1 // options.h -- handle command line options for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008, 2009, 2010 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(define_common, options::TWO_DASHES, 'd', false,
667 N_("Define common symbols"),
668 N_("Do not define common symbols"));
669 DEFINE_bool(dc, options::ONE_DASH, '\0', false,
670 N_("Alias for -d"), NULL);
671 DEFINE_bool(dp, options::ONE_DASH, '\0', false,
672 N_("Alias for -d"), NULL);
674 DEFINE_string(debug, options::TWO_DASHES, '\0', "",
675 N_("Turn on debugging"),
676 N_("[all,files,script,task][,...]"));
678 DEFINE_special(defsym, options::TWO_DASHES, '\0',
679 N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
681 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
682 N_("Demangle C++ symbols in log messages"),
685 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
686 N_("Do not demangle C++ symbols in log messages"),
689 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
690 N_("Look for violations of the C++ One Definition Rule"),
691 N_("Do not look for violations of the C++ One Definition Rule"));
693 DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false,
694 N_("Delete all local symbols"), NULL);
695 DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
696 N_("Delete all temporary local symbols"), NULL);
698 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
699 N_("Add data symbols to dynamic symbols"), NULL);
701 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
702 N_("Add C++ operator new/delete to dynamic symbols"), NULL);
704 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
705 N_("Add C++ typeinfo to dynamic symbols"), NULL);
707 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
708 N_("Read a list of dynamic symbols"), N_("FILE"));
710 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
711 N_("Set program start address"), N_("ADDRESS"));
713 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
714 N_("Exclude libraries from automatic export"),
715 N_(("lib,lib ...")));
717 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
718 N_("Export all dynamic symbols"),
719 N_("Do not export all dynamic symbols (default)"));
721 DEFINE_special(EB, options::ONE_DASH, '\0',
722 N_("Link big-endian objects."), NULL);
724 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
725 N_("Create exception frame header"), NULL);
727 DEFINE_special(EL, options::ONE_DASH, '\0',
728 N_("Link little-endian objects."), NULL);
730 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL,
731 N_("(ARM only) Do not warn about objects with incompatible "
734 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
735 N_("Treat warnings as errors"),
736 N_("Do not treat warnings as errors"));
738 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
739 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
741 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false,
742 N_("(ARM only) Fix binaries for Cortex-A8 erratum."),
743 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum."));
745 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true,
746 N_("(ARM only) Merge exidx entries in debuginfo."),
747 N_("(ARM only) Do not merge exidx entries in debuginfo."));
749 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0',
750 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"),
753 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0',
754 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking "
758 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
759 N_("Ignored"), NULL);
761 DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
762 N_("Set shared library name"), N_("FILENAME"));
764 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
765 N_("Min fraction of empty buckets in dynamic hash"),
768 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
769 N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
770 {"sysv", "gnu", "both"});
772 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
773 N_("Set dynamic linker path"), N_("PROGRAM"));
775 DEFINE_special(incremental, options::TWO_DASHES, '\0',
776 N_("Do an incremental link if possible; "
777 "otherwise, do a full link and prepare output "
778 "for incremental linking"), NULL);
780 DEFINE_special(no_incremental, options::TWO_DASHES, '\0',
781 N_("Do a full link (default)"), NULL);
783 DEFINE_special(incremental_full, options::TWO_DASHES, '\0',
784 N_("Do a full link and "
785 "prepare output for incremental linking"), NULL);
787 DEFINE_special(incremental_update, options::TWO_DASHES, '\0',
788 N_("Do an incremental link; exit if not possible"), NULL);
790 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL,
791 N_("Set base file for incremental linking"
792 " (default is output file)"),
795 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
796 N_("Assume files changed"), NULL);
798 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
799 N_("Assume files didn't change"), NULL);
801 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
802 N_("Use timestamps to check files (default)"), NULL);
804 DEFINE_string(init, options::ONE_DASH, '\0', "_init",
805 N_("Call SYMBOL at load-time"), N_("SYMBOL"));
807 DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
808 N_("Read only symbol values from FILE"), N_("FILE"));
810 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0',
812 N_("Map whole files to memory (default on 64-bit hosts)"),
813 N_("Map relevant file parts to memory (default on 32-bit "
815 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true,
816 N_("Keep files mapped across passes (default)"),
817 N_("Release mapped files after each pass"));
819 DEFINE_special(library, options::TWO_DASHES, 'l',
820 N_("Search for library LIBNAME"), N_("LIBNAME"));
822 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
823 N_("Add directory to search path"), N_("DIR"));
825 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false,
826 N_(" Only search directories specified on the command line."),
829 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false,
830 N_(" Put read-only non-executable sections in their own segment"),
833 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
834 N_("Ignored for compatibility"), N_("EMULATION"));
836 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
837 N_("Write map file on standard output"), NULL);
838 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
841 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
842 N_("Do not page align data"), NULL);
843 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
844 N_("Do not page align data, do not make text readonly"),
845 N_("Page align data, make text readonly"));
847 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false,
848 N_("Enable use of DT_RUNPATH and DT_FLAGS"),
849 N_("Disable use of DT_RUNPATH and DT_FLAGS"));
851 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
852 N_("Create an output file even if errors occur"), NULL);
854 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
855 N_("Report undefined symbols (even with --shared)"),
858 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
859 N_("Set output file name"), N_("FILE"));
861 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
862 N_("Optimize output file size"), N_("LEVEL"));
864 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
865 N_("Set output format"), N_("[binary]"));
867 DEFINE_bool(p, options::ONE_DASH, '\0', false,
868 N_("(ARM only) Ignore for backward compatibility"), NULL);
870 DEFINE_bool(pie, options::ONE_DASH, '\0', false,
871 N_("Create a position independent executable"), NULL);
872 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
873 N_("Create a position independent executable"), NULL,
876 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false,
877 NULL, N_("(ARM only) Ignore for backward compatibility"));
879 #ifdef ENABLE_PLUGINS
880 DEFINE_special(plugin, options::TWO_DASHES, '\0',
881 N_("Load a plugin library"), N_("PLUGIN"));
882 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
883 N_("Pass an option to the plugin"), N_("OPTION"));
886 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
887 N_("Preread archive symbols when multi-threaded"), NULL);
889 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
890 N_("Print symbols defined and used for each input"),
893 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
894 N_("Ignored for SVR4 compatibility"), NULL);
896 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
897 N_("Generate relocations in output"), NULL);
899 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
900 N_("Generate relocatable output"), NULL);
901 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0',
902 N_("Synonym for -r"), NULL, false);
904 DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
905 N_("Relax branches on certain targets"), NULL);
907 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL,
908 N_("keep only symbols listed in this file"), N_("FILE"));
910 // -R really means -rpath, but can mean --just-symbols for
911 // compatibility with GNU ld. -rpath is always -rpath, so we list
913 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
914 N_("Add DIR to runtime search path"), N_("DIR"));
916 DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
917 N_("Add DIR to runtime search path"), N_("DIR"));
919 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
920 N_("Add DIR to link time shared library search path"),
923 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL,
924 N_("Layout sections in the order specified."),
927 DEFINE_special(section_start, options::TWO_DASHES, '\0',
928 N_("Set address of section"), N_("SECTION=ADDRESS"));
930 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL,
931 N_("Sort common symbols by alignment"),
932 N_("[={ascending,descending}]"));
934 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5,
935 N_("Dynamic tag slots to reserve (default 5)"),
938 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
939 N_("Strip all symbols"), NULL);
940 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
941 N_("Strip debugging information"), NULL);
942 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
943 N_("Emit only debug line number information"), NULL);
944 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
945 N_("Strip debug symbols that are unused by gdb "
946 "(at least versions <= 6.7)"), NULL);
947 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
948 N_("Strip LTO intermediate code sections"), NULL);
950 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
951 N_("(ARM only) The maximum distance from instructions in a group "
952 "of sections to their stubs. Negative values mean stubs "
953 "are always after the group. 1 means using default size.\n"),
956 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
957 N_("Use less memory and more disk I/O "
958 "(included only for compatibility with GNU ld)"), NULL);
960 DEFINE_bool(shared, options::ONE_DASH, 'G', false,
961 N_("Generate shared library"), NULL);
963 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
964 N_("Generate shared library"), NULL);
966 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
967 N_("Stack size when -fsplit-stack function calls non-split"),
970 // This is not actually special in any way, but I need to give it
971 // a non-standard accessor-function name because 'static' is a keyword.
972 DEFINE_special(static, options::ONE_DASH, '\0',
973 N_("Do not link against shared libraries"), NULL);
975 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
976 N_("Identical Code Folding. "
977 "\'--icf=safe\' Folds ctors, dtors and functions whose"
978 " pointers are definitely not taken."),
980 {"none", "all", "safe"});
982 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
983 N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
985 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
986 N_("List folded identical sections on stderr"),
987 N_("Do not list folded identical sections"));
989 DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
990 N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
992 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
993 N_("Remove unused sections"),
994 N_("Don't remove unused sections (default)"));
996 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
997 N_("List removed unused sections on stderr"),
998 N_("Do not list removed unused sections"));
1000 DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
1001 N_("Print resource usage statistics"), NULL);
1003 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
1004 N_("Set target system root directory"), N_("DIR"));
1006 DEFINE_bool(trace, options::TWO_DASHES, 't', false,
1007 N_("Print the name of each input file"), NULL);
1009 DEFINE_special(script, options::TWO_DASHES, 'T',
1010 N_("Read linker script"), N_("FILE"));
1012 DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
1013 N_("Run the linker multi-threaded"),
1014 N_("Do not run the linker multi-threaded"));
1015 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
1016 N_("Number of threads to use"), N_("COUNT"));
1017 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
1018 N_("Number of threads to use in initial pass"), N_("COUNT"));
1019 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
1020 N_("Number of threads to use in middle pass"), N_("COUNT"));
1021 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
1022 N_("Number of threads to use in final pass"), N_("COUNT"));
1024 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
1025 N_("Set the address of the bss segment"), N_("ADDRESS"));
1026 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
1027 N_("Set the address of the data segment"), N_("ADDRESS"));
1028 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
1029 N_("Set the address of the text segment"), N_("ADDRESS"));
1031 DEFINE_set(undefined, options::TWO_DASHES, 'u',
1032 N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
1034 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
1035 N_("Synonym for --debug=files"), NULL);
1037 DEFINE_special(version_script, options::TWO_DASHES, '\0',
1038 N_("Read version script"), N_("FILE"));
1040 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false,
1041 N_("Warn about duplicate common symbols"),
1042 N_("Do not warn about duplicate common symbols (default)"));
1044 DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
1045 N_("Ignored"), N_("Ignored"));
1047 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false,
1048 N_("Warn if the stack is executable"),
1049 N_("Do not warn if the stack is executable (default)"));
1051 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true,
1052 NULL, N_("Don't warn about mismatched input files"));
1054 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false,
1055 N_("Ignored"), NULL);
1057 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
1058 N_("Warn when skipping an incompatible library"),
1059 N_("Don't warn when skipping an incompatible library"));
1061 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false,
1062 N_("Warn if text segment is not shareable"),
1063 N_("Do not warn if text segment is not shareable (default)"));
1065 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false,
1066 N_("Report unresolved symbols as warnings"),
1068 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols,
1069 options::TWO_DASHES, '\0',
1070 N_("Report unresolved symbols as errors"),
1073 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL,
1074 N_("(ARM only) Do not warn about objects with incompatible "
1077 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
1078 N_("Include all archive contents"),
1079 N_("Include only needed archive contents"));
1081 DEFINE_set(wrap, options::TWO_DASHES, '\0',
1082 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
1084 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
1085 N_("Trace references to symbol"), N_("SYMBOL"));
1087 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true,
1088 N_("Allow unused version in script (default)"),
1089 N_("Do not allow unused version in script"));
1091 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
1092 N_("Default search path for Solaris compatibility"),
1095 DEFINE_special(start_group, options::TWO_DASHES, '(',
1096 N_("Start a library search group"), NULL);
1097 DEFINE_special(end_group, options::TWO_DASHES, ')',
1098 N_("End a library search group"), NULL);
1101 DEFINE_special(start_lib, options::TWO_DASHES, '\0',
1102 N_("Start a library"), NULL);
1103 DEFINE_special(end_lib, options::TWO_DASHES, '\0',
1104 N_("End a library "), NULL);
1108 DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
1109 N_("Sort dynamic relocs"),
1110 N_("Do not sort dynamic relocs"));
1111 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
1112 N_("Set common page size to SIZE"), N_("SIZE"));
1113 DEFINE_bool(defs, options::DASH_Z, '\0', false,
1114 N_("Report undefined symbols (even with --shared)"),
1116 DEFINE_bool(execstack, options::DASH_Z, '\0', false,
1117 N_("Mark output as requiring executable stack"), NULL);
1118 DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
1119 N_("Mark DSO to be initialized first at runtime"),
1121 DEFINE_bool(interpose, options::DASH_Z, '\0', false,
1122 N_("Mark object to interpose all DSOs but executable"),
1124 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0',
1125 N_("Mark object for lazy runtime binding (default)"),
1127 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
1128 N_("Mark object requiring immediate process"),
1130 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
1131 N_("Set maximum page size to SIZE"), N_("SIZE"));
1132 DEFINE_bool(muldefs, options::DASH_Z, '\0', false,
1133 N_("Allow multiple definitions of symbols"),
1135 // copyreloc is here in the list because there is only -z
1136 // nocopyreloc, not -z copyreloc.
1137 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
1139 N_("Do not create copy relocs"));
1140 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
1141 N_("Mark object not to use default search paths"),
1143 DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
1144 N_("Mark DSO non-deletable at runtime"),
1146 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
1147 N_("Mark DSO not available to dlopen"),
1149 DEFINE_bool(nodump, options::DASH_Z, '\0', false,
1150 N_("Mark DSO not available to dldump"),
1152 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
1153 N_("Mark output as not requiring executable stack"), NULL);
1154 DEFINE_bool(now, options::DASH_Z, '\0', false,
1155 N_("Mark object for immediate function binding"),
1157 DEFINE_bool(origin, options::DASH_Z, '\0', false,
1158 N_("Mark DSO to indicate that needs immediate $ORIGIN "
1159 "processing at runtime"), NULL);
1160 DEFINE_bool(relro, options::DASH_Z, '\0', false,
1161 N_("Where possible mark variables read-only after relocation"),
1162 N_("Don't mark variables read-only after relocation"));
1163 DEFINE_bool(text, options::DASH_Z, '\0', false,
1164 N_("Do not permit relocations in read-only segments"),
1166 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0',
1167 N_("Permit relocations in read-only segments (default)"),
1171 typedef options::Dir_list Dir_list;
1175 // Does post-processing on flags, making sure they all have
1176 // non-conflicting values. Also converts some flags from their
1177 // "standard" types (string, etc), to another type (enum, DirList),
1178 // which can be accessed via a separate method. Dies if it notices
1182 // True if we printed the version information.
1184 printed_version() const
1185 { return this->printed_version_; }
1187 // The macro defines output() (based on --output), but that's a
1188 // generic name. Provide this alternative name, which is clearer.
1190 output_file_name() const
1191 { return this->output(); }
1193 // This is not defined via a flag, but combines flags to say whether
1194 // the output is position-independent or not.
1196 output_is_position_independent() const
1197 { return this->shared() || this->pie(); }
1199 // Return true if the output is something that can be exec()ed, such
1200 // as a static executable, or a position-dependent or
1201 // position-independent executable, but not a dynamic library or an
1204 output_is_executable() const
1205 { return !this->shared() && !this->relocatable(); }
1207 // This would normally be static(), and defined automatically, but
1208 // since static is a keyword, we need to come up with our own name.
1213 // In addition to getting the input and output formats as a string
1214 // (via format() and oformat()), we also give access as an enum.
1219 // Straight binary format.
1220 OBJECT_FORMAT_BINARY
1223 // Convert a string to an Object_format. Gives an error if the
1224 // string is not recognized.
1225 static Object_format
1226 string_to_object_format(const char* arg);
1228 // Note: these functions are not very fast.
1229 Object_format format_enum() const;
1230 Object_format oformat_enum() const;
1232 // Return whether FILENAME is in a system directory.
1234 is_in_system_directory(const std::string& name) const;
1236 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
1238 should_retain_symbol(const char* symbol_name) const
1240 if (symbols_to_retain_.empty()) // means flag wasn't specified
1242 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
1245 // These are the best way to get access to the execstack state,
1246 // not execstack() and noexecstack() which are hard to use properly.
1248 is_execstack_set() const
1249 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
1252 is_stack_executable() const
1253 { return this->execstack_status_ == EXECSTACK_YES; }
1257 { return this->icf_status_ != ICF_NONE; }
1260 icf_safe_folding() const
1261 { return this->icf_status_ == ICF_SAFE; }
1263 // The --demangle option takes an optional string, and there is also
1264 // a --no-demangle option. This is the best way to decide whether
1265 // to demangle or not.
1268 { return this->do_demangle_; }
1270 // Returns TRUE if any plugin libraries have been loaded.
1273 { return this->plugins_ != NULL; }
1275 // Return a pointer to the plugin manager.
1278 { return this->plugins_; }
1280 // True iff SYMBOL was found in the file specified by dynamic-list.
1282 in_dynamic_list(const char* symbol) const
1283 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
1285 // Finalize the dynamic list.
1287 finalize_dynamic_list()
1288 { this->dynamic_list_.version_script_info()->finalize(); }
1290 // The mode selected by the --incremental options.
1291 enum Incremental_mode
1293 // No incremental linking (--no-incremental).
1295 // Incremental update only (--incremental-update).
1297 // Force a full link, but prepare for subsequent incremental link
1298 // (--incremental-full).
1300 // Incremental update if possible, fallback to full link (--incremental).
1304 // The incremental linking mode.
1306 incremental_mode() const
1307 { return this->incremental_mode_; }
1309 // The disposition given by the --incremental-changed,
1310 // --incremental-unchanged or --incremental-unknown option. The
1311 // value may change as we proceed parsing the command line flags.
1312 Incremental_disposition
1313 incremental_disposition() const
1314 { return this->incremental_disposition_; }
1316 // Return true if S is the name of a library excluded from automatic
1319 check_excluded_libs(const std::string &s) const;
1321 // If an explicit start address was given for section SECNAME with
1322 // the --section-start option, return true and set *PADDR to the
1323 // address. Otherwise return false.
1325 section_start(const char* secname, uint64_t* paddr) const;
1329 // Leave original instruction.
1331 // Replace instruction.
1333 // Generate an interworking veneer.
1334 FIX_V4BX_INTERWORKING
1339 { return (this->fix_v4bx_); }
1350 { return this->endianness_; }
1353 // Don't copy this structure.
1354 General_options(const General_options&);
1355 General_options& operator=(const General_options&);
1357 // Whether to mark the stack as executable.
1360 // Not set on command line.
1361 EXECSTACK_FROM_INPUT,
1362 // Mark the stack as executable (-z execstack).
1364 // Mark the stack as not executable (-z noexecstack).
1370 // Do not fold any functions (Default or --icf=none).
1372 // All functions are candidates for folding. (--icf=all).
1374 // Only ctors and dtors are candidates for folding. (--icf=safe).
1379 set_icf_status(Icf_status value)
1380 { this->icf_status_ = value; }
1383 set_execstack_status(Execstack value)
1384 { this->execstack_status_ = value; }
1387 set_do_demangle(bool value)
1388 { this->do_demangle_ = value; }
1391 set_static(bool value)
1392 { static_ = value; }
1394 // These are called by finalize() to set up the search-path correctly.
1396 add_to_library_path_with_sysroot(const char* arg)
1397 { this->add_search_directory_to_library_path(Search_directory(arg, true)); }
1399 // Apply any sysroot to the directory lists.
1403 // Add a plugin and its arguments to the list of plugins.
1405 add_plugin(const char* filename);
1407 // Add a plugin option.
1409 add_plugin_option(const char* opt);
1411 // Whether we printed version information.
1412 bool printed_version_;
1413 // Whether to mark the stack as executable.
1414 Execstack execstack_status_;
1415 // Whether to do code folding.
1416 Icf_status icf_status_;
1417 // Whether to do a static link.
1419 // Whether to do demangling.
1421 // List of plugin libraries.
1422 Plugin_manager* plugins_;
1423 // The parsed output of --dynamic-list files. For convenience in
1424 // script.cc, we store this as a Script_options object, even though
1425 // we only use a single Version_tree from it.
1426 Script_options dynamic_list_;
1427 // The incremental linking mode.
1428 Incremental_mode incremental_mode_;
1429 // The disposition given by the --incremental-changed,
1430 // --incremental-unchanged or --incremental-unknown option. The
1431 // value may change as we proceed parsing the command line flags.
1432 Incremental_disposition incremental_disposition_;
1433 // Whether we have seen one of the options that require incremental
1434 // build (--incremental-changed, --incremental-unchanged or
1435 // --incremental-unknown)
1436 bool implicit_incremental_;
1437 // Libraries excluded from automatic export, via --exclude-libs.
1438 Unordered_set<std::string> excluded_libs_;
1439 // List of symbol-names to keep, via -retain-symbol-info.
1440 Unordered_set<std::string> symbols_to_retain_;
1441 // Map from section name to address from --section-start.
1442 std::map<std::string, uint64_t> section_starts_;
1443 // Whether to process armv4 bx instruction relocation.
1446 Endianness endianness_;
1449 // The position-dependent options. We use this to store the state of
1450 // the commandline at a particular point in parsing for later
1451 // reference. For instance, if we see "ld --whole-archive foo.a
1452 // --no-whole-archive," we want to store the whole-archive option with
1453 // foo.a, so when the time comes to parse foo.a we know we should do
1454 // it in whole-archive mode. We could store all of General_options,
1455 // but that's big, so we just pick the subset of flags that actually
1456 // change in a position-dependent way.
1458 #define DEFINE_posdep(varname__, type__) \
1462 { return this->varname__##_; } \
1465 set_##varname__(type__ value) \
1466 { this->varname__##_ = value; } \
1470 class Position_dependent_options
1473 Position_dependent_options(const General_options& options
1474 = Position_dependent_options::default_options_)
1475 { copy_from_options(options); }
1477 void copy_from_options(const General_options& options)
1479 this->set_as_needed(options.as_needed());
1480 this->set_Bdynamic(options.Bdynamic());
1481 this->set_format_enum(options.format_enum());
1482 this->set_whole_archive(options.whole_archive());
1483 this->set_incremental_disposition(options.incremental_disposition());
1486 DEFINE_posdep(as_needed, bool);
1487 DEFINE_posdep(Bdynamic, bool);
1488 DEFINE_posdep(format_enum, General_options::Object_format);
1489 DEFINE_posdep(whole_archive, bool);
1490 DEFINE_posdep(incremental_disposition, Incremental_disposition);
1493 // This is a General_options with everything set to its default
1494 // value. A Position_dependent_options created with no argument
1495 // will take its values from here.
1496 static General_options default_options_;
1500 // A single file or library argument from the command line.
1502 class Input_file_argument
1505 enum Input_file_type
1507 // A regular file, name used as-is, not searched.
1508 INPUT_FILE_TYPE_FILE,
1509 // A library name. When used, "lib" will be prepended and ".so" or
1510 // ".a" appended to make a filename, and that filename will be searched
1511 // for using the -L paths.
1512 INPUT_FILE_TYPE_LIBRARY,
1513 // A regular file, name used as-is, but searched using the -L paths.
1514 INPUT_FILE_TYPE_SEARCHED_FILE
1517 // name: file name or library name
1518 // type: the type of this input file.
1519 // extra_search_path: an extra directory to look for the file, prior
1520 // to checking the normal library search path. If this is "",
1521 // then no extra directory is added.
1522 // just_symbols: whether this file only defines symbols.
1523 // options: The position dependent options at this point in the
1524 // command line, such as --whole-archive.
1525 Input_file_argument()
1526 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
1527 just_symbols_(false), options_(), arg_serial_(0)
1530 Input_file_argument(const char* name, Input_file_type type,
1531 const char* extra_search_path,
1533 const Position_dependent_options& options)
1534 : name_(name), type_(type), extra_search_path_(extra_search_path),
1535 just_symbols_(just_symbols), options_(options), arg_serial_(0)
1538 // You can also pass in a General_options instance instead of a
1539 // Position_dependent_options. In that case, we extract the
1540 // position-independent vars from the General_options and only store
1542 Input_file_argument(const char* name, Input_file_type type,
1543 const char* extra_search_path,
1545 const General_options& options)
1546 : name_(name), type_(type), extra_search_path_(extra_search_path),
1547 just_symbols_(just_symbols), options_(options), arg_serial_(0)
1552 { return this->name_.c_str(); }
1554 const Position_dependent_options&
1556 { return this->options_; }
1560 { return type_ == INPUT_FILE_TYPE_LIBRARY; }
1563 is_searched_file() const
1564 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
1567 extra_search_path() const
1569 return (this->extra_search_path_.empty()
1571 : this->extra_search_path_.c_str());
1574 // Return whether we should only read symbols from this file.
1576 just_symbols() const
1577 { return this->just_symbols_; }
1579 // Return whether this file may require a search using the -L
1582 may_need_search() const
1584 return (this->is_lib()
1585 || this->is_searched_file()
1586 || !this->extra_search_path_.empty());
1589 // Set the serial number for this argument.
1591 set_arg_serial(unsigned int arg_serial)
1592 { this->arg_serial_ = arg_serial; }
1594 // Get the serial number.
1597 { return this->arg_serial_; }
1600 // We use std::string, not const char*, here for convenience when
1601 // using script files, so that we do not have to preserve the string
1604 Input_file_type type_;
1605 std::string extra_search_path_;
1607 Position_dependent_options options_;
1608 // A unique index for this file argument in the argument list.
1609 unsigned int arg_serial_;
1612 // A file or library, or a group, from the command line.
1614 class Input_argument
1617 // Create a file or library argument.
1618 explicit Input_argument(Input_file_argument file)
1619 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL)
1622 // Create a group argument.
1623 explicit Input_argument(Input_file_group* group)
1624 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL)
1627 // Create a lib argument.
1628 explicit Input_argument(Input_file_lib* lib)
1629 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL)
1632 // Return whether this is a file.
1635 { return this->is_file_; }
1637 // Return whether this is a group.
1640 { return !this->is_file_ && this->lib_ == NULL; }
1642 // Return whether this is a lib.
1645 { return this->lib_ != NULL; }
1647 // Return the information about the file.
1648 const Input_file_argument&
1651 gold_assert(this->is_file_);
1655 // Return the information about the group.
1656 const Input_file_group*
1659 gold_assert(!this->is_file_);
1660 return this->group_;
1666 gold_assert(!this->is_file_);
1667 return this->group_;
1670 // Return the information about the lib.
1671 const Input_file_lib*
1674 gold_assert(!this->is_file_);
1675 gold_assert(this->lib_);
1682 gold_assert(!this->is_file_);
1683 gold_assert(this->lib_);
1687 // If a script generated this argument, store a pointer to the script info.
1688 // Currently used only for recording incremental link information.
1690 set_script_info(Script_info* info)
1691 { this->script_info_ = info; }
1695 { return this->script_info_; }
1699 Input_file_argument file_;
1700 Input_file_group* group_;
1701 Input_file_lib* lib_;
1702 Script_info* script_info_;
1705 typedef std::vector<Input_argument> Input_argument_list;
1707 // A group from the command line. This is a set of arguments within
1708 // --start-group ... --end-group.
1710 class Input_file_group
1713 typedef Input_argument_list::const_iterator const_iterator;
1719 // Add a file to the end of the group.
1721 add_file(const Input_file_argument& arg)
1723 this->files_.push_back(Input_argument(arg));
1724 return this->files_.back();
1727 // Iterators to iterate over the group contents.
1731 { return this->files_.begin(); }
1735 { return this->files_.end(); }
1738 Input_argument_list files_;
1741 // A lib from the command line. This is a set of arguments within
1742 // --start-lib ... --end-lib.
1744 class Input_file_lib
1747 typedef Input_argument_list::const_iterator const_iterator;
1749 Input_file_lib(const Position_dependent_options& options)
1750 : files_(), options_(options)
1753 // Add a file to the end of the lib.
1755 add_file(const Input_file_argument& arg)
1757 this->files_.push_back(Input_argument(arg));
1758 return this->files_.back();
1761 const Position_dependent_options&
1763 { return this->options_; }
1765 // Iterators to iterate over the lib contents.
1769 { return this->files_.begin(); }
1773 { return this->files_.end(); }
1777 { return this->files_.size(); }
1780 Input_argument_list files_;
1781 Position_dependent_options options_;
1784 // A list of files from the command line or a script.
1786 class Input_arguments
1789 typedef Input_argument_list::const_iterator const_iterator;
1792 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0)
1797 add_file(Input_file_argument& arg);
1799 // Start a group (the --start-group option).
1803 // End a group (the --end-group option).
1807 // Start a lib (the --start-lib option).
1809 start_lib(const Position_dependent_options&);
1811 // End a lib (the --end-lib option).
1815 // Return whether we are currently in a group.
1818 { return this->in_group_; }
1820 // Return whether we are currently in a lib.
1823 { return this->in_lib_; }
1825 // The number of entries in the list.
1828 { return this->input_argument_list_.size(); }
1830 // Iterators to iterate over the list of input files.
1834 { return this->input_argument_list_.begin(); }
1838 { return this->input_argument_list_.end(); }
1840 // Return whether the list is empty.
1843 { return this->input_argument_list_.empty(); }
1845 // Return the number of input files. This may be larger than
1846 // input_argument_list_.size(), because of files that are part
1847 // of groups or libs.
1849 number_of_input_files() const
1850 { return this->file_count_; }
1853 Input_argument_list input_argument_list_;
1856 unsigned int file_count_;
1860 // All the information read from the command line. These are held in
1861 // three separate structs: one to hold the options (--foo), one to
1862 // hold the filenames listed on the commandline, and one to hold
1863 // linker script information. This third is not a subset of the other
1864 // two because linker scripts can be specified either as options (via
1865 // -T) or as a file.
1870 typedef Input_arguments::const_iterator const_iterator;
1874 // Process the command line options. This will exit with an
1875 // appropriate error message if an unrecognized option is seen.
1877 process(int argc, const char** argv);
1879 // Process one command-line option. This takes the index of argv to
1880 // process, and returns the index for the next option. no_more_options
1881 // is set to true if argv[i] is "--".
1883 process_one_option(int argc, const char** argv, int i,
1884 bool* no_more_options);
1886 // Get the general options.
1887 const General_options&
1889 { return this->options_; }
1891 // Get the position dependent options.
1892 const Position_dependent_options&
1893 position_dependent_options() const
1894 { return this->position_options_; }
1896 // Get the linker-script options.
1899 { return this->script_options_; }
1901 // Finalize the version-script options and return them.
1902 const Version_script_info&
1905 // Get the input files.
1908 { return this->inputs_; }
1910 // The number of input files.
1912 number_of_input_files() const
1913 { return this->inputs_.number_of_input_files(); }
1915 // Iterators to iterate over the list of input files.
1919 { return this->inputs_.begin(); }
1923 { return this->inputs_.end(); }
1926 Command_line(const Command_line&);
1927 Command_line& operator=(const Command_line&);
1929 // This is a dummy class to provide a constructor that runs before
1930 // the constructor for the General_options. The Pre_options constructor
1931 // is used as a hook to set the flag enabling the options to register
1933 struct Pre_options {
1937 // This must come before options_!
1938 Pre_options pre_options_;
1939 General_options options_;
1940 Position_dependent_options position_options_;
1941 Script_options script_options_;
1942 Input_arguments inputs_;
1945 } // End namespace gold.
1947 #endif // !defined(GOLD_OPTIONS_H)