1 // options.h -- handle command line options for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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
53 class General_options;
54 class Search_directory;
55 class Input_file_group;
57 class Position_dependent_options;
62 // Incremental build action for a specific file, as selected by the user.
64 enum Incremental_disposition
66 // Determine the status from the timestamp (default).
68 // Assume the file changed from the previous build.
70 // Assume the file didn't change from the previous build.
74 // The nested namespace is to contain all the global variables and
75 // structs that need to be defined in the .h file, but do not need to
76 // be used outside this class.
79 typedef std::vector<Search_directory> Dir_list;
80 typedef Unordered_set<std::string> String_set;
82 // These routines convert from a string option to various types.
83 // Each gives a fatal error if it cannot parse the argument.
86 parse_bool(const char* option_name, const char* arg, bool* retval);
89 parse_int(const char* option_name, const char* arg, int* retval);
92 parse_uint(const char* option_name, const char* arg, int* retval);
95 parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
98 parse_double(const char* option_name, const char* arg, double* retval);
101 parse_string(const char* option_name, const char* arg, const char** retval);
104 parse_optional_string(const char* option_name, const char* arg,
105 const char** retval);
108 parse_dirlist(const char* option_name, const char* arg, Dir_list* retval);
111 parse_set(const char* option_name, const char* arg, String_set* retval);
114 parse_choices(const char* option_name, const char* arg, const char** retval,
115 const char* choices[], int num_choices);
119 // Most options have both a shortname (one letter) and a longname.
120 // This enum controls how many dashes are expected for longname access
121 // -- shortnames always use one dash. Most longnames will accept
122 // either one dash or two; the only difference between ONE_DASH and
123 // TWO_DASHES is how we print the option in --help. However, some
124 // longnames require two dashes, and some require only one. The
125 // special value DASH_Z means that the option is preceded by "-z".
128 ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z
131 // LONGNAME is the long-name of the option with dashes converted to
132 // underscores, or else the short-name if the option has no long-name.
133 // It is never the empty string.
134 // DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
135 // SHORTNAME is the short-name of the option, as a char, or '\0' if the
136 // option has no short-name. If the option has no long-name, you
137 // should specify the short-name in *both* VARNAME and here.
138 // DEFAULT_VALUE is the value of the option if not specified on the
139 // commandline, as a string.
140 // HELPSTRING is the descriptive text used with the option via --help
141 // HELPARG is how you define the argument to the option.
142 // --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
143 // HELPARG should be NULL iff the option is a bool and takes no arg.
144 // OPTIONAL_ARG is true if this option takes an optional argument. An
145 // optional argument must be specifid as --OPTION=VALUE, not
147 // READER provides parse_to_value, which is a function that will convert
148 // a char* argument into the proper type and store it in some variable.
149 // A One_option struct initializes itself with the global list of options
150 // at constructor time, so be careful making one of these.
153 std::string longname;
156 const char* default_value;
157 const char* helpstring;
162 One_option(const char* ln, Dashes d, char sn, const char* dv,
163 const char* hs, const char* ha, bool oa, Struct_var* r)
164 : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""),
165 helpstring(hs), helparg(ha), optional_arg(oa), reader(r)
167 // In longname, we convert all underscores to dashes, since GNU
168 // style uses dashes in option names. longname is likely to have
169 // underscores in it because it's also used to declare a C++
171 const char* pos = strchr(this->longname.c_str(), '_');
172 for (; pos; pos = strchr(pos, '_'))
173 this->longname[pos - this->longname.c_str()] = '-';
175 // We only register ourselves if our helpstring is not NULL. This
176 // is to support the "no-VAR" boolean variables, which we
177 // conditionally turn on by defining "no-VAR" help text.
178 if (this->helpstring)
179 this->register_option();
182 // This option takes an argument iff helparg is not NULL.
184 takes_argument() const
185 { return this->helparg != NULL; }
187 // Whether the argument is optional.
189 takes_optional_argument() const
190 { return this->optional_arg; }
192 // Register this option with the global list of options.
196 // Print this option to stdout (used with --help).
201 // All options have a Struct_##varname that inherits from this and
202 // actually implements parse_to_value for that option.
205 // OPTION: the name of the option as specified on the commandline,
206 // including leading dashes, and any text following the option:
207 // "-O", "--defsym=mysym=0x1000", etc.
208 // ARG: the arg associated with this option, or NULL if the option
209 // takes no argument: "2", "mysym=0x1000", etc.
210 // CMDLINE: the global Command_line object. Used by DEFINE_special.
211 // OPTIONS: the global General_options object. Used by DEFINE_special.
213 parse_to_value(const char* option, const char* arg,
214 Command_line* cmdline, General_options* options) = 0;
216 ~Struct_var() // To make gcc happy.
220 // This is for "special" options that aren't of any predefined type.
221 struct Struct_special : public Struct_var
223 // If you change this, change the parse-fn in DEFINE_special as well.
224 typedef void (General_options::*Parse_function)(const char*, const char*,
226 Struct_special(const char* varname, Dashes dashes, char shortname,
227 Parse_function parse_function,
228 const char* helpstring, const char* helparg)
229 : option(varname, dashes, shortname, "", helpstring, helparg, false, this),
230 parse(parse_function)
233 void parse_to_value(const char* option, const char* arg,
234 Command_line* cmdline, General_options* options)
235 { (options->*(this->parse))(option, arg, cmdline); }
238 Parse_function parse;
241 } // End namespace options.
244 // These are helper macros use by DEFINE_uint64/etc below.
245 // This macro is used inside the General_options_ class, so defines
246 // var() and set_var() as General_options methods. Arguments as are
247 // for the constructor for One_option. param_type__ is the same as
248 // type__ for built-in types, and "const type__ &" otherwise.
250 // When we define the linker command option "assert", the macro argument
251 // varname__ of DEFINE_var below will be replaced by "assert". On Mac OSX
252 // assert.h is included implicitly by one of the library headers we use. To
253 // avoid unintended macro substitution of "assert()", we need to enclose
254 // varname__ with parenthese.
255 #define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
256 default_value_as_string__, helpstring__, helparg__, \
257 optional_arg__, type__, param_type__, parse_fn__) \
260 (varname__)() const \
261 { return this->varname__##_.value; } \
264 user_set_##varname__() const \
265 { return this->varname__##_.user_set_via_option; } \
268 set_user_set_##varname__() \
269 { this->varname__##_.user_set_via_option = true; } \
272 struct Struct_##varname__ : public options::Struct_var \
274 Struct_##varname__() \
275 : option(#varname__, dashes__, shortname__, default_value_as_string__, \
276 helpstring__, helparg__, optional_arg__, this), \
277 user_set_via_option(false), value(default_value__) \
281 parse_to_value(const char* option_name, const char* arg, \
282 Command_line*, General_options*) \
284 parse_fn__(option_name, arg, &this->value); \
285 this->user_set_via_option = true; \
288 options::One_option option; \
289 bool user_set_via_option; \
292 Struct_##varname__ varname__##_; \
294 set_##varname__(param_type__ value) \
295 { this->varname__##_.value = value; }
297 // These macros allow for easy addition of a new commandline option.
299 // If no_helpstring__ is not NULL, then in addition to creating
300 // VARNAME, we also create an option called no-VARNAME (or, for a -z
301 // option, noVARNAME).
302 #define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
303 helpstring__, no_helpstring__) \
304 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
305 default_value__ ? "true" : "false", helpstring__, NULL, \
306 false, bool, bool, options::parse_bool) \
307 struct Struct_no_##varname__ : public options::Struct_var \
309 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
311 : "no-" #varname__), \
313 default_value__ ? "false" : "true", \
314 no_helpstring__, NULL, false, this) \
318 parse_to_value(const char*, const char*, \
319 Command_line*, General_options* options) \
321 options->set_##varname__(false); \
322 options->set_user_set_##varname__(); \
325 options::One_option option; \
327 Struct_no_##varname__ no_##varname__##_initializer_
329 #define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
330 helpstring__, no_helpstring__) \
331 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
332 default_value__ ? "true" : "false", helpstring__, NULL, \
333 false, bool, bool, options::parse_bool) \
334 struct Struct_disable_##varname__ : public options::Struct_var \
336 Struct_disable_##varname__() : option("disable-" #varname__, \
338 default_value__ ? "false" : "true", \
339 no_helpstring__, NULL, false, this) \
343 parse_to_value(const char*, const char*, \
344 Command_line*, General_options* options) \
345 { options->set_enable_##varname__(false); } \
347 options::One_option option; \
349 Struct_disable_##varname__ disable_##varname__##_initializer_
351 #define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
352 helpstring__, helparg__) \
353 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
354 #default_value__, helpstring__, helparg__, false, \
355 int, int, options::parse_int)
357 #define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
358 helpstring__, helparg__) \
359 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
360 #default_value__, helpstring__, helparg__, false, \
361 int, int, options::parse_uint)
363 #define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
364 helpstring__, helparg__) \
365 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
366 #default_value__, helpstring__, helparg__, false, \
367 uint64_t, uint64_t, options::parse_uint64)
369 #define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
370 helpstring__, helparg__) \
371 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
372 #default_value__, helpstring__, helparg__, false, \
373 double, double, options::parse_double)
375 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
376 helpstring__, helparg__) \
377 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
378 default_value__, helpstring__, helparg__, false, \
379 const char*, const char*, options::parse_string)
381 // This is like DEFINE_string, but we convert each occurrence to a
382 // Search_directory and store it in a vector. Thus we also have the
383 // add_to_VARNAME() method, to append to the vector.
384 #define DEFINE_dirlist(varname__, dashes__, shortname__, \
385 helpstring__, helparg__) \
386 DEFINE_var(varname__, dashes__, shortname__, , \
387 "", helpstring__, helparg__, false, options::Dir_list, \
388 const options::Dir_list&, options::parse_dirlist) \
390 add_to_##varname__(const char* new_value) \
391 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
393 add_search_directory_to_##varname__(const Search_directory& dir) \
394 { this->varname__##_.value.push_back(dir); }
396 // This is like DEFINE_string, but we store a set of strings.
397 #define DEFINE_set(varname__, dashes__, shortname__, \
398 helpstring__, helparg__) \
399 DEFINE_var(varname__, dashes__, shortname__, , \
400 "", helpstring__, helparg__, false, options::String_set, \
401 const options::String_set&, options::parse_set) \
404 any_##varname__() const \
405 { return !this->varname__##_.value.empty(); } \
408 is_##varname__(const char* symbol) const \
410 return (!this->varname__##_.value.empty() \
411 && (this->varname__##_.value.find(std::string(symbol)) \
412 != this->varname__##_.value.end())); \
415 options::String_set::const_iterator \
416 varname__##_begin() const \
417 { return this->varname__##_.value.begin(); } \
419 options::String_set::const_iterator \
420 varname__##_end() const \
421 { return this->varname__##_.value.end(); }
423 // When you have a list of possible values (expressed as string)
424 // After helparg__ should come an initializer list, like
425 // {"foo", "bar", "baz"}
426 #define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
427 helpstring__, helparg__, ...) \
428 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
429 default_value__, helpstring__, helparg__, false, \
430 const char*, const char*, parse_choices_##varname__) \
432 static void parse_choices_##varname__(const char* option_name, \
434 const char** retval) { \
435 const char* choices[] = __VA_ARGS__; \
436 options::parse_choices(option_name, arg, retval, \
437 choices, sizeof(choices) / sizeof(*choices)); \
440 // This is like DEFINE_bool, but VARNAME is the name of a different
441 // option. This option becomes an alias for that one. INVERT is true
442 // if this option is an inversion of the other one.
443 #define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
444 helpstring__, no_helpstring__, invert__) \
446 struct Struct_##option__ : public options::Struct_var \
448 Struct_##option__() \
449 : option(#option__, dashes__, shortname__, "", helpstring__, \
454 parse_to_value(const char*, const char*, \
455 Command_line*, General_options* options) \
457 options->set_##varname__(!invert__); \
458 options->set_user_set_##varname__(); \
461 options::One_option option; \
463 Struct_##option__ option__##_; \
465 struct Struct_no_##option__ : public options::Struct_var \
467 Struct_no_##option__() \
468 : option((dashes__ == options::DASH_Z \
470 : "no-" #option__), \
471 dashes__, '\0', "", no_helpstring__, \
476 parse_to_value(const char*, const char*, \
477 Command_line*, General_options* options) \
479 options->set_##varname__(invert__); \
480 options->set_user_set_##varname__(); \
483 options::One_option option; \
485 Struct_no_##option__ no_##option__##_initializer_
487 // This is used for non-standard flags. It defines no functions; it
488 // just calls General_options::parse_VARNAME whenever the flag is
489 // seen. We declare parse_VARNAME as a static member of
490 // General_options; you are responsible for defining it there.
491 // helparg__ should be NULL iff this special-option is a boolean.
492 #define DEFINE_special(varname__, dashes__, shortname__, \
493 helpstring__, helparg__) \
495 void parse_##varname__(const char* option, const char* arg, \
496 Command_line* inputs); \
497 struct Struct_##varname__ : public options::Struct_special \
499 Struct_##varname__() \
500 : options::Struct_special(#varname__, dashes__, shortname__, \
501 &General_options::parse_##varname__, \
502 helpstring__, helparg__) \
505 Struct_##varname__ varname__##_initializer_
507 // An option that takes an optional string argument. If the option is
508 // used with no argument, the value will be the default, and
509 // user_set_via_option will be true.
510 #define DEFINE_optional_string(varname__, dashes__, shortname__, \
512 helpstring__, helparg__) \
513 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
514 default_value__, helpstring__, helparg__, true, \
515 const char*, const char*, options::parse_optional_string)
517 // A directory to search. For each directory we record whether it is
518 // in the sysroot. We need to know this so that, if a linker script
519 // is found within the sysroot, we will apply the sysroot to any files
520 // named by that script.
522 class Search_directory
525 // We need a default constructor because we put this in a
528 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
531 // This is the usual constructor.
532 Search_directory(const char* name, bool put_in_sysroot)
533 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
535 if (this->name_.empty())
539 // This is called if we have a sysroot. The sysroot is prefixed to
540 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
541 // set to true for any enries which are in the sysroot (this will
542 // naturally include any entries for which put_in_sysroot_ is true).
543 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
544 // passing SYSROOT to lrealpath.
546 add_sysroot(const char* sysroot, const char* canonical_sysroot);
548 // Get the directory name.
551 { return this->name_; }
553 // Return whether this directory is in the sysroot.
555 is_in_sysroot() const
556 { return this->is_in_sysroot_; }
558 // Return whether this is considered a system directory.
560 is_system_directory() const
561 { return this->put_in_sysroot_ || this->is_in_sysroot_; }
564 // The directory name.
566 // True if the sysroot should be added as a prefix for this
567 // directory (if there is a sysroot). This is true for system
568 // directories that we search by default.
569 bool put_in_sysroot_;
570 // True if this directory is in the sysroot (if there is a sysroot).
571 // This is true if there is a sysroot and either 1) put_in_sysroot_
572 // is true, or 2) the directory happens to be in the sysroot based
573 // on a pathname comparison.
577 class General_options
580 // NOTE: For every option that you add here, also consider if you
581 // should add it to Position_dependent_options.
582 DEFINE_special(help, options::TWO_DASHES, '\0',
583 N_("Report usage information"), NULL);
584 DEFINE_special(version, options::TWO_DASHES, 'v',
585 N_("Report version information"), NULL);
586 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0',
587 N_("Report version and target information"), NULL);
589 // These options are sorted approximately so that for each letter in
590 // the alphabet, we show the option whose shortname is that letter
591 // (if any) and then every longname that starts with that letter (in
592 // alphabetical order). For both, lowercase sorts before uppercase.
593 // The -z options come last.
595 DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false,
597 N_("Do not copy DT_NEEDED tags from shared libraries"));
599 DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES,
600 '\0', N_("Allow multiple definitions of symbols"),
601 N_("Do not allow multiple definitions"), false);
603 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false,
604 N_("Allow unresolved references in shared libraries"),
605 N_("Do not allow unresolved references in shared libraries"));
607 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false,
608 N_("Only set DT_NEEDED for shared libraries if used"),
609 N_("Always DT_NEEDED for shared libraries"));
611 DEFINE_enum(assert, options::ONE_DASH, '\0', NULL,
612 N_("Ignored"), N_("[ignored]"),
613 {"definitions", "nodefinitions", "nosymbolic", "pure-text"});
615 // This should really be an "enum", but it's too easy for folks to
616 // forget to update the list as they add new targets. So we just
617 // accept any string. We'll fail later (when the string is parsed),
618 // if the target isn't actually supported.
619 DEFINE_string(format, options::TWO_DASHES, 'b', "elf",
620 N_("Set input format"), ("[elf,binary]"));
622 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true,
623 N_("-l searches for shared libraries"), NULL);
624 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0',
625 N_("-l does not search for shared libraries"), NULL,
627 DEFINE_bool_alias(dy, Bdynamic, options::ONE_DASH, '\0',
628 N_("alias for -Bdynamic"), NULL, false);
629 DEFINE_bool_alias(dn, Bdynamic, options::ONE_DASH, '\0',
630 N_("alias for -Bstatic"), NULL, true);
632 DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false,
633 N_("Bind defined symbols locally"), NULL);
635 DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false,
636 N_("Bind defined function symbols locally"), NULL);
638 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "sha1",
639 N_("Generate build ID note"),
642 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true,
643 N_("Check segment addresses for overlaps (default)"),
644 N_("Do not check segment addresses for overlaps"));
647 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
648 N_("Compress .debug_* sections in the output file"),
652 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
653 N_("Compress .debug_* sections in the output file"),
658 DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false,
660 N_("Do not copy DT_NEEDED tags from shared libraries"));
662 DEFINE_bool(cref, options::TWO_DASHES, '\0', false,
663 N_("Output cross reference table"),
664 N_("Do not output cross reference table"));
666 DEFINE_bool(ctors_in_init_array, options::TWO_DASHES, '\0', true,
667 N_("Use DT_INIT_ARRAY for all constructors (default)"),
668 N_("Handle constructors as directed by compiler"));
670 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false,
671 N_("Define common symbols"),
672 N_("Do not define common symbols"));
673 DEFINE_bool(dc, options::ONE_DASH, '\0', false,
674 N_("Alias for -d"), NULL);
675 DEFINE_bool(dp, options::ONE_DASH, '\0', false,
676 N_("Alias for -d"), NULL);
678 DEFINE_string(debug, options::TWO_DASHES, '\0', "",
679 N_("Turn on debugging"),
680 N_("[all,files,script,task][,...]"));
682 DEFINE_special(defsym, options::TWO_DASHES, '\0',
683 N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
685 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
686 N_("Demangle C++ symbols in log messages"),
689 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
690 N_("Do not demangle C++ symbols in log messages"),
693 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
694 N_("Look for violations of the C++ One Definition Rule"),
695 N_("Do not look for violations of the C++ One Definition Rule"));
697 DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false,
698 N_("Delete all local symbols"), NULL);
699 DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
700 N_("Delete all temporary local symbols"), NULL);
702 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
703 N_("Add data symbols to dynamic symbols"), NULL);
705 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
706 N_("Add C++ operator new/delete to dynamic symbols"), NULL);
708 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
709 N_("Add C++ typeinfo to dynamic symbols"), NULL);
711 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
712 N_("Read a list of dynamic symbols"), N_("FILE"));
714 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
715 N_("Set program start address"), N_("ADDRESS"));
717 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
718 N_("Exclude libraries from automatic export"),
719 N_(("lib,lib ...")));
721 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
722 N_("Export all dynamic symbols"),
723 N_("Do not export all dynamic symbols (default)"));
725 DEFINE_special(EB, options::ONE_DASH, '\0',
726 N_("Link big-endian objects."), NULL);
728 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
729 N_("Create exception frame header"), NULL);
731 DEFINE_special(EL, options::ONE_DASH, '\0',
732 N_("Link little-endian objects."), NULL);
734 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL,
735 N_("(ARM only) Do not warn about objects with incompatible "
738 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
739 N_("Treat warnings as errors"),
740 N_("Do not treat warnings as errors"));
742 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
743 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
745 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false,
746 N_("(ARM only) Fix binaries for Cortex-A8 erratum."),
747 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum."));
749 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true,
750 N_("(ARM only) Merge exidx entries in debuginfo."),
751 N_("(ARM only) Do not merge exidx entries in debuginfo."));
753 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0',
754 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"),
757 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0',
758 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking "
762 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
763 N_("Ignored"), NULL);
765 DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
766 N_("Set shared library name"), N_("FILENAME"));
768 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
769 N_("Min fraction of empty buckets in dynamic hash"),
772 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
773 N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
774 {"sysv", "gnu", "both"});
776 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
777 N_("Set dynamic linker path"), N_("PROGRAM"));
779 DEFINE_special(incremental, options::TWO_DASHES, '\0',
780 N_("Do an incremental link if possible; "
781 "otherwise, do a full link and prepare output "
782 "for incremental linking"), NULL);
784 DEFINE_special(no_incremental, options::TWO_DASHES, '\0',
785 N_("Do a full link (default)"), NULL);
787 DEFINE_special(incremental_full, options::TWO_DASHES, '\0',
788 N_("Do a full link and "
789 "prepare output for incremental linking"), NULL);
791 DEFINE_special(incremental_update, options::TWO_DASHES, '\0',
792 N_("Do an incremental link; exit if not possible"), NULL);
794 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL,
795 N_("Set base file for incremental linking"
796 " (default is output file)"),
799 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
800 N_("Assume files changed"), NULL);
802 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
803 N_("Assume files didn't change"), NULL);
805 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
806 N_("Use timestamps to check files (default)"), NULL);
808 DEFINE_string(init, options::ONE_DASH, '\0', "_init",
809 N_("Call SYMBOL at load-time"), N_("SYMBOL"));
811 DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
812 N_("Read only symbol values from FILE"), N_("FILE"));
814 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0',
816 N_("Map whole files to memory (default on 64-bit hosts)"),
817 N_("Map relevant file parts to memory (default on 32-bit "
819 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true,
820 N_("Keep files mapped across passes (default)"),
821 N_("Release mapped files after each pass"));
823 DEFINE_bool(ld_generated_unwind_info, options::TWO_DASHES, '\0', true,
824 N_("Generate unwind information for PLT (default)"),
825 N_("Do not generate unwind information for PLT"));
827 DEFINE_special(library, options::TWO_DASHES, 'l',
828 N_("Search for library LIBNAME"), N_("LIBNAME"));
830 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
831 N_("Add directory to search path"), N_("DIR"));
833 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false,
834 N_(" Only search directories specified on the command line."),
837 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false,
838 N_(" Put read-only non-executable sections in their own segment"),
841 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
842 N_("Set GNU linker emulation; obsolete"), N_("EMULATION"));
844 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
845 N_("Write map file on standard output"), NULL);
846 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
849 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
850 N_("Do not page align data"), NULL);
851 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
852 N_("Do not page align data, do not make text readonly"),
853 N_("Page align data, make text readonly"));
855 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false,
856 N_("Enable use of DT_RUNPATH and DT_FLAGS"),
857 N_("Disable use of DT_RUNPATH and DT_FLAGS"));
859 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
860 N_("Create an output file even if errors occur"), NULL);
862 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
863 N_("Report undefined symbols (even with --shared)"),
866 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
867 N_("Set output file name"), N_("FILE"));
869 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
870 N_("Optimize output file size"), N_("LEVEL"));
872 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
873 N_("Set output format"), N_("[binary]"));
875 DEFINE_bool(p, options::ONE_DASH, '\0', false,
876 N_("(ARM only) Ignore for backward compatibility"), NULL);
878 DEFINE_bool(pie, options::ONE_DASH, '\0', false,
879 N_("Create a position independent executable"), NULL);
880 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
881 N_("Create a position independent executable"), NULL,
884 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false,
885 NULL, N_("(ARM only) Ignore for backward compatibility"));
887 #ifdef ENABLE_PLUGINS
888 DEFINE_special(plugin, options::TWO_DASHES, '\0',
889 N_("Load a plugin library"), N_("PLUGIN"));
890 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
891 N_("Pass an option to the plugin"), N_("OPTION"));
894 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
895 N_("Preread archive symbols when multi-threaded"), NULL);
897 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
898 N_("Print symbols defined and used for each input"),
901 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
902 N_("Ignored for SVR4 compatibility"), NULL);
904 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
905 N_("Generate relocations in output"), NULL);
907 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
908 N_("Generate relocatable output"), NULL);
909 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0',
910 N_("Synonym for -r"), NULL, false);
912 DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
913 N_("Relax branches on certain targets"), NULL);
915 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL,
916 N_("keep only symbols listed in this file"), N_("FILE"));
918 // -R really means -rpath, but can mean --just-symbols for
919 // compatibility with GNU ld. -rpath is always -rpath, so we list
921 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
922 N_("Add DIR to runtime search path"), N_("DIR"));
924 DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
925 N_("Add DIR to runtime search path"), N_("DIR"));
927 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
928 N_("Add DIR to link time shared library search path"),
931 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL,
932 N_("Layout sections in the order specified."),
935 DEFINE_special(section_start, options::TWO_DASHES, '\0',
936 N_("Set address of section"), N_("SECTION=ADDRESS"));
938 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL,
939 N_("Sort common symbols by alignment"),
940 N_("[={ascending,descending}]"));
942 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5,
943 N_("Dynamic tag slots to reserve (default 5)"),
946 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
947 N_("Strip all symbols"), NULL);
948 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
949 N_("Strip debugging information"), NULL);
950 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
951 N_("Emit only debug line number information"), NULL);
952 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
953 N_("Strip debug symbols that are unused by gdb "
954 "(at least versions <= 6.7)"), NULL);
955 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
956 N_("Strip LTO intermediate code sections"), NULL);
958 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
959 N_("(ARM only) The maximum distance from instructions in a group "
960 "of sections to their stubs. Negative values mean stubs "
961 "are always after the group. 1 means using default size.\n"),
964 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
965 N_("Use less memory and more disk I/O "
966 "(included only for compatibility with GNU ld)"), NULL);
968 DEFINE_bool(shared, options::ONE_DASH, 'G', false,
969 N_("Generate shared library"), NULL);
971 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
972 N_("Generate shared library"), NULL);
974 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
975 N_("Stack size when -fsplit-stack function calls non-split"),
978 // This is not actually special in any way, but I need to give it
979 // a non-standard accessor-function name because 'static' is a keyword.
980 DEFINE_special(static, options::ONE_DASH, '\0',
981 N_("Do not link against shared libraries"), NULL);
983 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
984 N_("Identical Code Folding. "
985 "\'--icf=safe\' Folds ctors, dtors and functions whose"
986 " pointers are definitely not taken."),
988 {"none", "all", "safe"});
990 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
991 N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
993 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
994 N_("List folded identical sections on stderr"),
995 N_("Do not list folded identical sections"));
997 DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
998 N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
1000 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
1001 N_("Remove unused sections"),
1002 N_("Don't remove unused sections (default)"));
1004 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
1005 N_("List removed unused sections on stderr"),
1006 N_("Do not list removed unused sections"));
1008 DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
1009 N_("Print resource usage statistics"), NULL);
1011 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
1012 N_("Set target system root directory"), N_("DIR"));
1014 DEFINE_bool(trace, options::TWO_DASHES, 't', false,
1015 N_("Print the name of each input file"), NULL);
1017 DEFINE_special(script, options::TWO_DASHES, 'T',
1018 N_("Read linker script"), N_("FILE"));
1020 DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
1021 N_("Run the linker multi-threaded"),
1022 N_("Do not run the linker multi-threaded"));
1023 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
1024 N_("Number of threads to use"), N_("COUNT"));
1025 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
1026 N_("Number of threads to use in initial pass"), N_("COUNT"));
1027 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
1028 N_("Number of threads to use in middle pass"), N_("COUNT"));
1029 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
1030 N_("Number of threads to use in final pass"), N_("COUNT"));
1032 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
1033 N_("Set the address of the bss segment"), N_("ADDRESS"));
1034 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
1035 N_("Set the address of the data segment"), N_("ADDRESS"));
1036 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
1037 N_("Set the address of the text segment"), N_("ADDRESS"));
1039 DEFINE_set(undefined, options::TWO_DASHES, 'u',
1040 N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
1042 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
1043 N_("Synonym for --debug=files"), NULL);
1045 DEFINE_special(version_script, options::TWO_DASHES, '\0',
1046 N_("Read version script"), N_("FILE"));
1048 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false,
1049 N_("Warn about duplicate common symbols"),
1050 N_("Do not warn about duplicate common symbols (default)"));
1052 DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
1053 N_("Ignored"), N_("Ignored"));
1055 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false,
1056 N_("Warn if the stack is executable"),
1057 N_("Do not warn if the stack is executable (default)"));
1059 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true,
1060 NULL, N_("Don't warn about mismatched input files"));
1062 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false,
1063 N_("Ignored"), NULL);
1065 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
1066 N_("Warn when skipping an incompatible library"),
1067 N_("Don't warn when skipping an incompatible library"));
1069 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false,
1070 N_("Warn if text segment is not shareable"),
1071 N_("Do not warn if text segment is not shareable (default)"));
1073 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false,
1074 N_("Report unresolved symbols as warnings"),
1076 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols,
1077 options::TWO_DASHES, '\0',
1078 N_("Report unresolved symbols as errors"),
1081 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL,
1082 N_("(ARM only) Do not warn about objects with incompatible "
1085 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
1086 N_("Include all archive contents"),
1087 N_("Include only needed archive contents"));
1089 DEFINE_set(wrap, options::TWO_DASHES, '\0',
1090 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
1092 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
1093 N_("Trace references to symbol"), N_("SYMBOL"));
1095 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true,
1096 N_("Allow unused version in script (default)"),
1097 N_("Do not allow unused version in script"));
1099 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
1100 N_("Default search path for Solaris compatibility"),
1103 DEFINE_special(start_group, options::TWO_DASHES, '(',
1104 N_("Start a library search group"), NULL);
1105 DEFINE_special(end_group, options::TWO_DASHES, ')',
1106 N_("End a library search group"), NULL);
1109 DEFINE_special(start_lib, options::TWO_DASHES, '\0',
1110 N_("Start a library"), NULL);
1111 DEFINE_special(end_lib, options::TWO_DASHES, '\0',
1112 N_("End a library "), NULL);
1116 DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
1117 N_("Sort dynamic relocs"),
1118 N_("Do not sort dynamic relocs"));
1119 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
1120 N_("Set common page size to SIZE"), N_("SIZE"));
1121 DEFINE_bool(defs, options::DASH_Z, '\0', false,
1122 N_("Report undefined symbols (even with --shared)"),
1124 DEFINE_bool(execstack, options::DASH_Z, '\0', false,
1125 N_("Mark output as requiring executable stack"), NULL);
1126 DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
1127 N_("Mark DSO to be initialized first at runtime"),
1129 DEFINE_bool(interpose, options::DASH_Z, '\0', false,
1130 N_("Mark object to interpose all DSOs but executable"),
1132 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0',
1133 N_("Mark object for lazy runtime binding (default)"),
1135 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
1136 N_("Mark object requiring immediate process"),
1138 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
1139 N_("Set maximum page size to SIZE"), N_("SIZE"));
1140 DEFINE_bool(muldefs, options::DASH_Z, '\0', false,
1141 N_("Allow multiple definitions of symbols"),
1143 // copyreloc is here in the list because there is only -z
1144 // nocopyreloc, not -z copyreloc.
1145 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
1147 N_("Do not create copy relocs"));
1148 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
1149 N_("Mark object not to use default search paths"),
1151 DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
1152 N_("Mark DSO non-deletable at runtime"),
1154 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
1155 N_("Mark DSO not available to dlopen"),
1157 DEFINE_bool(nodump, options::DASH_Z, '\0', false,
1158 N_("Mark DSO not available to dldump"),
1160 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
1161 N_("Mark output as not requiring executable stack"), NULL);
1162 DEFINE_bool(now, options::DASH_Z, '\0', false,
1163 N_("Mark object for immediate function binding"),
1165 DEFINE_bool(origin, options::DASH_Z, '\0', false,
1166 N_("Mark DSO to indicate that needs immediate $ORIGIN "
1167 "processing at runtime"), NULL);
1168 DEFINE_bool(relro, options::DASH_Z, '\0', false,
1169 N_("Where possible mark variables read-only after relocation"),
1170 N_("Don't mark variables read-only after relocation"));
1171 DEFINE_bool(text, options::DASH_Z, '\0', false,
1172 N_("Do not permit relocations in read-only segments"),
1173 N_("Permit relocations in read-only segments (default)"));
1174 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0',
1175 N_("Permit relocations in read-only segments (default)"),
1179 typedef options::Dir_list Dir_list;
1183 // Does post-processing on flags, making sure they all have
1184 // non-conflicting values. Also converts some flags from their
1185 // "standard" types (string, etc), to another type (enum, DirList),
1186 // which can be accessed via a separate method. Dies if it notices
1190 // True if we printed the version information.
1192 printed_version() const
1193 { return this->printed_version_; }
1195 // The macro defines output() (based on --output), but that's a
1196 // generic name. Provide this alternative name, which is clearer.
1198 output_file_name() const
1199 { return this->output(); }
1201 // This is not defined via a flag, but combines flags to say whether
1202 // the output is position-independent or not.
1204 output_is_position_independent() const
1205 { return this->shared() || this->pie(); }
1207 // Return true if the output is something that can be exec()ed, such
1208 // as a static executable, or a position-dependent or
1209 // position-independent executable, but not a dynamic library or an
1212 output_is_executable() const
1213 { return !this->shared() && !this->relocatable(); }
1215 // This would normally be static(), and defined automatically, but
1216 // since static is a keyword, we need to come up with our own name.
1221 // In addition to getting the input and output formats as a string
1222 // (via format() and oformat()), we also give access as an enum.
1227 // Straight binary format.
1228 OBJECT_FORMAT_BINARY
1231 // Convert a string to an Object_format. Gives an error if the
1232 // string is not recognized.
1233 static Object_format
1234 string_to_object_format(const char* arg);
1236 // Note: these functions are not very fast.
1237 Object_format format_enum() const;
1238 Object_format oformat_enum() const;
1240 // Return whether FILENAME is in a system directory.
1242 is_in_system_directory(const std::string& name) const;
1244 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
1246 should_retain_symbol(const char* symbol_name) const
1248 if (symbols_to_retain_.empty()) // means flag wasn't specified
1250 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
1253 // These are the best way to get access to the execstack state,
1254 // not execstack() and noexecstack() which are hard to use properly.
1256 is_execstack_set() const
1257 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
1260 is_stack_executable() const
1261 { return this->execstack_status_ == EXECSTACK_YES; }
1265 { return this->icf_status_ != ICF_NONE; }
1268 icf_safe_folding() const
1269 { return this->icf_status_ == ICF_SAFE; }
1271 // The --demangle option takes an optional string, and there is also
1272 // a --no-demangle option. This is the best way to decide whether
1273 // to demangle or not.
1276 { return this->do_demangle_; }
1278 // Returns TRUE if any plugin libraries have been loaded.
1281 { return this->plugins_ != NULL; }
1283 // Return a pointer to the plugin manager.
1286 { return this->plugins_; }
1288 // True iff SYMBOL was found in the file specified by dynamic-list.
1290 in_dynamic_list(const char* symbol) const
1291 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
1293 // Finalize the dynamic list.
1295 finalize_dynamic_list()
1296 { this->dynamic_list_.version_script_info()->finalize(); }
1298 // The mode selected by the --incremental options.
1299 enum Incremental_mode
1301 // No incremental linking (--no-incremental).
1303 // Incremental update only (--incremental-update).
1305 // Force a full link, but prepare for subsequent incremental link
1306 // (--incremental-full).
1308 // Incremental update if possible, fallback to full link (--incremental).
1312 // The incremental linking mode.
1314 incremental_mode() const
1315 { return this->incremental_mode_; }
1317 // The disposition given by the --incremental-changed,
1318 // --incremental-unchanged or --incremental-unknown option. The
1319 // value may change as we proceed parsing the command line flags.
1320 Incremental_disposition
1321 incremental_disposition() const
1322 { return this->incremental_disposition_; }
1324 // Return true if S is the name of a library excluded from automatic
1327 check_excluded_libs(const std::string &s) const;
1329 // If an explicit start address was given for section SECNAME with
1330 // the --section-start option, return true and set *PADDR to the
1331 // address. Otherwise return false.
1333 section_start(const char* secname, uint64_t* paddr) const;
1337 // Leave original instruction.
1339 // Replace instruction.
1341 // Generate an interworking veneer.
1342 FIX_V4BX_INTERWORKING
1347 { return (this->fix_v4bx_); }
1358 { return this->endianness_; }
1361 // Don't copy this structure.
1362 General_options(const General_options&);
1363 General_options& operator=(const General_options&);
1365 // Whether to mark the stack as executable.
1368 // Not set on command line.
1369 EXECSTACK_FROM_INPUT,
1370 // Mark the stack as executable (-z execstack).
1372 // Mark the stack as not executable (-z noexecstack).
1378 // Do not fold any functions (Default or --icf=none).
1380 // All functions are candidates for folding. (--icf=all).
1382 // Only ctors and dtors are candidates for folding. (--icf=safe).
1387 set_icf_status(Icf_status value)
1388 { this->icf_status_ = value; }
1391 set_execstack_status(Execstack value)
1392 { this->execstack_status_ = value; }
1395 set_do_demangle(bool value)
1396 { this->do_demangle_ = value; }
1399 set_static(bool value)
1400 { static_ = value; }
1402 // These are called by finalize() to set up the search-path correctly.
1404 add_to_library_path_with_sysroot(const char* arg)
1405 { this->add_search_directory_to_library_path(Search_directory(arg, true)); }
1407 // Apply any sysroot to the directory lists.
1411 // Add a plugin and its arguments to the list of plugins.
1413 add_plugin(const char* filename);
1415 // Add a plugin option.
1417 add_plugin_option(const char* opt);
1419 // Whether we printed version information.
1420 bool printed_version_;
1421 // Whether to mark the stack as executable.
1422 Execstack execstack_status_;
1423 // Whether to do code folding.
1424 Icf_status icf_status_;
1425 // Whether to do a static link.
1427 // Whether to do demangling.
1429 // List of plugin libraries.
1430 Plugin_manager* plugins_;
1431 // The parsed output of --dynamic-list files. For convenience in
1432 // script.cc, we store this as a Script_options object, even though
1433 // we only use a single Version_tree from it.
1434 Script_options dynamic_list_;
1435 // The incremental linking mode.
1436 Incremental_mode incremental_mode_;
1437 // The disposition given by the --incremental-changed,
1438 // --incremental-unchanged or --incremental-unknown option. The
1439 // value may change as we proceed parsing the command line flags.
1440 Incremental_disposition incremental_disposition_;
1441 // Whether we have seen one of the options that require incremental
1442 // build (--incremental-changed, --incremental-unchanged or
1443 // --incremental-unknown)
1444 bool implicit_incremental_;
1445 // Libraries excluded from automatic export, via --exclude-libs.
1446 Unordered_set<std::string> excluded_libs_;
1447 // List of symbol-names to keep, via -retain-symbol-info.
1448 Unordered_set<std::string> symbols_to_retain_;
1449 // Map from section name to address from --section-start.
1450 std::map<std::string, uint64_t> section_starts_;
1451 // Whether to process armv4 bx instruction relocation.
1454 Endianness endianness_;
1457 // The position-dependent options. We use this to store the state of
1458 // the commandline at a particular point in parsing for later
1459 // reference. For instance, if we see "ld --whole-archive foo.a
1460 // --no-whole-archive," we want to store the whole-archive option with
1461 // foo.a, so when the time comes to parse foo.a we know we should do
1462 // it in whole-archive mode. We could store all of General_options,
1463 // but that's big, so we just pick the subset of flags that actually
1464 // change in a position-dependent way.
1466 #define DEFINE_posdep(varname__, type__) \
1470 { return this->varname__##_; } \
1473 set_##varname__(type__ value) \
1474 { this->varname__##_ = value; } \
1478 class Position_dependent_options
1481 Position_dependent_options(const General_options& options
1482 = Position_dependent_options::default_options_)
1483 { copy_from_options(options); }
1485 void copy_from_options(const General_options& options)
1487 this->set_as_needed(options.as_needed());
1488 this->set_Bdynamic(options.Bdynamic());
1489 this->set_format_enum(options.format_enum());
1490 this->set_whole_archive(options.whole_archive());
1491 this->set_incremental_disposition(options.incremental_disposition());
1494 DEFINE_posdep(as_needed, bool);
1495 DEFINE_posdep(Bdynamic, bool);
1496 DEFINE_posdep(format_enum, General_options::Object_format);
1497 DEFINE_posdep(whole_archive, bool);
1498 DEFINE_posdep(incremental_disposition, Incremental_disposition);
1501 // This is a General_options with everything set to its default
1502 // value. A Position_dependent_options created with no argument
1503 // will take its values from here.
1504 static General_options default_options_;
1508 // A single file or library argument from the command line.
1510 class Input_file_argument
1513 enum Input_file_type
1515 // A regular file, name used as-is, not searched.
1516 INPUT_FILE_TYPE_FILE,
1517 // A library name. When used, "lib" will be prepended and ".so" or
1518 // ".a" appended to make a filename, and that filename will be searched
1519 // for using the -L paths.
1520 INPUT_FILE_TYPE_LIBRARY,
1521 // A regular file, name used as-is, but searched using the -L paths.
1522 INPUT_FILE_TYPE_SEARCHED_FILE
1525 // name: file name or library name
1526 // type: the type of this input file.
1527 // extra_search_path: an extra directory to look for the file, prior
1528 // to checking the normal library search path. If this is "",
1529 // then no extra directory is added.
1530 // just_symbols: whether this file only defines symbols.
1531 // options: The position dependent options at this point in the
1532 // command line, such as --whole-archive.
1533 Input_file_argument()
1534 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
1535 just_symbols_(false), options_(), arg_serial_(0)
1538 Input_file_argument(const char* name, Input_file_type type,
1539 const char* extra_search_path,
1541 const Position_dependent_options& options)
1542 : name_(name), type_(type), extra_search_path_(extra_search_path),
1543 just_symbols_(just_symbols), options_(options), arg_serial_(0)
1546 // You can also pass in a General_options instance instead of a
1547 // Position_dependent_options. In that case, we extract the
1548 // position-independent vars from the General_options and only store
1550 Input_file_argument(const char* name, Input_file_type type,
1551 const char* extra_search_path,
1553 const General_options& options)
1554 : name_(name), type_(type), extra_search_path_(extra_search_path),
1555 just_symbols_(just_symbols), options_(options), arg_serial_(0)
1560 { return this->name_.c_str(); }
1562 const Position_dependent_options&
1564 { return this->options_; }
1568 { return type_ == INPUT_FILE_TYPE_LIBRARY; }
1571 is_searched_file() const
1572 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
1575 extra_search_path() const
1577 return (this->extra_search_path_.empty()
1579 : this->extra_search_path_.c_str());
1582 // Return whether we should only read symbols from this file.
1584 just_symbols() const
1585 { return this->just_symbols_; }
1587 // Return whether this file may require a search using the -L
1590 may_need_search() const
1592 return (this->is_lib()
1593 || this->is_searched_file()
1594 || !this->extra_search_path_.empty());
1597 // Set the serial number for this argument.
1599 set_arg_serial(unsigned int arg_serial)
1600 { this->arg_serial_ = arg_serial; }
1602 // Get the serial number.
1605 { return this->arg_serial_; }
1608 // We use std::string, not const char*, here for convenience when
1609 // using script files, so that we do not have to preserve the string
1612 Input_file_type type_;
1613 std::string extra_search_path_;
1615 Position_dependent_options options_;
1616 // A unique index for this file argument in the argument list.
1617 unsigned int arg_serial_;
1620 // A file or library, or a group, from the command line.
1622 class Input_argument
1625 // Create a file or library argument.
1626 explicit Input_argument(Input_file_argument file)
1627 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL)
1630 // Create a group argument.
1631 explicit Input_argument(Input_file_group* group)
1632 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL)
1635 // Create a lib argument.
1636 explicit Input_argument(Input_file_lib* lib)
1637 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL)
1640 // Return whether this is a file.
1643 { return this->is_file_; }
1645 // Return whether this is a group.
1648 { return !this->is_file_ && this->lib_ == NULL; }
1650 // Return whether this is a lib.
1653 { return this->lib_ != NULL; }
1655 // Return the information about the file.
1656 const Input_file_argument&
1659 gold_assert(this->is_file_);
1663 // Return the information about the group.
1664 const Input_file_group*
1667 gold_assert(!this->is_file_);
1668 return this->group_;
1674 gold_assert(!this->is_file_);
1675 return this->group_;
1678 // Return the information about the lib.
1679 const Input_file_lib*
1682 gold_assert(!this->is_file_);
1683 gold_assert(this->lib_);
1690 gold_assert(!this->is_file_);
1691 gold_assert(this->lib_);
1695 // If a script generated this argument, store a pointer to the script info.
1696 // Currently used only for recording incremental link information.
1698 set_script_info(Script_info* info)
1699 { this->script_info_ = info; }
1703 { return this->script_info_; }
1707 Input_file_argument file_;
1708 Input_file_group* group_;
1709 Input_file_lib* lib_;
1710 Script_info* script_info_;
1713 typedef std::vector<Input_argument> Input_argument_list;
1715 // A group from the command line. This is a set of arguments within
1716 // --start-group ... --end-group.
1718 class Input_file_group
1721 typedef Input_argument_list::const_iterator const_iterator;
1727 // Add a file to the end of the group.
1729 add_file(const Input_file_argument& arg)
1731 this->files_.push_back(Input_argument(arg));
1732 return this->files_.back();
1735 // Iterators to iterate over the group contents.
1739 { return this->files_.begin(); }
1743 { return this->files_.end(); }
1746 Input_argument_list files_;
1749 // A lib from the command line. This is a set of arguments within
1750 // --start-lib ... --end-lib.
1752 class Input_file_lib
1755 typedef Input_argument_list::const_iterator const_iterator;
1757 Input_file_lib(const Position_dependent_options& options)
1758 : files_(), options_(options)
1761 // Add a file to the end of the lib.
1763 add_file(const Input_file_argument& arg)
1765 this->files_.push_back(Input_argument(arg));
1766 return this->files_.back();
1769 const Position_dependent_options&
1771 { return this->options_; }
1773 // Iterators to iterate over the lib contents.
1777 { return this->files_.begin(); }
1781 { return this->files_.end(); }
1785 { return this->files_.size(); }
1788 Input_argument_list files_;
1789 Position_dependent_options options_;
1792 // A list of files from the command line or a script.
1794 class Input_arguments
1797 typedef Input_argument_list::const_iterator const_iterator;
1800 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0)
1805 add_file(Input_file_argument& arg);
1807 // Start a group (the --start-group option).
1811 // End a group (the --end-group option).
1815 // Start a lib (the --start-lib option).
1817 start_lib(const Position_dependent_options&);
1819 // End a lib (the --end-lib option).
1823 // Return whether we are currently in a group.
1826 { return this->in_group_; }
1828 // Return whether we are currently in a lib.
1831 { return this->in_lib_; }
1833 // The number of entries in the list.
1836 { return this->input_argument_list_.size(); }
1838 // Iterators to iterate over the list of input files.
1842 { return this->input_argument_list_.begin(); }
1846 { return this->input_argument_list_.end(); }
1848 // Return whether the list is empty.
1851 { return this->input_argument_list_.empty(); }
1853 // Return the number of input files. This may be larger than
1854 // input_argument_list_.size(), because of files that are part
1855 // of groups or libs.
1857 number_of_input_files() const
1858 { return this->file_count_; }
1861 Input_argument_list input_argument_list_;
1864 unsigned int file_count_;
1868 // All the information read from the command line. These are held in
1869 // three separate structs: one to hold the options (--foo), one to
1870 // hold the filenames listed on the commandline, and one to hold
1871 // linker script information. This third is not a subset of the other
1872 // two because linker scripts can be specified either as options (via
1873 // -T) or as a file.
1878 typedef Input_arguments::const_iterator const_iterator;
1882 // Process the command line options. This will exit with an
1883 // appropriate error message if an unrecognized option is seen.
1885 process(int argc, const char** argv);
1887 // Process one command-line option. This takes the index of argv to
1888 // process, and returns the index for the next option. no_more_options
1889 // is set to true if argv[i] is "--".
1891 process_one_option(int argc, const char** argv, int i,
1892 bool* no_more_options);
1894 // Get the general options.
1895 const General_options&
1897 { return this->options_; }
1899 // Get the position dependent options.
1900 const Position_dependent_options&
1901 position_dependent_options() const
1902 { return this->position_options_; }
1904 // Get the linker-script options.
1907 { return this->script_options_; }
1909 // Finalize the version-script options and return them.
1910 const Version_script_info&
1913 // Get the input files.
1916 { return this->inputs_; }
1918 // The number of input files.
1920 number_of_input_files() const
1921 { return this->inputs_.number_of_input_files(); }
1923 // Iterators to iterate over the list of input files.
1927 { return this->inputs_.begin(); }
1931 { return this->inputs_.end(); }
1934 Command_line(const Command_line&);
1935 Command_line& operator=(const Command_line&);
1937 // This is a dummy class to provide a constructor that runs before
1938 // the constructor for the General_options. The Pre_options constructor
1939 // is used as a hook to set the flag enabling the options to register
1941 struct Pre_options {
1945 // This must come before options_!
1946 Pre_options pre_options_;
1947 General_options options_;
1948 Position_dependent_options position_options_;
1949 Script_options script_options_;
1950 Input_arguments inputs_;
1953 } // End namespace gold.
1955 #endif // !defined(GOLD_OPTIONS_H)