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[deliverable/binutils-gdb.git] / gold / options.h
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bae7f79e
ILT		 1// options.h -- handle command line options for gold -*- C++ -*-
2
5393d741 3// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
6cb15b7f
ILT		 4// Written by Ian Lance Taylor <iant@google.com>.
5
6// This file is part of gold.
7
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.
12
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.
17
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.
22
bae7f79e 23// General_options (from Command_line::options())
ee1fe73e 24// All the options (a.k.a. command-line flags)
bae7f79e
ILT		 25// Input_argument (from Command_line::inputs())
26// The list of input files, including -l options.
ee1fe73e
ILT		 27// Command_line
28// Everything we get from the command line -- the General_options
29// plus the Input_arguments.
30//
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).
bae7f79e
ILT		 35
36#ifndef GOLD_OPTIONS_H
37#define GOLD_OPTIONS_H
38
ca3a67a5 39#include <cstdlib>
cbb93e63 40#include <cstring>
bae7f79e 41#include <list>
a192ba05 42#include <map>
61ba1cf9 43#include <string>
92e059d8 44#include <vector>
bae7f79e 45
0daa6f62 46#include "elfcpp.h"
3c2fafa5
ILT		 47#include "script.h"
48
bae7f79e
ILT		 49namespace gold
50{
51
52class Command_line;
ee1fe73e
ILT		 53class General_options;
54class Search_directory;
ead1e424 55class Input_file_group;
b0193076 56class Input_file_lib;
3c2fafa5 57class Position_dependent_options;
0daa6f62 58class Target;
89fc3421 59class Plugin_manager;
cdc29364 60class Script_info;
bae7f79e 61
266d0a74
ILT		 62// Incremental build action for a specific file, as selected by the user.
63
64enum Incremental_disposition
65{
221597a5
CC		 66 // Startup files that appear before the first disposition option.
67 // These will default to INCREMENTAL_CHECK unless the
68 // --incremental-startup-unchanged option is given.
69 // (For files added implicitly by gcc before any user options.)
70 INCREMENTAL_STARTUP,
266d0a74
ILT		 71 // Determine the status from the timestamp (default).
72 INCREMENTAL_CHECK,
73 // Assume the file changed from the previous build.
74 INCREMENTAL_CHANGED,
75 // Assume the file didn't change from the previous build.
76 INCREMENTAL_UNCHANGED
77};
78
ee1fe73e
ILT		 79// The nested namespace is to contain all the global variables and
80// structs that need to be defined in the .h file, but do not need to
81// be used outside this class.
c7912668
ILT		 82namespace options
83{
ee1fe73e 84typedef std::vector<Search_directory> Dir_list;
c5818ff1 85typedef Unordered_set<std::string> String_set;
ee1fe73e
ILT		 86
87// These routines convert from a string option to various types.
88// Each gives a fatal error if it cannot parse the argument.
89
90extern void
91parse_bool(const char* option_name, const char* arg, bool* retval);
92
c0a62865
DK		 93extern void
94parse_int(const char* option_name, const char* arg, int* retval);
95
ee1fe73e
ILT		 96extern void
97parse_uint(const char* option_name, const char* arg, int* retval);
98
99extern void
c18476e7
ILT		 100parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
101
102extern void
103parse_double(const char* option_name, const char* arg, double* retval);
ee1fe73e 104
9fbd3822
CC		 105extern void
106parse_percent(const char* option_name, const char* arg, double* retval);
107
ee1fe73e
ILT		 108extern void
109parse_string(const char* option_name, const char* arg, const char** retval);
110
086a1841
ILT		 111extern void
112parse_optional_string(const char* option_name, const char* arg,
113 const char** retval);
114
ee1fe73e
ILT		 115extern void
116parse_dirlist(const char* option_name, const char* arg, Dir_list* retval);
117
c5818ff1
CC		 118extern void
119parse_set(const char* option_name, const char* arg, String_set* retval);
120
ee1fe73e
ILT		 121extern void
122parse_choices(const char* option_name, const char* arg, const char** retval,
123 const char* choices[], int num_choices);
124
125struct Struct_var;
126
127// Most options have both a shortname (one letter) and a longname.
128// This enum controls how many dashes are expected for longname access
129// -- shortnames always use one dash. Most longnames will accept
130// either one dash or two; the only difference between ONE_DASH and
131// TWO_DASHES is how we print the option in --help. However, some
132// longnames require two dashes, and some require only one. The
133// special value DASH_Z means that the option is preceded by "-z".
134enum Dashes
135{
136 ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z
137};
138
139// LONGNAME is the long-name of the option with dashes converted to
140// underscores, or else the short-name if the option has no long-name.
141// It is never the empty string.
142// DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
143// SHORTNAME is the short-name of the option, as a char, or '\0' if the
144// option has no short-name. If the option has no long-name, you
145// should specify the short-name in *both* VARNAME and here.
146// DEFAULT_VALUE is the value of the option if not specified on the
147// commandline, as a string.
148// HELPSTRING is the descriptive text used with the option via --help
149// HELPARG is how you define the argument to the option.
150// --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
151// HELPARG should be NULL iff the option is a bool and takes no arg.
086a1841
ILT		 152// OPTIONAL_ARG is true if this option takes an optional argument. An
153// optional argument must be specifid as --OPTION=VALUE, not
154// --OPTION VALUE.
ee1fe73e
ILT		 155// READER provides parse_to_value, which is a function that will convert
156// a char* argument into the proper type and store it in some variable.
157// A One_option struct initializes itself with the global list of options
158// at constructor time, so be careful making one of these.
159struct One_option
160{
161 std::string longname;
162 Dashes dashes;
163 char shortname;
164 const char* default_value;
165 const char* helpstring;
166 const char* helparg;
086a1841 167 bool optional_arg;
ee1fe73e
ILT		 168 Struct_var* reader;
169
170 One_option(const char* ln, Dashes d, char sn, const char* dv,
086a1841 171 const char* hs, const char* ha, bool oa, Struct_var* r)
ee1fe73e 172 : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""),
086a1841 173 helpstring(hs), helparg(ha), optional_arg(oa), reader(r)
ee1fe73e
ILT		 174 {
175 // In longname, we convert all underscores to dashes, since GNU
176 // style uses dashes in option names. longname is likely to have
177 // underscores in it because it's also used to declare a C++
178 // function.
179 const char* pos = strchr(this->longname.c_str(), '_');
180 for (; pos; pos = strchr(pos, '_'))
181 this->longname[pos - this->longname.c_str()] = '-';
182
183 // We only register ourselves if our helpstring is not NULL. This
184 // is to support the "no-VAR" boolean variables, which we
185 // conditionally turn on by defining "no-VAR" help text.
186 if (this->helpstring)
187 this->register_option();
188 }
189
190 // This option takes an argument iff helparg is not NULL.
191 bool
192 takes_argument() const
193 { return this->helparg != NULL; }
194
086a1841
ILT		 195 // Whether the argument is optional.
196 bool
197 takes_optional_argument() const
198 { return this->optional_arg; }
199
ee1fe73e
ILT		 200 // Register this option with the global list of options.
201 void
202 register_option();
203
204 // Print this option to stdout (used with --help).
205 void
206 print() const;
207};
208
209// All options have a Struct_##varname that inherits from this and
210// actually implements parse_to_value for that option.
211struct Struct_var
212{
213 // OPTION: the name of the option as specified on the commandline,
214 // including leading dashes, and any text following the option:
215 // "-O", "--defsym=mysym=0x1000", etc.
216 // ARG: the arg associated with this option, or NULL if the option
217 // takes no argument: "2", "mysym=0x1000", etc.
218 // CMDLINE: the global Command_line object. Used by DEFINE_special.
219 // OPTIONS: the global General_options object. Used by DEFINE_special.
220 virtual void
221 parse_to_value(const char* option, const char* arg,
222 Command_line* cmdline, General_options* options) = 0;
223 virtual
224 ~Struct_var() // To make gcc happy.
225 { }
226};
bae7f79e 227
ee1fe73e
ILT		 228// This is for "special" options that aren't of any predefined type.
229struct Struct_special : public Struct_var
230{
231 // If you change this, change the parse-fn in DEFINE_special as well.
232 typedef void (General_options::*Parse_function)(const char*, const char*,
233 Command_line*);
234 Struct_special(const char* varname, Dashes dashes, char shortname,
235 Parse_function parse_function,
236 const char* helpstring, const char* helparg)
086a1841 237 : option(varname, dashes, shortname, "", helpstring, helparg, false, this),
ee1fe73e
ILT		 238 parse(parse_function)
239 { }
240
2ea97941 241 void parse_to_value(const char* option, const char* arg,
ee1fe73e 242 Command_line* cmdline, General_options* options)
2ea97941 243 { (options->*(this->parse))(option, arg, cmdline); }
ee1fe73e
ILT		 244
245 One_option option;
246 Parse_function parse;
247};
248
249} // End namespace options.
250
251
252// These are helper macros use by DEFINE_uint64/etc below.
253// This macro is used inside the General_options_ class, so defines
254// var() and set_var() as General_options methods. Arguments as are
255// for the constructor for One_option. param_type__ is the same as
256// type__ for built-in types, and "const type__ &" otherwise.
e96c574b
DK		 257//
258// When we define the linker command option "assert", the macro argument
259// varname__ of DEFINE_var below will be replaced by "assert". On Mac OSX
260// assert.h is included implicitly by one of the library headers we use. To
261// avoid unintended macro substitution of "assert()", we need to enclose
262// varname__ with parenthese.
ee1fe73e
ILT		 263#define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
264 default_value_as_string__, helpstring__, helparg__, \
086a1841 265 optional_arg__, type__, param_type__, parse_fn__) \
ee1fe73e
ILT		 266 public: \
267 param_type__ \
e96c574b 268 (varname__)() const \
ee1fe73e
ILT		 269 { return this->varname__##_.value; } \
270 \
271 bool \
272 user_set_##varname__() const \
273 { return this->varname__##_.user_set_via_option; } \
274 \
2b706932
ILT		 275 void \
276 set_user_set_##varname__() \
277 { this->varname__##_.user_set_via_option = true; } \
278 \
ee1fe73e
ILT		 279 private: \
280 struct Struct_##varname__ : public options::Struct_var \
281 { \
282 Struct_##varname__() \
283 : option(#varname__, dashes__, shortname__, default_value_as_string__, \
086a1841 284 helpstring__, helparg__, optional_arg__, this), \
ee1fe73e
ILT		 285 user_set_via_option(false), value(default_value__) \
286 { } \
287 \
288 void \
289 parse_to_value(const char* option_name, const char* arg, \
290 Command_line*, General_options*) \
291 { \
292 parse_fn__(option_name, arg, &this->value); \
293 this->user_set_via_option = true; \
294 } \
295 \
296 options::One_option option; \
297 bool user_set_via_option; \
298 type__ value; \
299 }; \
300 Struct_##varname__ varname__##_; \
301 void \
302 set_##varname__(param_type__ value) \
303 { this->varname__##_.value = value; }
304
305// These macros allow for easy addition of a new commandline option.
306
307// If no_helpstring__ is not NULL, then in addition to creating
d98bc257
ILT		 308// VARNAME, we also create an option called no-VARNAME (or, for a -z
309// option, noVARNAME).
ee1fe73e
ILT		 310#define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
311 helpstring__, no_helpstring__) \
312 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
313 default_value__ ? "true" : "false", helpstring__, NULL, \
086a1841 314 false, bool, bool, options::parse_bool) \
ee1fe73e
ILT		 315 struct Struct_no_##varname__ : public options::Struct_var \
316 { \
d98bc257
ILT		 317 Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
318 ? "no" #varname__ \
319 : "no-" #varname__), \
320 dashes__, '\0', \
ee1fe73e 321 default_value__ ? "false" : "true", \
086a1841 322 no_helpstring__, NULL, false, this) \
ee1fe73e
ILT		 323 { } \
324 \
325 void \
326 parse_to_value(const char*, const char*, \
327 Command_line*, General_options* options) \
41263c05
DK		 328 { \
329 options->set_##varname__(false); \
330 options->set_user_set_##varname__(); \
331 } \
ee1fe73e
ILT		 332 \
333 options::One_option option; \
334 }; \
335 Struct_no_##varname__ no_##varname__##_initializer_
336
7c414435
DM		 337#define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
338 helpstring__, no_helpstring__) \
339 DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
340 default_value__ ? "true" : "false", helpstring__, NULL, \
341 false, bool, bool, options::parse_bool) \
342 struct Struct_disable_##varname__ : public options::Struct_var \
343 { \
344 Struct_disable_##varname__() : option("disable-" #varname__, \
345 dashes__, '\0', \
346 default_value__ ? "false" : "true", \
347 no_helpstring__, NULL, false, this) \
348 { } \
349 \
350 void \
351 parse_to_value(const char*, const char*, \
352 Command_line*, General_options* options) \
353 { options->set_enable_##varname__(false); } \
354 \
355 options::One_option option; \
356 }; \
357 Struct_disable_##varname__ disable_##varname__##_initializer_
358
c0a62865
DK		 359#define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
360 helpstring__, helparg__) \
361 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
362 #default_value__, helpstring__, helparg__, false, \
363 int, int, options::parse_int)
364
ee1fe73e
ILT		 365#define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
366 helpstring__, helparg__) \
367 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
086a1841 368 #default_value__, helpstring__, helparg__, false, \
ee1fe73e
ILT		 369 int, int, options::parse_uint)
370
371#define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
372 helpstring__, helparg__) \
373 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
086a1841 374 #default_value__, helpstring__, helparg__, false, \
ee1fe73e
ILT		 375 uint64_t, uint64_t, options::parse_uint64)
376
c18476e7
ILT		 377#define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
378 helpstring__, helparg__) \
379 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
086a1841 380 #default_value__, helpstring__, helparg__, false, \
c18476e7
ILT		 381 double, double, options::parse_double)
382
9fbd3822
CC		 383#define DEFINE_percent(varname__, dashes__, shortname__, default_value__, \
384 helpstring__, helparg__) \
385 DEFINE_var(varname__, dashes__, shortname__, default_value__ / 100.0, \
386 #default_value__, helpstring__, helparg__, false, \
387 double, double, options::parse_percent)
388
ee1fe73e
ILT		 389#define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
390 helpstring__, helparg__) \
391 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
086a1841 392 default_value__, helpstring__, helparg__, false, \
ee1fe73e
ILT		 393 const char*, const char*, options::parse_string)
394
395// This is like DEFINE_string, but we convert each occurrence to a
396// Search_directory and store it in a vector. Thus we also have the
397// add_to_VARNAME() method, to append to the vector.
398#define DEFINE_dirlist(varname__, dashes__, shortname__, \
399 helpstring__, helparg__) \
400 DEFINE_var(varname__, dashes__, shortname__, , \
086a1841 401 "", helpstring__, helparg__, false, options::Dir_list, \
ee1fe73e
ILT		 402 const options::Dir_list&, options::parse_dirlist) \
403 void \
404 add_to_##varname__(const char* new_value) \
405 { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
406 void \
407 add_search_directory_to_##varname__(const Search_directory& dir) \
408 { this->varname__##_.value.push_back(dir); }
409
c5818ff1
CC		 410// This is like DEFINE_string, but we store a set of strings.
411#define DEFINE_set(varname__, dashes__, shortname__, \
412 helpstring__, helparg__) \
413 DEFINE_var(varname__, dashes__, shortname__, , \
414 "", helpstring__, helparg__, false, options::String_set, \
415 const options::String_set&, options::parse_set) \
416 public: \
417 bool \
418 any_##varname__() const \
419 { return !this->varname__##_.value.empty(); } \
f3e9c5c5 420 \
c5818ff1
CC		 421 bool \
422 is_##varname__(const char* symbol) const \
423 { \
424 return (!this->varname__##_.value.empty() \
425 && (this->varname__##_.value.find(std::string(symbol)) \
426 != this->varname__##_.value.end())); \
f3e9c5c5
ILT		 427 } \
428 \
429 options::String_set::const_iterator \
430 varname__##_begin() const \
431 { return this->varname__##_.value.begin(); } \
432 \
433 options::String_set::const_iterator \
434 varname__##_end() const \
435 { return this->varname__##_.value.end(); }
c5818ff1 436
ee1fe73e
ILT		 437// When you have a list of possible values (expressed as string)
438// After helparg__ should come an initializer list, like
439// {"foo", "bar", "baz"}
440#define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
441 helpstring__, helparg__, ...) \
442 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
086a1841 443 default_value__, helpstring__, helparg__, false, \
ee1fe73e
ILT		 444 const char*, const char*, parse_choices_##varname__) \
445 private: \
446 static void parse_choices_##varname__(const char* option_name, \
447 const char* arg, \
448 const char** retval) { \
449 const char* choices[] = __VA_ARGS__; \
450 options::parse_choices(option_name, arg, retval, \
451 choices, sizeof(choices) / sizeof(*choices)); \
452 }
453
2b706932
ILT		 454// This is like DEFINE_bool, but VARNAME is the name of a different
455// option. This option becomes an alias for that one. INVERT is true
456// if this option is an inversion of the other one.
457#define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
458 helpstring__, no_helpstring__, invert__) \
459 private: \
460 struct Struct_##option__ : public options::Struct_var \
461 { \
462 Struct_##option__() \
463 : option(#option__, dashes__, shortname__, "", helpstring__, \
464 NULL, false, this) \
465 { } \
466 \
467 void \
468 parse_to_value(const char*, const char*, \
469 Command_line*, General_options* options) \
470 { \
471 options->set_##varname__(!invert__); \
472 options->set_user_set_##varname__(); \
473 } \
474 \
475 options::One_option option; \
476 }; \
477 Struct_##option__ option__##_; \
478 \
479 struct Struct_no_##option__ : public options::Struct_var \
480 { \
481 Struct_no_##option__() \
482 : option((dashes__ == options::DASH_Z \
483 ? "no" #option__ \
484 : "no-" #option__), \
485 dashes__, '\0', "", no_helpstring__, \
486 NULL, false, this) \
487 { } \
488 \
489 void \
490 parse_to_value(const char*, const char*, \
491 Command_line*, General_options* options) \
492 { \
493 options->set_##varname__(invert__); \
494 options->set_user_set_##varname__(); \
495 } \
496 \
497 options::One_option option; \
498 }; \
499 Struct_no_##option__ no_##option__##_initializer_
500
214383dd
ILT		 501// This is like DEFINE_uint64, but VARNAME is the name of a different
502// option. This option becomes an alias for that one.
503#define DEFINE_uint64_alias(option__, varname__, dashes__, shortname__, \
504 helpstring__, helparg__) \
505 private: \
506 struct Struct_##option__ : public options::Struct_var \
507 { \
508 Struct_##option__() \
509 : option(#option__, dashes__, shortname__, "", helpstring__, \
510 helparg__, false, this) \
511 { } \
512 \
513 void \
514 parse_to_value(const char* option_name, const char* arg, \
515 Command_line*, General_options* options) \
516 { \
517 uint64_t value; \
518 options::parse_uint64(option_name, arg, &value); \
519 options->set_##varname__(value); \
520 options->set_user_set_##varname__(); \
521 } \
522 \
523 options::One_option option; \
524 }; \
525 Struct_##option__ option__##_;
526
ee1fe73e
ILT		 527// This is used for non-standard flags. It defines no functions; it
528// just calls General_options::parse_VARNAME whenever the flag is
529// seen. We declare parse_VARNAME as a static member of
530// General_options; you are responsible for defining it there.
531// helparg__ should be NULL iff this special-option is a boolean.
532#define DEFINE_special(varname__, dashes__, shortname__, \
533 helpstring__, helparg__) \
534 private: \
535 void parse_##varname__(const char* option, const char* arg, \
536 Command_line* inputs); \
537 struct Struct_##varname__ : public options::Struct_special \
538 { \
539 Struct_##varname__() \
540 : options::Struct_special(#varname__, dashes__, shortname__, \
541 &General_options::parse_##varname__, \
542 helpstring__, helparg__) \
543 { } \
544 }; \
545 Struct_##varname__ varname__##_initializer_
bae7f79e 546
086a1841
ILT		 547// An option that takes an optional string argument. If the option is
548// used with no argument, the value will be the default, and
549// user_set_via_option will be true.
550#define DEFINE_optional_string(varname__, dashes__, shortname__, \
551 default_value__, \
552 helpstring__, helparg__) \
553 DEFINE_var(varname__, dashes__, shortname__, default_value__, \
554 default_value__, helpstring__, helparg__, true, \
555 const char*, const char*, options::parse_optional_string)
bae7f79e 556
ad2d6943
ILT		 557// A directory to search. For each directory we record whether it is
558// in the sysroot. We need to know this so that, if a linker script
559// is found within the sysroot, we will apply the sysroot to any files
560// named by that script.
561
562class Search_directory
563{
564 public:
565 // We need a default constructor because we put this in a
566 // std::vector.
567 Search_directory()
568 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
569 { }
570
571 // This is the usual constructor.
3f3cddf1 572 Search_directory(const std::string& name, bool put_in_sysroot)
2ea97941 573 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
15893b88
ILT		 574 {
575 if (this->name_.empty())
576 this->name_ = ".";
577 }
ad2d6943
ILT		 578
579 // This is called if we have a sysroot. The sysroot is prefixed to
580 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
581 // set to true for any enries which are in the sysroot (this will
582 // naturally include any entries for which put_in_sysroot_ is true).
583 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
584 // passing SYSROOT to lrealpath.
585 void
586 add_sysroot(const char* sysroot, const char* canonical_sysroot);
587
588 // Get the directory name.
589 const std::string&
590 name() const
591 { return this->name_; }
592
593 // Return whether this directory is in the sysroot.
594 bool
595 is_in_sysroot() const
596 { return this->is_in_sysroot_; }
597
fd9d194f
ILT		 598 // Return whether this is considered a system directory.
599 bool
600 is_system_directory() const
601 { return this->put_in_sysroot_ || this->is_in_sysroot_; }
602
ad2d6943 603 private:
fd9d194f 604 // The directory name.
ad2d6943 605 std::string name_;
fd9d194f
ILT		 606 // True if the sysroot should be added as a prefix for this
607 // directory (if there is a sysroot). This is true for system
608 // directories that we search by default.
ad2d6943 609 bool put_in_sysroot_;
fd9d194f
ILT		 610 // True if this directory is in the sysroot (if there is a sysroot).
611 // This is true if there is a sysroot and either 1) put_in_sysroot_
612 // is true, or 2) the directory happens to be in the sysroot based
613 // on a pathname comparison.
ad2d6943
ILT		 614 bool is_in_sysroot_;
615};
616
bae7f79e
ILT		 617class General_options
618{
ee1fe73e
ILT		 619 private:
620 // NOTE: For every option that you add here, also consider if you
621 // should add it to Position_dependent_options.
622 DEFINE_special(help, options::TWO_DASHES, '\0',
a4d4b13f 623 N_("Report usage information"), NULL);
ee1fe73e 624 DEFINE_special(version, options::TWO_DASHES, 'v',
a4d4b13f 625 N_("Report version information"), NULL);
b5be4a7c
DM		 626 DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0',
627 N_("Report version and target information"), NULL);
ee1fe73e 628
fee2edb1
ILT		 629 // These options are sorted approximately so that for each letter in
630 // the alphabet, we show the option whose shortname is that letter
631 // (if any) and then every longname that starts with that letter (in
632 // alphabetical order). For both, lowercase sorts before uppercase.
633 // The -z options come last.
634
7eaea549
ILT		 635 DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false,
636 N_("Not supported"),
637 N_("Do not copy DT_NEEDED tags from shared libraries"));
638
9c4ae156
ILT		 639 DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES,
640 '\0', N_("Allow multiple definitions of symbols"),
641 N_("Do not allow multiple definitions"), false);
30bc8c46 642
ee1fe73e 643 DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false,
a4d4b13f
ILT		 644 N_("Allow unresolved references in shared libraries"),
645 N_("Do not allow unresolved references in shared libraries"));
ee1fe73e
ILT		 646
647 DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false,
7eaea549
ILT		 648 N_("Only set DT_NEEDED for shared libraries if used"),
649 N_("Always DT_NEEDED for shared libraries"));
ee1fe73e 650
fe35d28d
ILT		 651 DEFINE_enum(assert, options::ONE_DASH, '\0', NULL,
652 N_("Ignored"), N_("[ignored]"),
653 {"definitions", "nodefinitions", "nosymbolic", "pure-text"});
654
fee2edb1
ILT		 655 // This should really be an "enum", but it's too easy for folks to
656 // forget to update the list as they add new targets. So we just
657 // accept any string. We'll fail later (when the string is parsed),
658 // if the target isn't actually supported.
659 DEFINE_string(format, options::TWO_DASHES, 'b', "elf",
660 N_("Set input format"), ("[elf,binary]"));
661
ee1fe73e 662 DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true,
a4d4b13f 663 N_("-l searches for shared libraries"), NULL);
2b706932
ILT		 664 DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0',
665 N_("-l does not search for shared libraries"), NULL,
666 true);
b821d13c
ILT		 667 DEFINE_bool_alias(dy, Bdynamic, options::ONE_DASH, '\0',
668 N_("alias for -Bdynamic"), NULL, false);
669 DEFINE_bool_alias(dn, Bdynamic, options::ONE_DASH, '\0',
670 N_("alias for -Bstatic"), NULL, true);
ee1fe73e 671
e2153196
ILT		 672 DEFINE_bool(Bgroup, options::ONE_DASH, '\0', false,
673 N_("Use group name lookup rules for shared library"), NULL);
674
ee1fe73e 675 DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false,
a4d4b13f 676 N_("Bind defined symbols locally"), NULL);
ee1fe73e 677
f1f70eae
ILT		 678 DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false,
679 N_("Bind defined function symbols locally"), NULL);
680
e7c5ea40 681 DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "tree",
8ed814a9
ILT		 682 N_("Generate build ID note"),
683 N_("[=STYLE]"));
684
e7c5ea40
CC		 685 DEFINE_uint64(build_id_chunk_size_for_treehash,
686 options::TWO_DASHES, '\0', 2 << 20,
687 N_("Chunk size for '--build-id=tree'"), N_("SIZE"));
688
689 DEFINE_uint64(build_id_min_file_size_for_treehash, options::TWO_DASHES,
690 '\0', 40 << 20,
691 N_("Minimum output file size for '--build-id=tree' to work"
692 " differently than '--build-id=sha1'"), N_("SIZE"));
693
34810851
ILT		 694 DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true,
695 N_("Check segment addresses for overlaps (default)"),
696 N_("Do not check segment addresses for overlaps"));
697
ee1fe73e
ILT		 698#ifdef HAVE_ZLIB_H
699 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
a4d4b13f
ILT		 700 N_("Compress .debug_* sections in the output file"),
701 ("[none,zlib]"),
ee1fe73e
ILT		 702 {"none", "zlib"});
703#else
704 DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
a4d4b13f
ILT		 705 N_("Compress .debug_* sections in the output file"),
706 N_("[none]"),
ee1fe73e
ILT		 707 {"none"});
708#endif
0dfbdef4 709
7eaea549
ILT		 710 DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false,
711 N_("Not supported"),
712 N_("Do not copy DT_NEEDED tags from shared libraries"));
713
dde3f402
ILT		 714 DEFINE_bool(cref, options::TWO_DASHES, '\0', false,
715 N_("Output cross reference table"),
716 N_("Do not output cross reference table"));
717
5393d741
ILT		 718 DEFINE_bool(ctors_in_init_array, options::TWO_DASHES, '\0', true,
719 N_("Use DT_INIT_ARRAY for all constructors (default)"),
720 N_("Handle constructors as directed by compiler"));
721
ee1fe73e 722 DEFINE_bool(define_common, options::TWO_DASHES, 'd', false,
a4d4b13f
ILT		 723 N_("Define common symbols"),
724 N_("Do not define common symbols"));
ee1fe73e 725 DEFINE_bool(dc, options::ONE_DASH, '\0', false,
a4d4b13f 726 N_("Alias for -d"), NULL);
ee1fe73e 727 DEFINE_bool(dp, options::ONE_DASH, '\0', false,
a4d4b13f 728 N_("Alias for -d"), NULL);
d391083d 729
fee2edb1 730 DEFINE_string(debug, options::TWO_DASHES, '\0', "",
2285a610
ILT		 731 N_("Turn on debugging"),
732 N_("[all,files,script,task][,...]"));
fee2edb1 733
ee1fe73e 734 DEFINE_special(defsym, options::TWO_DASHES, '\0',
a4d4b13f 735 N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
a6badf5a 736
086a1841
ILT		 737 DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
738 N_("Demangle C++ symbols in log messages"),
739 N_("[=STYLE]"));
740
741 DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
742 N_("Do not demangle C++ symbols in log messages"),
743 NULL);
fced7afd 744
ee1fe73e 745 DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
f30f86fa
ILT		 746 N_("Look for violations of the C++ One Definition Rule"),
747 N_("Do not look for violations of the C++ One Definition Rule"));
ee1fe73e 748
ebcc8304
ILT		 749 DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false,
750 N_("Delete all local symbols"), NULL);
bb04269c
DK		 751 DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
752 N_("Delete all temporary local symbols"), NULL);
753
c82fbeee
CS		 754 DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
755 N_("Add data symbols to dynamic symbols"), NULL);
756
757 DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
758 N_("Add C++ operator new/delete to dynamic symbols"), NULL);
759
760 DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
761 N_("Add C++ typeinfo to dynamic symbols"), NULL);
762
763 DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
764 N_("Read a list of dynamic symbols"), N_("FILE"));
765
ee1fe73e 766 DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
a4d4b13f 767 N_("Set program start address"), N_("ADDRESS"));
ee1fe73e 768
65514900
CC		 769 DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
770 N_("Exclude libraries from automatic export"),
771 N_(("lib,lib ...")));
772
ee1fe73e 773 DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
ee769c88
ILT		 774 N_("Export all dynamic symbols"),
775 N_("Do not export all dynamic symbols (default)"));
dbe717ef 776
31821be0
CC		 777 DEFINE_set(export_dynamic_symbol, options::TWO_DASHES, '\0',
778 N_("Export SYMBOL to dynamic symbol table"), N_("SYMBOL"));
779
7296d933
DK		 780 DEFINE_special(EB, options::ONE_DASH, '\0',
781 N_("Link big-endian objects."), NULL);
782
7296d933
DK		 783 DEFINE_special(EL, options::ONE_DASH, '\0',
784 N_("Link little-endian objects."), NULL);
785
f1ddb600
ILT		 786 DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
787 N_("Create exception frame header"), NULL);
788
ce0d1972
DK		 789 DEFINE_bool(enum_size_warning, options::TWO_DASHES, '\0', true, NULL,
790 N_("(ARM only) Do not warn about objects with incompatible "
791 "enum sizes"));
792
886288f1
ILT		 793 DEFINE_set(auxiliary, options::TWO_DASHES, 'f',
794 N_("Auxiliary filter for shared object symbol table"),
795 N_("SHLIB"));
796
797 DEFINE_string(filter, options::TWO_DASHES, 'F', NULL,
798 N_("Filter for shared object symbol table"),
799 N_("SHLIB"));
800
d82a5bcc
ILT		 801 DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
802 N_("Treat warnings as errors"),
803 N_("Do not treat warnings as errors"));
804
c6585162
ILT		 805 DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
806 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
807
41263c05
DK		 808 DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false,
809 N_("(ARM only) Fix binaries for Cortex-A8 erratum."),
810 N_("(ARM only) Do not fix binaries for Cortex-A8 erratum."));
811
a8e2273b
ILT		 812 DEFINE_bool(fix_arm1176, options::TWO_DASHES, '\0', true,
813 N_("(ARM only) Fix binaries for ARM1176 erratum."),
814 N_("(ARM only) Do not fix binaries for ARM1176 erratum."));
815
85fdf906
AH		 816 DEFINE_bool(merge_exidx_entries, options::TWO_DASHES, '\0', true,
817 N_("(ARM only) Merge exidx entries in debuginfo."),
818 N_("(ARM only) Do not merge exidx entries in debuginfo."));
819
9b2fd367
DK		 820 DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0',
821 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"),
822 NULL);
823
824 DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0',
825 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking "
826 "veneer"),
827 NULL);
828
fe35d28d
ILT		 829 DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
830 N_("Ignored"), NULL);
831
c1027032
CC		 832 DEFINE_bool(gdb_index, options::TWO_DASHES, '\0', false,
833 N_("Generate .gdb_index section"),
834 N_("Do not generate .gdb_index section"));
835
9634ed06
CC		 836 DEFINE_bool(gnu_unique, options::TWO_DASHES, '\0', true,
837 N_("Enable STB_GNU_UNIQUE symbol binding (default)"),
838 N_("Disable STB_GNU_UNIQUE symbol binding"));
839
ee1fe73e 840 DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
a4d4b13f 841 N_("Set shared library name"), N_("FILENAME"));
ee1fe73e 842
c18476e7
ILT		 843 DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
844 N_("Min fraction of empty buckets in dynamic hash"),
845 N_("FRACTION"));
846
13670ee6 847 DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
a4d4b13f 848 N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
13670ee6
ILT		 849 {"sysv", "gnu", "both"});
850
ee1fe73e 851 DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
a4d4b13f 852 N_("Set dynamic linker path"), N_("PROGRAM"));
ee1fe73e 853
8c21d9d3
CC		 854 DEFINE_special(incremental, options::TWO_DASHES, '\0',
855 N_("Do an incremental link if possible; "
856 "otherwise, do a full link and prepare output "
857 "for incremental linking"), NULL);
858
859 DEFINE_special(no_incremental, options::TWO_DASHES, '\0',
860 N_("Do a full link (default)"), NULL);
861
862 DEFINE_special(incremental_full, options::TWO_DASHES, '\0',
863 N_("Do a full link and "
864 "prepare output for incremental linking"), NULL);
865
866 DEFINE_special(incremental_update, options::TWO_DASHES, '\0',
867 N_("Do an incremental link; exit if not possible"), NULL);
266d0a74 868
aa92d6ed
CC		 869 DEFINE_string(incremental_base, options::TWO_DASHES, '\0', NULL,
870 N_("Set base file for incremental linking"
871 " (default is output file)"),
872 N_("FILE"));
873
266d0a74
ILT		 874 DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
875 N_("Assume files changed"), NULL);
876
877 DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
878 N_("Assume files didn't change"), NULL);
879
880 DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
881 N_("Use timestamps to check files (default)"), NULL);
882
221597a5
CC		 883 DEFINE_special(incremental_startup_unchanged, options::TWO_DASHES, '\0',
884 N_("Assume startup files unchanged "
885 "(files preceding this option)"), NULL);
886
9fbd3822
CC		 887 DEFINE_percent(incremental_patch, options::TWO_DASHES, '\0', 10,
888 N_("Amount of extra space to allocate for patches"),
889 N_("PERCENT"));
890
c6585162
ILT		 891 DEFINE_string(init, options::ONE_DASH, '\0', "_init",
892 N_("Call SYMBOL at load-time"), N_("SYMBOL"));
893
fee2edb1
ILT		 894 DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
895 N_("Read only symbol values from FILE"), N_("FILE"));
896
a2a5469e 897 DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0',
2c849493
ILT		 898 sizeof(void*) >= 8,
899 N_("Map whole files to memory (default on 64-bit hosts)"),
900 N_("Map relevant file parts to memory (default on 32-bit "
901 "hosts)"));
a2a5469e
CC		 902 DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true,
903 N_("Keep files mapped across passes (default)"),
904 N_("Release mapped files after each pass"));
2c849493 905
07a60597
ILT		 906 DEFINE_bool(ld_generated_unwind_info, options::TWO_DASHES, '\0', true,
907 N_("Generate unwind information for PLT (default)"),
908 N_("Do not generate unwind information for PLT"));
909
ee1fe73e 910 DEFINE_special(library, options::TWO_DASHES, 'l',
a4d4b13f 911 N_("Search for library LIBNAME"), N_("LIBNAME"));
bae7f79e 912
ee1fe73e 913 DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
a4d4b13f 914 N_("Add directory to search path"), N_("DIR"));
ee1fe73e 915
c6ac678d
ST		 916 DEFINE_bool(text_reorder, options::TWO_DASHES, '\0', true,
917 N_("Enable text section reordering for GCC section names "
918 "(default)"),
919 N_("Disable text section reordering for GCC section names"));
920
91e75c8a
RÁE		 921 DEFINE_bool(nostdlib, options::ONE_DASH, '\0', false,
922 N_(" Only search directories specified on the command line."),
923 NULL);
924
0f72bf6f
RÁE		 925 DEFINE_bool(rosegment, options::TWO_DASHES, '\0', false,
926 N_(" Put read-only non-executable sections in their own segment"),
927 NULL);
928
ee1fe73e 929 DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
03ef7571 930 N_("Set GNU linker emulation; obsolete"), N_("EMULATION"));
ee1fe73e 931
7c0640fa
CC		 932 DEFINE_bool(mmap_output_file, options::TWO_DASHES, '\0', true,
933 N_("Map the output file for writing (default)."),
934 N_("Do not map the output file for writing."));
935
7d9e3d98
ILT		 936 DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
937 N_("Write map file on standard output"), NULL);
938 DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
939 N_("MAPFILENAME"));
940
af6156ef
ILT		 941 DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
942 N_("Do not page align data"), NULL);
943 DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
944 N_("Do not page align data, do not make text readonly"),
945 N_("Page align data, make text readonly"));
946
50701cc1 947 DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', true,
7c414435
DM		 948 N_("Enable use of DT_RUNPATH and DT_FLAGS"),
949 N_("Disable use of DT_RUNPATH and DT_FLAGS"));
950
cdb0b8f5
ILT		 951 DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
952 N_("Create an output file even if errors occur"), NULL);
953
f3e9c5c5
ILT		 954 DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
955 N_("Report undefined symbols (even with --shared)"),
956 NULL, false);
957
ee1fe73e 958 DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
a4d4b13f 959 N_("Set output file name"), N_("FILE"));
ee1fe73e
ILT		 960
961 DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
a4d4b13f 962 N_("Optimize output file size"), N_("LEVEL"));
ee1fe73e 963
a4d4b13f
ILT		 964 DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
965 N_("Set output format"), N_("[binary]"));
ee1fe73e 966
7296d933
DK		 967 DEFINE_bool(p, options::ONE_DASH, '\0', false,
968 N_("(ARM only) Ignore for backward compatibility"), NULL);
969
374ad285
ILT		 970 DEFINE_bool(pie, options::ONE_DASH, '\0', false,
971 N_("Create a position independent executable"), NULL);
972 DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
973 N_("Create a position independent executable"), NULL,
974 false);
975
7296d933
DK		 976 DEFINE_bool(pipeline_knowledge, options::ONE_DASH, '\0', false,
977 NULL, N_("(ARM only) Ignore for backward compatibility"));
978
9e69ed50
AM		 979 DEFINE_var(plt_align, options::TWO_DASHES, '\0', 0, "5",
980 N_("(PowerPC64 only) Align PLT call stubs to fit cache lines"),
981 N_("[=P2ALIGN]"), true, int, int, options::parse_uint);
982
983 DEFINE_bool(plt_static_chain, options::TWO_DASHES, '\0', false,
984 N_("(PowerPC64 only) PLT call stubs should load r11"),
985 N_("(PowerPC64 only) PLT call stubs should not load r11"));
986
987 DEFINE_bool(plt_thread_safe, options::TWO_DASHES, '\0', false,
988 N_("(PowerPC64 only) PLT call stubs with load-load barrier"),
989 N_("(PowerPC64 only) PLT call stubs without barrier"));
990
89fc3421
CC		 991#ifdef ENABLE_PLUGINS
992 DEFINE_special(plugin, options::TWO_DASHES, '\0',
4674ecfc
CC		 993 N_("Load a plugin library"), N_("PLUGIN"));
994 DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
995 N_("Pass an option to the plugin"), N_("OPTION"));
89fc3421
CC		 996#endif
997
7c0640fa
CC		 998 DEFINE_bool(posix_fallocate, options::TWO_DASHES, '\0', true,
999 N_("Use posix_fallocate to reserve space in the output file"
1000 " (default)."),
1001 N_("Use fallocate or ftruncate to reserve space."));
1002
ac45a351
CC		 1003 DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
1004 N_("Preread archive symbols when multi-threaded"), NULL);
89fc3421 1005
f1ddb600
ILT		 1006 DEFINE_bool(print_output_format, options::TWO_DASHES, '\0', false,
1007 N_("Print default output format"), NULL);
1008
92de84a6
ILT		 1009 DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
1010 N_("Print symbols defined and used for each input"),
1011 N_("FILENAME"));
1012
b5be4a7c
DM		 1013 DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
1014 N_("Ignored for SVR4 compatibility"), NULL);
1015
ee1fe73e 1016 DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
a4d4b13f 1017 N_("Generate relocations in output"), NULL);
ee1fe73e
ILT		 1018
1019 DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
a4d4b13f 1020 N_("Generate relocatable output"), NULL);
ec69d6da
ILT		 1021 DEFINE_bool_alias(i, relocatable, options::EXACTLY_ONE_DASH, '\0',
1022 N_("Synonym for -r"), NULL, false);
ee1fe73e 1023
706e1f5e
ILT		 1024 DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
1025 N_("Relax branches on certain targets"), NULL);
1026
719328e1
ILT		 1027 DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL,
1028 N_("keep only symbols listed in this file"), N_("FILE"));
8c604651 1029
ee1fe73e
ILT		 1030 // -R really means -rpath, but can mean --just-symbols for
1031 // compatibility with GNU ld. -rpath is always -rpath, so we list
1032 // it separately.
1033 DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
a4d4b13f 1034 N_("Add DIR to runtime search path"), N_("DIR"));
ee1fe73e
ILT		 1035
1036 DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
a4d4b13f 1037 N_("Add DIR to runtime search path"), N_("DIR"));
ee1fe73e 1038
ee1fe73e 1039 DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
a4d4b13f
ILT		 1040 N_("Add DIR to link time shared library search path"),
1041 N_("DIR"));
ee1fe73e 1042
6e9ba2ca
ST		 1043 DEFINE_string(section_ordering_file, options::TWO_DASHES, '\0', NULL,
1044 N_("Layout sections in the order specified."),
1045 N_("FILENAME"));
1046
a192ba05
ILT		 1047 DEFINE_special(section_start, options::TWO_DASHES, '\0',
1048 N_("Set address of section"), N_("SECTION=ADDRESS"));
1049
fc59c572
ILT		 1050 DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL,
1051 N_("Sort common symbols by alignment"),
1052 N_("[={ascending,descending}]"));
1053
9e9e071b
ILT		 1054 DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5,
1055 N_("Dynamic tag slots to reserve (default 5)"),
1056 N_("COUNT"));
1057
ee1fe73e 1058 DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
a4d4b13f 1059 N_("Strip all symbols"), NULL);
fee2edb1
ILT		 1060 DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
1061 N_("Strip debugging information"), NULL);
62b01cb5
ILT		 1062 DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
1063 N_("Emit only debug line number information"), NULL);
ee1fe73e 1064 DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
a4d4b13f 1065 N_("Strip debug symbols that are unused by gdb "
fb1b895d 1066 "(at least versions <= 7.4)"), NULL);
fd06b4aa
CC		 1067 DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
1068 N_("Strip LTO intermediate code sections"), NULL);
ee1fe73e 1069
c0a62865 1070 DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
9e69ed50
AM		 1071 N_("(ARM, PowerPC only) The maximum distance from instructions "
1072 "in a group of sections to their stubs. Negative values mean "
1073 "stubs are always after (PowerPC before) the group. 1 means "
1074 "use default size.\n"),
c0a62865
DK		 1075 N_("SIZE"));
1076
f773f3d2
CC		 1077 DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
1078 N_("Use less memory and more disk I/O "
1079 "(included only for compatibility with GNU ld)"), NULL);
3b293544 1080
fe35d28d 1081 DEFINE_bool(shared, options::ONE_DASH, 'G', false,
a4d4b13f 1082 N_("Generate shared library"), NULL);
ee1fe73e 1083
3b293544
CF		 1084 DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
1085 N_("Generate shared library"), NULL);
1086
364c7fa5
ILT		 1087 DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
1088 N_("Stack size when -fsplit-stack function calls non-split"),
1089 N_("SIZE"));
1090
ee1fe73e
ILT		 1091 // This is not actually special in any way, but I need to give it
1092 // a non-standard accessor-function name because 'static' is a keyword.
1093 DEFINE_special(static, options::ONE_DASH, '\0',
a4d4b13f 1094 N_("Do not link against shared libraries"), NULL);
ee1fe73e 1095
032ce4e9
ST		 1096 DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
1097 N_("Identical Code Folding. "
21bb3914
ST		 1098 "\'--icf=safe\' Folds ctors, dtors and functions whose"
1099 " pointers are definitely not taken."),
032ce4e9
ST		 1100 ("[none,all,safe]"),
1101 {"none", "all", "safe"});
ef15dade
ST		 1102
1103 DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
1104 N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
1105
1106 DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
1107 N_("List folded identical sections on stderr"),
1108 N_("Do not list folded identical sections"));
1109
48c187ce
ST		 1110 DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
1111 N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
1112
6d03d481 1113 DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
266d0a74 1114 N_("Remove unused sections"),
6d03d481 1115 N_("Don't remove unused sections (default)"));
266d0a74 1116
6d03d481 1117 DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
266d0a74 1118 N_("List removed unused sections on stderr"),
6d03d481
ST		 1119 N_("Do not list removed unused sections"));
1120
ee1fe73e 1121 DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
a4d4b13f 1122 N_("Print resource usage statistics"), NULL);
ee1fe73e
ILT		 1123
1124 DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
a4d4b13f 1125 N_("Set target system root directory"), N_("DIR"));
ee1fe73e 1126
c5818ff1
CC		 1127 DEFINE_bool(trace, options::TWO_DASHES, 't', false,
1128 N_("Print the name of each input file"), NULL);
1129
ee1fe73e 1130 DEFINE_special(script, options::TWO_DASHES, 'T',
a4d4b13f 1131 N_("Read linker script"), N_("FILE"));
ee1fe73e
ILT		 1132
1133 DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
a4d4b13f
ILT		 1134 N_("Run the linker multi-threaded"),
1135 N_("Do not run the linker multi-threaded"));
ee1fe73e 1136 DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
a4d4b13f 1137 N_("Number of threads to use"), N_("COUNT"));
ee1fe73e 1138 DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
a4d4b13f 1139 N_("Number of threads to use in initial pass"), N_("COUNT"));
ee1fe73e 1140 DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
a4d4b13f 1141 N_("Number of threads to use in middle pass"), N_("COUNT"));
ee1fe73e 1142 DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
a4d4b13f 1143 N_("Number of threads to use in final pass"), N_("COUNT"));
ee1fe73e 1144
fee2edb1
ILT		 1145 DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
1146 N_("Set the address of the bss segment"), N_("ADDRESS"));
1147 DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
1148 N_("Set the address of the data segment"), N_("ADDRESS"));
1149 DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
1150 N_("Set the address of the text segment"), N_("ADDRESS"));
214383dd
ILT		 1151 DEFINE_uint64_alias(Ttext_segment, Ttext, options::ONE_DASH, '\0',
1152 N_("Set the address of the text segment"),
1153 N_("ADDRESS"));
fee2edb1 1154
d8f5a274
AM		 1155 DEFINE_bool(toc_optimize, options::TWO_DASHES, '\0', true,
1156 N_("(PowerPC64 only) Optimize TOC code sequences"),
1157 N_("(PowerPC64 only) Don't optimize TOC code sequences"));
1158
1159 DEFINE_bool(toc_sort, options::TWO_DASHES, '\0', true,
1160 N_("(PowerPC64 only) Sort TOC and GOT sections"),
1161 N_("(PowerPC64 only) Don't sort TOC and GOT sections"));
aba6bc71 1162
f3e9c5c5
ILT		 1163 DEFINE_set(undefined, options::TWO_DASHES, 'u',
1164 N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
2b706932 1165
beabb2c6
ILT		 1166 DEFINE_enum(unresolved_symbols, options::TWO_DASHES, '\0', NULL,
1167 N_("How to handle unresolved symbols"),
1168 ("ignore-all,report-all,ignore-in-object-files,"
1169 "ignore-in-shared-libs"),
1170 {"ignore-all", "report-all", "ignore-in-object-files",
1171 "ignore-in-shared-libs"});
1172
2285a610
ILT		 1173 DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
1174 N_("Synonym for --debug=files"), NULL);
1175
fee2edb1
ILT		 1176 DEFINE_special(version_script, options::TWO_DASHES, '\0',
1177 N_("Read version script"), N_("FILE"));
1178
1ae4d23b
ILT		 1179 DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false,
1180 N_("Warn about duplicate common symbols"),
1181 N_("Do not warn about duplicate common symbols (default)"));
1182
37a9ac43
ILT		 1183 DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
1184 N_("Ignored"), N_("Ignored"));
1185
83e17bd5
CC		 1186 DEFINE_bool(warn_execstack, options::TWO_DASHES, '\0', false,
1187 N_("Warn if the stack is executable"),
1188 N_("Do not warn if the stack is executable (default)"));
1189
7296d933
DK		 1190 DEFINE_bool(warn_mismatch, options::TWO_DASHES, '\0', true,
1191 NULL, N_("Don't warn about mismatched input files"));
1192
6eda8c29
ILT		 1193 DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false,
1194 N_("Ignored"), NULL);
1195
15f8229b
ILT		 1196 DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
1197 N_("Warn when skipping an incompatible library"),
1198 N_("Don't warn when skipping an incompatible library"));
1199
b9674e17
ILT		 1200 DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false,
1201 N_("Warn if text segment is not shareable"),
1202 N_("Do not warn if text segment is not shareable (default)"));
1203
dc3f80fe
ILT		 1204 DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false,
1205 N_("Report unresolved symbols as warnings"),
1206 NULL);
1207 DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols,
1208 options::TWO_DASHES, '\0',
1209 N_("Report unresolved symbols as errors"),
1210 NULL, true);
1211
ce0d1972
DK		 1212 DEFINE_bool(wchar_size_warning, options::TWO_DASHES, '\0', true, NULL,
1213 N_("(ARM only) Do not warn about objects with incompatible "
1214 "wchar_t sizes"));
1215
ee1fe73e 1216 DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
a4d4b13f
ILT		 1217 N_("Include all archive contents"),
1218 N_("Include only needed archive contents"));
ee1fe73e 1219
c5818ff1
CC		 1220 DEFINE_set(wrap, options::TWO_DASHES, '\0',
1221 N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
1222
1223 DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
1224 N_("Trace references to symbol"), N_("SYMBOL"));
0864d551 1225
62dfdd4d
ILT		 1226 DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true,
1227 N_("Allow unused version in script (default)"),
1228 N_("Do not allow unused version in script"));
1229
706e1f5e
ILT		 1230 DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
1231 N_("Default search path for Solaris compatibility"),
1232 N_("PATH"));
1233
ee1fe73e 1234 DEFINE_special(start_group, options::TWO_DASHES, '(',
a4d4b13f 1235 N_("Start a library search group"), NULL);
ee1fe73e 1236 DEFINE_special(end_group, options::TWO_DASHES, ')',
a4d4b13f 1237 N_("End a library search group"), NULL);
ee1fe73e 1238
b0193076
RÁE		 1239
1240 DEFINE_special(start_lib, options::TWO_DASHES, '\0',
1241 N_("Start a library"), NULL);
1242 DEFINE_special(end_lib, options::TWO_DASHES, '\0',
1243 N_("End a library "), NULL);
1244
4f46f626
L		 1245 DEFINE_string(fuse_ld, options::ONE_DASH, '\0', "",
1246 N_("Ignored for GCC linker option compatibility"),
1247 "");
1248
fee2edb1 1249 // The -z options.
ee1fe73e 1250
d98bc257
ILT		 1251 DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
1252 N_("Sort dynamic relocs"),
1253 N_("Do not sort dynamic relocs"));
fee2edb1
ILT		 1254 DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
1255 N_("Set common page size to SIZE"), N_("SIZE"));
eb42429a
ILT		 1256 DEFINE_bool(defs, options::DASH_Z, '\0', false,
1257 N_("Report undefined symbols (even with --shared)"),
1258 NULL);
ee1fe73e 1259 DEFINE_bool(execstack, options::DASH_Z, '\0', false,
a4d4b13f 1260 N_("Mark output as requiring executable stack"), NULL);
7c414435
DM		 1261 DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
1262 N_("Mark DSO to be initialized first at runtime"),
1263 NULL);
1264 DEFINE_bool(interpose, options::DASH_Z, '\0', false,
1265 N_("Mark object to interpose all DSOs but executable"),
1266 NULL);
6a9da32a
CC		 1267 DEFINE_bool_alias(lazy, now, options::DASH_Z, '\0',
1268 N_("Mark object for lazy runtime binding (default)"),
1269 NULL, true);
7c414435
DM		 1270 DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
1271 N_("Mark object requiring immediate process"),
1272 NULL);
e1c74d60
ILT		 1273 DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
1274 N_("Set maximum page size to SIZE"), N_("SIZE"));
30bc8c46
ILT		 1275 DEFINE_bool(muldefs, options::DASH_Z, '\0', false,
1276 N_("Allow multiple definitions of symbols"),
1277 NULL);
1278 // copyreloc is here in the list because there is only -z
1279 // nocopyreloc, not -z copyreloc.
966d4097
DK		 1280 DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
1281 NULL,
1282 N_("Do not create copy relocs"));
7c414435
DM		 1283 DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
1284 N_("Mark object not to use default search paths"),
1285 NULL);
1286 DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
1287 N_("Mark DSO non-deletable at runtime"),
1288 NULL);
1289 DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
1290 N_("Mark DSO not available to dlopen"),
1291 NULL);
1292 DEFINE_bool(nodump, options::DASH_Z, '\0', false,
1293 N_("Mark DSO not available to dldump"),
1294 NULL);
e1c74d60
ILT		 1295 DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
1296 N_("Mark output as not requiring executable stack"), NULL);
1297 DEFINE_bool(now, options::DASH_Z, '\0', false,
1298 N_("Mark object for immediate function binding"),
1299 NULL);
7be8330a
CD		 1300 DEFINE_bool(origin, options::DASH_Z, '\0', false,
1301 N_("Mark DSO to indicate that needs immediate $ORIGIN "
1302 "processing at runtime"), NULL);
e1c74d60
ILT		 1303 DEFINE_bool(relro, options::DASH_Z, '\0', false,
1304 N_("Where possible mark variables read-only after relocation"),
1305 N_("Don't mark variables read-only after relocation"));
ffeef7df
ILT		 1306 DEFINE_bool(text, options::DASH_Z, '\0', false,
1307 N_("Do not permit relocations in read-only segments"),
611062c0 1308 N_("Permit relocations in read-only segments (default)"));
ffeef7df
ILT		 1309 DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0',
1310 N_("Permit relocations in read-only segments (default)"),
1311 NULL, true);
bae7f79e 1312
ee1fe73e
ILT		 1313 public:
1314 typedef options::Dir_list Dir_list;
ca3a67a5 1315
ee1fe73e 1316 General_options();
61ba1cf9 1317
ee1fe73e
ILT		 1318 // Does post-processing on flags, making sure they all have
1319 // non-conflicting values. Also converts some flags from their
1320 // "standard" types (string, etc), to another type (enum, DirList),
1321 // which can be accessed via a separate method. Dies if it notices
1322 // any problems.
1323 void finalize();
516cb3d0 1324
459c9f1c
ILT		 1325 // True if we printed the version information.
1326 bool
1327 printed_version() const
1328 { return this->printed_version_; }
1329
ee1fe73e
ILT		 1330 // The macro defines output() (based on --output), but that's a
1331 // generic name. Provide this alternative name, which is clearer.
8851ecca 1332 const char*
ee1fe73e
ILT		 1333 output_file_name() const
1334 { return this->output(); }
92e059d8 1335
8851ecca
ILT		 1336 // This is not defined via a flag, but combines flags to say whether
1337 // the output is position-independent or not.
1338 bool
1339 output_is_position_independent() const
374ad285 1340 { return this->shared() || this->pie(); }
8851ecca 1341
183fd0e3
AO		 1342 // Return true if the output is something that can be exec()ed, such
1343 // as a static executable, or a position-dependent or
1344 // position-independent executable, but not a dynamic library or an
1345 // object file.
1346 bool
1347 output_is_executable() const
374ad285 1348 { return !this->shared() && !this->relocatable(); }
183fd0e3 1349
ee1fe73e
ILT		 1350 // This would normally be static(), and defined automatically, but
1351 // since static is a keyword, we need to come up with our own name.
bae7f79e
ILT		 1352 bool
1353 is_static() const
ee1fe73e 1354 { return static_; }
756ac4a8 1355
ee1fe73e
ILT		 1356 // In addition to getting the input and output formats as a string
1357 // (via format() and oformat()), we also give access as an enum.
1358 enum Object_format
1359 {
1360 // Ordinary ELF.
1361 OBJECT_FORMAT_ELF,
1362 // Straight binary format.
1363 OBJECT_FORMAT_BINARY
1364 };
fe9a4c12 1365
e6a307ba
ILT		 1366 // Convert a string to an Object_format. Gives an error if the
1367 // string is not recognized.
1368 static Object_format
1369 string_to_object_format(const char* arg);
1370
ee1fe73e
ILT		 1371 // Note: these functions are not very fast.
1372 Object_format format_enum() const;
1373 Object_format oformat_enum() const;
fe9a4c12 1374
fd9d194f
ILT		 1375 // Return whether FILENAME is in a system directory.
1376 bool
1377 is_in_system_directory(const std::string& name) const;
1378
8c604651
CS		 1379 // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
1380 bool
1381 should_retain_symbol(const char* symbol_name) const
1382 {
1383 if (symbols_to_retain_.empty()) // means flag wasn't specified
1384 return true;
1385 return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
1386 }
1387
ee1fe73e
ILT		 1388 // These are the best way to get access to the execstack state,
1389 // not execstack() and noexecstack() which are hard to use properly.
35cdfc9a
ILT		 1390 bool
1391 is_execstack_set() const
ee1fe73e 1392 { return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
35cdfc9a
ILT		 1393
1394 bool
1395 is_stack_executable() const
ee1fe73e 1396 { return this->execstack_status_ == EXECSTACK_YES; }
c7912668 1397
032ce4e9
ST		 1398 bool
1399 icf_enabled() const
1400 { return this->icf_status_ != ICF_NONE; }
1401
1402 bool
1403 icf_safe_folding() const
1404 { return this->icf_status_ == ICF_SAFE; }
1405
086a1841
ILT		 1406 // The --demangle option takes an optional string, and there is also
1407 // a --no-demangle option. This is the best way to decide whether
1408 // to demangle or not.
1409 bool
1410 do_demangle() const
1411 { return this->do_demangle_; }
1412
89fc3421
CC		 1413 // Returns TRUE if any plugin libraries have been loaded.
1414 bool
1415 has_plugins() const
1416 { return this->plugins_ != NULL; }
1417
1418 // Return a pointer to the plugin manager.
1419 Plugin_manager*
1420 plugins() const
1421 { return this->plugins_; }
1422
c82fbeee
CS		 1423 // True iff SYMBOL was found in the file specified by dynamic-list.
1424 bool
1425 in_dynamic_list(const char* symbol) const
1426 { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
1427
6affe781
ILT		 1428 // Finalize the dynamic list.
1429 void
1430 finalize_dynamic_list()
1431 { this->dynamic_list_.version_script_info()->finalize(); }
1432
8c21d9d3
CC		 1433 // The mode selected by the --incremental options.
1434 enum Incremental_mode
1435 {
1436 // No incremental linking (--no-incremental).
1437 INCREMENTAL_OFF,
1438 // Incremental update only (--incremental-update).
1439 INCREMENTAL_UPDATE,
1440 // Force a full link, but prepare for subsequent incremental link
1441 // (--incremental-full).
1442 INCREMENTAL_FULL,
1443 // Incremental update if possible, fallback to full link (--incremental).
1444 INCREMENTAL_AUTO
1445 };
1446
1447 // The incremental linking mode.
1448 Incremental_mode
1449 incremental_mode() const
1450 { return this->incremental_mode_; }
1451
266d0a74
ILT		 1452 // The disposition given by the --incremental-changed,
1453 // --incremental-unchanged or --incremental-unknown option. The
1454 // value may change as we proceed parsing the command line flags.
1455 Incremental_disposition
1456 incremental_disposition() const
1457 { return this->incremental_disposition_; }
1458
221597a5
CC		 1459 // The disposition to use for startup files (those that precede the
1460 // first --incremental-changed, etc. option).
1461 Incremental_disposition
1462 incremental_startup_disposition() const
1463 { return this->incremental_startup_disposition_; }
1464
65514900
CC		 1465 // Return true if S is the name of a library excluded from automatic
1466 // symbol export.
1467 bool
ca09d69a 1468 check_excluded_libs(const std::string &s) const;
65514900 1469
a192ba05
ILT		 1470 // If an explicit start address was given for section SECNAME with
1471 // the --section-start option, return true and set *PADDR to the
1472 // address. Otherwise return false.
1473 bool
1474 section_start(const char* secname, uint64_t* paddr) const;
1475
ea0d8c47
ILT		 1476 // Return whether any --section-start option was used.
1477 bool
1478 any_section_start() const
1479 { return !this->section_starts_.empty(); }
1480
9b2fd367
DK		 1481 enum Fix_v4bx
1482 {
1483 // Leave original instruction.
1484 FIX_V4BX_NONE,
1485 // Replace instruction.
1486 FIX_V4BX_REPLACE,
1487 // Generate an interworking veneer.
1488 FIX_V4BX_INTERWORKING
1489 };
1490
1491 Fix_v4bx
1492 fix_v4bx() const
1493 { return (this->fix_v4bx_); }
1494
7296d933
DK		 1495 enum Endianness
1496 {
1497 ENDIANNESS_NOT_SET,
1498 ENDIANNESS_BIG,
1499 ENDIANNESS_LITTLE
1500 };
1501
1502 Endianness
1503 endianness() const
1504 { return this->endianness_; }
1505
bae7f79e 1506 private:
dbe717ef
ILT		 1507 // Don't copy this structure.
1508 General_options(const General_options&);
1509 General_options& operator=(const General_options&);
1510
35cdfc9a
ILT		 1511 // Whether to mark the stack as executable.
1512 enum Execstack
1513 {
1514 // Not set on command line.
1515 EXECSTACK_FROM_INPUT,
ee1fe73e 1516 // Mark the stack as executable (-z execstack).
35cdfc9a 1517 EXECSTACK_YES,
ee1fe73e 1518 // Mark the stack as not executable (-z noexecstack).
35cdfc9a
ILT		 1519 EXECSTACK_NO
1520 };
1521
032ce4e9
ST		 1522 enum Icf_status
1523 {
1524 // Do not fold any functions (Default or --icf=none).
1525 ICF_NONE,
1526 // All functions are candidates for folding. (--icf=all).
1527 ICF_ALL,
1528 // Only ctors and dtors are candidates for folding. (--icf=safe).
1529 ICF_SAFE
1530 };
1531
1532 void
1533 set_icf_status(Icf_status value)
1534 { this->icf_status_ = value; }
1535
92e059d8 1536 void
ee1fe73e 1537 set_execstack_status(Execstack value)
086a1841
ILT		 1538 { this->execstack_status_ = value; }
1539
1540 void
1541 set_do_demangle(bool value)
1542 { this->do_demangle_ = value; }
92e059d8 1543
bae7f79e 1544 void
45aa233b 1545 set_static(bool value)
ee1fe73e 1546 { static_ = value; }
652ec9bd 1547
ee1fe73e 1548 // These are called by finalize() to set up the search-path correctly.
35cdfc9a 1549 void
3f3cddf1 1550 add_to_library_path_with_sysroot(const std::string& arg)
ee1fe73e 1551 { this->add_search_directory_to_library_path(Search_directory(arg, true)); }
c7912668 1552
ad2d6943
ILT		 1553 // Apply any sysroot to the directory lists.
1554 void
1555 add_sysroot();
086a1841 1556
89fc3421
CC		 1557 // Add a plugin and its arguments to the list of plugins.
1558 void
ca09d69a 1559 add_plugin(const char* filename);
4674ecfc
CC		 1560
1561 // Add a plugin option.
1562 void
1563 add_plugin_option(const char* opt);
89fc3421 1564
459c9f1c
ILT		 1565 // Whether we printed version information.
1566 bool printed_version_;
086a1841
ILT		 1567 // Whether to mark the stack as executable.
1568 Execstack execstack_status_;
032ce4e9
ST		 1569 // Whether to do code folding.
1570 Icf_status icf_status_;
086a1841
ILT		 1571 // Whether to do a static link.
1572 bool static_;
1573 // Whether to do demangling.
1574 bool do_demangle_;
89fc3421
CC		 1575 // List of plugin libraries.
1576 Plugin_manager* plugins_;
c82fbeee
CS		 1577 // The parsed output of --dynamic-list files. For convenience in
1578 // script.cc, we store this as a Script_options object, even though
1579 // we only use a single Version_tree from it.
1580 Script_options dynamic_list_;
8c21d9d3
CC		 1581 // The incremental linking mode.
1582 Incremental_mode incremental_mode_;
266d0a74
ILT		 1583 // The disposition given by the --incremental-changed,
1584 // --incremental-unchanged or --incremental-unknown option. The
1585 // value may change as we proceed parsing the command line flags.
1586 Incremental_disposition incremental_disposition_;
221597a5
CC		 1587 // The disposition to use for startup files (those marked
1588 // INCREMENTAL_STARTUP).
1589 Incremental_disposition incremental_startup_disposition_;
459c9f1c 1590 // Whether we have seen one of the options that require incremental
221597a5
CC		 1591 // build (--incremental-changed, --incremental-unchanged,
1592 // --incremental-unknown, or --incremental-startup-unchanged).
266d0a74 1593 bool implicit_incremental_;
8c604651 1594 // Libraries excluded from automatic export, via --exclude-libs.
65514900 1595 Unordered_set<std::string> excluded_libs_;
8c604651
CS		 1596 // List of symbol-names to keep, via -retain-symbol-info.
1597 Unordered_set<std::string> symbols_to_retain_;
a192ba05
ILT		 1598 // Map from section name to address from --section-start.
1599 std::map<std::string, uint64_t> section_starts_;
9b2fd367
DK		 1600 // Whether to process armv4 bx instruction relocation.
1601 Fix_v4bx fix_v4bx_;
7296d933
DK		 1602 // Endianness.
1603 Endianness endianness_;
bae7f79e
ILT		 1604};
1605
ee1fe73e
ILT		 1606// The position-dependent options. We use this to store the state of
1607// the commandline at a particular point in parsing for later
1608// reference. For instance, if we see "ld --whole-archive foo.a
1609// --no-whole-archive," we want to store the whole-archive option with
1610// foo.a, so when the time comes to parse foo.a we know we should do
1611// it in whole-archive mode. We could store all of General_options,
1612// but that's big, so we just pick the subset of flags that actually
1613// change in a position-dependent way.
1614
1615#define DEFINE_posdep(varname__, type__) \
1616 public: \
1617 type__ \
1618 varname__() const \
1619 { return this->varname__##_; } \
1620 \
1621 void \
1622 set_##varname__(type__ value) \
1623 { this->varname__##_ = value; } \
1624 private: \
1625 type__ varname__##_
bae7f79e
ILT		 1626
1627class Position_dependent_options
1628{
1629 public:
ee1fe73e
ILT		 1630 Position_dependent_options(const General_options& options
1631 = Position_dependent_options::default_options_)
1632 { copy_from_options(options); }
bae7f79e 1633
ee1fe73e
ILT		 1634 void copy_from_options(const General_options& options)
1635 {
1636 this->set_as_needed(options.as_needed());
1637 this->set_Bdynamic(options.Bdynamic());
1638 this->set_format_enum(options.format_enum());
1639 this->set_whole_archive(options.whole_archive());
266d0a74 1640 this->set_incremental_disposition(options.incremental_disposition());
ee1fe73e 1641 }
bc644c6c 1642
ee1fe73e
ILT		 1643 DEFINE_posdep(as_needed, bool);
1644 DEFINE_posdep(Bdynamic, bool);
1645 DEFINE_posdep(format_enum, General_options::Object_format);
1646 DEFINE_posdep(whole_archive, bool);
266d0a74 1647 DEFINE_posdep(incremental_disposition, Incremental_disposition);
7cc619c3 1648
dbe717ef 1649 private:
ee1fe73e
ILT		 1650 // This is a General_options with everything set to its default
1651 // value. A Position_dependent_options created with no argument
1652 // will take its values from here.
1653 static General_options default_options_;
bae7f79e
ILT		 1654};
1655
ee1fe73e 1656
bae7f79e
ILT		 1657// A single file or library argument from the command line.
1658
ead1e424 1659class Input_file_argument
bae7f79e
ILT		 1660{
1661 public:
ae3b5189
CD		 1662 enum Input_file_type
1663 {
1664 // A regular file, name used as-is, not searched.
1665 INPUT_FILE_TYPE_FILE,
1666 // A library name. When used, "lib" will be prepended and ".so" or
1667 // ".a" appended to make a filename, and that filename will be searched
1668 // for using the -L paths.
1669 INPUT_FILE_TYPE_LIBRARY,
1670 // A regular file, name used as-is, but searched using the -L paths.
1671 INPUT_FILE_TYPE_SEARCHED_FILE
1672 };
1673
51dee2fe 1674 // name: file name or library name
ae3b5189 1675 // type: the type of this input file.
51dee2fe
ILT		 1676 // extra_search_path: an extra directory to look for the file, prior
1677 // to checking the normal library search path. If this is "",
1678 // then no extra directory is added.
88dd47ac 1679 // just_symbols: whether this file only defines symbols.
51dee2fe 1680 // options: The position dependent options at this point in the
ad2d6943 1681 // command line, such as --whole-archive.
ead1e424 1682 Input_file_argument()
ae3b5189 1683 : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
cdc29364 1684 just_symbols_(false), options_(), arg_serial_(0)
ead1e424
ILT		 1685 { }
1686
2ea97941
ILT		 1687 Input_file_argument(const char* name, Input_file_type type,
1688 const char* extra_search_path,
1689 bool just_symbols,
1690 const Position_dependent_options& options)
1691 : name_(name), type_(type), extra_search_path_(extra_search_path),
cdc29364 1692 just_symbols_(just_symbols), options_(options), arg_serial_(0)
ee1fe73e
ILT		 1693 { }
1694
1695 // You can also pass in a General_options instance instead of a
1696 // Position_dependent_options. In that case, we extract the
1697 // position-independent vars from the General_options and only store
1698 // those.
2ea97941
ILT		 1699 Input_file_argument(const char* name, Input_file_type type,
1700 const char* extra_search_path,
1701 bool just_symbols,
1702 const General_options& options)
1703 : name_(name), type_(type), extra_search_path_(extra_search_path),
cdc29364 1704 just_symbols_(just_symbols), options_(options), arg_serial_(0)
bae7f79e
ILT		 1705 { }
1706
1707 const char*
1708 name() const
dbe717ef 1709 { return this->name_.c_str(); }
bae7f79e
ILT		 1710
1711 const Position_dependent_options&
1712 options() const
1713 { return this->options_; }
1714
1715 bool
1716 is_lib() const
ae3b5189
CD		 1717 { return type_ == INPUT_FILE_TYPE_LIBRARY; }
1718
1719 bool
1720 is_searched_file() const
1721 { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
bae7f79e 1722
51dee2fe
ILT		 1723 const char*
1724 extra_search_path() const
1725 {
1726 return (this->extra_search_path_.empty()
1727 ? NULL
ee1fe73e 1728 : this->extra_search_path_.c_str());
51dee2fe
ILT		 1729 }
1730
88dd47ac
ILT		 1731 // Return whether we should only read symbols from this file.
1732 bool
1733 just_symbols() const
1734 { return this->just_symbols_; }
1735
51dee2fe
ILT		 1736 // Return whether this file may require a search using the -L
1737 // options.
1738 bool
1739 may_need_search() const
ae3b5189
CD		 1740 {
1741 return (this->is_lib()
1742 || this->is_searched_file()
1743 || !this->extra_search_path_.empty());
1744 }
51dee2fe 1745
cdc29364
CC		 1746 // Set the serial number for this argument.
1747 void
1748 set_arg_serial(unsigned int arg_serial)
1749 { this->arg_serial_ = arg_serial; }
1750
1751 // Get the serial number.
1752 unsigned int
1753 arg_serial() const
1754 { return this->arg_serial_; }
1755
bae7f79e 1756 private:
dbe717ef
ILT		 1757 // We use std::string, not const char*, here for convenience when
1758 // using script files, so that we do not have to preserve the string
1759 // in that case.
1760 std::string name_;
ae3b5189 1761 Input_file_type type_;
51dee2fe 1762 std::string extra_search_path_;
88dd47ac 1763 bool just_symbols_;
bae7f79e 1764 Position_dependent_options options_;
cdc29364
CC		 1765 // A unique index for this file argument in the argument list.
1766 unsigned int arg_serial_;
bae7f79e
ILT		 1767};
1768
ead1e424
ILT		 1769// A file or library, or a group, from the command line.
1770
1771class Input_argument
1772{
1773 public:
1774 // Create a file or library argument.
2ea97941 1775 explicit Input_argument(Input_file_argument file)
c7975edd 1776 : is_file_(true), file_(file), group_(NULL), lib_(NULL), script_info_(NULL)
ead1e424
ILT		 1777 { }
1778
1779 // Create a group argument.
2ea97941 1780 explicit Input_argument(Input_file_group* group)
c7975edd 1781 : is_file_(false), group_(group), lib_(NULL), script_info_(NULL)
b0193076
RÁE		 1782 { }
1783
1784 // Create a lib argument.
1785 explicit Input_argument(Input_file_lib* lib)
c7975edd 1786 : is_file_(false), group_(NULL), lib_(lib), script_info_(NULL)
ead1e424
ILT		 1787 { }
1788
1789 // Return whether this is a file.
1790 bool
1791 is_file() const
1792 { return this->is_file_; }
1793
1794 // Return whether this is a group.
1795 bool
1796 is_group() const
b0193076
RÁE		 1797 { return !this->is_file_ && this->lib_ == NULL; }
1798
1799 // Return whether this is a lib.
1800 bool
1801 is_lib() const
1802 { return this->lib_ != NULL; }
ead1e424
ILT		 1803
1804 // Return the information about the file.
1805 const Input_file_argument&
1806 file() const
1807 {
a3ad94ed 1808 gold_assert(this->is_file_);
ead1e424
ILT		 1809 return this->file_;
1810 }
1811
1812 // Return the information about the group.
1813 const Input_file_group*
1814 group() const
1815 {
a3ad94ed 1816 gold_assert(!this->is_file_);
ead1e424
ILT		 1817 return this->group_;
1818 }
1819
1820 Input_file_group*
1821 group()
1822 {
a3ad94ed 1823 gold_assert(!this->is_file_);
ead1e424
ILT		 1824 return this->group_;
1825 }
1826
b0193076
RÁE		 1827 // Return the information about the lib.
1828 const Input_file_lib*
1829 lib() const
1830 {
1831 gold_assert(!this->is_file_);
1832 gold_assert(this->lib_);
1833 return this->lib_;
1834 }
1835
1836 Input_file_lib*
1837 lib()
1838 {
1839 gold_assert(!this->is_file_);
1840 gold_assert(this->lib_);
1841 return this->lib_;
1842 }
1843
c7975edd
CC		 1844 // If a script generated this argument, store a pointer to the script info.
1845 // Currently used only for recording incremental link information.
1846 void
1847 set_script_info(Script_info* info)
1848 { this->script_info_ = info; }
1849
1850 Script_info*
1851 script_info() const
1852 { return this->script_info_; }
1853
ead1e424
ILT		 1854 private:
1855 bool is_file_;
1856 Input_file_argument file_;
1857 Input_file_group* group_;
b0193076 1858 Input_file_lib* lib_;
c7975edd 1859 Script_info* script_info_;
ead1e424
ILT		 1860};
1861
072fe7ce
ILT		 1862typedef std::vector<Input_argument> Input_argument_list;
1863
ead1e424
ILT		 1864// A group from the command line. This is a set of arguments within
1865// --start-group ... --end-group.
1866
1867class Input_file_group
92e059d8 1868{
ead1e424 1869 public:
072fe7ce 1870 typedef Input_argument_list::const_iterator const_iterator;
ead1e424
ILT		 1871
1872 Input_file_group()
1873 : files_()
1874 { }
1875
1876 // Add a file to the end of the group.
c7975edd 1877 Input_argument&
ead1e424 1878 add_file(const Input_file_argument& arg)
c7975edd
CC		 1879 {
1880 this->files_.push_back(Input_argument(arg));
1881 return this->files_.back();
1882 }
ead1e424
ILT		 1883
1884 // Iterators to iterate over the group contents.
1885
1886 const_iterator
1887 begin() const
1888 { return this->files_.begin(); }
1889
1890 const_iterator
1891 end() const
1892 { return this->files_.end(); }
1893
1894 private:
072fe7ce 1895 Input_argument_list files_;
92e059d8
ILT		 1896};
1897
b0193076
RÁE		 1898// A lib from the command line. This is a set of arguments within
1899// --start-lib ... --end-lib.
1900
1901class Input_file_lib
1902{
1903 public:
1904 typedef Input_argument_list::const_iterator const_iterator;
1905
1906 Input_file_lib(const Position_dependent_options& options)
1907 : files_(), options_(options)
1908 { }
1909
1910 // Add a file to the end of the lib.
c7975edd 1911 Input_argument&
b0193076 1912 add_file(const Input_file_argument& arg)
c7975edd
CC		 1913 {
1914 this->files_.push_back(Input_argument(arg));
1915 return this->files_.back();
1916 }
b0193076
RÁE		 1917
1918 const Position_dependent_options&
1919 options() const
1920 { return this->options_; }
1921
1922 // Iterators to iterate over the lib contents.
1923
1924 const_iterator
1925 begin() const
1926 { return this->files_.begin(); }
1927
1928 const_iterator
1929 end() const
1930 { return this->files_.end(); }
1931
1932 size_t
1933 size() const
1934 { return this->files_.size(); }
1935
1936 private:
1937 Input_argument_list files_;
1938 Position_dependent_options options_;
1939};
1940
dbe717ef
ILT		 1941// A list of files from the command line or a script.
1942
1943class Input_arguments
1944{
1945 public:
dbe717ef
ILT		 1946 typedef Input_argument_list::const_iterator const_iterator;
1947
1948 Input_arguments()
cdc29364 1949 : input_argument_list_(), in_group_(false), in_lib_(false), file_count_(0)
dbe717ef
ILT		 1950 { }
1951
1952 // Add a file.
c7975edd 1953 Input_argument&
cdc29364 1954 add_file(Input_file_argument& arg);
dbe717ef
ILT		 1955
1956 // Start a group (the --start-group option).
1957 void
1958 start_group();
1959
1960 // End a group (the --end-group option).
1961 void
1962 end_group();
1963
b0193076
RÁE		 1964 // Start a lib (the --start-lib option).
1965 void
1966 start_lib(const Position_dependent_options&);
1967
1968 // End a lib (the --end-lib option).
1969 void
1970 end_lib();
1971
dbe717ef
ILT		 1972 // Return whether we are currently in a group.
1973 bool
1974 in_group() const
1975 { return this->in_group_; }
1976
b0193076
RÁE		 1977 // Return whether we are currently in a lib.
1978 bool
1979 in_lib() const
1980 { return this->in_lib_; }
1981
fe9a4c12
ILT		 1982 // The number of entries in the list.
1983 int
1984 size() const
1985 { return this->input_argument_list_.size(); }
1986
dbe717ef
ILT		 1987 // Iterators to iterate over the list of input files.
1988
1989 const_iterator
1990 begin() const
1991 { return this->input_argument_list_.begin(); }
1992
1993 const_iterator
1994 end() const
1995 { return this->input_argument_list_.end(); }
1996
1997 // Return whether the list is empty.
1998 bool
1999 empty() const
2000 { return this->input_argument_list_.empty(); }
2001
cdc29364
CC		 2002 // Return the number of input files. This may be larger than
2003 // input_argument_list_.size(), because of files that are part
2004 // of groups or libs.
2005 int
2006 number_of_input_files() const
2007 { return this->file_count_; }
2008
dbe717ef
ILT		 2009 private:
2010 Input_argument_list input_argument_list_;
2011 bool in_group_;
b0193076 2012 bool in_lib_;
cdc29364 2013 unsigned int file_count_;
dbe717ef
ILT		 2014};
2015
ee1fe73e
ILT		 2016
2017// All the information read from the command line. These are held in
2018// three separate structs: one to hold the options (--foo), one to
2019// hold the filenames listed on the commandline, and one to hold
2020// linker script information. This third is not a subset of the other
2021// two because linker scripts can be specified either as options (via
2022// -T) or as a file.
bae7f79e
ILT		 2023
2024class Command_line
2025{
2026 public:
ead1e424
ILT		 2027 typedef Input_arguments::const_iterator const_iterator;
2028
a5dc0706 2029 Command_line();
bae7f79e
ILT		 2030
2031 // Process the command line options. This will exit with an
2032 // appropriate error message if an unrecognized option is seen.
2033 void
ee1fe73e 2034 process(int argc, const char** argv);
bae7f79e 2035
a0451b38 2036 // Process one command-line option. This takes the index of argv to
ee1fe73e
ILT		 2037 // process, and returns the index for the next option. no_more_options
2038 // is set to true if argv[i] is "--".
61ba1cf9 2039 int
ee1fe73e
ILT		 2040 process_one_option(int argc, const char** argv, int i,
2041 bool* no_more_options);
3c2fafa5 2042
61ba1cf9 2043 // Get the general options.
bae7f79e
ILT		 2044 const General_options&
2045 options() const
2046 { return this->options_; }
2047
3c2fafa5
ILT		 2048 // Get the position dependent options.
2049 const Position_dependent_options&
2050 position_dependent_options() const
2051 { return this->position_options_; }
2052
a5dc0706
ILT		 2053 // Get the linker-script options.
2054 Script_options&
e5756efb 2055 script_options()
a5dc0706 2056 { return this->script_options_; }
e5756efb 2057
6affe781 2058 // Finalize the version-script options and return them.
a5dc0706 2059 const Version_script_info&
6affe781 2060 version_script();
e5756efb 2061
ee1fe73e
ILT		 2062 // Get the input files.
2063 Input_arguments&
2064 inputs()
2065 { return this->inputs_; }
2066
fe9a4c12
ILT		 2067 // The number of input files.
2068 int
2069 number_of_input_files() const
cdc29364 2070 { return this->inputs_.number_of_input_files(); }
fe9a4c12 2071
ead1e424
ILT		 2072 // Iterators to iterate over the list of input files.
2073
2074 const_iterator
2075 begin() const
2076 { return this->inputs_.begin(); }
2077
2078 const_iterator
2079 end() const
2080 { return this->inputs_.end(); }
bae7f79e
ILT		 2081
2082 private:
ead1e424
ILT		 2083 Command_line(const Command_line&);
2084 Command_line& operator=(const Command_line&);
2085
293c1386
CC		 2086 // This is a dummy class to provide a constructor that runs before
2087 // the constructor for the General_options. The Pre_options constructor
2088 // is used as a hook to set the flag enabling the options to register
2089 // themselves.
2090 struct Pre_options {
2091 Pre_options();
2092 };
2093
2094 // This must come before options_!
2095 Pre_options pre_options_;
bae7f79e
ILT		 2096 General_options options_;
2097 Position_dependent_options position_options_;
a5dc0706 2098 Script_options script_options_;
ead1e424 2099 Input_arguments inputs_;
bae7f79e
ILT		 2100};
2101
2102} // End namespace gold.
2103
2104#endif // !defined(GOLD_OPTIONS_H)
GDB Binutils - Deliverables
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