1 // options.c -- handle command line options for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013
4 // Free Software Foundation, Inc.
5 // Written by Ian Lance Taylor <iant@google.com>.
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
33 #include "filenames.h"
34 #include "libiberty.h"
36 #include "../bfd/bfdver.h"
40 #include "target-select.h"
48 Position_dependent_options::default_options_
;
53 // This flag is TRUE if we should register the command-line options as they
54 // are constructed. It is set after construction of the options within
55 // class Position_dependent_options.
56 static bool ready_to_register
= false;
58 // This global variable is set up as General_options is constructed.
59 static std::vector
<const One_option
*> registered_options
;
61 // These are set up at the same time -- the variables that accept one
62 // dash, two, or require -z. A single variable may be in more than
63 // one of these data structures.
64 typedef Unordered_map
<std::string
, One_option
*> Option_map
;
65 static Option_map
* long_options
= NULL
;
66 static One_option
* short_options
[128];
69 One_option::register_option()
71 if (!ready_to_register
)
74 registered_options
.push_back(this);
76 // We can't make long_options a static Option_map because we can't
77 // guarantee that will be initialized before register_option() is
79 if (long_options
== NULL
)
80 long_options
= new Option_map
;
82 // TWO_DASHES means that two dashes are preferred, but one is ok too.
83 if (!this->longname
.empty())
84 (*long_options
)[this->longname
] = this;
86 const int shortname_as_int
= static_cast<int>(this->shortname
);
87 gold_assert(shortname_as_int
>= 0 && shortname_as_int
< 128);
88 if (this->shortname
!= '\0')
90 gold_assert(short_options
[shortname_as_int
] == NULL
);
91 short_options
[shortname_as_int
] = this;
96 One_option::print() const
101 if (this->shortname
!= '\0')
103 len
+= printf("-%c", this->shortname
);
106 // -z takes long-names only.
107 gold_assert(this->dashes
!= DASH_Z
);
108 len
+= printf(" %s", gettext(this->helparg
));
112 if (!this->longname
.empty()
113 && !(this->longname
[0] == this->shortname
114 && this->longname
[1] == '\0'))
118 switch (this->dashes
)
120 case options::ONE_DASH
: case options::EXACTLY_ONE_DASH
:
123 case options::TWO_DASHES
: case options::EXACTLY_TWO_DASHES
:
126 case options::DASH_Z
:
127 len
+= printf("-z ");
132 len
+= printf("%s", this->longname
.c_str());
135 // For most options, we print "--frob FOO". But for -z
136 // we print "-z frob=FOO".
137 len
+= printf("%c%s", this->dashes
== options::DASH_Z
? '=' : ' ',
138 gettext(this->helparg
));
147 for (; len
< 30; ++len
)
150 // TODO: if we're boolean, add " (default)" when appropriate.
151 printf("%s\n", gettext(this->helpstring
));
157 printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name
);
159 std::vector
<const One_option
*>::const_iterator it
;
160 for (it
= registered_options
.begin(); it
!= registered_options
.end(); ++it
)
163 // config.guess and libtool.m4 look in ld --help output for the
164 // string "supported targets".
165 printf(_("%s: supported targets:"), gold::program_name
);
166 std::vector
<const char*> supported_names
;
167 gold::supported_target_names(&supported_names
);
168 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
169 p
!= supported_names
.end();
174 printf(_("%s: supported emulations:"), gold::program_name
);
175 supported_names
.clear();
176 gold::supported_emulation_names(&supported_names
);
177 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
178 p
!= supported_names
.end();
183 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
184 const char* report
= REPORT_BUGS_TO
;
186 printf(_("Report bugs to %s\n"), report
);
189 // For bool, arg will be NULL (boolean options take no argument);
190 // we always just set to true.
192 parse_bool(const char*, const char*, bool* retval
)
198 parse_uint(const char* option_name
, const char* arg
, int* retval
)
201 *retval
= strtol(arg
, &endptr
, 0);
202 if (*endptr
!= '\0' || *retval
< 0)
203 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
208 parse_int(const char* option_name
, const char* arg
, int* retval
)
211 *retval
= strtol(arg
, &endptr
, 0);
213 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
218 parse_uint64(const char* option_name
, const char* arg
, uint64_t* retval
)
221 *retval
= strtoull(arg
, &endptr
, 0);
223 gold_fatal(_("%s: invalid option value (expected an integer): %s"),
228 parse_double(const char* option_name
, const char* arg
, double* retval
)
231 *retval
= strtod(arg
, &endptr
);
233 gold_fatal(_("%s: invalid option value "
234 "(expected a floating point number): %s"),
239 parse_percent(const char* option_name
, const char* arg
, double* retval
)
242 *retval
= strtod(arg
, &endptr
) / 100.0;
244 gold_fatal(_("%s: invalid option value "
245 "(expected a floating point number): %s"),
250 parse_string(const char* option_name
, const char* arg
, const char** retval
)
253 gold_fatal(_("%s: must take a non-empty argument"), option_name
);
258 parse_optional_string(const char*, const char* arg
, const char** retval
)
264 parse_dirlist(const char*, const char* arg
, Dir_list
* retval
)
266 retval
->push_back(Search_directory(arg
, false));
270 parse_set(const char*, const char* arg
, String_set
* retval
)
272 retval
->insert(std::string(arg
));
276 parse_choices(const char* option_name
, const char* arg
, const char** retval
,
277 const char* choices
[], int num_choices
)
279 for (int i
= 0; i
< num_choices
; i
++)
280 if (strcmp(choices
[i
], arg
) == 0)
286 // If we get here, the user did not enter a valid choice, so we die.
287 std::string choices_list
;
288 for (int i
= 0; i
< num_choices
; i
++)
290 choices_list
+= choices
[i
];
291 if (i
!= num_choices
- 1)
292 choices_list
+= ", ";
294 gold_fatal(_("%s: must take one of the following arguments: %s"),
295 option_name
, choices_list
.c_str());
298 } // End namespace options.
300 // Define the handler for "special" options (set via DEFINE_special).
303 General_options::parse_help(const char*, const char*, Command_line
*)
306 ::exit(EXIT_SUCCESS
);
310 General_options::parse_version(const char* opt
, const char*, Command_line
*)
312 bool print_short
= (opt
[0] == '-' && opt
[1] == 'v');
313 gold::print_version(print_short
);
314 this->printed_version_
= true;
316 ::exit(EXIT_SUCCESS
);
320 General_options::parse_V(const char*, const char*, Command_line
*)
322 gold::print_version(true);
323 this->printed_version_
= true;
325 printf(_(" Supported targets:\n"));
326 std::vector
<const char*> supported_names
;
327 gold::supported_target_names(&supported_names
);
328 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
329 p
!= supported_names
.end();
333 printf(_(" Supported emulations:\n"));
334 supported_names
.clear();
335 gold::supported_emulation_names(&supported_names
);
336 for (std::vector
<const char*>::const_iterator p
= supported_names
.begin();
337 p
!= supported_names
.end();
343 General_options::parse_defsym(const char*, const char* arg
,
344 Command_line
* cmdline
)
346 cmdline
->script_options().define_symbol(arg
);
350 General_options::parse_incremental(const char*, const char*,
353 this->incremental_mode_
= INCREMENTAL_AUTO
;
357 General_options::parse_no_incremental(const char*, const char*,
360 this->incremental_mode_
= INCREMENTAL_OFF
;
364 General_options::parse_incremental_full(const char*, const char*,
367 this->incremental_mode_
= INCREMENTAL_FULL
;
371 General_options::parse_incremental_update(const char*, const char*,
374 this->incremental_mode_
= INCREMENTAL_UPDATE
;
378 General_options::parse_incremental_changed(const char*, const char*,
381 this->implicit_incremental_
= true;
382 this->incremental_disposition_
= INCREMENTAL_CHANGED
;
386 General_options::parse_incremental_unchanged(const char*, const char*,
389 this->implicit_incremental_
= true;
390 this->incremental_disposition_
= INCREMENTAL_UNCHANGED
;
394 General_options::parse_incremental_unknown(const char*, const char*,
397 this->implicit_incremental_
= true;
398 this->incremental_disposition_
= INCREMENTAL_CHECK
;
402 General_options::parse_incremental_startup_unchanged(const char*, const char*,
405 this->implicit_incremental_
= true;
406 this->incremental_startup_disposition_
= INCREMENTAL_UNCHANGED
;
410 General_options::parse_library(const char*, const char* arg
,
411 Command_line
* cmdline
)
413 Input_file_argument::Input_file_type type
;
417 type
= Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE
;
422 type
= Input_file_argument::INPUT_FILE_TYPE_LIBRARY
;
425 Input_file_argument
file(name
, type
, "", false, *this);
426 cmdline
->inputs().add_file(file
);
429 #ifdef ENABLE_PLUGINS
431 General_options::parse_plugin(const char*, const char* arg
,
434 this->add_plugin(arg
);
437 // Parse --plugin-opt.
440 General_options::parse_plugin_opt(const char*, const char* arg
,
443 this->add_plugin_option(arg
);
445 #endif // ENABLE_PLUGINS
448 General_options::parse_R(const char* option
, const char* arg
,
449 Command_line
* cmdline
)
452 if (::stat(arg
, &s
) != 0 || S_ISDIR(s
.st_mode
))
453 this->add_to_rpath(arg
);
455 this->parse_just_symbols(option
, arg
, cmdline
);
459 General_options::parse_just_symbols(const char*, const char* arg
,
460 Command_line
* cmdline
)
462 Input_file_argument
file(arg
, Input_file_argument::INPUT_FILE_TYPE_FILE
,
464 cmdline
->inputs().add_file(file
);
467 // Handle --section-start.
470 General_options::parse_section_start(const char*, const char* arg
,
473 const char* eq
= strchr(arg
, '=');
476 gold_error(_("invalid argument to --section-start; "
477 "must be SECTION=ADDRESS"));
481 std::string
section_name(arg
, eq
- arg
);
484 const char* val_start
= eq
;
485 if (eq
[0] == '0' && (eq
[1] == 'x' || eq
[1] == 'X'))
489 gold_error(_("--section-start address missing"));
494 for (; *eq
!= '\0'; ++eq
)
498 gold_error(_("--section-start argument %s is not a valid hex number"),
503 addr
+= hex_value(*eq
);
506 this->section_starts_
[section_name
] = addr
;
509 // Look up a --section-start value.
512 General_options::section_start(const char* secname
, uint64_t* paddr
) const
514 if (this->section_starts_
.empty())
516 std::map
<std::string
, uint64_t>::const_iterator p
=
517 this->section_starts_
.find(secname
);
518 if (p
== this->section_starts_
.end())
525 General_options::parse_static(const char*, const char*, Command_line
*)
527 this->set_static(true);
531 General_options::parse_script(const char*, const char* arg
,
532 Command_line
* cmdline
)
534 if (!read_commandline_script(arg
, cmdline
))
535 gold::gold_fatal(_("unable to parse script file %s"), arg
);
539 General_options::parse_version_script(const char*, const char* arg
,
540 Command_line
* cmdline
)
542 if (!read_version_script(arg
, cmdline
))
543 gold::gold_fatal(_("unable to parse version script file %s"), arg
);
547 General_options::parse_dynamic_list(const char*, const char* arg
,
548 Command_line
* cmdline
)
550 if (!read_dynamic_list(arg
, cmdline
, &this->dynamic_list_
))
551 gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg
);
552 this->have_dynamic_list_
= true;
556 General_options::parse_start_group(const char*, const char*,
557 Command_line
* cmdline
)
559 cmdline
->inputs().start_group();
563 General_options::parse_end_group(const char*, const char*,
564 Command_line
* cmdline
)
566 cmdline
->inputs().end_group();
570 General_options::parse_start_lib(const char*, const char*,
571 Command_line
* cmdline
)
573 cmdline
->inputs().start_lib(cmdline
->position_dependent_options());
577 General_options::parse_end_lib(const char*, const char*,
578 Command_line
* cmdline
)
580 cmdline
->inputs().end_lib();
583 // The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
584 // of names separated by commas or colons and puts them in a linked list.
585 // We implement the same parsing of names here but store names in an unordered
586 // map to speed up searching of names.
589 General_options::parse_exclude_libs(const char*, const char* arg
,
596 size_t length
= strcspn(p
, ",:");
597 this->excluded_libs_
.insert(std::string(p
, length
));
598 p
+= (p
[length
] ? length
+ 1 : length
);
602 // The checking logic is based on the function check_excluded_libs() in
603 // ld/ldlang.c of GNU ld but our implementation is different because we use
604 // an unordered map instead of a linked list, which is what GNU ld uses. GNU
605 // ld searches sequentially in the excluded libs list. For a given archive,
606 // a match is found if the archive's name matches exactly one of the list
607 // entry or if the archive's name is of the form FOO.a and FOO matches exactly
608 // one of the list entry. An entry "ALL" in the list is considered as a
609 // wild-card and matches any given name.
612 General_options::check_excluded_libs(const std::string
&name
) const
614 Unordered_set
<std::string
>::const_iterator p
;
616 // Exit early for the most common case.
617 if (excluded_libs_
.empty())
620 // If we see "ALL", all archives are excluded from automatic export.
621 p
= excluded_libs_
.find(std::string("ALL"));
622 if (p
!= excluded_libs_
.end())
625 // First strip off any directories in name.
626 const char* basename
= lbasename(name
.c_str());
628 // Try finding an exact match.
629 p
= excluded_libs_
.find(std::string(basename
));
630 if (p
!= excluded_libs_
.end())
633 // Try matching NAME without ".a" at the end.
634 size_t length
= strlen(basename
);
636 && (basename
[length
- 2] == '.')
637 && (basename
[length
- 1] == 'a'))
639 p
= excluded_libs_
.find(std::string(basename
, length
- 2));
640 if (p
!= excluded_libs_
.end())
647 // Recognize input and output target names. The GNU linker accepts
648 // these with --format and --oformat. This code is intended to be
649 // minimally compatible. In practice for an ELF target this would be
650 // the same target as the input files; that name always start with
651 // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
654 General_options::Object_format
655 General_options::string_to_object_format(const char* arg
)
657 if (strncmp(arg
, "elf", 3) == 0 || strcmp(arg
, "default") == 0)
658 return gold::General_options::OBJECT_FORMAT_ELF
;
659 else if (strcmp(arg
, "binary") == 0)
660 return gold::General_options::OBJECT_FORMAT_BINARY
;
663 gold::gold_error(_("format '%s' not supported; treating as elf "
664 "(supported formats: elf, binary)"),
666 return gold::General_options::OBJECT_FORMAT_ELF
;
671 General_options::parse_fix_v4bx(const char*, const char*,
674 this->fix_v4bx_
= FIX_V4BX_REPLACE
;
678 General_options::parse_fix_v4bx_interworking(const char*, const char*,
681 this->fix_v4bx_
= FIX_V4BX_INTERWORKING
;
685 General_options::parse_EB(const char*, const char*, Command_line
*)
687 this->endianness_
= ENDIANNESS_BIG
;
691 General_options::parse_EL(const char*, const char*, Command_line
*)
693 this->endianness_
= ENDIANNESS_LITTLE
;
696 } // End namespace gold.
705 _("%s: use the --help option for usage information\n"),
707 ::exit(EXIT_FAILURE
);
711 usage(const char* msg
, const char* opt
)
715 gold::program_name
, opt
, msg
);
719 // If the default sysroot is relocatable, try relocating it based on
723 get_relative_sysroot(const char* from
)
725 char* path
= make_relative_prefix(gold::program_name
, from
,
730 if (::stat(path
, &s
) == 0 && S_ISDIR(s
.st_mode
))
738 // Return the default sysroot. This is set by the --with-sysroot
739 // option to configure. Note we do not free the return value of
740 // get_relative_sysroot, which is a small memory leak, but is
741 // necessary since we store this pointer directly in General_options.
744 get_default_sysroot()
746 const char* sysroot
= TARGET_SYSTEM_ROOT
;
747 if (*sysroot
== '\0')
750 if (TARGET_SYSTEM_ROOT_RELOCATABLE
)
752 char* path
= get_relative_sysroot(BINDIR
);
754 path
= get_relative_sysroot(TOOLBINDIR
);
762 // Parse a long option. Such options have the form
763 // <-|--><option>[=arg]. If "=arg" is not present but the option
764 // takes an argument, the next word is taken to the be the argument.
765 // If equals_only is set, then only the <option>=<arg> form is
766 // accepted, not the <option><space><arg> form. Returns a One_option
767 // struct or NULL if argv[i] cannot be parsed as a long option. In
768 // the not-NULL case, *arg is set to the option's argument (NULL if
769 // the option takes no argument), and *i is advanced past this option.
770 // NOTE: it is safe for argv and arg to point to the same place.
771 gold::options::One_option
*
772 parse_long_option(int argc
, const char** argv
, bool equals_only
,
773 const char** arg
, int* i
)
775 const char* const this_argv
= argv
[*i
];
777 const char* equals
= strchr(this_argv
, '=');
778 const char* option_start
= this_argv
+ strspn(this_argv
, "-");
779 std::string
option(option_start
,
780 equals
? equals
- option_start
: strlen(option_start
));
782 gold::options::Option_map::iterator it
783 = gold::options::long_options
->find(option
);
784 if (it
== gold::options::long_options
->end())
787 gold::options::One_option
* retval
= it
->second
;
789 // If the dash-count doesn't match, we fail.
790 if (this_argv
[0] != '-') // no dashes at all: had better be "-z <longopt>"
792 if (retval
->dashes
!= gold::options::DASH_Z
)
795 else if (this_argv
[1] != '-') // one dash
797 if (retval
->dashes
!= gold::options::ONE_DASH
798 && retval
->dashes
!= gold::options::EXACTLY_ONE_DASH
799 && retval
->dashes
!= gold::options::TWO_DASHES
)
802 else // two dashes (or more!)
804 if (retval
->dashes
!= gold::options::TWO_DASHES
805 && retval
->dashes
!= gold::options::EXACTLY_TWO_DASHES
806 && retval
->dashes
!= gold::options::ONE_DASH
)
810 // Now that we know the option is good (or else bad in a way that
811 // will cause us to die), increment i to point past this argv.
814 // Figure out the option's argument, if any.
815 if (!retval
->takes_argument())
818 usage(_("unexpected argument"), this_argv
);
826 else if (retval
->takes_optional_argument())
827 *arg
= retval
->default_value
;
828 else if (*i
< argc
&& !equals_only
)
831 usage(_("missing argument"), this_argv
);
837 // Parse a short option. Such options have the form -<option>[arg].
838 // If "arg" is not present but the option takes an argument, the next
839 // word is taken to the be the argument. If the option does not take
840 // an argument, it may be followed by another short option. Returns a
841 // One_option struct or NULL if argv[i] cannot be parsed as a short
842 // option. In the not-NULL case, *arg is set to the option's argument
843 // (NULL if the option takes no argument), and *i is advanced past
844 // this option. This function keeps *i the same if we parsed a short
845 // option that does not take an argument, that looks to be followed by
846 // another short option in the same word.
847 gold::options::One_option
*
848 parse_short_option(int argc
, const char** argv
, int pos_in_argv_i
,
849 const char** arg
, int* i
)
851 const char* const this_argv
= argv
[*i
];
853 if (this_argv
[0] != '-')
856 // We handle -z as a special case.
857 static gold::options::One_option
dash_z("", gold::options::DASH_Z
,
858 'z', "", NULL
, "Z-OPTION", false,
860 gold::options::One_option
* retval
= NULL
;
861 if (this_argv
[pos_in_argv_i
] == 'z')
865 const int char_as_int
= static_cast<int>(this_argv
[pos_in_argv_i
]);
866 if (char_as_int
> 0 && char_as_int
< 128)
867 retval
= gold::options::short_options
[char_as_int
];
873 // Figure out the option's argument, if any.
874 if (!retval
->takes_argument())
877 // We only advance past this argument if it's the only one in argv.
878 if (this_argv
[pos_in_argv_i
+ 1] == '\0')
883 // If we take an argument, we'll eat up this entire argv entry.
885 if (this_argv
[pos_in_argv_i
+ 1] != '\0')
886 *arg
= this_argv
+ pos_in_argv_i
+ 1;
887 else if (retval
->takes_optional_argument())
888 *arg
= retval
->default_value
;
892 usage(_("missing argument"), this_argv
);
895 // If we're a -z option, we need to parse our argument as a
896 // long-option, e.g. "-z stacksize=8192".
897 if (retval
== &dash_z
)
900 const char* dash_z_arg
= *arg
;
901 retval
= parse_long_option(1, arg
, true, arg
, &dummy_i
);
903 usage(_("unknown -z option"), dash_z_arg
);
909 } // End anonymous namespace.
914 General_options::General_options()
915 : printed_version_(false),
916 execstack_status_(EXECSTACK_FROM_INPUT
),
917 icf_status_(ICF_NONE
),
922 have_dynamic_list_(false),
923 incremental_mode_(INCREMENTAL_OFF
),
924 incremental_disposition_(INCREMENTAL_STARTUP
),
925 incremental_startup_disposition_(INCREMENTAL_CHECK
),
926 implicit_incremental_(false),
928 symbols_to_retain_(),
930 fix_v4bx_(FIX_V4BX_NONE
),
931 endianness_(ENDIANNESS_NOT_SET
)
933 // Turn off option registration once construction is complete.
934 gold::options::ready_to_register
= false;
937 General_options::Object_format
938 General_options::format_enum() const
940 return General_options::string_to_object_format(this->format());
943 General_options::Object_format
944 General_options::oformat_enum() const
946 return General_options::string_to_object_format(this->oformat());
949 // Add the sysroot, if any, to the search paths.
952 General_options::add_sysroot()
954 if (this->sysroot() == NULL
|| this->sysroot()[0] == '\0')
956 this->set_sysroot(get_default_sysroot());
957 if (this->sysroot() == NULL
|| this->sysroot()[0] == '\0')
961 char* canonical_sysroot
= lrealpath(this->sysroot());
963 for (Dir_list::iterator p
= this->library_path_
.value
.begin();
964 p
!= this->library_path_
.value
.end();
966 p
->add_sysroot(this->sysroot(), canonical_sysroot
);
968 free(canonical_sysroot
);
971 // Return whether FILENAME is in a system directory.
974 General_options::is_in_system_directory(const std::string
& filename
) const
976 for (Dir_list::const_iterator p
= this->library_path_
.value
.begin();
977 p
!= this->library_path_
.value
.end();
980 // We use a straight string comparison rather than calling
981 // FILENAME_CMP because we are only interested in the cases
982 // where we found the file in a system directory, which means
983 // that we used the directory name as a prefix for a -L search.
984 if (p
->is_system_directory()
985 && filename
.compare(0, p
->name().size(), p
->name()) == 0)
991 // Add a plugin to the list of plugins.
994 General_options::add_plugin(const char* filename
)
996 if (this->plugins_
== NULL
)
997 this->plugins_
= new Plugin_manager(*this);
998 this->plugins_
->add_plugin(filename
);
1001 // Add a plugin option to a plugin.
1004 General_options::add_plugin_option(const char* arg
)
1006 if (this->plugins_
== NULL
)
1007 gold_fatal("--plugin-opt requires --plugin.");
1008 this->plugins_
->add_plugin_option(arg
);
1011 // Set up variables and other state that isn't set up automatically by
1012 // the parse routine, and ensure options don't contradict each other
1013 // and are otherwise kosher.
1016 General_options::finalize()
1018 // Normalize the strip modifiers. They have a total order:
1019 // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
1020 // If one is true, set all beneath it to true as well.
1021 if (this->strip_all())
1022 this->set_strip_debug(true);
1023 if (this->strip_debug())
1024 this->set_strip_debug_non_line(true);
1025 if (this->strip_debug_non_line())
1026 this->set_strip_debug_gdb(true);
1028 if (this->Bshareable())
1029 this->set_shared(true);
1031 // If the user specifies both -s and -r, convert the -s to -S.
1032 // -r requires us to keep externally visible symbols!
1033 if (this->strip_all() && this->relocatable())
1035 this->set_strip_all(false);
1036 gold_assert(this->strip_debug());
1039 // For us, -dc and -dp are synonyms for --define-common.
1041 this->set_define_common(true);
1043 this->set_define_common(true);
1045 // We also set --define-common if we're not relocatable, as long as
1046 // the user didn't explicitly ask for something different.
1047 if (!this->user_set_define_common())
1048 this->set_define_common(!this->relocatable());
1050 // execstack_status_ is a three-state variable; update it based on
1051 // -z [no]execstack.
1052 if (this->execstack())
1053 this->set_execstack_status(EXECSTACK_YES
);
1054 else if (this->noexecstack())
1055 this->set_execstack_status(EXECSTACK_NO
);
1057 // icf_status_ is a three-state variable; update it based on the
1058 // value of this->icf().
1059 if (strcmp(this->icf(), "none") == 0)
1060 this->set_icf_status(ICF_NONE
);
1061 else if (strcmp(this->icf(), "safe") == 0)
1062 this->set_icf_status(ICF_SAFE
);
1064 this->set_icf_status(ICF_ALL
);
1066 // Handle the optional argument for --demangle.
1067 if (this->user_set_demangle())
1069 this->set_do_demangle(true);
1070 const char* style
= this->demangle();
1073 enum demangling_styles style_code
;
1075 style_code
= cplus_demangle_name_to_style(style
);
1076 if (style_code
== unknown_demangling
)
1077 gold_fatal("unknown demangling style '%s'", style
);
1078 cplus_demangle_set_style(style_code
);
1081 else if (this->user_set_no_demangle())
1082 this->set_do_demangle(false);
1085 // Testing COLLECT_NO_DEMANGLE makes our default demangling
1086 // behaviour identical to that of gcc's linker wrapper.
1087 this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL
);
1090 // -M is equivalent to "-Map -".
1091 if (this->print_map() && !this->user_set_Map())
1094 this->set_user_set_Map();
1097 // Using -n or -N implies -static.
1098 if (this->nmagic() || this->omagic())
1099 this->set_static(true);
1101 // If --thread_count is specified, it applies to
1102 // --thread-count-{initial,middle,final}, though it doesn't override
1104 if (this->thread_count() > 0 && this->thread_count_initial() == 0)
1105 this->set_thread_count_initial(this->thread_count());
1106 if (this->thread_count() > 0 && this->thread_count_middle() == 0)
1107 this->set_thread_count_middle(this->thread_count());
1108 if (this->thread_count() > 0 && this->thread_count_final() == 0)
1109 this->set_thread_count_final(this->thread_count());
1111 // Let's warn if you set the thread-count but we're going to ignore it.
1112 #ifndef ENABLE_THREADS
1113 if (this->threads())
1115 gold_warning(_("ignoring --threads: "
1116 "%s was compiled without thread support"),
1118 this->set_threads(false);
1120 if (this->thread_count() > 0 || this->thread_count_initial() > 0
1121 || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
1122 gold_warning(_("ignoring --thread-count: "
1123 "%s was compiled without thread support"),
1127 std::string libpath
;
1128 if (this->user_set_Y())
1130 libpath
= this->Y();
1131 if (libpath
.compare(0, 2, "P,") == 0)
1132 libpath
.erase(0, 2);
1134 else if (!this->nostdlib())
1136 #ifndef NATIVE_LINKER
1137 #define NATIVE_LINKER 0
1139 const char* p
= LIB_PATH
;
1140 if (strcmp(p
, "::DEFAULT::") != 0)
1142 else if (NATIVE_LINKER
1143 || this->user_set_sysroot()
1144 || *TARGET_SYSTEM_ROOT
!= '\0')
1146 this->add_to_library_path_with_sysroot("/lib");
1147 this->add_to_library_path_with_sysroot("/usr/lib");
1150 this->add_to_library_path_with_sysroot(TOOLLIBDIR
);
1153 if (!libpath
.empty())
1159 next_pos
= libpath
.find(':', pos
);
1160 size_t len
= (next_pos
== std::string::npos
1164 this->add_to_library_path_with_sysroot(libpath
.substr(pos
, len
));
1167 while (next_pos
!= std::string::npos
);
1170 // Parse the contents of -retain-symbols-file into a set.
1171 if (this->retain_symbols_file())
1174 in
.open(this->retain_symbols_file());
1176 gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
1177 this->retain_symbols_file(), strerror(errno
));
1179 std::getline(in
, line
); // this chops off the trailing \n, if any
1182 if (!line
.empty() && line
[line
.length() - 1] == '\r') // Windows
1183 line
.resize(line
.length() - 1);
1184 this->symbols_to_retain_
.insert(line
);
1185 std::getline(in
, line
);
1189 // -Bgroup implies --unresolved-symbols=report-all.
1190 if (this->Bgroup() && !this->user_set_unresolved_symbols())
1191 this->set_unresolved_symbols("report-all");
1193 // -shared implies --allow-shlib-undefined. Currently
1194 // ---allow-shlib-undefined controls warnings issued based on the
1195 // -symbol table. --unresolved-symbols controls warnings issued
1196 // -based on relocations.
1197 if (this->shared() && !this->user_set_allow_shlib_undefined())
1198 this->set_allow_shlib_undefined(true);
1200 // Normalize library_path() by adding the sysroot to all directories
1201 // in the path, as appropriate.
1202 this->add_sysroot();
1204 // --dynamic-list overrides -Bsymbolic and -Bsymbolic-functions.
1205 if (this->have_dynamic_list())
1207 this->set_Bsymbolic(false);
1208 this->set_Bsymbolic_functions(false);
1211 // Now that we've normalized the options, check for contradictory ones.
1212 if (this->shared() && this->is_static())
1213 gold_fatal(_("-shared and -static are incompatible"));
1214 if (this->shared() && this->pie())
1215 gold_fatal(_("-shared and -pie are incompatible"));
1216 if (this->pie() && this->is_static())
1217 gold_fatal(_("-pie and -static are incompatible"));
1219 if (this->shared() && this->relocatable())
1220 gold_fatal(_("-shared and -r are incompatible"));
1221 if (this->pie() && this->relocatable())
1222 gold_fatal(_("-pie and -r are incompatible"));
1224 if (!this->shared())
1226 if (this->filter() != NULL
)
1227 gold_fatal(_("-F/--filter may not used without -shared"));
1228 if (this->any_auxiliary())
1229 gold_fatal(_("-f/--auxiliary may not be used without -shared"));
1232 // TODO: implement support for -retain-symbols-file with -r, if needed.
1233 if (this->relocatable() && this->retain_symbols_file())
1234 gold_fatal(_("-retain-symbols-file does not yet work with -r"));
1236 if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
1239 || this->relocatable()))
1240 gold_fatal(_("binary output format not compatible "
1241 "with -shared or -pie or -r"));
1243 if (this->user_set_hash_bucket_empty_fraction()
1244 && (this->hash_bucket_empty_fraction() < 0.0
1245 || this->hash_bucket_empty_fraction() >= 1.0))
1246 gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
1248 this->hash_bucket_empty_fraction());
1250 if (this->implicit_incremental_
&& this->incremental_mode_
== INCREMENTAL_OFF
)
1251 gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
1252 "--incremental-unknown require the use of --incremental"));
1254 // Check for options that are not compatible with incremental linking.
1255 // Where an option can be disabled without seriously changing the semantics
1256 // of the link, we turn the option off; otherwise, we issue a fatal error.
1258 if (this->incremental_mode_
!= INCREMENTAL_OFF
)
1260 if (this->relocatable())
1261 gold_fatal(_("incremental linking is not compatible with -r"));
1262 if (this->emit_relocs())
1263 gold_fatal(_("incremental linking is not compatible with "
1265 if (this->has_plugins())
1266 gold_fatal(_("incremental linking is not compatible with --plugin"));
1267 if (this->gc_sections())
1269 gold_warning(_("ignoring --gc-sections for an incremental link"));
1270 this->set_gc_sections(false);
1272 if (this->icf_enabled())
1274 gold_warning(_("ignoring --icf for an incremental link"));
1275 this->set_icf_status(ICF_NONE
);
1277 if (strcmp(this->compress_debug_sections(), "none") != 0)
1279 gold_warning(_("ignoring --compress-debug-sections for an "
1280 "incremental link"));
1281 this->set_compress_debug_sections("none");
1285 // --rosegment-gap implies --rosegment.
1286 if (this->user_set_rosegment_gap())
1287 this->set_rosegment(true);
1289 // FIXME: we can/should be doing a lot more sanity checking here.
1292 // Search_directory methods.
1294 // This is called if we have a sysroot. Apply the sysroot if
1295 // appropriate. Record whether the directory is in the sysroot.
1298 Search_directory::add_sysroot(const char* sysroot
,
1299 const char* canonical_sysroot
)
1301 gold_assert(*sysroot
!= '\0');
1302 if (this->put_in_sysroot_
)
1304 if (!IS_DIR_SEPARATOR(this->name_
[0])
1305 && !IS_DIR_SEPARATOR(sysroot
[strlen(sysroot
) - 1]))
1306 this->name_
= '/' + this->name_
;
1307 this->name_
= sysroot
+ this->name_
;
1308 this->is_in_sysroot_
= true;
1312 // Check whether this entry is in the sysroot. To do this
1313 // correctly, we need to use canonical names. Otherwise we will
1314 // get confused by the ../../.. paths that gcc tends to use.
1315 char* canonical_name
= lrealpath(this->name_
.c_str());
1316 int canonical_name_len
= strlen(canonical_name
);
1317 int canonical_sysroot_len
= strlen(canonical_sysroot
);
1318 if (canonical_name_len
> canonical_sysroot_len
1319 && IS_DIR_SEPARATOR(canonical_name
[canonical_sysroot_len
]))
1321 canonical_name
[canonical_sysroot_len
] = '\0';
1322 if (FILENAME_CMP(canonical_name
, canonical_sysroot
) == 0)
1323 this->is_in_sysroot_
= true;
1325 free(canonical_name
);
1329 // Input_arguments methods.
1331 // Add a file to the list.
1334 Input_arguments::add_file(Input_file_argument
& file
)
1336 file
.set_arg_serial(++this->file_count_
);
1337 if (this->in_group_
)
1339 gold_assert(!this->input_argument_list_
.empty());
1340 gold_assert(this->input_argument_list_
.back().is_group());
1341 return this->input_argument_list_
.back().group()->add_file(file
);
1345 gold_assert(!this->input_argument_list_
.empty());
1346 gold_assert(this->input_argument_list_
.back().is_lib());
1347 return this->input_argument_list_
.back().lib()->add_file(file
);
1349 this->input_argument_list_
.push_back(Input_argument(file
));
1350 return this->input_argument_list_
.back();
1356 Input_arguments::start_group()
1358 if (this->in_group_
)
1359 gold_fatal(_("May not nest groups"));
1361 gold_fatal(_("may not nest groups in libraries"));
1362 Input_file_group
* group
= new Input_file_group();
1363 this->input_argument_list_
.push_back(Input_argument(group
));
1364 this->in_group_
= true;
1370 Input_arguments::end_group()
1372 if (!this->in_group_
)
1373 gold_fatal(_("Group end without group start"));
1374 this->in_group_
= false;
1380 Input_arguments::start_lib(const Position_dependent_options
& options
)
1383 gold_fatal(_("may not nest libraries"));
1384 if (this->in_group_
)
1385 gold_fatal(_("may not nest libraries in groups"));
1386 Input_file_lib
* lib
= new Input_file_lib(options
);
1387 this->input_argument_list_
.push_back(Input_argument(lib
));
1388 this->in_lib_
= true;
1394 Input_arguments::end_lib()
1397 gold_fatal(_("lib end without lib start"));
1398 this->in_lib_
= false;
1401 // Command_line options.
1403 Command_line::Command_line()
1407 // Pre_options is the hook that sets the ready_to_register flag.
1409 Command_line::Pre_options::Pre_options()
1411 gold::options::ready_to_register
= true;
1414 // Process the command line options. For process_one_option, i is the
1415 // index of argv to process next, and must be an option (that is,
1416 // start with a dash). The return value is the index of the next
1417 // option to process (i+1 or i+2, or argc to indicate processing is
1418 // done). no_more_options is set to true if (and when) "--" is seen
1422 Command_line::process_one_option(int argc
, const char** argv
, int i
,
1423 bool* no_more_options
)
1425 gold_assert(argv
[i
][0] == '-' && !(*no_more_options
));
1427 // If we are reading "--", then just set no_more_options and return.
1428 if (argv
[i
][1] == '-' && argv
[i
][2] == '\0')
1430 *no_more_options
= true;
1435 options::One_option
* option
= NULL
;
1436 const char* arg
= NULL
;
1438 // First, try to process argv as a long option.
1439 option
= parse_long_option(argc
, argv
, false, &arg
, &new_i
);
1442 option
->reader
->parse_to_value(argv
[i
], arg
, this, &this->options_
);
1446 // Now, try to process argv as a short option. Since several short
1447 // options can be combined in one argv, we may have to parse a lot
1448 // until we're done reading this argv.
1449 int pos_in_argv_i
= 1;
1452 option
= parse_short_option(argc
, argv
, pos_in_argv_i
, &arg
, &new_i
);
1455 option
->reader
->parse_to_value(argv
[i
], arg
, this, &this->options_
);
1461 // I guess it's neither a long option nor a short option.
1462 usage(_("unknown option"), argv
[i
]);
1468 Command_line::process(int argc
, const char** argv
)
1470 bool no_more_options
= false;
1474 this->position_options_
.copy_from_options(this->options());
1475 if (no_more_options
|| argv
[i
][0] != '-')
1477 Input_file_argument
file(argv
[i
],
1478 Input_file_argument::INPUT_FILE_TYPE_FILE
,
1479 "", false, this->position_options_
);
1480 this->inputs_
.add_file(file
);
1484 i
= process_one_option(argc
, argv
, i
, &no_more_options
);
1487 if (this->inputs_
.in_group())
1489 fprintf(stderr
, _("%s: missing group end\n"), program_name
);
1493 // Normalize the options and ensure they don't contradict each other.
1494 this->options_
.finalize();
1497 // Finalize the version script options and return them.
1499 const Version_script_info
&
1500 Command_line::version_script()
1502 this->options_
.finalize_dynamic_list();
1503 Version_script_info
* vsi
= this->script_options_
.version_script_info();
1508 } // End namespace gold.