summaryrefslogtreecommitdiff
path: root/gold/options.h
blob: 56907c058eadbc8ecd76d86d1a6b2538d3da7705 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
// options.h -- handle command line options for gold  -*- C++ -*-

// Command_line
//   Holds everything we get from the command line.
// General_options (from Command_line::options())
//   Options which are not position dependent.
// Input_argument (from Command_line::inputs())
//   The list of input files, including -l options.
// Position_dependent_options (from Input_argument::options())
//   Position dependent options which apply to this argument.

#ifndef GOLD_OPTIONS_H
#define GOLD_OPTIONS_H

#include <list>
#include <string>
#include <vector>

namespace gold
{

class Command_line;
class Input_file_group;

namespace options {

class Command_line_options;
struct One_option;

} // End namespace gold::options.

// The position independent options which apply to the whole link.
// There are a lot of them.

class General_options
{
 public:
  General_options();

  // -I: dynamic linker name.
  const char*
  dynamic_linker() const
  { return this->dynamic_linker_; }

  // -L: Library search path.
  typedef std::list<const char*> Dir_list;

  const Dir_list&
  search_path() const
  { return this->search_path_; }

  // -o: Output file name.
  const char*
  output_file_name() const
  { return this->output_file_name_; }

  // -r: Whether we are doing a relocatable link.
  bool
  is_relocatable() const
  { return this->is_relocatable_; }

  // --shared: Whether generating a shared object.
  bool
  is_shared() const
  { return this->is_shared_; }

  // --static: Whether doing a static link.
  bool
  is_static() const
  { return this->is_static_; }

 private:
  // Don't copy this structure.
  General_options(const General_options&);
  General_options& operator=(const General_options&);

  friend class Command_line;
  friend class options::Command_line_options;

  void
  set_dynamic_linker(const char* arg)
  { this->dynamic_linker_ = arg; }

  void
  add_to_search_path(const char* arg)
  { this->search_path_.push_back(arg); }

  void
  set_output_file_name(const char* arg)
  { this->output_file_name_ = arg; }

  void
  set_relocatable()
  { this->is_relocatable_ = true; }

  void
  set_shared()
  { this->is_shared_ = true; }

  void
  set_static()
  { this->is_static_ = true; }

  void
  ignore(const char*)
  { }

  const char* dynamic_linker_;
  Dir_list search_path_;
  const char* output_file_name_;
  bool is_relocatable_;
  bool is_shared_;
  bool is_static_;
};

// The current state of the position dependent options.

class Position_dependent_options
{
 public:
  Position_dependent_options();

  // -Bstatic: Whether we are searching for a static archive rather
  // than a shared object.
  bool
  do_static_search() const
  { return this->do_static_search_; }

  // --as-needed: Whether to add a DT_NEEDED argument only if the
  // dynamic object is used.
  bool
  as_needed() const
  { return this->as_needed_; }

  void
  set_static_search()
  { this->do_static_search_ = true; }

  void
  set_dynamic_search()
  { this->do_static_search_ = false; }

  void
  set_as_needed()
  { this->as_needed_ = true; }

  void
  clear_as_needed()
  { this->as_needed_ = false; }

 private:
  bool do_static_search_;
  bool as_needed_;
};

// A single file or library argument from the command line.

class Input_file_argument
{
 public:
  Input_file_argument()
    : name_(), is_lib_(false), options_()
  { }

  Input_file_argument(const char* name, bool is_lib,
		      const Position_dependent_options& options)
    : name_(name), is_lib_(is_lib), options_(options)
  { }

  const char*
  name() const
  { return this->name_.c_str(); }

  const Position_dependent_options&
  options() const
  { return this->options_; }

  bool
  is_lib() const
  { return this->is_lib_; }

 private:
  // We use std::string, not const char*, here for convenience when
  // using script files, so that we do not have to preserve the string
  // in that case.
  std::string name_;
  bool is_lib_;
  Position_dependent_options options_;
};

// A file or library, or a group, from the command line.

class Input_argument
{
 public:
  // Create a file or library argument.
  explicit Input_argument(Input_file_argument file)
    : is_file_(true), file_(file), group_(NULL)
  { }

  // Create a group argument.
  explicit Input_argument(Input_file_group* group)
    : is_file_(false), group_(group)
  { }

  // Return whether this is a file.
  bool
  is_file() const
  { return this->is_file_; }

  // Return whether this is a group.
  bool
  is_group() const
  { return !this->is_file_; }

  // Return the information about the file.
  const Input_file_argument&
  file() const
  {
    gold_assert(this->is_file_);
    return this->file_;
  }

  // Return the information about the group.
  const Input_file_group*
  group() const
  {
    gold_assert(!this->is_file_);
    return this->group_;
  }

  Input_file_group*
  group()
  {
    gold_assert(!this->is_file_);
    return this->group_;
  }

 private:
  bool is_file_;
  Input_file_argument file_;
  Input_file_group* group_;
};

// A group from the command line.  This is a set of arguments within
// --start-group ... --end-group.

class Input_file_group
{
 public:
  typedef std::vector<Input_argument> Files;
  typedef Files::const_iterator const_iterator;

  Input_file_group()
    : files_()
  { }

  // Add a file to the end of the group.
  void
  add_file(const Input_file_argument& arg)
  { this->files_.push_back(Input_argument(arg)); }

  // Iterators to iterate over the group contents.

  const_iterator
  begin() const
  { return this->files_.begin(); }

  const_iterator
  end() const
  { return this->files_.end(); }

 private:
  Files files_;
};

// A list of files from the command line or a script.

class Input_arguments
{
 public:
  typedef std::vector<Input_argument> Input_argument_list;
  typedef Input_argument_list::const_iterator const_iterator;

  Input_arguments()
    : input_argument_list_(), in_group_(false)
  { }

  // Add a file.
  void
  add_file(const Input_file_argument& arg);

  // Start a group (the --start-group option).
  void
  start_group();

  // End a group (the --end-group option).
  void
  end_group();

  // Return whether we are currently in a group.
  bool
  in_group() const
  { return this->in_group_; }

  // Iterators to iterate over the list of input files.

  const_iterator
  begin() const
  { return this->input_argument_list_.begin(); }

  const_iterator
  end() const
  { return this->input_argument_list_.end(); }

  // Return whether the list is empty.
  bool
  empty() const
  { return this->input_argument_list_.empty(); }

 private:
  Input_argument_list input_argument_list_;
  bool in_group_;
};

// All the information read from the command line.

class Command_line
{
 public:
  typedef Input_arguments::const_iterator const_iterator;

  Command_line();

  // Process the command line options.  This will exit with an
  // appropriate error message if an unrecognized option is seen.
  void
  process(int argc, char** argv);

  // Handle a -l option.
  int
  process_l_option(int, char**, char*);

  // Handle a --start-group option.
  void
  start_group(const char* arg);

  // Handle a --end-group option.
  void
  end_group(const char* arg);

  // Get the general options.
  const General_options&
  options() const
  { return this->options_; }

  // Iterators to iterate over the list of input files.

  const_iterator
  begin() const
  { return this->inputs_.begin(); }

  const_iterator
  end() const
  { return this->inputs_.end(); }

 private:
  Command_line(const Command_line&);
  Command_line& operator=(const Command_line&);

  // Report usage error.
  void
  usage() ATTRIBUTE_NORETURN;
  void
  usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN;
  void
  usage(const char* msg, char opt) ATTRIBUTE_NORETURN;

  // Apply a command line option.
  void
  apply_option(const gold::options::One_option&, const char*);

  // Add a file.
  void
  add_file(const char* name, bool is_lib);

  General_options options_;
  Position_dependent_options position_options_;
  Input_arguments inputs_;
};

} // End namespace gold.

#endif // !defined(GOLD_OPTIONS_H)