1 // options.c -- handle command line options for gold
3 // Copyright (C) 2006-2015 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.
32 #include "filenames.h"
33 #include "libiberty.h"
35 #include "../bfd/bfdver.h"
39 #include "target-select.h"
47 Position_dependent_options::default_options_
;
52 // This flag is TRUE if we should register the command-line options as they
53 // are constructed. It is set after construction of the options within
54 // class Position_dependent_options.
55 static bool ready_to_register
= false;
57 // This global variable is set up as General_options is constructed.
58 static std::vector
<const One_option
*> registered_options
;
60 // These are set up at the same time -- the variables that accept one
61 // dash, two, or require -z. A single variable may be in more than
62 // one of these data structures.
63 typedef Unordered_map
<std::string
, One_option
*> Option_map
;
64 static Option_map
* long_options
= NULL
;
65 static One_option
* short_options
[128];
68 One_option::register_option()
70 if (!ready_to_register
)
73 registered_options
.push_back(this);
75 // We can't make long_options a static Option_map because we can't
76 // guarantee that will be initialized before register_option() is
78 if (long_options
== NULL
)
79 long_options
= new Option_map
;
81 // TWO_DASHES means that two dashes are preferred, but one is ok too.
82 if (!this->longname
.empty())
83 (*long_options
)[this->longname
] = this;
85 const int shortname_as_int
= static_cast<int>(this->shortname
);
86 gold_assert(shortname_as_int
>= 0 && shortname_as_int
< 128);
87 if (this->shortname
!= '\0')
89 gold_assert(short_options
[shortname_as_int
] == NULL
);
90 short_options
[shortname_as_int
] = this;
95 One_option::print() const
100 if (this->shortname
!= '\0')
102 len
+= printf("-%c", this->shortname
);
105 // -z takes long-names only.
106 gold_assert(this->dashes
!= DASH_Z
);
107 len
+= printf(" %s", gettext(this->helparg
));
111 if (!this->longname
.empty()
112 && !(this->longname
[0] == this->shortname
113 && this->longname
[1] == '\0'))
117 switch (this->dashes
)
119 case options::ONE_DASH
: case options::EXACTLY_ONE_DASH
:
122 case options::TWO_DASHES
: case options::EXACTLY_TWO_DASHES
:
125 case options::DASH_Z
:
126 len
+= printf("-z ");
131 len
+= printf("%s", this->longname
.c_str());
134 // For most options, we print "--frob FOO". But for -z
135 // we print "-z frob=FOO".
136 len
+= printf("%c%s", this->dashes
== options::DASH_Z
? '=' : ' ',
137 gettext(this->helparg
));
146 for (; len
< 30; ++len
)
149 // TODO: if we're boolean, add " (default)" when appropriate.
150 printf("%s\n", gettext(this->helpstring
));
156 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name
);
158 std::vector
<const One_option
*>::const_iterator it
;
159 for (it
= registered_options
.begin(); it
!= registered_options
.end(); ++it
)
162 // config.guess and libtool.m4 look in ld --help output for the
163 // string "supported targets".
164 printf(_("%s: supported targets:"), gold::program_name
);
165 std::vector
<const char*> supported_names
;
166 gold::supported_target_names(&supported_names
);
167 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
168 p
!= supported_names
.end();
173 printf(_("%s: supported emulations:"), gold::program_name
);
174 supported_names
.clear();
175 gold::supported_emulation_names(&supported_names
);
176 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
177 p
!= supported_names
.end();
182 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
183 const char* report
= REPORT_BUGS_TO
;
185 printf(_("Report bugs to %s\n"), report
);
188 // For bool, arg will be NULL (boolean options take no argument);
189 // we always just set to true.
191 parse_bool(const char*, const char*, bool* retval
)
197 parse_uint(const char* option_name
, const char* arg
, int* retval
)
200 *retval
= strtol(arg
, &endptr
, 0);
201 if (*endptr
!= '\0' || *retval
< 0)
202 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
207 parse_int(const char* option_name
, const char* arg
, int* retval
)
210 *retval
= strtol(arg
, &endptr
, 0);
212 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
217 parse_uint64(const char* option_name
, const char* arg
, uint64_t* retval
)
220 *retval
= strtoull(arg
, &endptr
, 0);
222 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
227 parse_double(const char* option_name
, const char* arg
, double* retval
)
230 *retval
= strtod(arg
, &endptr
);
232 gold_fatal(_("%s: invalid option value "
233 "(expected a floating point number): %s"),
238 parse_percent(const char* option_name
, const char* arg
, double* retval
)
241 *retval
= strtod(arg
, &endptr
) / 100.0;
243 gold_fatal(_("%s: invalid option value "
244 "(expected a floating point number): %s"),
249 parse_string(const char* option_name
, const char* arg
, const char** retval
)
252 gold_fatal(_("%s: must take a non-empty argument"), option_name
);
257 parse_optional_string(const char*, const char* arg
, const char** retval
)
263 parse_dirlist(const char*, const char* arg
, Dir_list
* retval
)
265 retval
->push_back(Search_directory(arg
, false));
269 parse_set(const char*, const char* arg
, String_set
* retval
)
271 retval
->insert(std::string(arg
));
275 parse_choices(const char* option_name
, const char* arg
, const char** retval
,
276 const char* choices
[], int num_choices
)
278 for (int i
= 0; i
< num_choices
; i
++)
279 if (strcmp(choices
[i
], arg
) == 0)
285 // If we get here, the user did not enter a valid choice, so we die.
286 std::string choices_list
;
287 for (int i
= 0; i
< num_choices
; i
++)
289 choices_list
+= choices
[i
];
290 if (i
!= num_choices
- 1)
291 choices_list
+= ", ";
293 gold_fatal(_("%s: must take one of the following arguments: %s"),
294 option_name
, choices_list
.c_str());
297 } // End namespace options.
299 // Define the handler for "special" options (set via DEFINE_special).
302 General_options::parse_help(const char*, const char*, Command_line
*)
305 ::exit(EXIT_SUCCESS
);
309 General_options::parse_version(const char* opt
, const char*, Command_line
*)
311 bool print_short
= (opt
[0] == '-' && opt
[1] == 'v');
312 gold::print_version(print_short
);
313 this->printed_version_
= true;
315 ::exit(EXIT_SUCCESS
);
319 General_options::parse_V(const char*, const char*, Command_line
*)
321 gold::print_version(true);
322 this->printed_version_
= true;
324 printf(_(" Supported targets:\n"));
325 std::vector
<const char*> supported_names
;
326 gold::supported_target_names(&supported_names
);
327 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
328 p
!= supported_names
.end();
332 printf(_(" Supported emulations:\n"));
333 supported_names
.clear();
334 gold::supported_emulation_names(&supported_names
);
335 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
336 p
!= supported_names
.end();
342 General_options::parse_defsym(const char*, const char* arg
,
343 Command_line
* cmdline
)
345 cmdline
->script_options().define_symbol(arg
);
349 General_options::parse_discard_all(const char*, const char*,
352 this->discard_locals_
= DISCARD_ALL
;
356 General_options::parse_discard_locals(const char*, const char*,
359 this->discard_locals_
= DISCARD_LOCALS
;
363 General_options::parse_discard_none(const char*, const char*,
366 this->discard_locals_
= DISCARD_NONE
;
370 General_options::parse_incremental(const char*, const char*,
373 this->incremental_mode_
= INCREMENTAL_AUTO
;
377 General_options::parse_no_incremental(const char*, const char*,
380 this->incremental_mode_
= INCREMENTAL_OFF
;
384 General_options::parse_incremental_full(const char*, const char*,
387 this->incremental_mode_
= INCREMENTAL_FULL
;
391 General_options::parse_incremental_update(const char*, const char*,
394 this->incremental_mode_
= INCREMENTAL_UPDATE
;
398 General_options::parse_incremental_changed(const char*, const char*,
401 this->implicit_incremental_
= true;
402 this->incremental_disposition_
= INCREMENTAL_CHANGED
;
406 General_options::parse_incremental_unchanged(const char*, const char*,
409 this->implicit_incremental_
= true;
410 this->incremental_disposition_
= INCREMENTAL_UNCHANGED
;
414 General_options::parse_incremental_unknown(const char*, const char*,
417 this->implicit_incremental_
= true;
418 this->incremental_disposition_
= INCREMENTAL_CHECK
;
422 General_options::parse_incremental_startup_unchanged(const char*, const char*,
425 this->implicit_incremental_
= true;
426 this->incremental_startup_disposition_
= INCREMENTAL_UNCHANGED
;
430 General_options::parse_library(const char*, const char* arg
,
431 Command_line
* cmdline
)
433 Input_file_argument::Input_file_type type
;
437 type
= Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE
;
442 type
= Input_file_argument::INPUT_FILE_TYPE_LIBRARY
;
445 Input_file_argument
file(name
, type
, "", false, *this);
446 cmdline
->inputs().add_file(file
);
449 #ifdef ENABLE_PLUGINS
451 General_options::parse_plugin(const char*, const char* arg
,
454 this->add_plugin(arg
);
457 // Parse --plugin-opt.
460 General_options::parse_plugin_opt(const char*, const char* arg
,
463 this->add_plugin_option(arg
);
465 #endif // ENABLE_PLUGINS
468 General_options::parse_R(const char* option
, const char* arg
,
469 Command_line
* cmdline
)
472 if (::stat(arg
, &s
) != 0 || S_ISDIR(s
.st_mode
))
473 this->add_to_rpath(arg
);
475 this->parse_just_symbols(option
, arg
, cmdline
);
479 General_options::parse_just_symbols(const char*, const char* arg
,
480 Command_line
* cmdline
)
482 Input_file_argument
file(arg
, Input_file_argument::INPUT_FILE_TYPE_FILE
,
484 cmdline
->inputs().add_file(file
);
487 // Handle --section-start.
490 General_options::parse_section_start(const char*, const char* arg
,
493 const char* eq
= strchr(arg
, '=');
496 gold_error(_("invalid argument to --section-start; "
497 "must be SECTION=ADDRESS"));
501 std::string
section_name(arg
, eq
- arg
);
504 const char* val_start
= eq
;
505 if (eq
[0] == '0' && (eq
[1] == 'x' || eq
[1] == 'X'))
509 gold_error(_("--section-start address missing"));
514 for (; *eq
!= '\0'; ++eq
)
518 gold_error(_("--section-start argument %s is not a valid hex number"),
523 addr
+= hex_value(*eq
);
526 this->section_starts_
[section_name
] = addr
;
529 // Look up a --section-start value.
532 General_options::section_start(const char* secname
, uint64_t* paddr
) const
534 if (this->section_starts_
.empty())
536 std::map
<std::string
, uint64_t>::const_iterator p
=
537 this->section_starts_
.find(secname
);
538 if (p
== this->section_starts_
.end())
545 General_options::parse_static(const char*, const char*, Command_line
*)
547 this->set_static(true);
551 General_options::parse_script(const char*, const char* arg
,
552 Command_line
* cmdline
)
554 if (!read_commandline_script(arg
, cmdline
))
555 gold::gold_fatal(_("unable to parse script file %s"), arg
);
559 General_options::parse_version_script(const char*, const char* arg
,
560 Command_line
* cmdline
)
562 if (!read_version_script(arg
, cmdline
))
563 gold::gold_fatal(_("unable to parse version script file %s"), arg
);
567 General_options::parse_dynamic_list(const char*, const char* arg
,
568 Command_line
* cmdline
)
570 if (!read_dynamic_list(arg
, cmdline
, &this->dynamic_list_
))
571 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg
);
572 this->have_dynamic_list_
= true;
576 General_options::parse_start_group(const char*, const char*,
577 Command_line
* cmdline
)
579 cmdline
->inputs().start_group();
583 General_options::parse_end_group(const char*, const char*,
584 Command_line
* cmdline
)
586 cmdline
->inputs().end_group();
590 General_options::parse_start_lib(const char*, const char*,
591 Command_line
* cmdline
)
593 cmdline
->inputs().start_lib(cmdline
->position_dependent_options());
597 General_options::parse_end_lib(const char*, const char*,
598 Command_line
* cmdline
)
600 cmdline
->inputs().end_lib();
603 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
604 // of names separated by commas or colons and puts them in a linked list.
605 // We implement the same parsing of names here but store names in an unordered
606 // map to speed up searching of names.
609 General_options::parse_exclude_libs(const char*, const char* arg
,
616 size_t length
= strcspn(p
, ",:");
617 this->excluded_libs_
.insert(std::string(p
, length
));
618 p
+= (p
[length
] ? length
+ 1 : length
);
622 // The checking logic is based on the function check_excluded_libs() in
623 // ld/ldlang.c of GNU ld but our implementation is different because we use
624 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
625 // ld searches sequentially in the excluded libs list. For a given archive,
626 // a match is found if the archive's name matches exactly one of the list
627 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
628 // one of the list entry. An entry "ALL" in the list is considered as a
629 // wild-card and matches any given name.
632 General_options::check_excluded_libs(const std::string
&name
) const
634 Unordered_set
<std::string
>::const_iterator p
;
636 // Exit early for the most common case.
637 if (excluded_libs_
.empty())
640 // If we see "ALL", all archives are excluded from automatic export.
641 p
= excluded_libs_
.find(std::string("ALL"));
642 if (p
!= excluded_libs_
.end())
645 // First strip off any directories in name.
646 const char* basename
= lbasename(name
.c_str());
648 // Try finding an exact match.
649 p
= excluded_libs_
.find(std::string(basename
));
650 if (p
!= excluded_libs_
.end())
653 // Try matching NAME without ".a" at the end.
654 size_t length
= strlen(basename
);
656 && (basename
[length
- 2] == '.')
657 && (basename
[length
- 1] == 'a'))
659 p
= excluded_libs_
.find(std::string(basename
, length
- 2));
660 if (p
!= excluded_libs_
.end())
667 // Recognize input and output target names. The GNU linker accepts
668 // these with --format and --oformat. This code is intended to be
669 // minimally compatible. In practice for an ELF target this would be
670 // the same target as the input files; that name always start with
671 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
674 General_options::Object_format
675 General_options::string_to_object_format(const char* arg
)
677 if (strncmp(arg
, "elf", 3) == 0 || strcmp(arg
, "default") == 0)
678 return gold::General_options::OBJECT_FORMAT_ELF
;
679 else if (strcmp(arg
, "binary") == 0)
680 return gold::General_options::OBJECT_FORMAT_BINARY
;
683 gold::gold_error(_("format '%s' not supported; treating as elf "
684 "(supported formats: elf, binary)"),
686 return gold::General_options::OBJECT_FORMAT_ELF
;
691 General_options::parse_fix_v4bx(const char*, const char*,
694 this->fix_v4bx_
= FIX_V4BX_REPLACE
;
698 General_options::parse_fix_v4bx_interworking(const char*, const char*,
701 this->fix_v4bx_
= FIX_V4BX_INTERWORKING
;
705 General_options::parse_EB(const char*, const char*, Command_line
*)
707 this->endianness_
= ENDIANNESS_BIG
;
711 General_options::parse_EL(const char*, const char*, Command_line
*)
713 this->endianness_
= ENDIANNESS_LITTLE
;
716 } // End namespace gold.
725 _("%s: use the --help option for usage information\n"),
727 ::exit(EXIT_FAILURE
);
731 usage(const char* msg
, const char* opt
)
735 gold::program_name
, opt
, msg
);
739 // If the default sysroot is relocatable, try relocating it based on
743 get_relative_sysroot(const char* from
)
745 char* path
= make_relative_prefix(gold::program_name
, from
,
750 if (::stat(path
, &s
) == 0 && S_ISDIR(s
.st_mode
))
758 // Return the default sysroot. This is set by the --with-sysroot
759 // option to configure. Note we do not free the return value of
760 // get_relative_sysroot, which is a small memory leak, but is
761 // necessary since we store this pointer directly in General_options.
764 get_default_sysroot()
766 const char* sysroot
= TARGET_SYSTEM_ROOT
;
767 if (*sysroot
== '\0')
770 if (TARGET_SYSTEM_ROOT_RELOCATABLE
)
772 char* path
= get_relative_sysroot(BINDIR
);
774 path
= get_relative_sysroot(TOOLBINDIR
);
782 // Parse a long option. Such options have the form
783 // <-|--><option>[=arg]. If "=arg" is not present but the option
784 // takes an argument, the next word is taken to the be the argument.
785 // If equals_only is set, then only the <option>=<arg> form is
786 // accepted, not the <option><space><arg> form. Returns a One_option
787 // struct or NULL if argv[i] cannot be parsed as a long option. In
788 // the not-NULL case, *arg is set to the option's argument (NULL if
789 // the option takes no argument), and *i is advanced past this option.
790 // NOTE: it is safe for argv and arg to point to the same place.
791 gold::options::One_option
*
792 parse_long_option(int argc
, const char** argv
, bool equals_only
,
793 const char** arg
, int* i
)
795 const char* const this_argv
= argv
[*i
];
797 const char* equals
= strchr(this_argv
, '=');
798 const char* option_start
= this_argv
+ strspn(this_argv
, "-");
799 std::string
option(option_start
,
800 equals
? equals
- option_start
: strlen(option_start
));
802 gold::options::Option_map::iterator it
803 = gold::options::long_options
->find(option
);
804 if (it
== gold::options::long_options
->end())
807 gold::options::One_option
* retval
= it
->second
;
809 // If the dash-count doesn't match, we fail.
810 if (this_argv
[0] != '-') // no dashes at all: had better be "-z <longopt>"
812 if (retval
->dashes
!= gold::options::DASH_Z
)
815 else if (this_argv
[1] != '-') // one dash
817 if (retval
->dashes
!= gold::options::ONE_DASH
818 && retval
->dashes
!= gold::options::EXACTLY_ONE_DASH
819 && retval
->dashes
!= gold::options::TWO_DASHES
)
822 else // two dashes (or more!)
824 if (retval
->dashes
!= gold::options::TWO_DASHES
825 && retval
->dashes
!= gold::options::EXACTLY_TWO_DASHES
826 && retval
->dashes
!= gold::options::ONE_DASH
)
830 // Now that we know the option is good (or else bad in a way that
831 // will cause us to die), increment i to point past this argv.
834 // Figure out the option's argument, if any.
835 if (!retval
->takes_argument())
838 usage(_("unexpected argument"), this_argv
);
846 else if (retval
->takes_optional_argument())
847 *arg
= retval
->default_value
;
848 else if (*i
< argc
&& !equals_only
)
851 usage(_("missing argument"), this_argv
);
857 // Parse a short option. Such options have the form -<option>[arg].
858 // If "arg" is not present but the option takes an argument, the next
859 // word is taken to the be the argument. If the option does not take
860 // an argument, it may be followed by another short option. Returns a
861 // One_option struct or NULL if argv[i] cannot be parsed as a short
862 // option. In the not-NULL case, *arg is set to the option's argument
863 // (NULL if the option takes no argument), and *i is advanced past
864 // this option. This function keeps *i the same if we parsed a short
865 // option that does not take an argument, that looks to be followed by
866 // another short option in the same word.
867 gold::options::One_option
*
868 parse_short_option(int argc
, const char** argv
, int pos_in_argv_i
,
869 const char** arg
, int* i
)
871 const char* const this_argv
= argv
[*i
];
873 if (this_argv
[0] != '-')
876 // We handle -z as a special case.
877 static gold::options::One_option
dash_z("", gold::options::DASH_Z
,
878 'z', "", NULL
, "Z-OPTION", false,
880 gold::options::One_option
* retval
= NULL
;
881 if (this_argv
[pos_in_argv_i
] == 'z')
885 const int char_as_int
= static_cast<int>(this_argv
[pos_in_argv_i
]);
886 if (char_as_int
> 0 && char_as_int
< 128)
887 retval
= gold::options::short_options
[char_as_int
];
893 // Figure out the option's argument, if any.
894 if (!retval
->takes_argument())
897 // We only advance past this argument if it's the only one in argv.
898 if (this_argv
[pos_in_argv_i
+ 1] == '\0')
903 // If we take an argument, we'll eat up this entire argv entry.
905 if (this_argv
[pos_in_argv_i
+ 1] != '\0')
906 *arg
= this_argv
+ pos_in_argv_i
+ 1;
907 else if (retval
->takes_optional_argument())
908 *arg
= retval
->default_value
;
912 usage(_("missing argument"), this_argv
);
915 // If we're a -z option, we need to parse our argument as a
916 // long-option, e.g. "-z stacksize=8192".
917 if (retval
== &dash_z
)
920 const char* dash_z_arg
= *arg
;
921 retval
= parse_long_option(1, arg
, true, arg
, &dummy_i
);
923 usage(_("unknown -z option"), dash_z_arg
);
929 } // End anonymous namespace.
934 General_options::General_options()
935 : printed_version_(false),
936 execstack_status_(EXECSTACK_FROM_INPUT
),
937 icf_status_(ICF_NONE
),
942 have_dynamic_list_(false),
943 incremental_mode_(INCREMENTAL_OFF
),
944 incremental_disposition_(INCREMENTAL_STARTUP
),
945 incremental_startup_disposition_(INCREMENTAL_CHECK
),
946 implicit_incremental_(false),
948 symbols_to_retain_(),
950 fix_v4bx_(FIX_V4BX_NONE
),
951 endianness_(ENDIANNESS_NOT_SET
),
952 discard_locals_(DISCARD_SEC_MERGE
)
954 // Turn off option registration once construction is complete.
955 gold::options::ready_to_register
= false;
958 General_options::Object_format
959 General_options::format_enum() const
961 return General_options::string_to_object_format(this->format());
964 General_options::Object_format
965 General_options::oformat_enum() const
967 return General_options::string_to_object_format(this->oformat());
970 // Add the sysroot, if any, to the search paths.
973 General_options::add_sysroot()
975 if (this->sysroot() == NULL
|| this->sysroot()[0] == '\0')
977 this->set_sysroot(get_default_sysroot());
978 if (this->sysroot() == NULL
|| this->sysroot()[0] == '\0')
982 char* canonical_sysroot
= lrealpath(this->sysroot());
984 for (Dir_list::iterator p
= this->library_path_
.value
.begin();
985 p
!= this->library_path_
.value
.end();
987 p
->add_sysroot(this->sysroot(), canonical_sysroot
);
989 free(canonical_sysroot
);
992 // Return whether FILENAME is in a system directory.
995 General_options::is_in_system_directory(const std::string
& filename
) const
997 for (Dir_list::const_iterator p
= this->library_path_
.value
.begin();
998 p
!= this->library_path_
.value
.end();
1001 // We use a straight string comparison rather than calling
1002 // FILENAME_CMP because we are only interested in the cases
1003 // where we found the file in a system directory, which means
1004 // that we used the directory name as a prefix for a -L search.
1005 if (p
->is_system_directory()
1006 && filename
.compare(0, p
->name().size(), p
->name()) == 0)
1012 // Add a plugin to the list of plugins.
1015 General_options::add_plugin(const char* filename
)
1017 if (this->plugins_
== NULL
)
1018 this->plugins_
= new Plugin_manager(*this);
1019 this->plugins_
->add_plugin(filename
);
1022 // Add a plugin option to a plugin.
1025 General_options::add_plugin_option(const char* arg
)
1027 if (this->plugins_
== NULL
)
1028 gold_fatal("--plugin-opt requires --plugin.");
1029 this->plugins_
->add_plugin_option(arg
);
1032 // Set up variables and other state that isn't set up automatically by
1033 // the parse routine, and ensure options don't contradict each other
1034 // and are otherwise kosher.
1037 General_options::finalize()
1039 // Normalize the strip modifiers. They have a total order:
1040 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
1041 // If one is true, set all beneath it to true as well.
1042 if (this->strip_all())
1043 this->set_strip_debug(true);
1044 if (this->strip_debug())
1045 this->set_strip_debug_non_line(true);
1046 if (this->strip_debug_non_line())
1047 this->set_strip_debug_gdb(true);
1049 if (this->Bshareable())
1050 this->set_shared(true);
1052 // If the user specifies both -s and -r, convert the -s to -S.
1053 // -r requires us to keep externally visible symbols!
1054 if (this->strip_all() && this->relocatable())
1056 this->set_strip_all(false);
1057 gold_assert(this->strip_debug());
1060 // For us, -dc and -dp are synonyms for --define-common.
1062 this->set_define_common(true);
1064 this->set_define_common(true);
1066 // We also set --define-common if we're not relocatable, as long as
1067 // the user didn't explicitly ask for something different.
1068 if (!this->user_set_define_common())
1069 this->set_define_common(!this->relocatable());
1071 // execstack_status_ is a three-state variable; update it based on
1072 // -z [no]execstack.
1073 if (this->execstack())
1074 this->set_execstack_status(EXECSTACK_YES
);
1075 else if (this->noexecstack())
1076 this->set_execstack_status(EXECSTACK_NO
);
1078 // icf_status_ is a three-state variable; update it based on the
1079 // value of this->icf().
1080 if (strcmp(this->icf(), "none") == 0)
1081 this->set_icf_status(ICF_NONE
);
1082 else if (strcmp(this->icf(), "safe") == 0)
1083 this->set_icf_status(ICF_SAFE
);
1085 this->set_icf_status(ICF_ALL
);
1087 // Handle the optional argument for --demangle.
1088 if (this->user_set_demangle())
1090 this->set_do_demangle(true);
1091 const char* style
= this->demangle();
1094 enum demangling_styles style_code
;
1096 style_code
= cplus_demangle_name_to_style(style
);
1097 if (style_code
== unknown_demangling
)
1098 gold_fatal("unknown demangling style '%s'", style
);
1099 cplus_demangle_set_style(style_code
);
1102 else if (this->user_set_no_demangle())
1103 this->set_do_demangle(false);
1106 // Testing COLLECT_NO_DEMANGLE makes our default demangling
1107 // behaviour identical to that of gcc's linker wrapper.
1108 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL
);
1111 // -M is equivalent to "-Map -".
1112 if (this->print_map() && !this->user_set_Map())
1115 this->set_user_set_Map();
1118 // Using -n or -N implies -static.
1119 if (this->nmagic() || this->omagic())
1120 this->set_static(true);
1122 // If --thread_count is specified, it applies to
1123 // --thread-count-{initial,middle,final}, though it doesn't override
1125 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
1126 this->set_thread_count_initial(this->thread_count());
1127 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
1128 this->set_thread_count_middle(this->thread_count());
1129 if (this->thread_count() > 0 && this->thread_count_final() == 0)
1130 this->set_thread_count_final(this->thread_count());
1132 // Let's warn if you set the thread-count but we're going to ignore it.
1133 #ifndef ENABLE_THREADS
1134 if (this->threads())
1136 gold_warning(_("ignoring --threads: "
1137 "%s was compiled without thread support"),
1139 this->set_threads(false);
1141 if (this->thread_count() > 0 || this->thread_count_initial() > 0
1142 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
1143 gold_warning(_("ignoring --thread-count: "
1144 "%s was compiled without thread support"),
1148 std::string libpath
;
1149 if (this->user_set_Y())
1151 libpath
= this->Y();
1152 if (libpath
.compare(0, 2, "P,") == 0)
1153 libpath
.erase(0, 2);
1155 else if (!this->nostdlib())
1157 #ifndef NATIVE_LINKER
1158 #define NATIVE_LINKER 0
1160 const char* p
= LIB_PATH
;
1161 if (strcmp(p
, "::DEFAULT::") != 0)
1163 else if (NATIVE_LINKER
1164 || this->user_set_sysroot()
1165 || *TARGET_SYSTEM_ROOT
!= '\0')
1167 this->add_to_library_path_with_sysroot("/lib");
1168 this->add_to_library_path_with_sysroot("/usr/lib");
1171 this->add_to_library_path_with_sysroot(TOOLLIBDIR
);
1174 if (!libpath
.empty())
1180 next_pos
= libpath
.find(':', pos
);
1181 size_t len
= (next_pos
== std::string::npos
1185 this->add_to_library_path_with_sysroot(libpath
.substr(pos
, len
));
1188 while (next_pos
!= std::string::npos
);
1191 // Parse the contents of -retain-symbols-file into a set.
1192 if (this->retain_symbols_file())
1195 in
.open(this->retain_symbols_file());
1197 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
1198 this->retain_symbols_file(), strerror(errno
));
1200 std::getline(in
, line
); // this chops off the trailing \n, if any
1203 if (!line
.empty() && line
[line
.length() - 1] == '\r') // Windows
1204 line
.resize(line
.length() - 1);
1205 this->symbols_to_retain_
.insert(line
);
1206 std::getline(in
, line
);
1210 // -Bgroup implies --unresolved-symbols=report-all.
1211 if (this->Bgroup() && !this->user_set_unresolved_symbols())
1212 this->set_unresolved_symbols("report-all");
1214 // -shared implies --allow-shlib-undefined. Currently
1215 // ---allow-shlib-undefined controls warnings issued based on the
1216 // -symbol table. --unresolved-symbols controls warnings issued
1217 // -based on relocations.
1218 if (this->shared() && !this->user_set_allow_shlib_undefined())
1219 this->set_allow_shlib_undefined(true);
1221 // Normalize library_path() by adding the sysroot to all directories
1222 // in the path, as appropriate.
1223 this->add_sysroot();
1225 // Now that we've normalized the options, check for contradictory ones.
1226 if (this->shared() && this->is_static())
1227 gold_fatal(_("-shared and -static are incompatible"));
1228 if (this->shared() && this->pie())
1229 gold_fatal(_("-shared and -pie are incompatible"));
1230 if (this->pie() && this->is_static())
1231 gold_fatal(_("-pie and -static are incompatible"));
1233 if (this->shared() && this->relocatable())
1234 gold_fatal(_("-shared and -r are incompatible"));
1235 if (this->pie() && this->relocatable())
1236 gold_fatal(_("-pie and -r are incompatible"));
1238 if (!this->shared())
1240 if (this->filter() != NULL
)
1241 gold_fatal(_("-F/--filter may not used without -shared"));
1242 if (this->any_auxiliary())
1243 gold_fatal(_("-f/--auxiliary may not be used without -shared"));
1246 // TODO: implement support for -retain-symbols-file with -r, if needed.
1247 if (this->relocatable() && this->retain_symbols_file())
1248 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
1250 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
1253 || this->relocatable()))
1254 gold_fatal(_("binary output format not compatible "
1255 "with -shared or -pie or -r"));
1257 if (this->user_set_hash_bucket_empty_fraction()
1258 && (this->hash_bucket_empty_fraction() < 0.0
1259 || this->hash_bucket_empty_fraction() >= 1.0))
1260 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
1262 this->hash_bucket_empty_fraction());
1264 if (this->implicit_incremental_
&& this->incremental_mode_
== INCREMENTAL_OFF
)
1265 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
1266 "--incremental-unknown require the use of --incremental"));
1268 // Check for options that are not compatible with incremental linking.
1269 // Where an option can be disabled without seriously changing the semantics
1270 // of the link, we turn the option off; otherwise, we issue a fatal error.
1272 if (this->incremental_mode_
!= INCREMENTAL_OFF
)
1274 if (this->relocatable())
1275 gold_fatal(_("incremental linking is not compatible with -r"));
1276 if (this->emit_relocs())
1277 gold_fatal(_("incremental linking is not compatible with "
1279 if (this->has_plugins())
1280 gold_fatal(_("incremental linking is not compatible with --plugin"));
1282 gold_fatal(_("incremental linking is not compatible with -z relro"));
1283 if (this->gc_sections())
1285 gold_warning(_("ignoring --gc-sections for an incremental link"));
1286 this->set_gc_sections(false);
1288 if (this->icf_enabled())
1290 gold_warning(_("ignoring --icf for an incremental link"));
1291 this->set_icf_status(ICF_NONE
);
1293 if (strcmp(this->compress_debug_sections(), "none") != 0)
1295 gold_warning(_("ignoring --compress-debug-sections for an "
1296 "incremental link"));
1297 this->set_compress_debug_sections("none");
1301 // --rosegment-gap implies --rosegment.
1302 if (this->user_set_rosegment_gap())
1303 this->set_rosegment(true);
1305 // FIXME: we can/should be doing a lot more sanity checking here.
1308 // Search_directory methods.
1310 // This is called if we have a sysroot. Apply the sysroot if
1311 // appropriate. Record whether the directory is in the sysroot.
1314 Search_directory::add_sysroot(const char* sysroot
,
1315 const char* canonical_sysroot
)
1317 gold_assert(*sysroot
!= '\0');
1318 if (this->put_in_sysroot_
)
1320 if (!IS_DIR_SEPARATOR(this->name_
[0])
1321 && !IS_DIR_SEPARATOR(sysroot
[strlen(sysroot
) - 1]))
1322 this->name_
= '/' + this->name_
;
1323 this->name_
= sysroot
+ this->name_
;
1324 this->is_in_sysroot_
= true;
1328 // Check whether this entry is in the sysroot. To do this
1329 // correctly, we need to use canonical names. Otherwise we will
1330 // get confused by the ../../.. paths that gcc tends to use.
1331 char* canonical_name
= lrealpath(this->name_
.c_str());
1332 int canonical_name_len
= strlen(canonical_name
);
1333 int canonical_sysroot_len
= strlen(canonical_sysroot
);
1334 if (canonical_name_len
> canonical_sysroot_len
1335 && IS_DIR_SEPARATOR(canonical_name
[canonical_sysroot_len
]))
1337 canonical_name
[canonical_sysroot_len
] = '\0';
1338 if (FILENAME_CMP(canonical_name
, canonical_sysroot
) == 0)
1339 this->is_in_sysroot_
= true;
1341 free(canonical_name
);
1345 // Input_arguments methods.
1347 // Add a file to the list.
1350 Input_arguments::add_file(Input_file_argument
& file
)
1352 file
.set_arg_serial(++this->file_count_
);
1353 if (this->in_group_
)
1355 gold_assert(!this->input_argument_list_
.empty());
1356 gold_assert(this->input_argument_list_
.back().is_group());
1357 return this->input_argument_list_
.back().group()->add_file(file
);
1361 gold_assert(!this->input_argument_list_
.empty());
1362 gold_assert(this->input_argument_list_
.back().is_lib());
1363 return this->input_argument_list_
.back().lib()->add_file(file
);
1365 this->input_argument_list_
.push_back(Input_argument(file
));
1366 return this->input_argument_list_
.back();
1372 Input_arguments::start_group()
1374 if (this->in_group_
)
1375 gold_fatal(_("May not nest groups"));
1377 gold_fatal(_("may not nest groups in libraries"));
1378 Input_file_group
* group
= new Input_file_group();
1379 this->input_argument_list_
.push_back(Input_argument(group
));
1380 this->in_group_
= true;
1386 Input_arguments::end_group()
1388 if (!this->in_group_
)
1389 gold_fatal(_("Group end without group start"));
1390 this->in_group_
= false;
1396 Input_arguments::start_lib(const Position_dependent_options
& options
)
1399 gold_fatal(_("may not nest libraries"));
1400 if (this->in_group_
)
1401 gold_fatal(_("may not nest libraries in groups"));
1402 Input_file_lib
* lib
= new Input_file_lib(options
);
1403 this->input_argument_list_
.push_back(Input_argument(lib
));
1404 this->in_lib_
= true;
1410 Input_arguments::end_lib()
1413 gold_fatal(_("lib end without lib start"));
1414 this->in_lib_
= false;
1417 // Command_line options.
1419 Command_line::Command_line()
1423 // Pre_options is the hook that sets the ready_to_register flag.
1425 Command_line::Pre_options::Pre_options()
1427 gold::options::ready_to_register
= true;
1430 // Process the command line options. For process_one_option, i is the
1431 // index of argv to process next, and must be an option (that is,
1432 // start with a dash). The return value is the index of the next
1433 // option to process (i+1 or i+2, or argc to indicate processing is
1434 // done). no_more_options is set to true if (and when) "--" is seen
1438 Command_line::process_one_option(int argc
, const char** argv
, int i
,
1439 bool* no_more_options
)
1441 gold_assert(argv
[i
][0] == '-' && !(*no_more_options
));
1443 // If we are reading "--", then just set no_more_options and return.
1444 if (argv
[i
][1] == '-' && argv
[i
][2] == '\0')
1446 *no_more_options
= true;
1451 options::One_option
* option
= NULL
;
1452 const char* arg
= NULL
;
1454 // First, try to process argv as a long option.
1455 option
= parse_long_option(argc
, argv
, false, &arg
, &new_i
);
1458 option
->reader
->parse_to_value(argv
[i
], arg
, this, &this->options_
);
1462 // Now, try to process argv as a short option. Since several short
1463 // options can be combined in one argv, we may have to parse a lot
1464 // until we're done reading this argv.
1465 int pos_in_argv_i
= 1;
1468 option
= parse_short_option(argc
, argv
, pos_in_argv_i
, &arg
, &new_i
);
1471 option
->reader
->parse_to_value(argv
[i
], arg
, this, &this->options_
);
1477 // I guess it's neither a long option nor a short option.
1478 usage(_("unknown option"), argv
[i
]);
1484 Command_line::process(int argc
, const char** argv
)
1486 bool no_more_options
= false;
1490 this->position_options_
.copy_from_options(this->options());
1491 if (no_more_options
|| argv
[i
][0] != '-')
1493 Input_file_argument
file(argv
[i
],
1494 Input_file_argument::INPUT_FILE_TYPE_FILE
,
1495 "", false, this->position_options_
);
1496 this->inputs_
.add_file(file
);
1500 i
= process_one_option(argc
, argv
, i
, &no_more_options
);
1503 if (this->inputs_
.in_group())
1505 fprintf(stderr
, _("%s: missing group end\n"), program_name
);
1509 // Normalize the options and ensure they don't contradict each other.
1510 this->options_
.finalize();
1513 // Finalize the version script options and return them.
1515 const Version_script_info
&
1516 Command_line::version_script()
1518 this->options_
.finalize_dynamic_list();
1519 Version_script_info
* vsi
= this->script_options_
.version_script_info();
1524 } // End namespace gold.