From Craig Silverstein: Have Parameters point to General_options.
[binutils-gdb.git] / gold / options.h
1 // options.h -- handle command line options for gold -*- C++ -*-
2
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
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
23 // Command_line
24 // Holds everything we get from the command line.
25 // General_options (from Command_line::options())
26 // Options which are not position dependent.
27 // Input_argument (from Command_line::inputs())
28 // The list of input files, including -l options.
29 // Position_dependent_options (from Input_argument::options())
30 // Position dependent options which apply to this argument.
31
32 #ifndef GOLD_OPTIONS_H
33 #define GOLD_OPTIONS_H
34
35 #include <cstdlib>
36 #include <list>
37 #include <string>
38 #include <vector>
39
40 #include "elfcpp.h"
41 #include "script.h"
42
43 namespace gold
44 {
45
46 class Command_line;
47 class Input_file_group;
48 class Position_dependent_options;
49 class Target;
50
51 namespace options
52 {
53
54 class Command_line_options;
55 struct One_option;
56 struct One_z_option;
57 struct One_debug_option;
58
59 } // End namespace gold::options.
60
61 // A directory to search. For each directory we record whether it is
62 // in the sysroot. We need to know this so that, if a linker script
63 // is found within the sysroot, we will apply the sysroot to any files
64 // named by that script.
65
66 class Search_directory
67 {
68 public:
69 // We need a default constructor because we put this in a
70 // std::vector.
71 Search_directory()
72 : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
73 { }
74
75 // This is the usual constructor.
76 Search_directory(const char* name, bool put_in_sysroot)
77 : name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
78 {
79 if (this->name_.empty())
80 this->name_ = ".";
81 }
82
83 // This is called if we have a sysroot. The sysroot is prefixed to
84 // any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
85 // set to true for any enries which are in the sysroot (this will
86 // naturally include any entries for which put_in_sysroot_ is true).
87 // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
88 // passing SYSROOT to lrealpath.
89 void
90 add_sysroot(const char* sysroot, const char* canonical_sysroot);
91
92 // Get the directory name.
93 const std::string&
94 name() const
95 { return this->name_; }
96
97 // Return whether this directory is in the sysroot.
98 bool
99 is_in_sysroot() const
100 { return this->is_in_sysroot_; }
101
102 private:
103 std::string name_;
104 bool put_in_sysroot_;
105 bool is_in_sysroot_;
106 };
107
108 // The position independent options which apply to the whole link.
109 // There are a lot of them.
110
111 class General_options
112 {
113 public:
114 enum Object_format
115 {
116 // Ordinary ELF.
117 OBJECT_FORMAT_ELF,
118 // Straight binary format.
119 OBJECT_FORMAT_BINARY
120 };
121
122 General_options();
123
124 // -e: set entry address.
125 const char*
126 entry() const
127 { return this->entry_; }
128
129 // -E: export dynamic symbols.
130 bool
131 export_dynamic() const
132 { return this->export_dynamic_; }
133
134 // -h: shared library name.
135 const char*
136 soname() const
137 { return this->soname_; }
138
139 // -I: dynamic linker name.
140 const char*
141 dynamic_linker() const
142 { return this->dynamic_linker_; }
143
144 // -L: Library search path.
145 typedef std::vector<Search_directory> Dir_list;
146
147 const Dir_list&
148 search_path() const
149 { return this->search_path_; }
150
151 // -O: optimization level (0: don't try to optimize output size).
152 int
153 optimize() const
154 { return this->optimization_level_; }
155
156 // -o: Output file name.
157 const char*
158 output_file_name() const
159 { return this->output_file_name_; }
160
161 // --oformat: Output format.
162 Object_format
163 oformat() const
164 { return this->oformat_; }
165
166 const char*
167 oformat_string() const
168 { return this->oformat_string_; }
169
170 // Return the default target.
171 Target*
172 default_target() const;
173
174 // -q: Whether to emit relocations.
175 bool
176 emit_relocs() const
177 { return this->emit_relocs_; }
178
179 // -r: Whether we are doing a relocatable link.
180 bool
181 relocatable() const
182 { return this->is_relocatable_; }
183
184 // -s: Strip all symbols.
185 bool
186 strip_all() const
187 { return this->strip_ == STRIP_ALL; }
188
189 // -S: Strip debugging information.
190 bool
191 strip_debug() const
192 { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
193
194 // --strip-debug-gdb: strip only debugging information that's not
195 // used by gdb (at least, for gdb versions <= 6.7).
196 bool
197 strip_debug_gdb() const
198 { return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB; }
199
200 // --allow-shlib-undefined: do not warn about unresolved symbols in
201 // --shared libraries.
202 bool
203 allow_shlib_undefined() const
204 { return this->allow_shlib_undefined_; }
205
206 // -Bsymbolic: bind defined symbols locally.
207 bool
208 Bsymbolic() const
209 { return this->symbolic_; }
210
211 // --compress-debug-sections: compress .debug_* sections in the
212 // output file using the given compression method. This is useful
213 // when the tools (such as gdb) support compressed sections.
214 bool
215 compress_debug_sections() const
216 { return this->compress_debug_sections_ != NO_COMPRESSION; }
217
218 bool
219 zlib_compress_debug_sections() const
220 { return this->compress_debug_sections_ == ZLIB_COMPRESSION; }
221
222 // --demangle: demangle C++ symbols in our log messages.
223 bool
224 demangle() const
225 { return this->demangle_; }
226
227 // --detect-odr-violations: Whether to search for One Defn Rule violations.
228 bool
229 detect_odr_violations() const
230 { return this->detect_odr_violations_; }
231
232 // --eh-frame-hdr: Whether to generate an exception frame header.
233 bool
234 eh_frame_hdr() const
235 { return this->create_eh_frame_hdr_; }
236
237 // --rpath: The runtime search path.
238 const Dir_list&
239 rpath() const
240 { return this->rpath_; }
241
242 // --rpath-link: The link time search patch for shared libraries.
243 const Dir_list&
244 rpath_link() const
245 { return this->rpath_link_; }
246
247 // --shared: Whether generating a shared object.
248 bool
249 shared() const
250 { return this->is_shared_; }
251
252 // This is not defined via a flag, but combines flags to say whether
253 // the output is position-independent or not.
254 bool
255 output_is_position_independent() const
256 { return this->shared(); }
257
258 // --static: Whether doing a static link.
259 bool
260 is_static() const
261 { return this->is_static_; }
262
263 // --stats: Print resource usage statistics.
264 bool
265 print_stats() const
266 { return this->print_stats_; }
267
268 // --sysroot: The system root of a cross-linker.
269 const std::string&
270 sysroot() const
271 { return this->sysroot_; }
272
273 // -Tbss: The address of the BSS segment
274 uint64_t
275 Tbss() const
276 { return this->bss_segment_address_; }
277
278 // Whether -Tbss was used.
279 bool
280 user_set_Tbss() const
281 { return this->bss_segment_address_ != -1U; }
282
283 // -Tdata: The address of the data segment
284 uint64_t
285 Tdata() const
286 { return this->data_segment_address_; }
287
288 // Whether -Tdata was used.
289 bool
290 user_set_Tdata() const
291 { return this->data_segment_address_ != -1U; }
292
293 // -Ttext: The address of the .text section
294 uint64_t
295 Ttext() const
296 { return this->text_segment_address_; }
297
298 // Whether -Ttext was used.
299 bool
300 user_set_Ttext() const
301 { return this->text_segment_address_ != -1U; }
302
303 // --threads: Whether to use threads.
304 bool
305 threads() const
306 { return this->threads_; }
307
308 // --thread-count-initial: Threads to use in initial pass.
309 int
310 thread_count_initial() const
311 { return this->thread_count_initial_; }
312
313 // --thread-count-middle: Threads to use in middle pass.
314 int
315 thread_count_middle() const
316 { return this->thread_count_middle_; }
317
318 // --thread-count-final: Threads to use in final pass.
319 int
320 thread_count_final() const
321 { return this->thread_count_final_; }
322
323 // -z execstack, -z noexecstack
324 bool
325 is_execstack_set() const
326 { return this->execstack_ != EXECSTACK_FROM_INPUT; }
327
328 bool
329 is_stack_executable() const
330 { return this->execstack_ == EXECSTACK_YES; }
331
332 // -z max-page-size
333 uint64_t
334 max_page_size() const
335 { return this->max_page_size_; }
336
337 // -z common-page-size
338 uint64_t
339 common_page_size() const
340 { return this->common_page_size_; }
341
342 // --debug
343 unsigned int
344 debug() const
345 { return this->debug_; }
346
347 private:
348 // Don't copy this structure.
349 General_options(const General_options&);
350 General_options& operator=(const General_options&);
351
352 friend class Command_line;
353 friend class options::Command_line_options;
354
355 // Which symbols to strip.
356 enum Strip
357 {
358 // Don't strip any symbols.
359 STRIP_NONE,
360 // Strip all symbols.
361 STRIP_ALL,
362 // Strip debugging information.
363 STRIP_DEBUG,
364 // Strip debugging information that's not used by gdb (at least <= 6.7)
365 STRIP_DEBUG_UNUSED_BY_GDB
366 };
367
368 // Whether to mark the stack as executable.
369 enum Execstack
370 {
371 // Not set on command line.
372 EXECSTACK_FROM_INPUT,
373 // Mark the stack as executable.
374 EXECSTACK_YES,
375 // Mark the stack as not executable.
376 EXECSTACK_NO
377 };
378
379 // What compression method to use
380 enum CompressionMethod
381 {
382 NO_COMPRESSION,
383 ZLIB_COMPRESSION,
384 };
385
386 void
387 set_entry(const char* arg)
388 { this->entry_ = arg; }
389
390 void
391 set_export_dynamic(bool value)
392 { this->export_dynamic_ = value; }
393
394 void
395 set_soname(const char* arg)
396 { this->soname_ = arg; }
397
398 void
399 set_dynamic_linker(const char* arg)
400 { this->dynamic_linker_ = arg; }
401
402 void
403 add_to_search_path(const char* arg)
404 { this->search_path_.push_back(Search_directory(arg, false)); }
405
406 void
407 add_to_search_path_with_sysroot(const char* arg)
408 { this->search_path_.push_back(Search_directory(arg, true)); }
409
410 void
411 set_optimize(const char* arg)
412 {
413 char* endptr;
414 this->optimization_level_ = strtol(arg, &endptr, 0);
415 if (*endptr != '\0' || this->optimization_level_ < 0)
416 gold_fatal(_("invalid optimization level: %s"), arg);
417 }
418
419 void
420 set_output(const char* arg)
421 { this->output_file_name_ = arg; }
422
423 void
424 set_oformat(const char*);
425
426 void
427 set_emit_relocs(bool value)
428 { this->emit_relocs_ = value; }
429
430 void
431 set_relocatable(bool value)
432 { this->is_relocatable_ = value; }
433
434 void
435 set_strip_all(bool)
436 { this->strip_ = STRIP_ALL; }
437
438 // Note: normalize_options() depends on the fact that this turns off
439 // STRIP_ALL if it were already set.
440 void
441 set_strip_debug(bool)
442 { this->strip_ = STRIP_DEBUG; }
443
444 void
445 set_strip_debug_gdb(bool)
446 { this->strip_ = STRIP_DEBUG_UNUSED_BY_GDB; }
447
448 void
449 set_allow_shlib_undefined(bool value)
450 { this->allow_shlib_undefined_ = value; }
451
452 void
453 set_no_allow_shlib_undefined(bool value)
454 { this->set_allow_shlib_undefined(!value); }
455
456 void
457 set_Bsymbolic(bool value)
458 { this->symbolic_ = value; }
459
460 void set_compress_debug_sections(const char* arg)
461 {
462 if (strcmp(arg, "none") == 0)
463 this->compress_debug_sections_ = NO_COMPRESSION;
464 #ifdef HAVE_ZLIB_H
465 else if (strcmp(arg, "zlib") == 0)
466 this->compress_debug_sections_ = ZLIB_COMPRESSION;
467 #endif
468 else
469 gold_fatal(_("unsupported argument to --compress-debug-sections: %s"),
470 arg);
471 }
472
473 void
474 add_to_defsym(const char* arg);
475
476 void
477 set_demangle(bool value)
478 { this->demangle_ = value; }
479
480 void
481 set_no_demangle(bool value)
482 { this->set_demangle(!value); }
483
484 void
485 set_detect_odr_violations(bool value)
486 { this->detect_odr_violations_ = value; }
487
488 void
489 set_eh_frame_hdr(bool value)
490 { this->create_eh_frame_hdr_ = value; }
491
492 void
493 add_to_rpath(const char* arg)
494 { this->rpath_.push_back(Search_directory(arg, false)); }
495
496 void
497 add_to_rpath_link(const char* arg)
498 { this->rpath_link_.push_back(Search_directory(arg, false)); }
499
500 void
501 set_shared(bool value)
502 { this->is_shared_ = value; }
503
504 void
505 set_static(bool value)
506 { this->is_static_ = value; }
507
508 void
509 set_stats(bool value)
510 { this->print_stats_ = value; }
511
512 void
513 set_sysroot(const char* arg)
514 { this->sysroot_ = arg; }
515
516 void
517 set_segment_address(const char* name, const char* arg, uint64_t* val)
518 {
519 char* endptr;
520 *val = strtoull(arg, &endptr, 0);
521 if (*endptr != '\0' || *val == -1U)
522 gold_fatal(_("invalid argument to %s: %s"), name, arg);
523 }
524
525 void
526 set_Tbss(const char* arg)
527 { this->set_segment_address("-Tbss", arg, &this->bss_segment_address_); }
528
529 void
530 set_Tdata(const char* arg)
531 { this->set_segment_address("-Tdata", arg, &this->data_segment_address_); }
532
533 void
534 set_Ttext(const char* arg)
535 { this->set_segment_address("-Ttext", arg, &this->text_segment_address_); }
536
537 int
538 parse_thread_count(const char* arg)
539 {
540 char* endptr;
541 const int count = strtol(arg, &endptr, 0);
542 if (*endptr != '\0' || count < 0)
543 gold_fatal(_("invalid thread count: %s"), arg);
544 return count;
545 }
546
547 void
548 set_threads(bool value)
549 {
550 #ifndef ENABLE_THREADS
551 if (value)
552 gold_fatal(_("--threads not supported"));
553 #endif
554 this->threads_ = value;
555 }
556
557 void
558 set_no_threads(bool value)
559 { this->set_threads(!value); }
560
561 void
562 set_thread_count(const char* arg)
563 {
564 int count = this->parse_thread_count(arg);
565 this->thread_count_initial_ = count;
566 this->thread_count_middle_ = count;
567 this->thread_count_final_ = count;
568 }
569
570 void
571 set_thread_count_initial(const char* arg)
572 { this->thread_count_initial_ = this->parse_thread_count(arg); }
573
574 void
575 set_thread_count_middle(const char* arg)
576 { this->thread_count_middle_ = this->parse_thread_count(arg); }
577
578 void
579 set_thread_count_final(const char* arg)
580 { this->thread_count_final_ = this->parse_thread_count(arg); }
581
582 void
583 ignore(const char*)
584 { }
585
586 void
587 set_execstack(bool)
588 { this->execstack_ = EXECSTACK_YES; }
589
590 void
591 set_noexecstack(bool)
592 { this->execstack_ = EXECSTACK_NO; }
593
594 void
595 set_max_page_size(const char* arg)
596 {
597 char* endptr;
598 this->max_page_size_ = strtoull(arg, &endptr, 0);
599 if (*endptr != '\0' || this->max_page_size_ == 0)
600 gold_fatal(_("invalid max-page-size: %s"), arg);
601 }
602
603 void
604 set_common_page_size(const char* arg)
605 {
606 char* endptr;
607 this->common_page_size_ = strtoull(arg, &endptr, 0);
608 if (*endptr != '\0' || this->common_page_size_ == 0)
609 gold_fatal(_("invalid common-page-size: %s"), arg);
610 }
611
612 void
613 set_debug(unsigned int flags)
614 { this->debug_ = flags; }
615
616 // Handle the -z option.
617 void
618 handle_z_option(const char*);
619
620 // Handle the --debug option.
621 void
622 handle_debug_option(const char*);
623
624 // Apply any sysroot to the directory lists.
625 void
626 add_sysroot();
627
628 const char* entry_;
629 bool export_dynamic_;
630 const char* soname_;
631 const char* dynamic_linker_;
632 Dir_list search_path_;
633 int optimization_level_;
634 const char* output_file_name_;
635 Object_format oformat_;
636 const char* oformat_string_;
637 bool emit_relocs_;
638 bool is_relocatable_;
639 Strip strip_;
640 bool allow_shlib_undefined_;
641 bool symbolic_;
642 CompressionMethod compress_debug_sections_;
643 bool demangle_;
644 bool detect_odr_violations_;
645 bool create_eh_frame_hdr_;
646 Dir_list rpath_;
647 Dir_list rpath_link_;
648 bool is_shared_;
649 bool is_static_;
650 bool print_stats_;
651 std::string sysroot_;
652 uint64_t bss_segment_address_;
653 uint64_t data_segment_address_;
654 uint64_t text_segment_address_;
655 bool threads_;
656 int thread_count_initial_;
657 int thread_count_middle_;
658 int thread_count_final_;
659 Execstack execstack_;
660 uint64_t max_page_size_;
661 uint64_t common_page_size_;
662 unsigned int debug_;
663 };
664
665 // The current state of the position dependent options.
666
667 class Position_dependent_options
668 {
669 public:
670 typedef General_options::Object_format Object_format;
671
672 Position_dependent_options();
673
674 // -Bdynamic/-Bstatic: Whether we are searching for a static archive
675 // -rather than a shared object.
676 bool
677 Bstatic() const
678 { return this->do_static_search_; }
679
680 // --as-needed: Whether to add a DT_NEEDED argument only if the
681 // dynamic object is used.
682 bool
683 as_needed() const
684 { return this->as_needed_; }
685
686 // --whole-archive: Whether to include the entire contents of an
687 // --archive.
688 bool
689 whole_archive() const
690 { return this->include_whole_archive_; }
691
692 // --format: The format of the input file.
693 Object_format
694 format() const
695 { return this->input_format_; }
696
697 void
698 set_Bstatic(bool value)
699 { this->do_static_search_ = value; }
700
701 void
702 set_Bdynamic(bool value)
703 { this->set_Bstatic(!value); }
704
705 void
706 set_as_needed(bool value)
707 { this->as_needed_ = value; }
708
709 void
710 set_no_as_needed(bool value)
711 { this->set_as_needed(!value); }
712
713 void
714 set_whole_archive(bool value)
715 { this->include_whole_archive_ = value; }
716
717 void
718 set_no_whole_archive(bool value)
719 { this->set_whole_archive(!value); }
720
721 void
722 set_format(const char*);
723
724 private:
725 bool do_static_search_;
726 bool as_needed_;
727 bool include_whole_archive_;
728 Object_format input_format_;
729 };
730
731 // A single file or library argument from the command line.
732
733 class Input_file_argument
734 {
735 public:
736 // name: file name or library name
737 // is_lib: true if name is a library name: that is, emits the leading
738 // "lib" and trailing ".so"/".a" from the name
739 // extra_search_path: an extra directory to look for the file, prior
740 // to checking the normal library search path. If this is "",
741 // then no extra directory is added.
742 // just_symbols: whether this file only defines symbols.
743 // options: The position dependent options at this point in the
744 // command line, such as --whole-archive.
745 Input_file_argument()
746 : name_(), is_lib_(false), extra_search_path_(""), just_symbols_(false),
747 options_()
748 { }
749
750 Input_file_argument(const char* name, bool is_lib,
751 const char* extra_search_path,
752 bool just_symbols,
753 const Position_dependent_options& options)
754 : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
755 just_symbols_(just_symbols), options_(options)
756 { }
757
758 const char*
759 name() const
760 { return this->name_.c_str(); }
761
762 const Position_dependent_options&
763 options() const
764 { return this->options_; }
765
766 bool
767 is_lib() const
768 { return this->is_lib_; }
769
770 const char*
771 extra_search_path() const
772 {
773 return (this->extra_search_path_.empty()
774 ? NULL
775 : this->extra_search_path_.c_str());
776 }
777
778 // Return whether we should only read symbols from this file.
779 bool
780 just_symbols() const
781 { return this->just_symbols_; }
782
783 // Return whether this file may require a search using the -L
784 // options.
785 bool
786 may_need_search() const
787 { return this->is_lib_ || !this->extra_search_path_.empty(); }
788
789 private:
790 // We use std::string, not const char*, here for convenience when
791 // using script files, so that we do not have to preserve the string
792 // in that case.
793 std::string name_;
794 bool is_lib_;
795 std::string extra_search_path_;
796 bool just_symbols_;
797 Position_dependent_options options_;
798 };
799
800 // A file or library, or a group, from the command line.
801
802 class Input_argument
803 {
804 public:
805 // Create a file or library argument.
806 explicit Input_argument(Input_file_argument file)
807 : is_file_(true), file_(file), group_(NULL)
808 { }
809
810 // Create a group argument.
811 explicit Input_argument(Input_file_group* group)
812 : is_file_(false), group_(group)
813 { }
814
815 // Return whether this is a file.
816 bool
817 is_file() const
818 { return this->is_file_; }
819
820 // Return whether this is a group.
821 bool
822 is_group() const
823 { return !this->is_file_; }
824
825 // Return the information about the file.
826 const Input_file_argument&
827 file() const
828 {
829 gold_assert(this->is_file_);
830 return this->file_;
831 }
832
833 // Return the information about the group.
834 const Input_file_group*
835 group() const
836 {
837 gold_assert(!this->is_file_);
838 return this->group_;
839 }
840
841 Input_file_group*
842 group()
843 {
844 gold_assert(!this->is_file_);
845 return this->group_;
846 }
847
848 private:
849 bool is_file_;
850 Input_file_argument file_;
851 Input_file_group* group_;
852 };
853
854 // A group from the command line. This is a set of arguments within
855 // --start-group ... --end-group.
856
857 class Input_file_group
858 {
859 public:
860 typedef std::vector<Input_argument> Files;
861 typedef Files::const_iterator const_iterator;
862
863 Input_file_group()
864 : files_()
865 { }
866
867 // Add a file to the end of the group.
868 void
869 add_file(const Input_file_argument& arg)
870 { this->files_.push_back(Input_argument(arg)); }
871
872 // Iterators to iterate over the group contents.
873
874 const_iterator
875 begin() const
876 { return this->files_.begin(); }
877
878 const_iterator
879 end() const
880 { return this->files_.end(); }
881
882 private:
883 Files files_;
884 };
885
886 // A list of files from the command line or a script.
887
888 class Input_arguments
889 {
890 public:
891 typedef std::vector<Input_argument> Input_argument_list;
892 typedef Input_argument_list::const_iterator const_iterator;
893
894 Input_arguments()
895 : input_argument_list_(), in_group_(false)
896 { }
897
898 // Add a file.
899 void
900 add_file(const Input_file_argument& arg);
901
902 // Start a group (the --start-group option).
903 void
904 start_group();
905
906 // End a group (the --end-group option).
907 void
908 end_group();
909
910 // Return whether we are currently in a group.
911 bool
912 in_group() const
913 { return this->in_group_; }
914
915 // The number of entries in the list.
916 int
917 size() const
918 { return this->input_argument_list_.size(); }
919
920 // Iterators to iterate over the list of input files.
921
922 const_iterator
923 begin() const
924 { return this->input_argument_list_.begin(); }
925
926 const_iterator
927 end() const
928 { return this->input_argument_list_.end(); }
929
930 // Return whether the list is empty.
931 bool
932 empty() const
933 { return this->input_argument_list_.empty(); }
934
935 private:
936 Input_argument_list input_argument_list_;
937 bool in_group_;
938 };
939
940 // All the information read from the command line.
941
942 class Command_line
943 {
944 public:
945 typedef Input_arguments::const_iterator const_iterator;
946
947 Command_line();
948
949 // Process the command line options. This will exit with an
950 // appropriate error message if an unrecognized option is seen.
951 void
952 process(int argc, char** argv);
953
954 // Process one command-line option. This takes the index of argv to
955 // process, and returns the index for the next option.
956 int
957 process_one_option(int argc, char** argv, int i, bool* no_more_options);
958
959 // Handle a -l option.
960 int
961 process_l_option(int, char**, char*, bool);
962
963 // Handle a -R option when it means --rpath.
964 void
965 add_to_rpath(const char* arg)
966 { this->options_.add_to_rpath(arg); }
967
968 // Add a file for which we just read the symbols.
969 void
970 add_just_symbols_file(const char* arg)
971 {
972 this->inputs_.add_file(Input_file_argument(arg, false, "", true,
973 this->position_options_));
974 }
975
976 // Handle a --start-group option.
977 void
978 start_group(const char* arg);
979
980 // Handle a --end-group option.
981 void
982 end_group(const char* arg);
983
984 // Get an option argument--a helper function for special processing.
985 const char*
986 get_special_argument(const char* longname, int argc, char** argv,
987 const char* arg, bool long_option,
988 int *pret);
989
990 // Get the general options.
991 const General_options&
992 options() const
993 { return this->options_; }
994
995 // Get the position dependent options.
996 const Position_dependent_options&
997 position_dependent_options() const
998 { return this->position_options_; }
999
1000 // Get the linker-script options.
1001 Script_options&
1002 script_options()
1003 { return this->script_options_; }
1004
1005 // Get the version-script options: a convenience routine.
1006 const Version_script_info&
1007 version_script() const
1008 { return *this->script_options_.version_script_info(); }
1009
1010 // The number of input files.
1011 int
1012 number_of_input_files() const
1013 { return this->inputs_.size(); }
1014
1015 // Iterators to iterate over the list of input files.
1016
1017 const_iterator
1018 begin() const
1019 { return this->inputs_.begin(); }
1020
1021 const_iterator
1022 end() const
1023 { return this->inputs_.end(); }
1024
1025 private:
1026 Command_line(const Command_line&);
1027 Command_line& operator=(const Command_line&);
1028
1029 // Report usage error.
1030 void
1031 usage() ATTRIBUTE_NORETURN;
1032 void
1033 usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN;
1034 void
1035 usage(const char* msg, char opt) ATTRIBUTE_NORETURN;
1036
1037 // Apply a command line option.
1038 void
1039 apply_option(const gold::options::One_option&, const char*);
1040
1041 // Add a file.
1042 void
1043 add_file(const char* name, bool is_lib);
1044
1045 // Examine the result of processing the command-line, and verify
1046 // the flags do not contradict each other or are otherwise illegal.
1047 void
1048 normalize_options();
1049
1050 General_options options_;
1051 Position_dependent_options position_options_;
1052 Script_options script_options_;
1053 Input_arguments inputs_;
1054 };
1055
1056 } // End namespace gold.
1057
1058 #endif // !defined(GOLD_OPTIONS_H)