1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007 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"
37 // The information we keep for a single command line option.
39 struct options::One_option
41 // The single character option name, or '\0' if this is only a long
45 // The long option name, or NULL if this is only a short option.
46 const char* long_option
;
48 // Description of the option for --help output, or NULL if there is none.
51 // How to print the option name in --help output, or NULL to use the
53 const char* help_output
;
55 // Long option dash control. This is ignored if long_option is
59 // Long option normally takes one dash; two dashes are also
62 // Long option normally takes two dashes; one dash is also
65 // Long option always takes two dashes.
69 // Function for special handling, or NULL. Returns the number of
70 // arguments to skip. This will normally be at least 1, but it may
71 // be 0 if this function changes *argv. ARG points to the location
72 // in *ARGV where the option starts, which may be helpful for a
74 int (*special
)(int argc
, char** argv
, char *arg
, bool long_option
,
77 // If this is a position independent option which does not take an
78 // argument, this is the member function to call to record it.
79 void (General_options::*general_noarg
)();
81 // If this is a position independent function which takes an
82 // argument, this is the member function to call to record it.
83 void (General_options::*general_arg
)(const char*);
85 // If this is a position dependent option which does not take an
86 // argument, this is the member function to call to record it.
87 void (Position_dependent_options::*dependent_noarg
)();
89 // If this is a position dependent option which takes an argument,
90 // this is the member function to record it.
91 void (Position_dependent_options::*dependent_arg
)(const char*);
93 // Return whether this option takes an argument.
95 takes_argument() const
96 { return this->general_arg
!= NULL
|| this->dependent_arg
!= NULL
; }
99 // We have a separate table for -z options.
101 struct options::One_z_option
103 // The name of the option.
106 // The member function in General_options called to record it.
107 void (General_options::*set
)();
110 // We have a separate table for --debug options.
112 struct options::One_debug_option
114 // The name of the option.
117 // The flags to turn on.
118 unsigned int debug_flags
;
121 class options::Command_line_options
124 static const One_option options
[];
125 static const int options_size
;
126 static const One_z_option z_options
[];
127 static const int z_options_size
;
128 static const One_debug_option debug_options
[];
129 static const int debug_options_size
;
132 } // End namespace gold.
137 // Handle the special -l option, which adds an input file.
140 library(int argc
, char** argv
, char* arg
, bool long_option
,
141 gold::Command_line
* cmdline
)
143 return cmdline
->process_l_option(argc
, argv
, arg
, long_option
);
146 // Handle the special -T/--script option, which reads a linker script.
149 invoke_script(int argc
, char** argv
, char* arg
, bool long_option
,
150 gold::Command_line
* cmdline
)
153 const char* script_name
= cmdline
->get_special_argument("script", argc
, argv
,
156 if (!read_commandline_script(script_name
, cmdline
))
157 gold::gold_error(_("%s: unable to parse script file %s\n"),
158 gold::program_name
, arg
);
162 // Handle the special --start-group option.
165 start_group(int, char**, char* arg
, bool, gold::Command_line
* cmdline
)
167 cmdline
->start_group(arg
);
171 // Handle the special --end-group option.
174 end_group(int, char**, char* arg
, bool, gold::Command_line
* cmdline
)
176 cmdline
->end_group(arg
);
180 // Report usage information for ld --help, and exit.
183 help(int, char**, char*, bool, gold::Command_line
*)
185 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name
);
187 const int options_size
= gold::options::Command_line_options::options_size
;
188 const gold::options::One_option
* options
=
189 gold::options::Command_line_options::options
;
190 for (int i
= 0; i
< options_size
; ++i
)
192 if (options
[i
].doc
== NULL
)
202 if (options
[j
].help_output
!= NULL
)
209 printf(options
[j
].help_output
);
210 len
+= std::strlen(options
[i
].help_output
);
215 if (options
[j
].short_option
!= '\0')
222 printf("-%c", options
[j
].short_option
);
227 if (options
[j
].long_option
!= NULL
)
234 if (options
[j
].dash
== gold::options::One_option::ONE_DASH
)
244 printf("%s", options
[j
].long_option
);
245 len
+= std::strlen(options
[j
].long_option
);
251 while (j
< options_size
&& options
[j
].doc
== NULL
);
258 for (; len
< 30; ++len
)
261 std::puts(options
[i
].doc
);
264 ::exit(EXIT_SUCCESS
);
269 // Report version information.
272 version(int, char**, char* opt
, bool, gold::Command_line
*)
274 gold::print_version(opt
[0] == 'v' && opt
[1] == '\0');
275 ::exit(EXIT_SUCCESS
);
279 // If the default sysroot is relocatable, try relocating it based on
283 get_relative_sysroot(const char* from
)
285 char* path
= make_relative_prefix(gold::program_name
, from
,
290 if (::stat(path
, &s
) == 0 && S_ISDIR(s
.st_mode
))
298 // Return the default sysroot. This is set by the --with-sysroot
299 // option to configure.
302 get_default_sysroot()
304 const char* sysroot
= TARGET_SYSTEM_ROOT
;
305 if (*sysroot
== '\0')
308 if (TARGET_SYSTEM_ROOT_RELOCATABLE
)
310 char* path
= get_relative_sysroot (BINDIR
);
312 path
= get_relative_sysroot (TOOLBINDIR
);
315 std::string ret
= path
;
324 } // End anonymous namespace.
329 // Helper macros used to specify the options. We could also do this
330 // using constructors, but then g++ would generate code to initialize
331 // the array. We want the array to be initialized statically so that
332 // we get better startup time.
334 #define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
335 { short_option, long_option, doc, help, options::One_option::dash, \
336 NULL, func, NULL, NULL, NULL }
337 #define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
338 { short_option, long_option, doc, help, options::One_option::dash, \
339 NULL, NULL, func, NULL, NULL }
340 #define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
341 { short_option, long_option, doc, help, options::One_option::dash, \
342 NULL, NULL, NULL, func, NULL }
343 #define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
344 { short_option, long_option, doc, help, options::One_option::dash, \
345 NULL, NULL, NULL, NULL, func }
346 #define SPECIAL(short_option, long_option, doc, help, dash, func) \
347 { short_option, long_option, doc, help, options::One_option::dash, \
348 func, NULL, NULL, NULL, NULL }
350 // Here is the actual list of options which we accept.
352 const options::One_option
353 options::Command_line_options::options
[] =
355 GENERAL_NOARG('\0', "allow-shlib-undefined",
356 N_("Allow unresolved references in shared libraries"),
358 &General_options::set_allow_shlib_undefined
),
359 GENERAL_NOARG('\0', "no-allow-shlib-undefined",
360 N_("Do not allow unresolved references in shared libraries"),
362 &General_options::set_no_allow_shlib_undefined
),
363 POSDEP_NOARG('\0', "as-needed",
364 N_("Only set DT_NEEDED for dynamic libs if used"),
365 NULL
, TWO_DASHES
, &Position_dependent_options::set_as_needed
),
366 POSDEP_NOARG('\0', "no-as-needed",
367 N_("Always DT_NEEDED for dynamic libs (default)"),
368 NULL
, TWO_DASHES
, &Position_dependent_options::clear_as_needed
),
369 POSDEP_NOARG('\0', "Bdynamic",
370 N_("-l searches for shared libraries"),
372 &Position_dependent_options::set_dynamic_search
),
373 POSDEP_NOARG('\0', "Bstatic",
374 N_("-l does not search for shared libraries"),
376 &Position_dependent_options::set_static_search
),
377 GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
378 NULL
, ONE_DASH
, &General_options::set_symbolic
),
380 # define ZLIB_STR ",zlib"
384 GENERAL_ARG('\0', "compress-debug-sections",
385 N_("Compress .debug_* sections in the output file "
386 "(default is none)"),
387 N_("--compress-debug-sections=[none" ZLIB_STR
"]"),
389 &General_options::set_compress_debug_sections
),
390 GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
391 NULL
, TWO_DASHES
, &General_options::set_demangle
),
392 GENERAL_NOARG('\0', "no-demangle",
393 N_("Do not demangle C++ symbols in log messages"),
394 NULL
, TWO_DASHES
, &General_options::clear_demangle
),
395 GENERAL_NOARG('\0', "detect-odr-violations",
396 N_("Try to detect violations of the One Definition Rule"),
397 NULL
, TWO_DASHES
, &General_options::set_detect_odr_violations
),
398 GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
399 NULL
, TWO_DASHES
, &General_options::set_export_dynamic
),
400 GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
401 NULL
, TWO_DASHES
, &General_options::set_create_eh_frame_hdr
),
402 GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
403 N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES
,
404 &General_options::set_dynamic_linker
),
405 SPECIAL('l', "library", N_("Search for library LIBNAME"),
406 N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES
,
408 GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
409 N_("-L DIR, --library-path DIR"), TWO_DASHES
,
410 &General_options::add_to_search_path
),
411 GENERAL_ARG('m', NULL
, N_("Ignored for compatibility"), NULL
, ONE_DASH
,
412 &General_options::ignore
),
413 GENERAL_ARG('o', "output", N_("Set output file name"),
414 N_("-o FILE, --output FILE"), TWO_DASHES
,
415 &General_options::set_output_file_name
),
416 GENERAL_ARG('O', NULL
, N_("Optimize output file size"),
417 N_("-O level"), ONE_DASH
,
418 &General_options::set_optimization_level
),
419 GENERAL_NOARG('r', NULL
, N_("Generate relocatable output"), NULL
,
420 ONE_DASH
, &General_options::set_relocatable
),
421 GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
422 N_("-R DIR, -rpath DIR"), ONE_DASH
,
423 &General_options::add_to_rpath
),
424 GENERAL_ARG('\0', "rpath-link",
425 N_("Add DIR to link time shared library search path"),
426 N_("--rpath-link DIR"), TWO_DASHES
,
427 &General_options::add_to_rpath_link
),
428 GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL
,
429 TWO_DASHES
, &General_options::set_strip_all
),
430 GENERAL_NOARG('\0', "strip-debug-gdb",
431 N_("Strip debug symbols that are unused by gdb "
432 "(at least versions <= 6.7)"),
433 NULL
, TWO_DASHES
, &General_options::set_strip_debug_gdb
),
434 // This must come after -Sdebug since it's a prefix of it.
435 GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL
,
436 TWO_DASHES
, &General_options::set_strip_debug
),
437 GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
438 NULL
, ONE_DASH
, &General_options::set_shared
),
439 GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
440 NULL
, ONE_DASH
, &General_options::set_static
),
441 GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
442 NULL
, TWO_DASHES
, &General_options::set_stats
),
443 GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
444 N_("--sysroot DIR"), TWO_DASHES
, &General_options::set_sysroot
),
445 GENERAL_ARG('\0', "Ttext", N_("Set the address of the .text section"),
446 N_("-Ttext ADDRESS"), ONE_DASH
,
447 &General_options::set_text_segment_address
),
448 // This must come after -Ttext since it's a prefix of it.
449 SPECIAL('T', "script", N_("Read linker script"),
450 N_("-T FILE, --script FILE"), TWO_DASHES
,
452 GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
453 NULL
, TWO_DASHES
, &General_options::set_threads
),
454 GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
455 NULL
, TWO_DASHES
, &General_options::clear_threads
),
456 GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
457 N_("--thread-count COUNT"), TWO_DASHES
,
458 &General_options::set_thread_count
),
459 GENERAL_ARG('\0', "thread-count-initial",
460 N_("Number of threads to use in initial pass"),
461 N_("--thread-count-initial COUNT"), TWO_DASHES
,
462 &General_options::set_thread_count_initial
),
463 GENERAL_ARG('\0', "thread-count-middle",
464 N_("Number of threads to use in middle pass"),
465 N_("--thread-count-middle COUNT"), TWO_DASHES
,
466 &General_options::set_thread_count_middle
),
467 GENERAL_ARG('\0', "thread-count-final",
468 N_("Number of threads to use in final pass"),
469 N_("--thread-count-final COUNT"), TWO_DASHES
,
470 &General_options::set_thread_count_final
),
471 POSDEP_NOARG('\0', "whole-archive",
472 N_("Include all archive contents"),
474 &Position_dependent_options::set_whole_archive
),
475 POSDEP_NOARG('\0', "no-whole-archive",
476 N_("Include only needed archive contents"),
478 &Position_dependent_options::clear_whole_archive
),
480 GENERAL_ARG('z', NULL
,
481 N_("Subcommands as follows:\n\
482 -z execstack Mark output as requiring executable stack\n\
483 -z noexecstack Mark output as not requiring executable stack"),
484 N_("-z SUBCOMMAND"), ONE_DASH
,
485 &General_options::handle_z_option
),
487 SPECIAL('(', "start-group", N_("Start a library search group"), NULL
,
488 TWO_DASHES
, &start_group
),
489 SPECIAL(')', "end-group", N_("End a library search group"), NULL
,
490 TWO_DASHES
, &end_group
),
491 SPECIAL('\0', "help", N_("Report usage information"), NULL
,
493 SPECIAL('v', "version", N_("Report version information"), NULL
,
494 TWO_DASHES
, &version
),
495 GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task)"),
496 N_("--debug=TYPE"), TWO_DASHES
,
497 &General_options::handle_debug_option
)
500 const int options::Command_line_options::options_size
=
501 sizeof (options
) / sizeof (options
[0]);
505 const options::One_z_option
506 options::Command_line_options::z_options
[] =
508 { "execstack", &General_options::set_execstack
},
509 { "noexecstack", &General_options::set_noexecstack
},
512 const int options::Command_line_options::z_options_size
=
513 sizeof(z_options
) / sizeof(z_options
[0]);
515 // The --debug options.
517 const options::One_debug_option
518 options::Command_line_options::debug_options
[] =
520 { "all", DEBUG_ALL
},
521 { "task", DEBUG_TASK
},
524 const int options::Command_line_options::debug_options_size
=
525 sizeof(debug_options
) / sizeof(debug_options
[0]);
527 // The default values for the general options.
529 General_options::General_options()
530 : export_dynamic_(false),
531 dynamic_linker_(NULL
),
533 optimization_level_(0),
534 output_file_name_("a.out"),
535 is_relocatable_(false),
537 allow_shlib_undefined_(false),
539 compress_debug_sections_(NO_COMPRESSION
),
540 detect_odr_violations_(false),
541 create_eh_frame_hdr_(false),
548 text_segment_address_(-1U), // -1 indicates value not set by user
550 thread_count_initial_(0),
551 thread_count_middle_(0),
552 thread_count_final_(0),
553 execstack_(EXECSTACK_FROM_INPUT
),
556 // We initialize demangle_ based on the environment variable
557 // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
558 // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
559 // environment. Acting the same way here lets us provide the same
560 // interface by default.
561 this->demangle_
= getenv("COLLECT_NO_DEMANGLE") == NULL
;
564 // The default values for the position dependent options.
566 Position_dependent_options::Position_dependent_options()
567 : do_static_search_(false),
569 include_whole_archive_(false)
573 // Handle the -z option.
576 General_options::handle_z_option(const char* arg
)
578 const int z_options_size
= options::Command_line_options::z_options_size
;
579 const gold::options::One_z_option
* z_options
=
580 gold::options::Command_line_options::z_options
;
581 for (int i
= 0; i
< z_options_size
; ++i
)
583 if (strcmp(arg
, z_options
[i
].name
) == 0)
585 (this->*(z_options
[i
].set
))();
590 fprintf(stderr
, _("%s: unrecognized -z subcommand: %s\n"),
592 ::exit(EXIT_FAILURE
);
595 // Handle the --debug option.
598 General_options::handle_debug_option(const char* arg
)
600 const int debug_options_size
=
601 options::Command_line_options::debug_options_size
;
602 const gold::options::One_debug_option
* debug_options
=
603 options::Command_line_options::debug_options
;
604 for (int i
= 0; i
< debug_options_size
; ++i
)
606 if (strcmp(arg
, debug_options
[i
].name
) == 0)
608 this->set_debug(debug_options
[i
].debug_flags
);
613 fprintf(stderr
, _("%s: unrecognized --debug subcommand: %s\n"),
615 ::exit(EXIT_FAILURE
);
618 // Add the sysroot, if any, to the search paths.
621 General_options::add_sysroot()
623 if (this->sysroot_
.empty())
625 this->sysroot_
= get_default_sysroot();
626 if (this->sysroot_
.empty())
630 const char* sysroot
= this->sysroot_
.c_str();
631 char* canonical_sysroot
= lrealpath(sysroot
);
633 for (Dir_list::iterator p
= this->search_path_
.begin();
634 p
!= this->search_path_
.end();
636 p
->add_sysroot(sysroot
, canonical_sysroot
);
638 free(canonical_sysroot
);
641 // Search_directory methods.
643 // This is called if we have a sysroot. Apply the sysroot if
644 // appropriate. Record whether the directory is in the sysroot.
647 Search_directory::add_sysroot(const char* sysroot
,
648 const char* canonical_sysroot
)
650 gold_assert(*sysroot
!= '\0');
651 if (this->put_in_sysroot_
)
653 if (!IS_DIR_SEPARATOR(this->name_
[0])
654 && !IS_DIR_SEPARATOR(sysroot
[strlen(sysroot
) - 1]))
655 this->name_
= '/' + this->name_
;
656 this->name_
= sysroot
+ this->name_
;
657 this->is_in_sysroot_
= true;
661 // Check whether this entry is in the sysroot. To do this
662 // correctly, we need to use canonical names. Otherwise we will
663 // get confused by the ../../.. paths that gcc tends to use.
664 char* canonical_name
= lrealpath(this->name_
.c_str());
665 int canonical_name_len
= strlen(canonical_name
);
666 int canonical_sysroot_len
= strlen(canonical_sysroot
);
667 if (canonical_name_len
> canonical_sysroot_len
668 && IS_DIR_SEPARATOR(canonical_name
[canonical_sysroot_len
]))
670 canonical_name
[canonical_sysroot_len
] = '\0';
671 if (FILENAME_CMP(canonical_name
, canonical_sysroot
) == 0)
672 this->is_in_sysroot_
= true;
674 free(canonical_name
);
678 // Input_arguments methods.
680 // Add a file to the list.
683 Input_arguments::add_file(const Input_file_argument
& file
)
685 if (!this->in_group_
)
686 this->input_argument_list_
.push_back(Input_argument(file
));
689 gold_assert(!this->input_argument_list_
.empty());
690 gold_assert(this->input_argument_list_
.back().is_group());
691 this->input_argument_list_
.back().group()->add_file(file
);
698 Input_arguments::start_group()
700 gold_assert(!this->in_group_
);
701 Input_file_group
* group
= new Input_file_group();
702 this->input_argument_list_
.push_back(Input_argument(group
));
703 this->in_group_
= true;
709 Input_arguments::end_group()
711 gold_assert(this->in_group_
);
712 this->in_group_
= false;
715 // Command_line options.
717 Command_line::Command_line()
718 : options_(), position_options_(), inputs_()
722 // Process the command line options. For process_one_option,
723 // i is the index of argv to process next, and the return value
724 // is the index of the next option to process (i+1 or i+2, or argc
725 // to indicate processing is done). no_more_options is set to true
726 // if (and when) "--" is seen as an option.
729 Command_line::process_one_option(int argc
, char** argv
, int i
,
730 bool* no_more_options
)
732 const int options_size
= options::Command_line_options::options_size
;
733 const options::One_option
* options
= options::Command_line_options::options
;
734 gold_assert(i
< argc
);
736 if (argv
[i
][0] != '-' || *no_more_options
)
738 this->add_file(argv
[i
], false);
742 // Option starting with '-'.
744 if (argv
[i
][1] == '-')
747 if (argv
[i
][2] == '\0')
749 *no_more_options
= true;
754 // Look for a long option match.
755 char* opt
= argv
[i
] + dashes
;
758 char* arg
= strchr(opt
, '=');
759 bool argument_with_equals
= arg
!= NULL
;
765 else if (i
+ 1 < argc
)
772 for (j
= 0; j
< options_size
; ++j
)
774 if (options
[j
].long_option
!= NULL
777 != options::One_option::EXACTLY_TWO_DASHES
))
778 && first
== options
[j
].long_option
[0]
779 && strcmp(opt
, options
[j
].long_option
) == 0)
781 if (options
[j
].special
)
783 // Restore the '=' we clobbered above.
784 if (arg
!= NULL
&& skiparg
== 0)
786 i
+= options
[j
].special(argc
- i
, argv
+ i
, opt
, true, this);
790 if (!options
[j
].takes_argument())
792 if (argument_with_equals
)
793 this->usage(_("unexpected argument"), argv
[i
]);
800 this->usage(_("missing argument"), argv
[i
]);
802 this->apply_option(options
[j
], arg
);
808 if (j
< options_size
)
811 // If we saw two dashes, we needed to have seen a long option.
813 this->usage(_("unknown option"), argv
[i
]);
815 // Look for a short option match. There may be more than one
816 // short option in a given argument.
818 char* s
= argv
[i
] + 1;
820 while (*s
!= '\0' && !done
)
824 for (j
= 0; j
< options_size
; ++j
)
826 if (options
[j
].short_option
== opt
)
828 if (options
[j
].special
)
830 // Undo the argument skip done above.
832 i
+= options
[j
].special(argc
- i
, argv
+ i
, s
, false,
839 if (options
[j
].takes_argument())
852 this->usage(_("missing argument"), opt
);
854 this->apply_option(options
[j
], arg
);
860 if (j
>= options_size
)
861 this->usage(_("unknown option"), *s
);
870 Command_line::process(int argc
, char** argv
)
872 bool no_more_options
= false;
875 i
= process_one_option(argc
, argv
, i
, &no_more_options
);
877 if (this->inputs_
.in_group())
879 fprintf(stderr
, _("%s: missing group end\n"), program_name
);
883 // FIXME: We should only do this when configured in native mode.
884 this->options_
.add_to_search_path_with_sysroot("/lib");
885 this->options_
.add_to_search_path_with_sysroot("/usr/lib");
887 this->options_
.add_sysroot();
889 // Ensure options don't contradict each other and are otherwise kosher.
890 this->normalize_options();
893 // Extract an option argument for a special option. LONGNAME is the
894 // long name of the option. This sets *PRET to the return value for
895 // the special function handler to skip to the next option.
898 Command_line::get_special_argument(const char* longname
, int argc
, char** argv
,
899 const char* arg
, bool long_option
,
904 size_t longlen
= strlen(longname
);
905 gold_assert(strncmp(arg
, longname
, longlen
) == 0);
914 gold_assert(*arg
== '\0');
933 this->usage(_("missing argument"), arg
);
936 // Ensure options don't contradict each other and are otherwise kosher.
939 Command_line::normalize_options()
941 // If the user specifies both -s and -r, convert the -s as -S.
942 // -r requires us to keep externally visible symbols!
943 if (this->options_
.strip_all() && this->options_
.is_relocatable())
945 // Clears the strip_all() status, replacing it with strip_debug().
946 this->options_
.set_strip_debug();
949 // FIXME: we can/should be doing a lot more sanity checking here.
953 // Apply a command line option.
956 Command_line::apply_option(const options::One_option
& opt
,
961 if (opt
.general_noarg
)
962 (this->options_
.*(opt
.general_noarg
))();
963 else if (opt
.dependent_noarg
)
964 (this->position_options_
.*(opt
.dependent_noarg
))();
971 (this->options_
.*(opt
.general_arg
))(arg
);
972 else if (opt
.dependent_arg
)
973 (this->position_options_
.*(opt
.dependent_arg
))(arg
);
979 // Add an input file or library.
982 Command_line::add_file(const char* name
, bool is_lib
)
984 Input_file_argument
file(name
, is_lib
, "", this->position_options_
);
985 this->inputs_
.add_file(file
);
988 // Handle the -l option, which requires special treatment.
991 Command_line::process_l_option(int argc
, char** argv
, char* arg
,
995 const char* libname
= this->get_special_argument("library", argc
, argv
, arg
,
997 this->add_file(libname
, true);
1001 // Handle the --start-group option.
1004 Command_line::start_group(const char* arg
)
1006 if (this->inputs_
.in_group())
1007 this->usage(_("may not nest groups"), arg
);
1008 this->inputs_
.start_group();
1011 // Handle the --end-group option.
1014 Command_line::end_group(const char* arg
)
1016 if (!this->inputs_
.in_group())
1017 this->usage(_("group end without group start"), arg
);
1018 this->inputs_
.end_group();
1021 // Report a usage error. */
1024 Command_line::usage()
1027 _("%s: use the --help option for usage information\n"),
1029 ::exit(EXIT_FAILURE
);
1033 Command_line::usage(const char* msg
, const char *opt
)
1037 program_name
, opt
, msg
);
1042 Command_line::usage(const char* msg
, char opt
)
1046 program_name
, opt
, msg
);
1050 } // End namespace gold.