdline
)
154 const char* script_name
= cmdline
->get_special_argument("script", argc
, argv
,
157 if (!read_commandline_script(script_name
, cmdline
))
158 gold::gold_fatal(_("unable to parse script file %s"), script_name
);
162 // Handle the special --version-script option, which reads a version script.
165 invoke_version_script(int argc
, char** argv
, char* arg
, bool long_option
,
166 gold::Command_line
* cmdline
)
169 const char* script_name
= cmdline
->get_special_argument("version-script",
173 if (!read_version_script(script_name
, cmdline
))
174 gold::gold_fatal(_("unable to parse version script file %s"), script_name
);
178 // Handle the special --start-group option.
181 start_group(int, char**, char* arg
, bool, gold::Command_line
* cmdline
)
183 cmdline
->start_group(arg
);
187 // Handle the special --end-group option.
190 end_group(int, char**, char* arg
, bool, gold::Command_line
* cmdline
)
192 cmdline
->end_group(arg
);
196 // Report usage information for ld --help, and exit.
199 help(int, char**, char*, bool, gold::Command_line
*)
201 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name
);
203 const int options_size
= gold::options::Command_line_options::options_size
;
204 const gold::options::One_option
* options
=
205 gold::options::Command_line_options::options
;
206 for (int i
= 0; i
< options_size
; ++i
)
208 if (options
[i
].doc
== NULL
)
218 if (options
[j
].help_output
!= NULL
)
225 printf(options
[j
].help_output
);
226 len
+= std::strlen(options
[i
].help_output
);
231 if (options
[j
].short_option
!= '\0')
238 printf("-%c", options
[j
].short_option
);
243 if (options
[j
].long_option
!= NULL
)
250 if (options
[j
].dash
== gold::options::One_option::ONE_DASH
)
260 printf("%s", options
[j
].long_option
);
261 len
+= std::strlen(options
[j
].long_option
);
267 while (j
< options_size
&& options
[j
].doc
== NULL
);
274 for (; len
< 30; ++len
)
277 std::puts(options
[i
].doc
);
280 ::exit(EXIT_SUCCESS
);
285 // Report version information.
288 version(int, char**, char* opt
, bool, gold::Command_line
*)
290 gold::print_version(opt
[0] == 'v' && opt
[1] == '\0');
291 ::exit(EXIT_SUCCESS
);
295 // If the default sysroot is relocatable, try relocating it based on
299 get_relative_sysroot(const char* from
)
301 char* path
= make_relative_prefix(gold::program_name
, from
,
306 if (::stat(path
, &s
) == 0 && S_ISDIR(s
.st_mode
))
314 // Return the default sysroot. This is set by the --with-sysroot
315 // option to configure.
318 get_default_sysroot()
320 const char* sysroot
= TARGET_SYSTEM_ROOT
;
321 if (*sysroot
== '\0')
324 if (TARGET_SYSTEM_ROOT_RELOCATABLE
)
326 char* path
= get_relative_sysroot (BINDIR
);
328 path
= get_relative_sysroot (TOOLBINDIR
);
331 std::string ret
= path
;
340 } // End anonymous namespace.
345 // Helper macros used to specify the options. We could also do this
346 // using constructors, but then g++ would generate code to initialize
347 // the array. We want the array to be initialized statically so that
348 // we get better startup time.
350 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
351 { short_option, long_option, doc, help, options::One_option::dash, \
352 NULL, func, NULL, NULL, NULL }
353 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
354 { short_option, long_option, doc, help, options::One_option::dash, \
355 NULL, NULL, func, NULL, NULL }
356 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
357 { short_option, long_option, doc, help, options::One_option::dash, \
358 NULL, NULL, NULL, func, NULL }
359 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
360 { short_option, long_option, doc, help, options::One_option::dash, \
361 NULL, NULL, NULL, NULL, func }
362 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
363 { short_option, long_option, doc, help, options::One_option::dash, \
364 func, NULL, NULL, NULL, NULL }
366 // Here is the actual list of options which we accept.
368 const options::One_option
369 options::Command_line_options::options
[] =
371 GENERAL_NOARG('\0', "allow-shlib-undefined",
372 N_("Allow unresolved references in shared libraries"),
374 &General_options::set_allow_shlib_undefined
),
375 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
376 N_("Do not allow unresolved references in shared libraries"),
378 &General_options::set_no_allow_shlib_undefined
),
379 POSDEP_NOARG('\0', "as-needed",
380 N_("Only set DT_NEEDED for dynamic libs if used"),
381 NULL
, TWO_DASHES
, &Position_dependent_options::set_as_needed
),
382 POSDEP_NOARG('\0', "no-as-needed",
383 N_("Always DT_NEEDED for dynamic libs (default)"),
384 NULL
, TWO_DASHES
, &Position_dependent_options::clear_as_needed
),
385 POSDEP_NOARG('\0', "Bdynamic",
386 N_("-l searches for shared libraries"),
388 &Position_dependent_options::set_dynamic_search
),
389 POSDEP_NOARG('\0', "Bstatic",
390 N_("-l does not search for shared libraries"),
392 &Position_dependent_options::set_static_search
),
393 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
394 NULL
, ONE_DASH
, &General_options::set_symbolic
),
396 # define ZLIB_STR ",zlib"
400 GENERAL_ARG('\0', "compress-debug-sections",
401 N_("Compress .debug_* sections in the output file "
402 "(default is none)"),
403 N_("--compress-debug-sections=[none" ZLIB_STR
"]"),
405 &General_options::set_compress_debug_sections
),
406 GENERAL_ARG('\0', "defsym", N_("Define a symbol"),
407 N_("--defsym SYMBOL=EXPRESSION"), TWO_DASHES
,
408 &General_options::define_symbol
),
409 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
410 NULL
, TWO_DASHES
, &General_options::set_demangle
),
411 GENERAL_NOARG('\0', "no-demangle",
412 N_("Do not demangle C++ symbols in log messages"),
413 NULL
, TWO_DASHES
, &General_options::clear_demangle
),
414 GENERAL_NOARG('\0', "detect-odr-violations",
415 N_("Try to detect violations of the One Definition Rule"),
416 NULL
, TWO_DASHES
, &General_options::set_detect_odr_violations
),
417 GENERAL_ARG('e', "entry", N_("Set program start address"),
418 N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES
,
419 &General_options::set_entry
),
420 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
421 NULL
, TWO_DASHES
, &General_options::set_export_dynamic
),
422 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
423 NULL
, TWO_DASHES
, &General_options::set_create_eh_frame_hdr
),
424 GENERAL_ARG('h', "soname", N_("Set shared library name"),
425 N_("-h FILENAME, -soname FILENAME"), ONE_DASH
,
426 &General_options::set_soname
),
427 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
428 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES
,
429 &General_options::set_dynamic_linker
),
430 SPECIAL('l', "library", N_("Search for library LIBNAME"),
431 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES
,
433 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
434 N_("-L DIR, --library-path DIR"), TWO_DASHES
,
435 &General_options::add_to_search_path
),
436 GENERAL_ARG('m', NULL
, N_("Ignored for compatibility"), NULL
, ONE_DASH
,
437 &General_options::ignore
),
438 GENERAL_ARG('o', "output", N_("Set output file name"),
439 N_("-o FILE, --output FILE"), TWO_DASHES
,
440 &General_options::set_output_file_name
),
441 GENERAL_ARG('O', NULL
, N_("Optimize output file size"),
442 N_("-O level"), ONE_DASH
,
443 &General_options::set_optimization_level
),
444 GENERAL_NOARG('r', NULL
, N_("Generate relocatable output"), NULL
,
445 ONE_DASH
, &General_options::set_relocatable
),
446 GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
447 N_("-R DIR, -rpath DIR"), ONE_DASH
,
448 &General_options::add_to_rpath
),
449 GENERAL_ARG('\0', "rpath-link",
450 N_("Add DIR to link time shared library search path"),
451 N_("--rpath-link DIR"), TWO_DASHES
,
452 &General_options::add_to_rpath_link
),
453 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL
,
454 TWO_DASHES
, &General_options::set_strip_all
),
455 GENERAL_NOARG('\0', "strip-debug-gdb",
456 N_("Strip debug symbols that are unused by gdb "
457 "(at least versions <= 6.7)"),
458 NULL
, TWO_DASHES
, &General_options::set_strip_debug_gdb
),
459 // This must come after -Sdebug since it's a prefix of it.
460 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL
,
461 TWO_DASHES
, &General_options::set_strip_debug
),
462 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
463 NULL
, ONE_DASH
, &General_options::set_shared
),
464 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
465 NULL
, ONE_DASH
, &General_options::set_static
),
466 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
467 NULL
, TWO_DASHES
, &General_options::set_stats
),
468 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
469 N_("--sysroot DIR"), TWO_DASHES
, &General_options::set_sysroot
),
470 GENERAL_ARG('\0', "Ttext", N_("Set the address of the .text section"),
471 N_("-Ttext ADDRESS"), ONE_DASH
,
472 &General_options::set_text_segment_address
),
473 // This must come after -Ttext since it's a prefix of it.
474 SPECIAL('T', "script", N_("Read linker script"),
475 N_("-T FILE, --script FILE"), TWO_DASHES
,
477 SPECIAL('\0', "version-script", N_("Read version script"),
478 N_("--version-script FILE"), TWO_DASHES
,
479 &invoke_version_script
),
480 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
481 NULL
, TWO_DASHES
, &General_options::set_threads
),
482 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
483 NULL
, TWO_DASHES
, &General_options::clear_threads
),
484 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
485 N_("--thread-count COUNT"), TWO_DASHES
,
486 &General_options::set_thread_count
),
487 GENERAL_ARG('\0', "thread-count-initial",
488 N_("Number of threads to use in initial pass"),
489 N_("--thread-count-initial COUNT"), TWO_DASHES
,
490 &General_options::set_thread_count_initial
),
491 GENERAL_ARG('\0', "thread-count-middle",
492 N_("Number of threads to use in middle pass"),
493 N_("--thread-count-middle COUNT"), TWO_DASHES
,
494 &General_options::set_thread_count_middle
),
495 GENERAL_ARG('\0', "thread-count-final",
496 N_("Number of threads to use in final pass"),
497 N_("--thread-count-final COUNT"), TWO_DASHES
,
498 &General_options::set_thread_count_final
),
499 POSDEP_NOARG('\0', "whole-archive",
500 N_("Include all archive contents"),
502 &Position_dependent_options::set_whole_archive
),
503 POSDEP_NOARG('\0', "no-whole-archive",
504 N_("Include only needed archive contents"),
506 &Position_dependent_options::clear_whole_archive
),
508 GENERAL_ARG('z', NULL
,
509 N_("Subcommands as follows:\n\
510 -z execstack Mark output as requiring executable stack\n\
511 -z noexecstack Mark output as not requiring executable stack"),
512 N_("-z SUBCOMMAND"), ONE_DASH
,
513 &General_options::handle_z_option
),
515 SPECIAL('(', "start-group", N_("Start a library search group"), NULL
,
516 TWO_DASHES
, &start_group
),
517 SPECIAL(')', "end-group", N_("End a library search group"), NULL
,
518 TWO_DASHES
, &end_group
),
519 SPECIAL('\0', "help", N_("Report usage information"), NULL
,
521 SPECIAL('v', "version", N_("Report version information"), NULL
,
522 TWO_DASHES
, &version
),
523 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task,script)"),
524 N_("--debug=TYPE"), TWO_DASHES
,
525 &General_options::handle_debug_option
)
528 const int options::Command_line_options::options_size
=
529 sizeof (options
) / sizeof (options
[0]);
533 const options::One_z_option
534 options::Command_line_options::z_options
[] =
536 { "execstack", &General_options::set_execstack
},
537 { "noexecstack", &General_options::set_noexecstack
},
540 const int options::Command_line_options::z_options_size
=
541 sizeof(z_options
) / sizeof(z_options
[0]);
543 // The --debug options.
545 const options::One_debug_option
546 options::Command_line_options::debug_options
[] =
548 { "all", DEBUG_ALL
},
549 { "task", DEBUG_TASK
},
550 { "script", DEBUG_SCRIPT
}
553 const int options::Command_line_options::debug_options_size
=
554 sizeof(debug_options
) / sizeof(debug_options
[0]);
556 // The default values for the general options.
558 General_options::General_options(Script_options
* script_options
)
559 : export_dynamic_(false),
561 dynamic_linker_(NULL
),
563 optimization_level_(0),
564 output_file_name_("a.out"),
565 is_relocatable_(false),
567 allow_shlib_undefined_(false),
569 compress_debug_sections_(NO_COMPRESSION
),
570 detect_odr_violations_(false),
571 create_eh_frame_hdr_(false),
578 text_segment_address_(-1U), // -1 indicates value not set by user
580 thread_count_initial_(0),
581 thread_count_middle_(0),
582 thread_count_final_(0),
583 execstack_(EXECSTACK_FROM_INPUT
),
585 script_options_(script_options
)
587 // We initialize demangle_ based on the environment variable
588 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
589 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
590 // environment. Acting the same way here lets us provide the same
591 // interface by default.
592 this->demangle_
= getenv("COLLECT_NO_DEMANGLE") == NULL
;
595 // Handle the --defsym option.
598 General_options::define_symbol(const char* arg
)
600 this->script_options_
->define_symbol(arg
);
603 // Handle the -z option.
606 General_options::handle_z_option(const char* arg
)
608 const int z_options_size
= options::Command_line_options::z_options_size
;
609 const gold::options::One_z_option
* z_options
=
610 gold::options::Command_line_options::z_options
;
611 for (int i
= 0; i
< z_options_size
; ++i
)
613 if (strcmp(arg
, z_options
[i
].name
) == 0)
615 (this->*(z_options
[i
].set
))();
620 fprintf(stderr
, _("%s: unrecognized -z subcommand: %s\n"),
622 ::exit(EXIT_FAILURE
);
625 // Handle the --debug option.
628 General_options::handle_debug_option(const char* arg
)
630 const int debug_options_size
=
631 options::Command_line_options::debug_options_size
;
632 const gold::options::One_debug_option
* debug_options
=
633 options::Command_line_options::debug_options
;
634 for (int i
= 0; i
< debug_options_size
; ++i
)
636 if (strcmp(arg
, debug_options
[i
].name
) == 0)
638 this->set_debug(debug_options
[i
].debug_flags
);
643 fprintf(stderr
, _("%s: unrecognized --debug subcommand: %s\n"),
645 ::exit(EXIT_FAILURE
);
648 // Add the sysroot, if any, to the search paths.
651 General_options::add_sysroot()
653 if (this->sysroot_
.empty())
655 this->sysroot_
= get_default_sysroot();
656 if (this->sysroot_
.empty())
660 const char* sysroot
= this->sysroot_
.c_str();
661 char* canonical_sysroot
= lrealpath(sysroot
);
663 for (Dir_list::iterator p
= this->search_path_
.begin();
664 p
!= this->search_path_
.end();
666 p
->add_sysroot(sysroot
, canonical_sysroot
);
668 free(canonical_sysroot
);
671 // The default values for the position dependent options.
673 Position_dependent_options::Position_dependent_options()
674 : do_static_search_(false),
676 include_whole_archive_(false)
680 // Search_directory methods.
682 // This is called if we have a sysroot. Apply the sysroot if
683 // appropriate. Record whether the directory is in the sysroot.
686 Search_directory::add_sysroot(const char* sysroot
,
687 const char* canonical_sysroot
)
689 gold_assert(*sysroot
!= '\0');
690 if (this->put_in_sysroot_
)
692 if (!IS_DIR_SEPARATOR(this->name_
[0])
693 && !IS_DIR_SEPARATOR(sysroot
[strlen(sysroot
) - 1]))
694 this->name_
= '/' + this->name_
;
695 this->name_
= sysroot
+ this->name_
;
696 this->is_in_sysroot_
= true;
700 // Check whether this entry is in the sysroot. To do this
701 // correctly, we need to use canonical names. Otherwise we will
702 // get confused by the ../../.. paths that gcc tends to use.
703 char* canonical_name
= lrealpath(this->name_
.c_str());
704 int canonical_name_len
= strlen(canonical_name
);
705 int canonical_sysroot_len
= strlen(canonical_sysroot
);
706 if (canonical_name_len
> canonical_sysroot_len
707 && IS_DIR_SEPARATOR(canonical_name
[canonical_sysroot_len
]))
709 canonical_name
[canonical_sysroot_len
] = '\0';
710 if (FILENAME_CMP(canonical_name
, canonical_sysroot
) == 0)
711 this->is_in_sysroot_
= true;
713 free(canonical_name
);
717 // Input_arguments methods.
719 // Add a file to the list.
722 Input_arguments::add_file(const Input_file_argument
& file
)
724 if (!this->in_group_
)
725 this->input_argument_list_
.push_back(Input_argument(file
));
728 gold_assert(!this->input_argument_list_
.empty());
729 gold_assert(this->input_argument_list_
.back().is_group());
730 this->input_argument_list_
.back().group()->add_file(file
);
737 Input_arguments::start_group()
739 gold_assert(!this->in_group_
);
740 Input_file_group
* group
= new Input_file_group();
741 this->input_argument_list_
.push_back(Input_argument(group
));
742 this->in_group_
= true;
748 Input_arguments::end_group()
750 gold_assert(this->in_group_
);
751 this->in_group_
= false;
754 // Command_line options.
756 Command_line::Command_line(Script_options
* script_options
)
757 : options_(script_options
), position_options_(), inputs_()
761 // Process the command line options. For process_one_option,
762 // i is the index of argv to process next, and the return value
763 // is the index of the next option to process (i+1 or i+2, or argc
764 // to indicate processing is done). no_more_options is set to true
765 // if (and when) "--" is seen as an option.
768 Command_line::process_one_option(int argc
, char** argv
, int i
,
769 bool* no_more_options
)
771 const int options_size
= options::Command_line_options::options_size
;
772 const options::One_option
* options
= options::Command_line_options::options
;
773 gold_assert(i
< argc
);
775 if (argv
[i
][0] != '-' || *no_more_options
)
777 this->add_file(argv
[i
], false);
781 // Option starting with '-'.
783 if (argv
[i
][1] == '-')
786 if (argv
[i
][2] == '\0')
788 *no_more_options
= true;
793 // Look for a long option match.
794 char* opt
= argv
[i
] + dashes
;
797 char* arg
= strchr(opt
, '=');
798 bool argument_with_equals
= arg
!= NULL
;
804 else if (i
+ 1 < argc
)
811 for (j
= 0; j
< options_size
; ++j
)
813 if (options
[j
].long_option
!= NULL
816 != options::One_option::EXACTLY_TWO_DASHES
))
817 && first
== options
[j
].long_option
[0]
818 && strcmp(opt
, options
[j
].long_option
) == 0)
820 if (options
[j
].special
)
822 // Restore the '=' we clobbered above.
823 if (arg
!= NULL
&& skiparg
== 0)
825 i
+= options
[j
].special(argc
- i
, argv
+ i
, opt
, true, this);
829 if (!options
[j
].takes_argument())
831 if (argument_with_equals
)
832 this->usage(_("unexpected argument"), argv
[i
]);
839 this->usage(_("missing argument"), argv
[i
]);
841 this->apply_option(options
[j
], arg
);
847 if (j
< options_size
)
850 // If we saw two dashes, we needed to have seen a long option.
852 this->usage(_("unknown option"), argv
[i
]);
854 // Look for a short option match. There may be more than one
855 // short option in a given argument.
857 char* s
= argv
[i
] + 1;
859 while (*s
!= '\0' && !done
)
863 for (j
= 0; j
< options_size
; ++j
)
865 if (options
[j
].short_option
== opt
)
867 if (options
[j
].special
)
869 // Undo the argument skip done above.
871 i
+= options
[j
].special(argc
- i
, argv
+ i
, s
, false,
878 if (options
[j
].takes_argument())
891 this->usage(_("missing argument"), opt
);
893 this->apply_option(options
[j
], arg
);
899 if (j
>= options_size
)
900 this->usage(_("unknown option"), *s
);
909 Command_line::process(int argc
, char** argv
)
911 bool no_more_options
= false;
914 i
= process_one_option(argc
, argv
, i
, &no_more_options
);
916 if (this->inputs_
.in_group())
918 fprintf(stderr
, _("%s: missing group end\n"), program_name
);
922 // FIXME: We should only do this when configured in native mode.
923 this->options_
.add_to_search_path_with_sysroot("/lib");
924 this->options_
.add_to_search_path_with_sysroot("/usr/lib");
926 this->options_
.add_sysroot();
928 // Ensure options don't contradict each other and are otherwise kosher.
929 this->normalize_options();
932 // Extract an option argument for a special option. LONGNAME is the
933 // long name of the option. This sets *PRET to the return value for
934 // the special function handler to skip to the next option.
937 Command_line::get_special_argument(const char* longname
, int argc
, char** argv
,
938 const char* arg
, bool long_option
,
943 size_t longlen
= strlen(longname
);
944 gold_assert(strncmp(arg
, longname
, longlen
) == 0);
953 gold_assert(*arg
== '\0');
972 this->usage(_("missing argument"), arg
);
975 // Ensure options don't contradict each other and are otherwise kosher.
978 Command_line::normalize_options()
980 if (this->options_
.is_shared() && this->options_
.is_relocatable())
981 gold_fatal(_("-shared and -r are incompatible"));
983 // If the user specifies both -s and -r, convert the -s as -S.
984 // -r requires us to keep externally visible symbols!
985 if (this->options_
.strip_all() && this->options_
.is_relocatable())
987 // Clears the strip_all() status, replacing it with strip_debug().
988 this->options_
.set_strip_debug();
991 // FIXME: we can/should be doing a lot more sanity checking here.
995 // Apply a command line option.
998 Command_line::apply_option(const options::One_option
& opt
,
1003 if (opt
.general_noarg
)
1004 (this->options_
.*(opt
.general_noarg
))();
1005 else if (opt
.dependent_noarg
)
1006 (this->position_options_
.*(opt
.dependent_noarg
))();
1012 if (opt
.general_arg
)
1013 (this->options_
.*(opt
.general_arg
))(arg
);
1014 else if (opt
.dependent_arg
)
1015 (this->position_options_
.*(opt
.dependent_arg
))(arg
);
1021 // Add an input file or library.
1024 Command_line::add_file(const char* name
, bool is_lib
)
1026 Input_file_argument
file(name
, is_lib
, "", this->position_options_
);
1027 this->inputs_
.add_file(file
);
1030 // Handle the -l option, which requires special treatment.
1033 Command_line::process_l_option(int argc
, char** argv
, char* arg
,
1037 const char* libname
= this->get_special_argument("library", argc
, argv
, arg
,
1039 this->add_file(libname
, true);
1043 // Handle the --start-group option.
1046 Command_line::start_group(const char* arg
)
1048 if (this->inputs_
.in_group())
1049 this->usage(_("may not nest groups"), arg
);
1050 this->inputs_
.start_group();
1053 // Handle the --end-group option.
1056 Command_line::end_group(const char* arg
)
1058 if (!this->inputs_
.in_group())
1059 this->usage(_("group end without group start"), arg
);
1060 this->inputs_
.end_group();
1063 // Report a usage error. */
1066 Command_line::usage()
1069 _("%s: use the --help option for usage information\n"),
1071 ::exit(EXIT_FAILURE
);
1075 Command_line::usage(const char* msg
, const char *opt
)
1079 program_name
, opt
, msg
);
1084 Command_line::usage(const char* msg
, char opt
)
1088 program_name
, opt
, msg
);
1092 } // End namespace gold.