1 // options.h -- handle command line options for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
23 // General_options (from Command_line::options())
24 // All the options (a.k.a. command-line flags)
25 // Input_argument (from Command_line::inputs())
26 // The list of input files, including -l options.
28 // Everything we get from the command line -- the General_options
29 // plus the Input_arguments.
31 // There are also some smaller classes, such as
32 // Position_dependent_options which hold a subset of General_options
33 // that change as options are parsed (as opposed to the usual behavior
34 // of the last instance of that option specified on the commandline wins).
36 #ifndef GOLD_OPTIONS_H
37 #define GOLD_OPTIONS_H
52 class General_options
;
53 class Search_directory
;
54 class Input_file_group
;
55 class Position_dependent_options
;
59 // Incremental build action for a specific file, as selected by the user.
61 enum Incremental_disposition
63 // Determine the status from the timestamp (default).
65 // Assume the file changed from the previous build.
67 // Assume the file didn't change from the previous build.
71 // The nested namespace is to contain all the global variables and
72 // structs that need to be defined in the .h file, but do not need to
73 // be used outside this class.
76 typedef std::vector
<Search_directory
> Dir_list
;
77 typedef Unordered_set
<std::string
> String_set
;
79 // These routines convert from a string option to various types.
80 // Each gives a fatal error if it cannot parse the argument.
83 parse_bool(const char* option_name
, const char* arg
, bool* retval
);
86 parse_int(const char* option_name
, const char* arg
, int* retval
);
89 parse_uint(const char* option_name
, const char* arg
, int* retval
);
92 parse_uint64(const char* option_name
, const char* arg
, uint64_t* retval
);
95 parse_double(const char* option_name
, const char* arg
, double* retval
);
98 parse_string(const char* option_name
, const char* arg
, const char** retval
);
101 parse_optional_string(const char* option_name
, const char* arg
,
102 const char** retval
);
105 parse_dirlist(const char* option_name
, const char* arg
, Dir_list
* retval
);
108 parse_set(const char* option_name
, const char* arg
, String_set
* retval
);
111 parse_choices(const char* option_name
, const char* arg
, const char** retval
,
112 const char* choices
[], int num_choices
);
116 // Most options have both a shortname (one letter) and a longname.
117 // This enum controls how many dashes are expected for longname access
118 // -- shortnames always use one dash. Most longnames will accept
119 // either one dash or two; the only difference between ONE_DASH and
120 // TWO_DASHES is how we print the option in --help. However, some
121 // longnames require two dashes, and some require only one. The
122 // special value DASH_Z means that the option is preceded by "-z".
125 ONE_DASH
, TWO_DASHES
, EXACTLY_ONE_DASH
, EXACTLY_TWO_DASHES
, DASH_Z
128 // LONGNAME is the long-name of the option with dashes converted to
129 // underscores, or else the short-name if the option has no long-name.
130 // It is never the empty string.
131 // DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
132 // SHORTNAME is the short-name of the option, as a char, or '\0' if the
133 // option has no short-name. If the option has no long-name, you
134 // should specify the short-name in *both* VARNAME and here.
135 // DEFAULT_VALUE is the value of the option if not specified on the
136 // commandline, as a string.
137 // HELPSTRING is the descriptive text used with the option via --help
138 // HELPARG is how you define the argument to the option.
139 // --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
140 // HELPARG should be NULL iff the option is a bool and takes no arg.
141 // OPTIONAL_ARG is true if this option takes an optional argument. An
142 // optional argument must be specifid as --OPTION=VALUE, not
144 // READER provides parse_to_value, which is a function that will convert
145 // a char* argument into the proper type and store it in some variable.
146 // A One_option struct initializes itself with the global list of options
147 // at constructor time, so be careful making one of these.
150 std::string longname
;
153 const char* default_value
;
154 const char* helpstring
;
159 One_option(const char* ln
, Dashes d
, char sn
, const char* dv
,
160 const char* hs
, const char* ha
, bool oa
, Struct_var
* r
)
161 : longname(ln
), dashes(d
), shortname(sn
), default_value(dv
? dv
: ""),
162 helpstring(hs
), helparg(ha
), optional_arg(oa
), reader(r
)
164 // In longname, we convert all underscores to dashes, since GNU
165 // style uses dashes in option names. longname is likely to have
166 // underscores in it because it's also used to declare a C++
168 const char* pos
= strchr(this->longname
.c_str(), '_');
169 for (; pos
; pos
= strchr(pos
, '_'))
170 this->longname
[pos
- this->longname
.c_str()] = '-';
172 // We only register ourselves if our helpstring is not NULL. This
173 // is to support the "no-VAR" boolean variables, which we
174 // conditionally turn on by defining "no-VAR" help text.
175 if (this->helpstring
)
176 this->register_option();
179 // This option takes an argument iff helparg is not NULL.
181 takes_argument() const
182 { return this->helparg
!= NULL
; }
184 // Whether the argument is optional.
186 takes_optional_argument() const
187 { return this->optional_arg
; }
189 // Register this option with the global list of options.
193 // Print this option to stdout (used with --help).
198 // All options have a Struct_##varname that inherits from this and
199 // actually implements parse_to_value for that option.
202 // OPTION: the name of the option as specified on the commandline,
203 // including leading dashes, and any text following the option:
204 // "-O", "--defsym=mysym=0x1000", etc.
205 // ARG: the arg associated with this option, or NULL if the option
206 // takes no argument: "2", "mysym=0x1000", etc.
207 // CMDLINE: the global Command_line object. Used by DEFINE_special.
208 // OPTIONS: the global General_options object. Used by DEFINE_special.
210 parse_to_value(const char* option
, const char* arg
,
211 Command_line
* cmdline
, General_options
* options
) = 0;
213 ~Struct_var() // To make gcc happy.
217 // This is for "special" options that aren't of any predefined type.
218 struct Struct_special
: public Struct_var
220 // If you change this, change the parse-fn in DEFINE_special as well.
221 typedef void (General_options::*Parse_function
)(const char*, const char*,
223 Struct_special(const char* varname
, Dashes dashes
, char shortname
,
224 Parse_function parse_function
,
225 const char* helpstring
, const char* helparg
)
226 : option(varname
, dashes
, shortname
, "", helpstring
, helparg
, false, this),
227 parse(parse_function
)
230 void parse_to_value(const char* option
, const char* arg
,
231 Command_line
* cmdline
, General_options
* options
)
232 { (options
->*(this->parse
))(option
, arg
, cmdline
); }
235 Parse_function parse
;
238 } // End namespace options.
241 // These are helper macros use by DEFINE_uint64/etc below.
242 // This macro is used inside the General_options_ class, so defines
243 // var() and set_var() as General_options methods. Arguments as are
244 // for the constructor for One_option. param_type__ is the same as
245 // type__ for built-in types, and "const type__ &" otherwise.
246 #define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
247 default_value_as_string__, helpstring__, helparg__, \
248 optional_arg__, type__, param_type__, parse_fn__) \
252 { return this->varname__##_.value; } \
255 user_set_##varname__() const \
256 { return this->varname__##_.user_set_via_option; } \
259 set_user_set_##varname__() \
260 { this->varname__##_.user_set_via_option = true; } \
263 struct Struct_##varname__ : public options::Struct_var \
265 Struct_##varname__() \
266 : option(#varname__, dashes__, shortname__, default_value_as_string__, \
267 helpstring__, helparg__, optional_arg__, this), \
268 user_set_via_option(false), value(default_value__) \
272 parse_to_value(const char* option_name, const char* arg, \
273 Command_line*, General_options*) \
275 parse_fn__(option_name, arg, &this->value); \
276 this->user_set_via_option = true; \
279 options::One_option option; \
280 bool user_set_via_option; \
283 Struct_##varname__ varname__##_; \
285 set_##varname__(param_type__ value) \
286 { this->varname__##_.value = value; }
288 // These macros allow for easy addition of a new commandline option.
290 // If no_helpstring__ is not NULL, then in addition to creating
291 // VARNAME, we also create an option called no-VARNAME (or, for a -z
292 // option, noVARNAME).
293 #define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
294 helpstring__, no_helpstring__) \
295 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
296 default_value__ ? "true" : "false", helpstring__, NULL, \
297 false, bool, bool, options::parse_bool) \
298 struct Struct_no_##varname__ : public options::Struct_var \
300 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
302 : "no-" #varname__), \
304 default_value__ ? "false" : "true", \
305 no_helpstring__, NULL, false, this) \
309 parse_to_value(const char*, const char*, \
310 Command_line*, General_options* options) \
311 { options->set_##varname__(false); } \
313 options::One_option option; \
315 Struct_no_##varname__ no_##varname__##_initializer_
317 #define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
318 helpstring__, no_helpstring__) \
319 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
320 default_value__ ? "true" : "false", helpstring__, NULL, \
321 false, bool, bool, options::parse_bool) \
322 struct Struct_disable_##varname__ : public options::Struct_var \
324 Struct_disable_##varname__() : option("disable-" #varname__, \
326 default_value__ ? "false" : "true", \
327 no_helpstring__, NULL, false, this) \
331 parse_to_value(const char*, const char*, \
332 Command_line*, General_options* options) \
333 { options->set_enable_##varname__(false); } \
335 options::One_option option; \
337 Struct_disable_##varname__ disable_##varname__##_initializer_
339 #define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
340 helpstring__, helparg__) \
341 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
342 #default_value__, helpstring__, helparg__, false, \
343 int, int, options::parse_int)
345 #define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
346 helpstring__, helparg__) \
347 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
348 #default_value__, helpstring__, helparg__, false, \
349 int, int, options::parse_uint)
351 #define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
352 helpstring__, helparg__) \
353 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
354 #default_value__, helpstring__, helparg__, false, \
355 uint64_t, uint64_t, options::parse_uint64)
357 #define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
358 helpstring__, helparg__) \
359 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
360 #default_value__, helpstring__, helparg__, false, \
361 double, double, options::parse_double)
363 #define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
364 helpstring__, helparg__) \
365 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
366 default_value__, helpstring__, helparg__, false, \
367 const char*, const char*, options::parse_string)
369 // This is like DEFINE_string, but we convert each occurrence to a
370 // Search_directory and store it in a vector. Thus we also have the
371 // add_to_VARNAME() method, to append to the vector.
372 #define DEFINE_dirlist(varname__, dashes__, shortname__, \
373 helpstring__, helparg__) \
374 DEFINE_var(varname__, dashes__, shortname__, , \
375 "", helpstring__, helparg__, false, options::Dir_list, \
376 const options::Dir_list&, options::parse_dirlist) \
378 add_to_##varname__(const char* new_value) \
379 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
381 add_search_directory_to_##varname__(const Search_directory& dir) \
382 { this->varname__##_.value.push_back(dir); }
384 // This is like DEFINE_string, but we store a set of strings.
385 #define DEFINE_set(varname__, dashes__, shortname__, \
386 helpstring__, helparg__) \
387 DEFINE_var(varname__, dashes__, shortname__, , \
388 "", helpstring__, helparg__, false, options::String_set, \
389 const options::String_set&, options::parse_set) \
392 any_##varname__() const \
393 { return !this->varname__##_.value.empty(); } \
396 is_##varname__(const char* symbol) const \
398 return (!this->varname__##_.value.empty() \
399 && (this->varname__##_.value.find(std::string(symbol)) \
400 != this->varname__##_.value.end())); \
403 options::String_set::const_iterator \
404 varname__##_begin() const \
405 { return this->varname__##_.value.begin(); } \
407 options::String_set::const_iterator \
408 varname__##_end() const \
409 { return this->varname__##_.value.end(); }
411 // When you have a list of possible values (expressed as string)
412 // After helparg__ should come an initializer list, like
413 // {"foo", "bar", "baz"}
414 #define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
415 helpstring__, helparg__, ...) \
416 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
417 default_value__, helpstring__, helparg__, false, \
418 const char*, const char*, parse_choices_##varname__) \
420 static void parse_choices_##varname__(const char* option_name, \
422 const char** retval) { \
423 const char* choices[] = __VA_ARGS__; \
424 options::parse_choices(option_name, arg, retval, \
425 choices, sizeof(choices) / sizeof(*choices)); \
428 // This is like DEFINE_bool, but VARNAME is the name of a different
429 // option. This option becomes an alias for that one. INVERT is true
430 // if this option is an inversion of the other one.
431 #define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
432 helpstring__, no_helpstring__, invert__) \
434 struct Struct_##option__ : public options::Struct_var \
436 Struct_##option__() \
437 : option(#option__, dashes__, shortname__, "", helpstring__, \
442 parse_to_value(const char*, const char*, \
443 Command_line*, General_options* options) \
445 options->set_##varname__(!invert__); \
446 options->set_user_set_##varname__(); \
449 options::One_option option; \
451 Struct_##option__ option__##_; \
453 struct Struct_no_##option__ : public options::Struct_var \
455 Struct_no_##option__() \
456 : option((dashes__ == options::DASH_Z \
458 : "no-" #option__), \
459 dashes__, '\0', "", no_helpstring__, \
464 parse_to_value(const char*, const char*, \
465 Command_line*, General_options* options) \
467 options->set_##varname__(invert__); \
468 options->set_user_set_##varname__(); \
471 options::One_option option; \
473 Struct_no_##option__ no_##option__##_initializer_
475 // This is used for non-standard flags. It defines no functions; it
476 // just calls General_options::parse_VARNAME whenever the flag is
477 // seen. We declare parse_VARNAME as a static member of
478 // General_options; you are responsible for defining it there.
479 // helparg__ should be NULL iff this special-option is a boolean.
480 #define DEFINE_special(varname__, dashes__, shortname__, \
481 helpstring__, helparg__) \
483 void parse_##varname__(const char* option, const char* arg, \
484 Command_line* inputs); \
485 struct Struct_##varname__ : public options::Struct_special \
487 Struct_##varname__() \
488 : options::Struct_special(#varname__, dashes__, shortname__, \
489 &General_options::parse_##varname__, \
490 helpstring__, helparg__) \
493 Struct_##varname__ varname__##_initializer_
495 // An option that takes an optional string argument. If the option is
496 // used with no argument, the value will be the default, and
497 // user_set_via_option will be true.
498 #define DEFINE_optional_string(varname__, dashes__, shortname__, \
500 helpstring__, helparg__) \
501 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
502 default_value__, helpstring__, helparg__, true, \
503 const char*, const char*, options::parse_optional_string)
505 // A directory to search. For each directory we record whether it is
506 // in the sysroot. We need to know this so that, if a linker script
507 // is found within the sysroot, we will apply the sysroot to any files
508 // named by that script.
510 class Search_directory
513 // We need a default constructor because we put this in a
516 : name_(NULL
), put_in_sysroot_(false), is_in_sysroot_(false)
519 // This is the usual constructor.
520 Search_directory(const char* name
, bool put_in_sysroot
)
521 : name_(name
), put_in_sysroot_(put_in_sysroot
), is_in_sysroot_(false)
523 if (this->name_
.empty())
527 // This is called if we have a sysroot. The sysroot is prefixed to
528 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
529 // set to true for any enries which are in the sysroot (this will
530 // naturally include any entries for which put_in_sysroot_ is true).
531 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
532 // passing SYSROOT to lrealpath.
534 add_sysroot(const char* sysroot
, const char* canonical_sysroot
);
536 // Get the directory name.
539 { return this->name_
; }
541 // Return whether this directory is in the sysroot.
543 is_in_sysroot() const
544 { return this->is_in_sysroot_
; }
546 // Return whether this is considered a system directory.
548 is_system_directory() const
549 { return this->put_in_sysroot_
|| this->is_in_sysroot_
; }
552 // The directory name.
554 // True if the sysroot should be added as a prefix for this
555 // directory (if there is a sysroot). This is true for system
556 // directories that we search by default.
557 bool put_in_sysroot_
;
558 // True if this directory is in the sysroot (if there is a sysroot).
559 // This is true if there is a sysroot and either 1) put_in_sysroot_
560 // is true, or 2) the directory happens to be in the sysroot based
561 // on a pathname comparison.
565 class General_options
568 // NOTE: For every option that you add here, also consider if you
569 // should add it to Position_dependent_options.
570 DEFINE_special(help
, options::TWO_DASHES
, '\0',
571 N_("Report usage information"), NULL
);
572 DEFINE_special(version
, options::TWO_DASHES
, 'v',
573 N_("Report version information"), NULL
);
574 DEFINE_special(V
, options::EXACTLY_ONE_DASH
, '\0',
575 N_("Report version and target information"), NULL
);
577 // These options are sorted approximately so that for each letter in
578 // the alphabet, we show the option whose shortname is that letter
579 // (if any) and then every longname that starts with that letter (in
580 // alphabetical order). For both, lowercase sorts before uppercase.
581 // The -z options come last.
583 DEFINE_bool(allow_shlib_undefined
, options::TWO_DASHES
, '\0', false,
584 N_("Allow unresolved references in shared libraries"),
585 N_("Do not allow unresolved references in shared libraries"));
587 DEFINE_bool(as_needed
, options::TWO_DASHES
, '\0', false,
588 N_("Only set DT_NEEDED for dynamic libs if used"),
589 N_("Always DT_NEEDED for dynamic libs"));
591 // This should really be an "enum", but it's too easy for folks to
592 // forget to update the list as they add new targets. So we just
593 // accept any string. We'll fail later (when the string is parsed),
594 // if the target isn't actually supported.
595 DEFINE_string(format
, options::TWO_DASHES
, 'b', "elf",
596 N_("Set input format"), ("[elf,binary]"));
598 DEFINE_bool(Bdynamic
, options::ONE_DASH
, '\0', true,
599 N_("-l searches for shared libraries"), NULL
);
600 DEFINE_bool_alias(Bstatic
, Bdynamic
, options::ONE_DASH
, '\0',
601 N_("-l does not search for shared libraries"), NULL
,
604 DEFINE_bool(Bsymbolic
, options::ONE_DASH
, '\0', false,
605 N_("Bind defined symbols locally"), NULL
);
607 DEFINE_bool(Bsymbolic_functions
, options::ONE_DASH
, '\0', false,
608 N_("Bind defined function symbols locally"), NULL
);
610 DEFINE_optional_string(build_id
, options::TWO_DASHES
, '\0', "sha1",
611 N_("Generate build ID note"),
614 DEFINE_bool(check_sections
, options::TWO_DASHES
, '\0', true,
615 N_("Check segment addresses for overlaps (default)"),
616 N_("Do not check segment addresses for overlaps"));
619 DEFINE_enum(compress_debug_sections
, options::TWO_DASHES
, '\0', "none",
620 N_("Compress .debug_* sections in the output file"),
624 DEFINE_enum(compress_debug_sections
, options::TWO_DASHES
, '\0', "none",
625 N_("Compress .debug_* sections in the output file"),
630 DEFINE_bool(define_common
, options::TWO_DASHES
, 'd', false,
631 N_("Define common symbols"),
632 N_("Do not define common symbols"));
633 DEFINE_bool(dc
, options::ONE_DASH
, '\0', false,
634 N_("Alias for -d"), NULL
);
635 DEFINE_bool(dp
, options::ONE_DASH
, '\0', false,
636 N_("Alias for -d"), NULL
);
638 DEFINE_string(debug
, options::TWO_DASHES
, '\0', "",
639 N_("Turn on debugging"),
640 N_("[all,files,script,task][,...]"));
642 DEFINE_special(defsym
, options::TWO_DASHES
, '\0',
643 N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
645 DEFINE_optional_string(demangle
, options::TWO_DASHES
, '\0', NULL
,
646 N_("Demangle C++ symbols in log messages"),
649 DEFINE_bool(no_demangle
, options::TWO_DASHES
, '\0', false,
650 N_("Do not demangle C++ symbols in log messages"),
653 DEFINE_bool(detect_odr_violations
, options::TWO_DASHES
, '\0', false,
654 N_("Try to detect violations of the One Definition Rule"),
657 DEFINE_bool(discard_all
, options::TWO_DASHES
, 'x', false,
658 N_("Delete all local symbols"), NULL
);
659 DEFINE_bool(discard_locals
, options::TWO_DASHES
, 'X', false,
660 N_("Delete all temporary local symbols"), NULL
);
662 DEFINE_bool(dynamic_list_data
, options::TWO_DASHES
, '\0', false,
663 N_("Add data symbols to dynamic symbols"), NULL
);
665 DEFINE_bool(dynamic_list_cpp_new
, options::TWO_DASHES
, '\0', false,
666 N_("Add C++ operator new/delete to dynamic symbols"), NULL
);
668 DEFINE_bool(dynamic_list_cpp_typeinfo
, options::TWO_DASHES
, '\0', false,
669 N_("Add C++ typeinfo to dynamic symbols"), NULL
);
671 DEFINE_special(dynamic_list
, options::TWO_DASHES
, '\0',
672 N_("Read a list of dynamic symbols"), N_("FILE"));
674 DEFINE_string(entry
, options::TWO_DASHES
, 'e', NULL
,
675 N_("Set program start address"), N_("ADDRESS"));
677 DEFINE_special(exclude_libs
, options::TWO_DASHES
, '\0',
678 N_("Exclude libraries from automatic export"),
679 N_(("lib,lib ...")));
681 DEFINE_bool(export_dynamic
, options::TWO_DASHES
, 'E', false,
682 N_("Export all dynamic symbols"),
683 N_("Do not export all dynamic symbols (default)"));
685 DEFINE_bool(eh_frame_hdr
, options::TWO_DASHES
, '\0', false,
686 N_("Create exception frame header"), NULL
);
688 DEFINE_bool(fatal_warnings
, options::TWO_DASHES
, '\0', false,
689 N_("Treat warnings as errors"),
690 N_("Do not treat warnings as errors"));
692 DEFINE_string(fini
, options::ONE_DASH
, '\0', "_fini",
693 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
695 DEFINE_string(soname
, options::ONE_DASH
, 'h', NULL
,
696 N_("Set shared library name"), N_("FILENAME"));
698 DEFINE_double(hash_bucket_empty_fraction
, options::TWO_DASHES
, '\0', 0.0,
699 N_("Min fraction of empty buckets in dynamic hash"),
702 DEFINE_enum(hash_style
, options::TWO_DASHES
, '\0', "sysv",
703 N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
704 {"sysv", "gnu", "both"});
706 DEFINE_string(dynamic_linker
, options::TWO_DASHES
, 'I', NULL
,
707 N_("Set dynamic linker path"), N_("PROGRAM"));
709 DEFINE_bool(incremental
, options::TWO_DASHES
, '\0', false,
710 N_("Work in progress; do not use"),
711 N_("Do a full build"));
713 DEFINE_special(incremental_changed
, options::TWO_DASHES
, '\0',
714 N_("Assume files changed"), NULL
);
716 DEFINE_special(incremental_unchanged
, options::TWO_DASHES
, '\0',
717 N_("Assume files didn't change"), NULL
);
719 DEFINE_special(incremental_unknown
, options::TWO_DASHES
, '\0',
720 N_("Use timestamps to check files (default)"), NULL
);
722 DEFINE_string(init
, options::ONE_DASH
, '\0', "_init",
723 N_("Call SYMBOL at load-time"), N_("SYMBOL"));
725 DEFINE_special(just_symbols
, options::TWO_DASHES
, '\0',
726 N_("Read only symbol values from FILE"), N_("FILE"));
728 DEFINE_bool(keep_files_mapped
, options::TWO_DASHES
, '\0',
730 N_("Map whole files to memory (default on 64-bit hosts)"),
731 N_("Map relevant file parts to memory (default on 32-bit "
734 DEFINE_special(library
, options::TWO_DASHES
, 'l',
735 N_("Search for library LIBNAME"), N_("LIBNAME"));
737 DEFINE_dirlist(library_path
, options::TWO_DASHES
, 'L',
738 N_("Add directory to search path"), N_("DIR"));
740 DEFINE_string(m
, options::EXACTLY_ONE_DASH
, 'm', "",
741 N_("Ignored for compatibility"), N_("EMULATION"));
743 DEFINE_bool(print_map
, options::TWO_DASHES
, 'M', false,
744 N_("Write map file on standard output"), NULL
);
745 DEFINE_string(Map
, options::ONE_DASH
, '\0', NULL
, N_("Write map file"),
748 DEFINE_bool(nmagic
, options::TWO_DASHES
, 'n', false,
749 N_("Do not page align data"), NULL
);
750 DEFINE_bool(omagic
, options::EXACTLY_TWO_DASHES
, 'N', false,
751 N_("Do not page align data, do not make text readonly"),
752 N_("Page align data, make text readonly"));
754 DEFINE_enable(new_dtags
, options::EXACTLY_TWO_DASHES
, '\0', false,
755 N_("Enable use of DT_RUNPATH and DT_FLAGS"),
756 N_("Disable use of DT_RUNPATH and DT_FLAGS"));
758 DEFINE_bool(noinhibit_exec
, options::TWO_DASHES
, '\0', false,
759 N_("Create an output file even if errors occur"), NULL
);
761 DEFINE_bool_alias(no_undefined
, defs
, options::TWO_DASHES
, '\0',
762 N_("Report undefined symbols (even with --shared)"),
765 DEFINE_string(output
, options::TWO_DASHES
, 'o', "a.out",
766 N_("Set output file name"), N_("FILE"));
768 DEFINE_uint(optimize
, options::EXACTLY_ONE_DASH
, 'O', 0,
769 N_("Optimize output file size"), N_("LEVEL"));
771 DEFINE_string(oformat
, options::EXACTLY_TWO_DASHES
, '\0', "elf",
772 N_("Set output format"), N_("[binary]"));
774 DEFINE_bool(pie
, options::ONE_DASH
, '\0', false,
775 N_("Create a position independent executable"), NULL
);
776 DEFINE_bool_alias(pic_executable
, pie
, options::TWO_DASHES
, '\0',
777 N_("Create a position independent executable"), NULL
,
780 #ifdef ENABLE_PLUGINS
781 DEFINE_special(plugin
, options::TWO_DASHES
, '\0',
782 N_("Load a plugin library"), N_("PLUGIN"));
783 DEFINE_special(plugin_opt
, options::TWO_DASHES
, '\0',
784 N_("Pass an option to the plugin"), N_("OPTION"));
787 DEFINE_bool(preread_archive_symbols
, options::TWO_DASHES
, '\0', false,
788 N_("Preread archive symbols when multi-threaded"), NULL
);
790 DEFINE_string(print_symbol_counts
, options::TWO_DASHES
, '\0', NULL
,
791 N_("Print symbols defined and used for each input"),
794 DEFINE_bool(Qy
, options::EXACTLY_ONE_DASH
, '\0', false,
795 N_("Ignored for SVR4 compatibility"), NULL
);
797 DEFINE_bool(emit_relocs
, options::TWO_DASHES
, 'q', false,
798 N_("Generate relocations in output"), NULL
);
800 DEFINE_bool(relocatable
, options::EXACTLY_ONE_DASH
, 'r', false,
801 N_("Generate relocatable output"), NULL
);
803 DEFINE_bool(relax
, options::TWO_DASHES
, '\0', false,
804 N_("Relax branches on certain targets"), NULL
);
806 DEFINE_string(retain_symbols_file
, options::EXACTLY_ONE_DASH
, '\0', NULL
,
807 N_("keep only symbols listed in this file"), N_("[file]"));
809 // -R really means -rpath, but can mean --just-symbols for
810 // compatibility with GNU ld. -rpath is always -rpath, so we list
812 DEFINE_special(R
, options::EXACTLY_ONE_DASH
, 'R',
813 N_("Add DIR to runtime search path"), N_("DIR"));
815 DEFINE_dirlist(rpath
, options::ONE_DASH
, '\0',
816 N_("Add DIR to runtime search path"), N_("DIR"));
818 DEFINE_dirlist(rpath_link
, options::TWO_DASHES
, '\0',
819 N_("Add DIR to link time shared library search path"),
822 DEFINE_optional_string(sort_common
, options::TWO_DASHES
, '\0', NULL
,
823 N_("Sort common symbols by alignment"),
824 N_("[={ascending,descending}]"));
826 DEFINE_bool(strip_all
, options::TWO_DASHES
, 's', false,
827 N_("Strip all symbols"), NULL
);
828 DEFINE_bool(strip_debug
, options::TWO_DASHES
, 'S', false,
829 N_("Strip debugging information"), NULL
);
830 DEFINE_bool(strip_debug_non_line
, options::TWO_DASHES
, '\0', false,
831 N_("Emit only debug line number information"), NULL
);
832 DEFINE_bool(strip_debug_gdb
, options::TWO_DASHES
, '\0', false,
833 N_("Strip debug symbols that are unused by gdb "
834 "(at least versions <= 6.7)"), NULL
);
835 DEFINE_bool(strip_lto_sections
, options::TWO_DASHES
, '\0', true,
836 N_("Strip LTO intermediate code sections"), NULL
);
838 DEFINE_int(stub_group_size
, options::TWO_DASHES
, '\0', 1,
839 N_("(ARM only) The maximum distance from instructions in a group "
840 "of sections to their stubs. Negative values mean stubs "
841 "are always after the group. 1 means using default size.\n"),
844 DEFINE_bool(no_keep_memory
, options::TWO_DASHES
, '\0', false,
845 N_("Use less memory and more disk I/O "
846 "(included only for compatibility with GNU ld)"), NULL
);
848 DEFINE_bool(shared
, options::ONE_DASH
, '\0', false,
849 N_("Generate shared library"), NULL
);
851 DEFINE_bool(Bshareable
, options::ONE_DASH
, '\0', false,
852 N_("Generate shared library"), NULL
);
854 DEFINE_uint(split_stack_adjust_size
, options::TWO_DASHES
, '\0', 0x4000,
855 N_("Stack size when -fsplit-stack function calls non-split"),
858 // This is not actually special in any way, but I need to give it
859 // a non-standard accessor-function name because 'static' is a keyword.
860 DEFINE_special(static, options::ONE_DASH
, '\0',
861 N_("Do not link against shared libraries"), NULL
);
863 DEFINE_enum(icf
, options::TWO_DASHES
, '\0', "none",
864 N_("Identical Code Folding. "
865 "\'--icf=safe\' folds only ctors and dtors."),
867 {"none", "all", "safe"});
869 DEFINE_uint(icf_iterations
, options::TWO_DASHES
, '\0', 0,
870 N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
872 DEFINE_bool(print_icf_sections
, options::TWO_DASHES
, '\0', false,
873 N_("List folded identical sections on stderr"),
874 N_("Do not list folded identical sections"));
876 DEFINE_set(keep_unique
, options::TWO_DASHES
, '\0',
877 N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
879 DEFINE_bool(gc_sections
, options::TWO_DASHES
, '\0', false,
880 N_("Remove unused sections"),
881 N_("Don't remove unused sections (default)"));
883 DEFINE_bool(print_gc_sections
, options::TWO_DASHES
, '\0', false,
884 N_("List removed unused sections on stderr"),
885 N_("Do not list removed unused sections"));
887 DEFINE_bool(stats
, options::TWO_DASHES
, '\0', false,
888 N_("Print resource usage statistics"), NULL
);
890 DEFINE_string(sysroot
, options::TWO_DASHES
, '\0', "",
891 N_("Set target system root directory"), N_("DIR"));
893 DEFINE_bool(trace
, options::TWO_DASHES
, 't', false,
894 N_("Print the name of each input file"), NULL
);
896 DEFINE_special(script
, options::TWO_DASHES
, 'T',
897 N_("Read linker script"), N_("FILE"));
899 DEFINE_bool(threads
, options::TWO_DASHES
, '\0', false,
900 N_("Run the linker multi-threaded"),
901 N_("Do not run the linker multi-threaded"));
902 DEFINE_uint(thread_count
, options::TWO_DASHES
, '\0', 0,
903 N_("Number of threads to use"), N_("COUNT"));
904 DEFINE_uint(thread_count_initial
, options::TWO_DASHES
, '\0', 0,
905 N_("Number of threads to use in initial pass"), N_("COUNT"));
906 DEFINE_uint(thread_count_middle
, options::TWO_DASHES
, '\0', 0,
907 N_("Number of threads to use in middle pass"), N_("COUNT"));
908 DEFINE_uint(thread_count_final
, options::TWO_DASHES
, '\0', 0,
909 N_("Number of threads to use in final pass"), N_("COUNT"));
911 DEFINE_uint64(Tbss
, options::ONE_DASH
, '\0', -1U,
912 N_("Set the address of the bss segment"), N_("ADDRESS"));
913 DEFINE_uint64(Tdata
, options::ONE_DASH
, '\0', -1U,
914 N_("Set the address of the data segment"), N_("ADDRESS"));
915 DEFINE_uint64(Ttext
, options::ONE_DASH
, '\0', -1U,
916 N_("Set the address of the text segment"), N_("ADDRESS"));
918 DEFINE_set(undefined
, options::TWO_DASHES
, 'u',
919 N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
921 DEFINE_bool(verbose
, options::TWO_DASHES
, '\0', false,
922 N_("Synonym for --debug=files"), NULL
);
924 DEFINE_special(version_script
, options::TWO_DASHES
, '\0',
925 N_("Read version script"), N_("FILE"));
927 DEFINE_bool(warn_common
, options::TWO_DASHES
, '\0', false,
928 N_("Warn about duplicate common symbols"),
929 N_("Do not warn about duplicate common symbols (default)"));
931 DEFINE_bool(warn_constructors
, options::TWO_DASHES
, '\0', false,
932 N_("Ignored"), N_("Ignored"));
934 DEFINE_bool(warn_search_mismatch
, options::TWO_DASHES
, '\0', true,
935 N_("Warn when skipping an incompatible library"),
936 N_("Don't warn when skipping an incompatible library"));
938 DEFINE_bool(whole_archive
, options::TWO_DASHES
, '\0', false,
939 N_("Include all archive contents"),
940 N_("Include only needed archive contents"));
942 DEFINE_set(wrap
, options::TWO_DASHES
, '\0',
943 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
945 DEFINE_set(trace_symbol
, options::TWO_DASHES
, 'y',
946 N_("Trace references to symbol"), N_("SYMBOL"));
948 DEFINE_string(Y
, options::EXACTLY_ONE_DASH
, 'Y', "",
949 N_("Default search path for Solaris compatibility"),
952 DEFINE_special(start_group
, options::TWO_DASHES
, '(',
953 N_("Start a library search group"), NULL
);
954 DEFINE_special(end_group
, options::TWO_DASHES
, ')',
955 N_("End a library search group"), NULL
);
959 DEFINE_bool(combreloc
, options::DASH_Z
, '\0', true,
960 N_("Sort dynamic relocs"),
961 N_("Do not sort dynamic relocs"));
962 DEFINE_uint64(common_page_size
, options::DASH_Z
, '\0', 0,
963 N_("Set common page size to SIZE"), N_("SIZE"));
964 DEFINE_bool(defs
, options::DASH_Z
, '\0', false,
965 N_("Report undefined symbols (even with --shared)"),
967 DEFINE_bool(execstack
, options::DASH_Z
, '\0', false,
968 N_("Mark output as requiring executable stack"), NULL
);
969 DEFINE_bool(initfirst
, options::DASH_Z
, '\0', false,
970 N_("Mark DSO to be initialized first at runtime"),
972 DEFINE_bool(interpose
, options::DASH_Z
, '\0', false,
973 N_("Mark object to interpose all DSOs but executable"),
975 DEFINE_bool(lazy
, options::DASH_Z
, '\0', false,
976 N_("Mark object for lazy runtime binding (default)"),
978 DEFINE_bool(loadfltr
, options::DASH_Z
, '\0', false,
979 N_("Mark object requiring immediate process"),
981 DEFINE_uint64(max_page_size
, options::DASH_Z
, '\0', 0,
982 N_("Set maximum page size to SIZE"), N_("SIZE"));
983 DEFINE_bool(copyreloc
, options::DASH_Z
, '\0', true,
985 N_("Do not create copy relocs"));
986 DEFINE_bool(nodefaultlib
, options::DASH_Z
, '\0', false,
987 N_("Mark object not to use default search paths"),
989 DEFINE_bool(nodelete
, options::DASH_Z
, '\0', false,
990 N_("Mark DSO non-deletable at runtime"),
992 DEFINE_bool(nodlopen
, options::DASH_Z
, '\0', false,
993 N_("Mark DSO not available to dlopen"),
995 DEFINE_bool(nodump
, options::DASH_Z
, '\0', false,
996 N_("Mark DSO not available to dldump"),
998 DEFINE_bool(noexecstack
, options::DASH_Z
, '\0', false,
999 N_("Mark output as not requiring executable stack"), NULL
);
1000 DEFINE_bool(now
, options::DASH_Z
, '\0', false,
1001 N_("Mark object for immediate function binding"),
1003 DEFINE_bool(origin
, options::DASH_Z
, '\0', false,
1004 N_("Mark DSO to indicate that needs immediate $ORIGIN "
1005 "processing at runtime"), NULL
);
1006 DEFINE_bool(relro
, options::DASH_Z
, '\0', false,
1007 N_("Where possible mark variables read-only after relocation"),
1008 N_("Don't mark variables read-only after relocation"));
1011 typedef options::Dir_list Dir_list
;
1015 // Does post-processing on flags, making sure they all have
1016 // non-conflicting values. Also converts some flags from their
1017 // "standard" types (string, etc), to another type (enum, DirList),
1018 // which can be accessed via a separate method. Dies if it notices
1022 // True if we printed the version information.
1024 printed_version() const
1025 { return this->printed_version_
; }
1027 // The macro defines output() (based on --output), but that's a
1028 // generic name. Provide this alternative name, which is clearer.
1030 output_file_name() const
1031 { return this->output(); }
1033 // This is not defined via a flag, but combines flags to say whether
1034 // the output is position-independent or not.
1036 output_is_position_independent() const
1037 { return this->shared() || this->pie(); }
1039 // Return true if the output is something that can be exec()ed, such
1040 // as a static executable, or a position-dependent or
1041 // position-independent executable, but not a dynamic library or an
1044 output_is_executable() const
1045 { return !this->shared() && !this->relocatable(); }
1047 // This would normally be static(), and defined automatically, but
1048 // since static is a keyword, we need to come up with our own name.
1053 // In addition to getting the input and output formats as a string
1054 // (via format() and oformat()), we also give access as an enum.
1059 // Straight binary format.
1060 OBJECT_FORMAT_BINARY
1063 // Convert a string to an Object_format. Gives an error if the
1064 // string is not recognized.
1065 static Object_format
1066 string_to_object_format(const char* arg
);
1068 // Note: these functions are not very fast.
1069 Object_format
format_enum() const;
1070 Object_format
oformat_enum() const;
1072 // Return whether FILENAME is in a system directory.
1074 is_in_system_directory(const std::string
& name
) const;
1076 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
1078 should_retain_symbol(const char* symbol_name
) const
1080 if (symbols_to_retain_
.empty()) // means flag wasn't specified
1082 return symbols_to_retain_
.find(symbol_name
) != symbols_to_retain_
.end();
1085 // These are the best way to get access to the execstack state,
1086 // not execstack() and noexecstack() which are hard to use properly.
1088 is_execstack_set() const
1089 { return this->execstack_status_
!= EXECSTACK_FROM_INPUT
; }
1092 is_stack_executable() const
1093 { return this->execstack_status_
== EXECSTACK_YES
; }
1097 { return this->icf_status_
!= ICF_NONE
; }
1100 icf_safe_folding() const
1101 { return this->icf_status_
== ICF_SAFE
; }
1103 // The --demangle option takes an optional string, and there is also
1104 // a --no-demangle option. This is the best way to decide whether
1105 // to demangle or not.
1108 { return this->do_demangle_
; }
1110 // Returns TRUE if any plugin libraries have been loaded.
1113 { return this->plugins_
!= NULL
; }
1115 // Return a pointer to the plugin manager.
1118 { return this->plugins_
; }
1120 // True iff SYMBOL was found in the file specified by dynamic-list.
1122 in_dynamic_list(const char* symbol
) const
1123 { return this->dynamic_list_
.version_script_info()->symbol_is_local(symbol
); }
1125 // Finalize the dynamic list.
1127 finalize_dynamic_list()
1128 { this->dynamic_list_
.version_script_info()->finalize(); }
1130 // The disposition given by the --incremental-changed,
1131 // --incremental-unchanged or --incremental-unknown option. The
1132 // value may change as we proceed parsing the command line flags.
1133 Incremental_disposition
1134 incremental_disposition() const
1135 { return this->incremental_disposition_
; }
1137 // Return true if S is the name of a library excluded from automatic
1140 check_excluded_libs (const std::string
&s
) const;
1143 // Don't copy this structure.
1144 General_options(const General_options
&);
1145 General_options
& operator=(const General_options
&);
1147 // Whether to mark the stack as executable.
1150 // Not set on command line.
1151 EXECSTACK_FROM_INPUT
,
1152 // Mark the stack as executable (-z execstack).
1154 // Mark the stack as not executable (-z noexecstack).
1160 // Do not fold any functions (Default or --icf=none).
1162 // All functions are candidates for folding. (--icf=all).
1164 // Only ctors and dtors are candidates for folding. (--icf=safe).
1169 set_icf_status(Icf_status value
)
1170 { this->icf_status_
= value
; }
1173 set_execstack_status(Execstack value
)
1174 { this->execstack_status_
= value
; }
1177 set_do_demangle(bool value
)
1178 { this->do_demangle_
= value
; }
1181 set_static(bool value
)
1182 { static_
= value
; }
1184 // These are called by finalize() to set up the search-path correctly.
1186 add_to_library_path_with_sysroot(const char* arg
)
1187 { this->add_search_directory_to_library_path(Search_directory(arg
, true)); }
1189 // Apply any sysroot to the directory lists.
1193 // Add a plugin and its arguments to the list of plugins.
1195 add_plugin(const char *filename
);
1197 // Add a plugin option.
1199 add_plugin_option(const char* opt
);
1201 // Whether we printed version information.
1202 bool printed_version_
;
1203 // Whether to mark the stack as executable.
1204 Execstack execstack_status_
;
1205 // Whether to do code folding.
1206 Icf_status icf_status_
;
1207 // Whether to do a static link.
1209 // Whether to do demangling.
1211 // List of plugin libraries.
1212 Plugin_manager
* plugins_
;
1213 // The parsed output of --dynamic-list files. For convenience in
1214 // script.cc, we store this as a Script_options object, even though
1215 // we only use a single Version_tree from it.
1216 Script_options dynamic_list_
;
1217 // The disposition given by the --incremental-changed,
1218 // --incremental-unchanged or --incremental-unknown option. The
1219 // value may change as we proceed parsing the command line flags.
1220 Incremental_disposition incremental_disposition_
;
1221 // Whether we have seen one of the options that require incremental
1222 // build (--incremental-changed, --incremental-unchanged or
1223 // --incremental-unknown)
1224 bool implicit_incremental_
;
1225 // Libraries excluded from automatic export, via --exclude-libs.
1226 Unordered_set
<std::string
> excluded_libs_
;
1227 // List of symbol-names to keep, via -retain-symbol-info.
1228 Unordered_set
<std::string
> symbols_to_retain_
;
1231 // The position-dependent options. We use this to store the state of
1232 // the commandline at a particular point in parsing for later
1233 // reference. For instance, if we see "ld --whole-archive foo.a
1234 // --no-whole-archive," we want to store the whole-archive option with
1235 // foo.a, so when the time comes to parse foo.a we know we should do
1236 // it in whole-archive mode. We could store all of General_options,
1237 // but that's big, so we just pick the subset of flags that actually
1238 // change in a position-dependent way.
1240 #define DEFINE_posdep(varname__, type__) \
1244 { return this->varname__##_; } \
1247 set_##varname__(type__ value) \
1248 { this->varname__##_ = value; } \
1252 class Position_dependent_options
1255 Position_dependent_options(const General_options
& options
1256 = Position_dependent_options::default_options_
)
1257 { copy_from_options(options
); }
1259 void copy_from_options(const General_options
& options
)
1261 this->set_as_needed(options
.as_needed());
1262 this->set_Bdynamic(options
.Bdynamic());
1263 this->set_format_enum(options
.format_enum());
1264 this->set_whole_archive(options
.whole_archive());
1265 this->set_incremental_disposition(options
.incremental_disposition());
1268 DEFINE_posdep(as_needed
, bool);
1269 DEFINE_posdep(Bdynamic
, bool);
1270 DEFINE_posdep(format_enum
, General_options::Object_format
);
1271 DEFINE_posdep(whole_archive
, bool);
1272 DEFINE_posdep(incremental_disposition
, Incremental_disposition
);
1275 // This is a General_options with everything set to its default
1276 // value. A Position_dependent_options created with no argument
1277 // will take its values from here.
1278 static General_options default_options_
;
1282 // A single file or library argument from the command line.
1284 class Input_file_argument
1287 enum Input_file_type
1289 // A regular file, name used as-is, not searched.
1290 INPUT_FILE_TYPE_FILE
,
1291 // A library name. When used, "lib" will be prepended and ".so" or
1292 // ".a" appended to make a filename, and that filename will be searched
1293 // for using the -L paths.
1294 INPUT_FILE_TYPE_LIBRARY
,
1295 // A regular file, name used as-is, but searched using the -L paths.
1296 INPUT_FILE_TYPE_SEARCHED_FILE
1299 // name: file name or library name
1300 // type: the type of this input file.
1301 // extra_search_path: an extra directory to look for the file, prior
1302 // to checking the normal library search path. If this is "",
1303 // then no extra directory is added.
1304 // just_symbols: whether this file only defines symbols.
1305 // options: The position dependent options at this point in the
1306 // command line, such as --whole-archive.
1307 Input_file_argument()
1308 : name_(), type_(INPUT_FILE_TYPE_FILE
), extra_search_path_(""),
1309 just_symbols_(false), options_()
1312 Input_file_argument(const char* name
, Input_file_type type
,
1313 const char* extra_search_path
,
1315 const Position_dependent_options
& options
)
1316 : name_(name
), type_(type
), extra_search_path_(extra_search_path
),
1317 just_symbols_(just_symbols
), options_(options
)
1320 // You can also pass in a General_options instance instead of a
1321 // Position_dependent_options. In that case, we extract the
1322 // position-independent vars from the General_options and only store
1324 Input_file_argument(const char* name
, Input_file_type type
,
1325 const char* extra_search_path
,
1327 const General_options
& options
)
1328 : name_(name
), type_(type
), extra_search_path_(extra_search_path
),
1329 just_symbols_(just_symbols
), options_(options
)
1334 { return this->name_
.c_str(); }
1336 const Position_dependent_options
&
1338 { return this->options_
; }
1342 { return type_
== INPUT_FILE_TYPE_LIBRARY
; }
1345 is_searched_file() const
1346 { return type_
== INPUT_FILE_TYPE_SEARCHED_FILE
; }
1349 extra_search_path() const
1351 return (this->extra_search_path_
.empty()
1353 : this->extra_search_path_
.c_str());
1356 // Return whether we should only read symbols from this file.
1358 just_symbols() const
1359 { return this->just_symbols_
; }
1361 // Return whether this file may require a search using the -L
1364 may_need_search() const
1366 return (this->is_lib()
1367 || this->is_searched_file()
1368 || !this->extra_search_path_
.empty());
1372 // We use std::string, not const char*, here for convenience when
1373 // using script files, so that we do not have to preserve the string
1376 Input_file_type type_
;
1377 std::string extra_search_path_
;
1379 Position_dependent_options options_
;
1382 // A file or library, or a group, from the command line.
1384 class Input_argument
1387 // Create a file or library argument.
1388 explicit Input_argument(Input_file_argument file
)
1389 : is_file_(true), file_(file
), group_(NULL
)
1392 // Create a group argument.
1393 explicit Input_argument(Input_file_group
* group
)
1394 : is_file_(false), group_(group
)
1397 // Return whether this is a file.
1400 { return this->is_file_
; }
1402 // Return whether this is a group.
1405 { return !this->is_file_
; }
1407 // Return the information about the file.
1408 const Input_file_argument
&
1411 gold_assert(this->is_file_
);
1415 // Return the information about the group.
1416 const Input_file_group
*
1419 gold_assert(!this->is_file_
);
1420 return this->group_
;
1426 gold_assert(!this->is_file_
);
1427 return this->group_
;
1432 Input_file_argument file_
;
1433 Input_file_group
* group_
;
1436 typedef std::vector
<Input_argument
> Input_argument_list
;
1438 // A group from the command line. This is a set of arguments within
1439 // --start-group ... --end-group.
1441 class Input_file_group
1444 typedef Input_argument_list::const_iterator const_iterator
;
1450 // Add a file to the end of the group.
1452 add_file(const Input_file_argument
& arg
)
1453 { this->files_
.push_back(Input_argument(arg
)); }
1455 // Iterators to iterate over the group contents.
1459 { return this->files_
.begin(); }
1463 { return this->files_
.end(); }
1466 Input_argument_list files_
;
1469 // A list of files from the command line or a script.
1471 class Input_arguments
1474 typedef Input_argument_list::const_iterator const_iterator
;
1477 : input_argument_list_(), in_group_(false)
1482 add_file(const Input_file_argument
& arg
);
1484 // Start a group (the --start-group option).
1488 // End a group (the --end-group option).
1492 // Return whether we are currently in a group.
1495 { return this->in_group_
; }
1497 // The number of entries in the list.
1500 { return this->input_argument_list_
.size(); }
1502 // Iterators to iterate over the list of input files.
1506 { return this->input_argument_list_
.begin(); }
1510 { return this->input_argument_list_
.end(); }
1512 // Return whether the list is empty.
1515 { return this->input_argument_list_
.empty(); }
1518 Input_argument_list input_argument_list_
;
1523 // All the information read from the command line. These are held in
1524 // three separate structs: one to hold the options (--foo), one to
1525 // hold the filenames listed on the commandline, and one to hold
1526 // linker script information. This third is not a subset of the other
1527 // two because linker scripts can be specified either as options (via
1528 // -T) or as a file.
1533 typedef Input_arguments::const_iterator const_iterator
;
1537 // Process the command line options. This will exit with an
1538 // appropriate error message if an unrecognized option is seen.
1540 process(int argc
, const char** argv
);
1542 // Process one command-line option. This takes the index of argv to
1543 // process, and returns the index for the next option. no_more_options
1544 // is set to true if argv[i] is "--".
1546 process_one_option(int argc
, const char** argv
, int i
,
1547 bool* no_more_options
);
1549 // Get the general options.
1550 const General_options
&
1552 { return this->options_
; }
1554 // Get the position dependent options.
1555 const Position_dependent_options
&
1556 position_dependent_options() const
1557 { return this->position_options_
; }
1559 // Get the linker-script options.
1562 { return this->script_options_
; }
1564 // Finalize the version-script options and return them.
1565 const Version_script_info
&
1568 // Get the input files.
1571 { return this->inputs_
; }
1573 // The number of input files.
1575 number_of_input_files() const
1576 { return this->inputs_
.size(); }
1578 // Iterators to iterate over the list of input files.
1582 { return this->inputs_
.begin(); }
1586 { return this->inputs_
.end(); }
1589 Command_line(const Command_line
&);
1590 Command_line
& operator=(const Command_line
&);
1592 // This is a dummy class to provide a constructor that runs before
1593 // the constructor for the General_options. The Pre_options constructor
1594 // is used as a hook to set the flag enabling the options to register
1596 struct Pre_options
{
1600 // This must come before options_!
1601 Pre_options pre_options_
;
1602 General_options options_
;
1603 Position_dependent_options position_options_
;
1604 Script_options script_options_
;
1605 Input_arguments inputs_
;
1608 } // End namespace gold.
1610 #endif // !defined(GOLD_OPTIONS_H)