1 // options.h -- handle command line options for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008, 2009 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.
23 // General_options (from Command_line::options())
24 // All the options (a.k.a. command-line flags)
25 // Input_argument (from Command_line::inputs())
26 // The list of input files, including -l options.
28 // Everything we get from the command line -- the General_options
29 // plus the Input_arguments.
31 // There are also some smaller classes, such as
32 // Position_dependent_options which hold a subset of General_options
33 // that change as options are parsed (as opposed to the usual behavior
34 // of the last instance of that option specified on the commandline wins).
36 #ifndef GOLD_OPTIONS_H
37 #define GOLD_OPTIONS_H
52 class General_options;
53 class Search_directory;
54 class Input_file_group;
55 class Position_dependent_options;
59 // Incremental build action for a specific file, as selected by the user.
61 enum Incremental_disposition
63 // Determine the status from the timestamp (default).
65 // Assume the file changed from the previous build.
67 // Assume the file didn't change from the previous build.
71 // The nested namespace is to contain all the global variables and
72 // structs that need to be defined in the .h file, but do not need to
73 // be used outside this class.
76 typedef std::vector<Search_directory> Dir_list;
77 typedef Unordered_set<std::string> String_set;
79 // These routines convert from a string option to various types.
80 // Each gives a fatal error if it cannot parse the argument.
83 parse_bool(const char* option_name, const char* arg, bool* retval);
86 parse_int(const char* option_name, const char* arg, int* retval);
89 parse_uint(const char* option_name, const char* arg, int* retval);
92 parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
95 parse_double(const char* option_name, const char* arg, double* retval);
98 parse_string(const char* option_name, const char* arg, const char** retval);
101 parse_optional_string(const char* option_name, const char* arg,
102 const char** retval);
105 parse_dirlist(const char* option_name, const char* arg, Dir_list* retval);
108 parse_set(const char* option_name, const char* arg, String_set* retval);
111 parse_choices(const char* option_name, const char* arg, const char** retval,
112 const char* choices[], int num_choices);
116 // Most options have both a shortname (one letter) and a longname.
117 // This enum controls how many dashes are expected for longname access
118 // -- shortnames always use one dash. Most longnames will accept
119 // either one dash or two; the only difference between ONE_DASH and
120 // TWO_DASHES is how we print the option in --help. However, some
121 // longnames require two dashes, and some require only one. The
122 // special value DASH_Z means that the option is preceded by "-z".
125 ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z
128 // LONGNAME is the long-name of the option with dashes converted to
129 // underscores, or else the short-name if the option has no long-name.
130 // It is never the empty string.
131 // DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
132 // SHORTNAME is the short-name of the option, as a char, or '\0' if the
133 // option has no short-name. If the option has no long-name, you
134 // should specify the short-name in *both* VARNAME and here.
135 // DEFAULT_VALUE is the value of the option if not specified on the
136 // commandline, as a string.
137 // HELPSTRING is the descriptive text used with the option via --help
138 // HELPARG is how you define the argument to the option.
139 // --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
140 // HELPARG should be NULL iff the option is a bool and takes no arg.
141 // OPTIONAL_ARG is true if this option takes an optional argument. An
142 // optional argument must be specifid as --OPTION=VALUE, not
144 // READER provides parse_to_value, which is a function that will convert
145 // a char* argument into the proper type and store it in some variable.
146 // A One_option struct initializes itself with the global list of options
147 // at constructor time, so be careful making one of these.
150 std::string longname;
153 const char* default_value;
154 const char* helpstring;
159 One_option(const char* ln, Dashes d, char sn, const char* dv,
160 const char* hs, const char* ha, bool oa, Struct_var* r)
161 : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""),
162 helpstring(hs), helparg(ha), optional_arg(oa), reader(r)
164 // In longname, we convert all underscores to dashes, since GNU
165 // style uses dashes in option names. longname is likely to have
166 // underscores in it because it's also used to declare a C++
168 const char* pos = strchr(this->longname.c_str(), '_');
169 for (; pos; pos = strchr(pos, '_'))
170 this->longname[pos - this->longname.c_str()] = '-';
172 // We only register ourselves if our helpstring is not NULL. This
173 // is to support the "no-VAR" boolean variables, which we
174 // conditionally turn on by defining "no-VAR" help text.
175 if (this->helpstring)
176 this->register_option();
179 // This option takes an argument iff helparg is not NULL.
181 takes_argument() const
182 { return this->helparg != NULL; }
184 // Whether the argument is optional.
186 takes_optional_argument() const
187 { return this->optional_arg; }
189 // Register this option with the global list of options.
193 // Print this option to stdout (used with --help).
198 // All options have a Struct_##varname that inherits from this and
199 // actually implements parse_to_value for that option.
202 // OPTION: the name of the option as specified on the commandline,
203 // including leading dashes, and any text following the option:
204 // "-O", "--defsym=mysym=0x1000", etc.
205 // ARG: the arg associated with this option, or NULL if the option
206 // takes no argument: "2", "mysym=0x1000", etc.
207 // CMDLINE: the global Command_line object. Used by DEFINE_special.
208 // OPTIONS: the global General_options object. Used by DEFINE_special.
210 parse_to_value(const char* option, const char* arg,
211 Command_line* cmdline, General_options* options) = 0;
213 ~Struct_var() // To make gcc happy.
217 // This is for "special" options that aren't of any predefined type.
218 struct Struct_special : public Struct_var
220 // If you change this, change the parse-fn in DEFINE_special as well.
221 typedef void (General_options::*Parse_function)(const char*, const char*,
223 Struct_special(const char* varname, Dashes dashes, char shortname,
224 Parse_function parse_function,
225 const char* helpstring, const char* helparg)
226 : option(varname, dashes, shortname, "", helpstring, helparg, false, this),
227 parse(parse_function)
230 void parse_to_value(const char* option, const char* arg,
231 Command_line* cmdline, General_options* options)
232 { (options->*(this->parse))(option, arg, cmdline); }
235 Parse_function parse;
238 } // End namespace options.
241 // These are helper macros use by DEFINE_uint64/etc below.
242 // This macro is used inside the General_options_ class, so defines
243 // var() and set_var() as General_options methods. Arguments as are
244 // for the constructor for One_option. param_type__ is the same as
245 // type__ for built-in types, and "const type__ &" otherwise.
246 #define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
247 default_value_as_string__, helpstring__, helparg__, \
248 optional_arg__, type__, param_type__, parse_fn__) \
252 { return this->varname__##_.value; } \
255 user_set_##varname__() const \
256 { return this->varname__##_.user_set_via_option; } \
259 set_user_set_##varname__() \
260 { this->varname__##_.user_set_via_option = true; } \
263 struct Struct_##varname__ : public options::Struct_var \
265 Struct_##varname__() \
266 : option(#varname__, dashes__, shortname__, default_value_as_string__, \
267 helpstring__, helparg__, optional_arg__, this), \
268 user_set_via_option(false), value(default_value__) \
272 parse_to_value(const char* option_name, const char* arg, \
273 Command_line*, General_options*) \
275 parse_fn__(option_name, arg, &this->value); \
276 this->user_set_via_option = true; \
279 options::One_option option; \
280 bool user_set_via_option; \
283 Struct_##varname__ varname__##_; \
285 set_##varname__(param_type__ value) \
286 { this->varname__##_.value = value; }
288 // These macros allow for easy addition of a new commandline option.
290 // If no_helpstring__ is not NULL, then in addition to creating
291 // VARNAME, we also create an option called no-VARNAME (or, for a -z
292 // option, noVARNAME).
293 #define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
294 helpstring__, no_helpstring__) \
295 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
296 default_value__ ? "true" : "false", helpstring__, NULL, \
297 false, bool, bool, options::parse_bool) \
298 struct Struct_no_##varname__ : public options::Struct_var \
300 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
302 : "no-" #varname__), \
304 default_value__ ? "false" : "true", \
305 no_helpstring__, NULL, false, this) \
309 parse_to_value(const char*, const char*, \
310 Command_line*, General_options* options) \
311 { options->set_##varname__(false); } \
313 options::One_option option; \
315 Struct_no_##varname__ no_##varname__##_initializer_
317 #define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
318 helpstring__, no_helpstring__) \
319 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
320 default_value__ ? "true" : "false", helpstring__, NULL, \
321 false, bool, bool, options::parse_bool) \
322 struct Struct_disable_##varname__ : public options::Struct_var \
324 Struct_disable_##varname__() : option("disable-" #varname__, \
326 default_value__ ? "false" : "true", \
327 no_helpstring__, NULL, false, this) \
331 parse_to_value(const char*, const char*, \
332 Command_line*, General_options* options) \
333 { options->set_enable_##varname__(false); } \
335 options::One_option option; \
337 Struct_disable_##varname__ disable_##varname__##_initializer_
339 #define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
340 helpstring__, helparg__) \
341 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
342 #default_value__, helpstring__, helparg__, false, \
343 int, int, options::parse_int)
345 #define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
346 helpstring__, helparg__) \
347 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
348 #default_value__, helpstring__, helparg__, false, \
349 int, int, options::parse_uint)
351 #define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
352 helpstring__, helparg__) \
353 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
354 #default_value__, helpstring__, helparg__, false, \
355 uint64_t, uint64_t, options::parse_uint64)
357 #define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
358 helpstring__, helparg__) \
359 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
360 #default_value__, helpstring__, helparg__, false, \
361 double, double, options::parse_double)
363 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
364 helpstring__, helparg__) \
365 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
366 default_value__, helpstring__, helparg__, false, \
367 const char*, const char*, options::parse_string)
369 // This is like DEFINE_string, but we convert each occurrence to a
370 // Search_directory and store it in a vector. Thus we also have the
371 // add_to_VARNAME() method, to append to the vector.
372 #define DEFINE_dirlist(varname__, dashes__, shortname__, \
373 helpstring__, helparg__) \
374 DEFINE_var(varname__, dashes__, shortname__, , \
375 "", helpstring__, helparg__, false, options::Dir_list, \
376 const options::Dir_list&, options::parse_dirlist) \
378 add_to_##varname__(const char* new_value) \
379 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
381 add_search_directory_to_##varname__(const Search_directory& dir) \
382 { this->varname__##_.value.push_back(dir); }
384 // This is like DEFINE_string, but we store a set of strings.
385 #define DEFINE_set(varname__, dashes__, shortname__, \
386 helpstring__, helparg__) \
387 DEFINE_var(varname__, dashes__, shortname__, , \
388 "", helpstring__, helparg__, false, options::String_set, \
389 const options::String_set&, options::parse_set) \
392 any_##varname__() const \
393 { return !this->varname__##_.value.empty(); } \
396 is_##varname__(const char* symbol) const \
398 return (!this->varname__##_.value.empty() \
399 && (this->varname__##_.value.find(std::string(symbol)) \
400 != this->varname__##_.value.end())); \
403 options::String_set::const_iterator \
404 varname__##_begin() const \
405 { return this->varname__##_.value.begin(); } \
407 options::String_set::const_iterator \
408 varname__##_end() const \
409 { return this->varname__##_.value.end(); }
411 // When you have a list of possible values (expressed as string)
412 // After helparg__ should come an initializer list, like
413 // {"foo", "bar", "baz"}
414 #define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
415 helpstring__, helparg__, ...) \
416 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
417 default_value__, helpstring__, helparg__, false, \
418 const char*, const char*, parse_choices_##varname__) \
420 static void parse_choices_##varname__(const char* option_name, \
422 const char** retval) { \
423 const char* choices[] = __VA_ARGS__; \
424 options::parse_choices(option_name, arg, retval, \
425 choices, sizeof(choices) / sizeof(*choices)); \
428 // This is like DEFINE_bool, but VARNAME is the name of a different
429 // option. This option becomes an alias for that one. INVERT is true
430 // if this option is an inversion of the other one.
431 #define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
432 helpstring__, no_helpstring__, invert__) \
434 struct Struct_##option__ : public options::Struct_var \
436 Struct_##option__() \
437 : option(#option__, dashes__, shortname__, "", helpstring__, \
442 parse_to_value(const char*, const char*, \
443 Command_line*, General_options* options) \
445 options->set_##varname__(!invert__); \
446 options->set_user_set_##varname__(); \
449 options::One_option option; \
451 Struct_##option__ option__##_; \
453 struct Struct_no_##option__ : public options::Struct_var \
455 Struct_no_##option__() \
456 : option((dashes__ == options::DASH_Z \
458 : "no-" #option__), \
459 dashes__, '\0', "", no_helpstring__, \
464 parse_to_value(const char*, const char*, \
465 Command_line*, General_options* options) \
467 options->set_##varname__(invert__); \
468 options->set_user_set_##varname__(); \
471 options::One_option option; \
473 Struct_no_##option__ no_##option__##_initializer_
475 // This is used for non-standard flags. It defines no functions; it
476 // just calls General_options::parse_VARNAME whenever the flag is
477 // seen. We declare parse_VARNAME as a static member of
478 // General_options; you are responsible for defining it there.
479 // helparg__ should be NULL iff this special-option is a boolean.
480 #define DEFINE_special(varname__, dashes__, shortname__, \
481 helpstring__, helparg__) \
483 void parse_##varname__(const char* option, const char* arg, \
484 Command_line* inputs); \
485 struct Struct_##varname__ : public options::Struct_special \
487 Struct_##varname__() \
488 : options::Struct_special(#varname__, dashes__, shortname__, \
489 &General_options::parse_##varname__, \
490 helpstring__, helparg__) \
493 Struct_##varname__ varname__##_initializer_
495 // An option that takes an optional string argument. If the option is
496 // used with no argument, the value will be the default, and
497 // user_set_via_option will be true.
498 #define DEFINE_optional_string(varname__, dashes__, shortname__, \
500 helpstring__, helparg__) \
501 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
502 default_value__, helpstring__, helparg__, true, \
503 const char*, const char*, options::parse_optional_string)
505 // A directory to search. For each directory we record whether it is
506 // in the sysroot. We need to know this so that, if a linker script
507 // is found within the sysroot, we will apply the sysroot to any files
508 // named by that script.
510 class Search_directory
513 // We need a default constructor because we put this in a
516 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
519 // This is the usual constructor.
520 Search_directory(const char* name, bool put_in_sysroot)
521 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
523 if (this->name_.empty())
527 // This is called if we have a sysroot. The sysroot is prefixed to
528 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
529 // set to true for any enries which are in the sysroot (this will
530 // naturally include any entries for which put_in_sysroot_ is true).
531 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
532 // passing SYSROOT to lrealpath.
534 add_sysroot(const char* sysroot, const char* canonical_sysroot);
536 // Get the directory name.
539 { return this->name_; }
541 // Return whether this directory is in the sysroot.
543 is_in_sysroot() const
544 { return this->is_in_sysroot_; }
546 // Return whether this is considered a system directory.
548 is_system_directory() const
549 { return this->put_in_sysroot_ || this->is_in_sysroot_; }
552 // The directory name.
554 // True if the sysroot should be added as a prefix for this
555 // directory (if there is a sysroot). This is true for system
556 // directories that we search by default.
557 bool put_in_sysroot_;
558 // True if this directory is in the sysroot (if there is a sysroot).
559 // This is true if there is a sysroot and either 1) put_in_sysroot_
560 // is true, or 2) the directory happens to be in the sysroot based
561 // on a pathname comparison.
565 class General_options
568 // NOTE: For every option that you add here, also consider if you
569 // should add it to Position_dependent_options.
570 DEFINE_special(help, options::TWO_DASHES, '\0',
571 N_("Report usage information"), NULL);
572 DEFINE_special(version, options::TWO_DASHES, 'v',
573 N_("Report version information"), NULL);
574 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0',
575 N_("Report version and target information"), NULL);
577 // These options are sorted approximately so that for each letter in
578 // the alphabet, we show the option whose shortname is that letter
579 // (if any) and then every longname that starts with that letter (in
580 // alphabetical order). For both, lowercase sorts before uppercase.
581 // The -z options come last.
583 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false,
584 N_("Allow unresolved references in shared libraries"),
585 N_("Do not allow unresolved references in shared libraries"));
587 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false,
588 N_("Only set DT_NEEDED for dynamic libs if used"),
589 N_("Always DT_NEEDED for dynamic libs"));
591 // This should really be an "enum", but it's too easy for folks to
592 // forget to update the list as they add new targets. So we just
593 // accept any string. We'll fail later (when the string is parsed),
594 // if the target isn't actually supported.
595 DEFINE_string(format, options::TWO_DASHES, 'b', "elf",
596 N_("Set input format"), ("[elf,binary]"));
598 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true,
599 N_("-l searches for shared libraries"), NULL);
600 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0',
601 N_("-l does not search for shared libraries"), NULL,
604 DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false,
605 N_("Bind defined symbols locally"), NULL);
607 DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false,
608 N_("Bind defined function symbols locally"), NULL);
610 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "sha1",
611 N_("Generate build ID note"),
614 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true,
615 N_("Check segment addresses for overlaps (default)"),
616 N_("Do not check segment addresses for overlaps"));
619 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
620 N_("Compress .debug_* sections in the output file"),
624 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
625 N_("Compress .debug_* sections in the output file"),
630 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false,
631 N_("Define common symbols"),
632 N_("Do not define common symbols"));
633 DEFINE_bool(dc, options::ONE_DASH, '\0', false,
634 N_("Alias for -d"), NULL);
635 DEFINE_bool(dp, options::ONE_DASH, '\0', false,
636 N_("Alias for -d"), NULL);
638 DEFINE_string(debug, options::TWO_DASHES, '\0', "",
639 N_("Turn on debugging"),
640 N_("[all,files,script,task][,...]"));
642 DEFINE_special(defsym, options::TWO_DASHES, '\0',
643 N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
645 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
646 N_("Demangle C++ symbols in log messages"),
649 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
650 N_("Do not demangle C++ symbols in log messages"),
653 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
654 N_("Try to detect violations of the One Definition Rule"),
657 DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
658 N_("Delete all temporary local symbols"), NULL);
660 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
661 N_("Add data symbols to dynamic symbols"), NULL);
663 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
664 N_("Add C++ operator new/delete to dynamic symbols"), NULL);
666 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
667 N_("Add C++ typeinfo to dynamic symbols"), NULL);
669 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
670 N_("Read a list of dynamic symbols"), N_("FILE"));
672 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
673 N_("Set program start address"), N_("ADDRESS"));
675 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
676 N_("Exclude libraries from automatic export"),
677 N_(("lib,lib ...")));
679 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
680 N_("Export all dynamic symbols"),
681 N_("Do not export all dynamic symbols (default)"));
683 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
684 N_("Create exception frame header"), NULL);
686 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
687 N_("Treat warnings as errors"),
688 N_("Do not treat warnings as errors"));
690 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
691 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
693 DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
694 N_("Set shared library name"), N_("FILENAME"));
696 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
697 N_("Min fraction of empty buckets in dynamic hash"),
700 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
701 N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
702 {"sysv", "gnu", "both"});
704 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
705 N_("Set dynamic linker path"), N_("PROGRAM"));
707 DEFINE_bool(incremental, options::TWO_DASHES, '\0', false,
708 N_("Work in progress; do not use"),
709 N_("Do a full build"));
711 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
712 N_("Assume files changed"), NULL);
714 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
715 N_("Assume files didn't change"), NULL);
717 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
718 N_("Use timestamps to check files (default)"), NULL);
720 DEFINE_string(init, options::ONE_DASH, '\0', "_init",
721 N_("Call SYMBOL at load-time"), N_("SYMBOL"));
723 DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
724 N_("Read only symbol values from FILE"), N_("FILE"));
726 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0',
728 N_("Map whole files to memory (default on 64-bit hosts)"),
729 N_("Map relevant file parts to memory (default on 32-bit "
732 DEFINE_special(library, options::TWO_DASHES, 'l',
733 N_("Search for library LIBNAME"), N_("LIBNAME"));
735 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
736 N_("Add directory to search path"), N_("DIR"));
738 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
739 N_("Ignored for compatibility"), N_("EMULATION"));
741 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
742 N_("Write map file on standard output"), NULL);
743 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
746 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
747 N_("Do not page align data"), NULL);
748 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
749 N_("Do not page align data, do not make text readonly"),
750 N_("Page align data, make text readonly"));
752 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false,
753 N_("Enable use of DT_RUNPATH and DT_FLAGS"),
754 N_("Disable use of DT_RUNPATH and DT_FLAGS"));
756 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
757 N_("Create an output file even if errors occur"), NULL);
759 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
760 N_("Report undefined symbols (even with --shared)"),
763 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
764 N_("Set output file name"), N_("FILE"));
766 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
767 N_("Optimize output file size"), N_("LEVEL"));
769 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
770 N_("Set output format"), N_("[binary]"));
772 DEFINE_bool(pie, options::ONE_DASH, '\0', false,
773 N_("Create a position independent executable"), NULL);
774 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
775 N_("Create a position independent executable"), NULL,
778 #ifdef ENABLE_PLUGINS
779 DEFINE_special(plugin, options::TWO_DASHES, '\0',
780 N_("Load a plugin library"), N_("PLUGIN"));
781 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
782 N_("Pass an option to the plugin"), N_("OPTION"));
785 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
786 N_("Preread archive symbols when multi-threaded"), NULL);
788 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
789 N_("Print symbols defined and used for each input"),
792 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
793 N_("Ignored for SVR4 compatibility"), NULL);
795 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
796 N_("Generate relocations in output"), NULL);
798 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
799 N_("Generate relocatable output"), NULL);
801 DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
802 N_("Relax branches on certain targets"), NULL);
804 DEFINE_string(retain_symbols_file, options::EXACTLY_ONE_DASH, '\0', NULL,
805 N_("keep only symbols listed in this file"), N_("[file]"));
807 // -R really means -rpath, but can mean --just-symbols for
808 // compatibility with GNU ld. -rpath is always -rpath, so we list
810 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
811 N_("Add DIR to runtime search path"), N_("DIR"));
813 DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
814 N_("Add DIR to runtime search path"), N_("DIR"));
816 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
817 N_("Add DIR to link time shared library search path"),
820 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
821 N_("Strip all symbols"), NULL);
822 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
823 N_("Strip debugging information"), NULL);
824 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
825 N_("Emit only debug line number information"), NULL);
826 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
827 N_("Strip debug symbols that are unused by gdb "
828 "(at least versions <= 6.7)"), NULL);
829 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
830 N_("Strip LTO intermediate code sections"), NULL);
832 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
833 N_("(ARM only) The maximum distance from instructions in a group "
834 "of sections to their stubs. Negative values mean stubs "
835 "are always after the group. 1 means using default size.\n"),
838 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
839 N_("Use less memory and more disk I/O "
840 "(included only for compatibility with GNU ld)"), NULL);
842 DEFINE_bool(shared, options::ONE_DASH, '\0', false,
843 N_("Generate shared library"), NULL);
845 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
846 N_("Generate shared library"), NULL);
848 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
849 N_("Stack size when -fsplit-stack function calls non-split"),
852 // This is not actually special in any way, but I need to give it
853 // a non-standard accessor-function name because 'static' is a keyword.
854 DEFINE_special(static, options::ONE_DASH, '\0',
855 N_("Do not link against shared libraries"), NULL);
857 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
858 N_("Identical Code Folding. "
859 "\'--icf=safe\' folds only ctors and dtors."),
861 {"none", "all", "safe"});
863 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
864 N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
866 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
867 N_("List folded identical sections on stderr"),
868 N_("Do not list folded identical sections"));
870 DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
871 N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
873 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
874 N_("Remove unused sections"),
875 N_("Don't remove unused sections (default)"));
877 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
878 N_("List removed unused sections on stderr"),
879 N_("Do not list removed unused sections"));
881 DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
882 N_("Print resource usage statistics"), NULL);
884 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
885 N_("Set target system root directory"), N_("DIR"));
887 DEFINE_bool(trace, options::TWO_DASHES, 't', false,
888 N_("Print the name of each input file"), NULL);
890 DEFINE_special(script, options::TWO_DASHES, 'T',
891 N_("Read linker script"), N_("FILE"));
893 DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
894 N_("Run the linker multi-threaded"),
895 N_("Do not run the linker multi-threaded"));
896 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
897 N_("Number of threads to use"), N_("COUNT"));
898 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
899 N_("Number of threads to use in initial pass"), N_("COUNT"));
900 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
901 N_("Number of threads to use in middle pass"), N_("COUNT"));
902 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
903 N_("Number of threads to use in final pass"), N_("COUNT"));
905 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
906 N_("Set the address of the bss segment"), N_("ADDRESS"));
907 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
908 N_("Set the address of the data segment"), N_("ADDRESS"));
909 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
910 N_("Set the address of the text segment"), N_("ADDRESS"));
912 DEFINE_set(undefined, options::TWO_DASHES, 'u',
913 N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
915 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
916 N_("Synonym for --debug=files"), NULL);
918 DEFINE_special(version_script, options::TWO_DASHES, '\0',
919 N_("Read version script"), N_("FILE"));
921 DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
922 N_("Ignored"), N_("Ignored"));
924 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
925 N_("Warn when skipping an incompatible library"),
926 N_("Don't warn when skipping an incompatible library"));
928 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
929 N_("Include all archive contents"),
930 N_("Include only needed archive contents"));
932 DEFINE_set(wrap, options::TWO_DASHES, '\0',
933 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
935 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
936 N_("Trace references to symbol"), N_("SYMBOL"));
938 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
939 N_("Default search path for Solaris compatibility"),
942 DEFINE_special(start_group, options::TWO_DASHES, '(',
943 N_("Start a library search group"), NULL);
944 DEFINE_special(end_group, options::TWO_DASHES, ')',
945 N_("End a library search group"), NULL);
949 DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
950 N_("Sort dynamic relocs"),
951 N_("Do not sort dynamic relocs"));
952 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
953 N_("Set common page size to SIZE"), N_("SIZE"));
954 DEFINE_bool(defs, options::DASH_Z, '\0', false,
955 N_("Report undefined symbols (even with --shared)"),
957 DEFINE_bool(execstack, options::DASH_Z, '\0', false,
958 N_("Mark output as requiring executable stack"), NULL);
959 DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
960 N_("Mark DSO to be initialized first at runtime"),
962 DEFINE_bool(interpose, options::DASH_Z, '\0', false,
963 N_("Mark object to interpose all DSOs but executable"),
965 DEFINE_bool(lazy, options::DASH_Z, '\0', false,
966 N_("Mark object for lazy runtime binding (default)"),
968 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
969 N_("Mark object requiring immediate process"),
971 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
972 N_("Set maximum page size to SIZE"), N_("SIZE"));
973 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
975 N_("Do not create copy relocs"));
976 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
977 N_("Mark object not to use default search paths"),
979 DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
980 N_("Mark DSO non-deletable at runtime"),
982 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
983 N_("Mark DSO not available to dlopen"),
985 DEFINE_bool(nodump, options::DASH_Z, '\0', false,
986 N_("Mark DSO not available to dldump"),
988 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
989 N_("Mark output as not requiring executable stack"), NULL);
990 DEFINE_bool(now, options::DASH_Z, '\0', false,
991 N_("Mark object for immediate function binding"),
993 DEFINE_bool(origin, options::DASH_Z, '\0', false,
994 N_("Mark DSO to indicate that needs immediate $ORIGIN "
995 "processing at runtime"), NULL);
996 DEFINE_bool(relro, options::DASH_Z, '\0', false,
997 N_("Where possible mark variables read-only after relocation"),
998 N_("Don't mark variables read-only after relocation"));
1001 typedef options::Dir_list Dir_list;
1005 // Does post-processing on flags, making sure they all have
1006 // non-conflicting values. Also converts some flags from their
1007 // "standard" types (string, etc), to another type (enum, DirList),
1008 // which can be accessed via a separate method. Dies if it notices
1012 // True if we printed the version information.
1014 printed_version() const
1015 { return this->printed_version_; }
1017 // The macro defines output() (based on --output), but that's a
1018 // generic name. Provide this alternative name, which is clearer.
1020 output_file_name() const
1021 { return this->output(); }
1023 // This is not defined via a flag, but combines flags to say whether
1024 // the output is position-independent or not.
1026 output_is_position_independent() const
1027 { return this->shared() || this->pie(); }
1029 // Return true if the output is something that can be exec()ed, such
1030 // as a static executable, or a position-dependent or
1031 // position-independent executable, but not a dynamic library or an
1034 output_is_executable() const
1035 { return !this->shared() && !this->relocatable(); }
1037 // This would normally be static(), and defined automatically, but
1038 // since static is a keyword, we need to come up with our own name.
1043 // In addition to getting the input and output formats as a string
1044 // (via format() and oformat()), we also give access as an enum.
1049 // Straight binary format.
1050 OBJECT_FORMAT_BINARY
1053 // Convert a string to an Object_format. Gives an error if the
1054 // string is not recognized.
1055 static Object_format
1056 string_to_object_format(const char* arg);
1058 // Note: these functions are not very fast.
1059 Object_format format_enum() const;
1060 Object_format oformat_enum() const;
1062 // Return whether FILENAME is in a system directory.
1064 is_in_system_directory(const std::string& name) const;
1066 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
1068 should_retain_symbol(const char* symbol_name) const
1070 if (symbols_to_retain_.empty()) // means flag wasn't specified
1072 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
1075 // These are the best way to get access to the execstack state,
1076 // not execstack() and noexecstack() which are hard to use properly.
1078 is_execstack_set() const
1079 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
1082 is_stack_executable() const
1083 { return this->execstack_status_ == EXECSTACK_YES; }
1087 { return this->icf_status_ != ICF_NONE; }
1090 icf_safe_folding() const
1091 { return this->icf_status_ == ICF_SAFE; }
1093 // The --demangle option takes an optional string, and there is also
1094 // a --no-demangle option. This is the best way to decide whether
1095 // to demangle or not.
1098 { return this->do_demangle_; }
1100 // Returns TRUE if any plugin libraries have been loaded.
1103 { return this->plugins_ != NULL; }
1105 // Return a pointer to the plugin manager.
1108 { return this->plugins_; }
1110 // True iff SYMBOL was found in the file specified by dynamic-list.
1112 in_dynamic_list(const char* symbol) const
1113 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
1115 // The disposition given by the --incremental-changed,
1116 // --incremental-unchanged or --incremental-unknown option. The
1117 // value may change as we proceed parsing the command line flags.
1118 Incremental_disposition
1119 incremental_disposition() const
1120 { return this->incremental_disposition_; }
1122 // Return true if S is the name of a library excluded from automatic
1125 check_excluded_libs (const std::string &s) const;
1128 // Don't copy this structure.
1129 General_options(const General_options&);
1130 General_options& operator=(const General_options&);
1132 // Whether to mark the stack as executable.
1135 // Not set on command line.
1136 EXECSTACK_FROM_INPUT,
1137 // Mark the stack as executable (-z execstack).
1139 // Mark the stack as not executable (-z noexecstack).
1145 // Do not fold any functions (Default or --icf=none).
1147 // All functions are candidates for folding. (--icf=all).
1149 // Only ctors and dtors are candidates for folding. (--icf=safe).
1154 set_icf_status(Icf_status value)
1155 { this->icf_status_ = value; }
1158 set_execstack_status(Execstack value)
1159 { this->execstack_status_ = value; }
1162 set_do_demangle(bool value)
1163 { this->do_demangle_ = value; }
1166 set_static(bool value)
1167 { static_ = value; }
1169 // These are called by finalize() to set up the search-path correctly.
1171 add_to_library_path_with_sysroot(const char* arg)
1172 { this->add_search_directory_to_library_path(Search_directory(arg, true)); }
1174 // Apply any sysroot to the directory lists.
1178 // Add a plugin and its arguments to the list of plugins.
1180 add_plugin(const char *filename);
1182 // Add a plugin option.
1184 add_plugin_option(const char* opt);
1186 // Whether we printed version information.
1187 bool printed_version_;
1188 // Whether to mark the stack as executable.
1189 Execstack execstack_status_;
1190 // Whether to do code folding.
1191 Icf_status icf_status_;
1192 // Whether to do a static link.
1194 // Whether to do demangling.
1196 // List of plugin libraries.
1197 Plugin_manager* plugins_;
1198 // The parsed output of --dynamic-list files. For convenience in
1199 // script.cc, we store this as a Script_options object, even though
1200 // we only use a single Version_tree from it.
1201 Script_options dynamic_list_;
1202 // The disposition given by the --incremental-changed,
1203 // --incremental-unchanged or --incremental-unknown option. The
1204 // value may change as we proceed parsing the command line flags.
1205 Incremental_disposition incremental_disposition_;
1206 // Whether we have seen one of the options that require incremental
1207 // build (--incremental-changed, --incremental-unchanged or
1208 // --incremental-unknown)
1209 bool implicit_incremental_;
1210 // Libraries excluded from automatic export, via --exclude-libs.
1211 Unordered_set<std::string> excluded_libs_;
1212 // List of symbol-names to keep, via -retain-symbol-info.
1213 Unordered_set<std::string> symbols_to_retain_;
1216 // The position-dependent options. We use this to store the state of
1217 // the commandline at a particular point in parsing for later
1218 // reference. For instance, if we see "ld --whole-archive foo.a
1219 // --no-whole-archive," we want to store the whole-archive option with
1220 // foo.a, so when the time comes to parse foo.a we know we should do
1221 // it in whole-archive mode. We could store all of General_options,
1222 // but that's big, so we just pick the subset of flags that actually
1223 // change in a position-dependent way.
1225 #define DEFINE_posdep(varname__, type__) \
1229 { return this->varname__##_; } \
1232 set_##varname__(type__ value) \
1233 { this->varname__##_ = value; } \
1237 class Position_dependent_options
1240 Position_dependent_options(const General_options& options
1241 = Position_dependent_options::default_options_)
1242 { copy_from_options(options); }
1244 void copy_from_options(const General_options& options)
1246 this->set_as_needed(options.as_needed());
1247 this->set_Bdynamic(options.Bdynamic());
1248 this->set_format_enum(options.format_enum());
1249 this->set_whole_archive(options.whole_archive());
1250 this->set_incremental_disposition(options.incremental_disposition());
1253 DEFINE_posdep(as_needed, bool);
1254 DEFINE_posdep(Bdynamic, bool);
1255 DEFINE_posdep(format_enum, General_options::Object_format);
1256 DEFINE_posdep(whole_archive, bool);
1257 DEFINE_posdep(incremental_disposition, Incremental_disposition);
1260 // This is a General_options with everything set to its default
1261 // value. A Position_dependent_options created with no argument
1262 // will take its values from here.
1263 static General_options default_options_;
1267 // A single file or library argument from the command line.
1269 class Input_file_argument
1272 enum Input_file_type
1274 // A regular file, name used as-is, not searched.
1275 INPUT_FILE_TYPE_FILE,
1276 // A library name. When used, "lib" will be prepended and ".so" or
1277 // ".a" appended to make a filename, and that filename will be searched
1278 // for using the -L paths.
1279 INPUT_FILE_TYPE_LIBRARY,
1280 // A regular file, name used as-is, but searched using the -L paths.
1281 INPUT_FILE_TYPE_SEARCHED_FILE
1284 // name: file name or library name
1285 // type: the type of this input file.
1286 // extra_search_path: an extra directory to look for the file, prior
1287 // to checking the normal library search path. If this is "",
1288 // then no extra directory is added.
1289 // just_symbols: whether this file only defines symbols.
1290 // options: The position dependent options at this point in the
1291 // command line, such as --whole-archive.
1292 Input_file_argument()
1293 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
1294 just_symbols_(false), options_()
1297 Input_file_argument(const char* name, Input_file_type type,
1298 const char* extra_search_path,
1300 const Position_dependent_options& options)
1301 : name_(name), type_(type), extra_search_path_(extra_search_path),
1302 just_symbols_(just_symbols), options_(options)
1305 // You can also pass in a General_options instance instead of a
1306 // Position_dependent_options. In that case, we extract the
1307 // position-independent vars from the General_options and only store
1309 Input_file_argument(const char* name, Input_file_type type,
1310 const char* extra_search_path,
1312 const General_options& options)
1313 : name_(name), type_(type), extra_search_path_(extra_search_path),
1314 just_symbols_(just_symbols), options_(options)
1319 { return this->name_.c_str(); }
1321 const Position_dependent_options&
1323 { return this->options_; }
1327 { return type_ == INPUT_FILE_TYPE_LIBRARY; }
1330 is_searched_file() const
1331 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
1334 extra_search_path() const
1336 return (this->extra_search_path_.empty()
1338 : this->extra_search_path_.c_str());
1341 // Return whether we should only read symbols from this file.
1343 just_symbols() const
1344 { return this->just_symbols_; }
1346 // Return whether this file may require a search using the -L
1349 may_need_search() const
1351 return (this->is_lib()
1352 || this->is_searched_file()
1353 || !this->extra_search_path_.empty());
1357 // We use std::string, not const char*, here for convenience when
1358 // using script files, so that we do not have to preserve the string
1361 Input_file_type type_;
1362 std::string extra_search_path_;
1364 Position_dependent_options options_;
1367 // A file or library, or a group, from the command line.
1369 class Input_argument
1372 // Create a file or library argument.
1373 explicit Input_argument(Input_file_argument file)
1374 : is_file_(true), file_(file), group_(NULL)
1377 // Create a group argument.
1378 explicit Input_argument(Input_file_group* group)
1379 : is_file_(false), group_(group)
1382 // Return whether this is a file.
1385 { return this->is_file_; }
1387 // Return whether this is a group.
1390 { return !this->is_file_; }
1392 // Return the information about the file.
1393 const Input_file_argument&
1396 gold_assert(this->is_file_);
1400 // Return the information about the group.
1401 const Input_file_group*
1404 gold_assert(!this->is_file_);
1405 return this->group_;
1411 gold_assert(!this->is_file_);
1412 return this->group_;
1417 Input_file_argument file_;
1418 Input_file_group* group_;
1421 typedef std::vector<Input_argument> Input_argument_list;
1423 // A group from the command line. This is a set of arguments within
1424 // --start-group ... --end-group.
1426 class Input_file_group
1429 typedef Input_argument_list::const_iterator const_iterator;
1435 // Add a file to the end of the group.
1437 add_file(const Input_file_argument& arg)
1438 { this->files_.push_back(Input_argument(arg)); }
1440 // Iterators to iterate over the group contents.
1444 { return this->files_.begin(); }
1448 { return this->files_.end(); }
1451 Input_argument_list files_;
1454 // A list of files from the command line or a script.
1456 class Input_arguments
1459 typedef Input_argument_list::const_iterator const_iterator;
1462 : input_argument_list_(), in_group_(false)
1467 add_file(const Input_file_argument& arg);
1469 // Start a group (the --start-group option).
1473 // End a group (the --end-group option).
1477 // Return whether we are currently in a group.
1480 { return this->in_group_; }
1482 // The number of entries in the list.
1485 { return this->input_argument_list_.size(); }
1487 // Iterators to iterate over the list of input files.
1491 { return this->input_argument_list_.begin(); }
1495 { return this->input_argument_list_.end(); }
1497 // Return whether the list is empty.
1500 { return this->input_argument_list_.empty(); }
1503 Input_argument_list input_argument_list_;
1508 // All the information read from the command line. These are held in
1509 // three separate structs: one to hold the options (--foo), one to
1510 // hold the filenames listed on the commandline, and one to hold
1511 // linker script information. This third is not a subset of the other
1512 // two because linker scripts can be specified either as options (via
1513 // -T) or as a file.
1518 typedef Input_arguments::const_iterator const_iterator;
1522 // Process the command line options. This will exit with an
1523 // appropriate error message if an unrecognized option is seen.
1525 process(int argc, const char** argv);
1527 // Process one command-line option. This takes the index of argv to
1528 // process, and returns the index for the next option. no_more_options
1529 // is set to true if argv[i] is "--".
1531 process_one_option(int argc, const char** argv, int i,
1532 bool* no_more_options);
1534 // Get the general options.
1535 const General_options&
1537 { return this->options_; }
1539 // Get the position dependent options.
1540 const Position_dependent_options&
1541 position_dependent_options() const
1542 { return this->position_options_; }
1544 // Get the linker-script options.
1547 { return this->script_options_; }
1549 // Get the version-script options: a convenience routine.
1550 const Version_script_info&
1551 version_script() const
1552 { return *this->script_options_.version_script_info(); }
1554 // Get the input files.
1557 { return this->inputs_; }
1559 // The number of input files.
1561 number_of_input_files() const
1562 { return this->inputs_.size(); }
1564 // Iterators to iterate over the list of input files.
1568 { return this->inputs_.begin(); }
1572 { return this->inputs_.end(); }
1575 Command_line(const Command_line&);
1576 Command_line& operator=(const Command_line&);
1578 // This is a dummy class to provide a constructor that runs before
1579 // the constructor for the General_options. The Pre_options constructor
1580 // is used as a hook to set the flag enabling the options to register
1582 struct Pre_options {
1586 // This must come before options_!
1587 Pre_options pre_options_;
1588 General_options options_;
1589 Position_dependent_options position_options_;
1590 Script_options script_options_;
1591 Input_arguments inputs_;
1594 } // End namespace gold.
1596 #endif // !defined(GOLD_OPTIONS_H)