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bae7f79e ILT |
1 | // options.c -- handle command line options for gold |
2 | ||
e5756efb | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
ad2d6943 ILT |
23 | #include "gold.h" |
24 | ||
a2b1aa12 | 25 | #include <cstdlib> |
04bf7072 | 26 | #include <cstring> |
ee1fe73e | 27 | #include <vector> |
bae7f79e | 28 | #include <iostream> |
ad2d6943 ILT |
29 | #include <sys/stat.h> |
30 | #include "filenames.h" | |
31 | #include "libiberty.h" | |
086a1841 | 32 | #include "demangle.h" |
819d6c3a | 33 | #include "../bfd/bfdver.h" |
bae7f79e | 34 | |
c7912668 | 35 | #include "debug.h" |
e5756efb | 36 | #include "script.h" |
ee1fe73e | 37 | #include "target-select.h" |
bae7f79e ILT |
38 | #include "options.h" |
39 | ||
61ba1cf9 ILT |
40 | namespace gold |
41 | { | |
42 | ||
ee1fe73e ILT |
43 | General_options |
44 | Position_dependent_options::default_options_; | |
bae7f79e | 45 | |
ee1fe73e | 46 | namespace options |
bae7f79e | 47 | { |
bae7f79e | 48 | |
ee1fe73e ILT |
49 | // This global variable is set up as General_options is constructed. |
50 | static std::vector<const One_option*> registered_options; | |
bae7f79e | 51 | |
ee1fe73e ILT |
52 | // These are set up at the same time -- the variables that accept one |
53 | // dash, two, or require -z. A single variable may be in more than | |
54 | // one of thes data structures. | |
55 | typedef Unordered_map<std::string, One_option*> Option_map; | |
56 | static Option_map* long_options = NULL; | |
57 | static One_option* short_options[128]; | |
bae7f79e | 58 | |
ee1fe73e ILT |
59 | void |
60 | One_option::register_option() | |
35cdfc9a | 61 | { |
ee1fe73e | 62 | registered_options.push_back(this); |
35cdfc9a | 63 | |
ee1fe73e ILT |
64 | // We can't make long_options a static Option_map because we can't |
65 | // guarantee that will be initialized before register_option() is | |
66 | // first called. | |
67 | if (long_options == NULL) | |
68 | long_options = new Option_map; | |
cd72c291 | 69 | |
ee1fe73e ILT |
70 | // TWO_DASHES means that two dashes are preferred, but one is ok too. |
71 | if (!this->longname.empty()) | |
72 | (*long_options)[this->longname] = this; | |
35cdfc9a | 73 | |
ee1fe73e ILT |
74 | const int shortname_as_int = static_cast<int>(this->shortname); |
75 | gold_assert(shortname_as_int >= 0 && shortname_as_int < 128); | |
76 | if (this->shortname != '\0') | |
77 | short_options[shortname_as_int] = this; | |
78 | } | |
c7912668 | 79 | |
ee1fe73e ILT |
80 | void |
81 | One_option::print() const | |
c7912668 | 82 | { |
ee1fe73e ILT |
83 | bool comma = false; |
84 | printf(" "); | |
85 | int len = 2; | |
86 | if (this->shortname != '\0') | |
87 | { | |
88 | len += printf("-%c", this->shortname); | |
89 | if (this->helparg) | |
90 | { | |
91 | // -z takes long-names only. | |
92 | gold_assert(this->dashes != DASH_Z); | |
a4d4b13f | 93 | len += printf(" %s", gettext(this->helparg)); |
ee1fe73e ILT |
94 | } |
95 | comma = true; | |
96 | } | |
97 | if (!this->longname.empty() | |
98 | && !(this->longname[0] == this->shortname | |
99 | && this->longname[1] == '\0')) | |
100 | { | |
101 | if (comma) | |
102 | len += printf(", "); | |
103 | switch (this->dashes) | |
104 | { | |
105 | case options::ONE_DASH: case options::EXACTLY_ONE_DASH: | |
106 | len += printf("-"); | |
107 | break; | |
108 | case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES: | |
109 | len += printf("--"); | |
110 | break; | |
111 | case options::DASH_Z: | |
112 | len += printf("-z "); | |
113 | break; | |
114 | default: | |
115 | gold_unreachable(); | |
116 | } | |
117 | len += printf("%s", this->longname.c_str()); | |
118 | if (this->helparg) | |
119 | { | |
120 | // For most options, we print "--frob FOO". But for -z | |
121 | // we print "-z frob=FOO". | |
122 | len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ', | |
a4d4b13f | 123 | gettext(this->helparg)); |
ee1fe73e ILT |
124 | } |
125 | } | |
126 | ||
127 | if (len >= 30) | |
128 | { | |
129 | printf("\n"); | |
130 | len = 0; | |
131 | } | |
132 | for (; len < 30; ++len) | |
133 | std::putchar(' '); | |
c7912668 | 134 | |
ee1fe73e | 135 | // TODO: if we're boolean, add " (default)" when appropriate. |
a4d4b13f | 136 | printf("%s\n", gettext(this->helpstring)); |
ee1fe73e | 137 | } |
c7912668 | 138 | |
ee1fe73e ILT |
139 | void |
140 | help() | |
bae7f79e | 141 | { |
ee1fe73e | 142 | printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name); |
bae7f79e | 143 | |
ee1fe73e ILT |
144 | std::vector<const One_option*>::const_iterator it; |
145 | for (it = registered_options.begin(); it != registered_options.end(); ++it) | |
146 | (*it)->print(); | |
e96caa79 ILT |
147 | |
148 | // config.guess and libtool.m4 look in ld --help output for the | |
149 | // string "supported targets". | |
150 | printf(_("%s: supported targets:"), gold::program_name); | |
151 | std::vector<const char*> supported_names; | |
152 | gold::supported_target_names(&supported_names); | |
153 | for (std::vector<const char*>::const_iterator p = supported_names.begin(); | |
154 | p != supported_names.end(); | |
155 | ++p) | |
156 | printf(" %s", *p); | |
157 | printf("\n"); | |
819d6c3a ILT |
158 | |
159 | // REPORT_BUGS_TO is defined in bfd/bfdver.h. | |
160 | const char* report = REPORT_BUGS_TO; | |
161 | if (*report != '\0') | |
162 | printf(_("Report bugs to %s\n"), report); | |
ee1fe73e | 163 | } |
61ba1cf9 | 164 | |
ee1fe73e ILT |
165 | // For bool, arg will be NULL (boolean options take no argument); |
166 | // we always just set to true. | |
167 | void | |
168 | parse_bool(const char*, const char*, bool* retval) | |
bae7f79e | 169 | { |
ee1fe73e ILT |
170 | *retval = true; |
171 | } | |
bae7f79e | 172 | |
ee1fe73e ILT |
173 | void |
174 | parse_uint(const char* option_name, const char* arg, int* retval) | |
175 | { | |
176 | char* endptr; | |
177 | *retval = strtol(arg, &endptr, 0); | |
178 | if (*endptr != '\0' || retval < 0) | |
179 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), | |
180 | option_name, arg); | |
181 | } | |
bc644c6c | 182 | |
ee1fe73e ILT |
183 | void |
184 | parse_uint64(const char* option_name, const char* arg, uint64_t *retval) | |
bc644c6c | 185 | { |
ee1fe73e ILT |
186 | char* endptr; |
187 | *retval = strtoull(arg, &endptr, 0); | |
188 | if (*endptr != '\0') | |
189 | gold_fatal(_("%s: invalid option value (expected an integer): %s"), | |
190 | option_name, arg); | |
191 | } | |
192 | ||
c18476e7 ILT |
193 | void |
194 | parse_double(const char* option_name, const char* arg, double* retval) | |
195 | { | |
196 | char* endptr; | |
197 | *retval = strtod(arg, &endptr); | |
198 | if (*endptr != '\0') | |
199 | gold_fatal(_("%s: invalid option value " | |
200 | "(expected a floating point number): %s"), | |
201 | option_name, arg); | |
202 | } | |
203 | ||
ee1fe73e ILT |
204 | void |
205 | parse_string(const char* option_name, const char* arg, const char** retval) | |
206 | { | |
207 | if (*arg == '\0') | |
208 | gold_fatal(_("%s: must take a non-empty argument"), option_name); | |
209 | *retval = arg; | |
210 | } | |
211 | ||
086a1841 ILT |
212 | void |
213 | parse_optional_string(const char*, const char* arg, const char** retval) | |
214 | { | |
215 | *retval = arg; | |
216 | } | |
217 | ||
ee1fe73e ILT |
218 | void |
219 | parse_dirlist(const char*, const char* arg, Dir_list* retval) | |
220 | { | |
221 | retval->push_back(Search_directory(arg, false)); | |
222 | } | |
223 | ||
224 | void | |
225 | parse_choices(const char* option_name, const char* arg, const char** retval, | |
226 | const char* choices[], int num_choices) | |
227 | { | |
228 | for (int i = 0; i < num_choices; i++) | |
229 | if (strcmp(choices[i], arg) == 0) | |
230 | { | |
231 | *retval = arg; | |
232 | return; | |
233 | } | |
234 | ||
235 | // If we get here, the user did not enter a valid choice, so we die. | |
236 | std::string choices_list; | |
237 | for (int i = 0; i < num_choices; i++) | |
bc644c6c | 238 | { |
ee1fe73e ILT |
239 | choices_list += choices[i]; |
240 | if (i != num_choices - 1) | |
241 | choices_list += ", "; | |
bc644c6c | 242 | } |
ee1fe73e ILT |
243 | gold_fatal(_("%s: must take one of the following arguments: %s"), |
244 | option_name, choices_list.c_str()); | |
bc644c6c ILT |
245 | } |
246 | ||
ee1fe73e | 247 | } // End namespace options. |
a5dc0706 | 248 | |
ee1fe73e ILT |
249 | // Define the handler for "special" options (set via DEFINE_special). |
250 | ||
251 | void | |
252 | General_options::parse_help(const char*, const char*, Command_line*) | |
a5dc0706 | 253 | { |
ee1fe73e ILT |
254 | options::help(); |
255 | ::exit(EXIT_SUCCESS); | |
a5dc0706 ILT |
256 | } |
257 | ||
ee1fe73e ILT |
258 | void |
259 | General_options::parse_version(const char* opt, const char*, Command_line*) | |
260 | { | |
261 | gold::print_version(opt[0] == '-' && opt[1] == 'v'); | |
262 | ::exit(EXIT_SUCCESS); | |
263 | } | |
61ba1cf9 | 264 | |
ee1fe73e ILT |
265 | void |
266 | General_options::parse_Bstatic(const char*, const char*, Command_line*) | |
61ba1cf9 | 267 | { |
ee1fe73e | 268 | this->set_Bdynamic(false); |
3c2fafa5 ILT |
269 | } |
270 | ||
ee1fe73e ILT |
271 | void |
272 | General_options::parse_defsym(const char*, const char* arg, | |
273 | Command_line* cmdline) | |
274 | { | |
275 | cmdline->script_options().define_symbol(arg); | |
276 | } | |
88dd47ac | 277 | |
ee1fe73e ILT |
278 | void |
279 | General_options::parse_library(const char*, const char* arg, | |
280 | Command_line* cmdline) | |
281 | { | |
282 | Input_file_argument file(arg, true, "", false, *this); | |
283 | cmdline->inputs().add_file(file); | |
284 | } | |
285 | ||
286 | void | |
287 | General_options::parse_R(const char* option, const char* arg, | |
288 | Command_line* cmdline) | |
88dd47ac | 289 | { |
88dd47ac | 290 | struct stat s; |
ee1fe73e ILT |
291 | if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode)) |
292 | this->add_to_rpath(arg); | |
88dd47ac | 293 | else |
ee1fe73e | 294 | this->parse_just_symbols(option, arg, cmdline); |
88dd47ac ILT |
295 | } |
296 | ||
ee1fe73e ILT |
297 | void |
298 | General_options::parse_just_symbols(const char*, const char* arg, | |
299 | Command_line* cmdline) | |
88dd47ac | 300 | { |
ee1fe73e ILT |
301 | Input_file_argument file(arg, false, "", true, *this); |
302 | cmdline->inputs().add_file(file); | |
88dd47ac ILT |
303 | } |
304 | ||
ee1fe73e ILT |
305 | void |
306 | General_options::parse_static(const char*, const char*, Command_line*) | |
3c2fafa5 | 307 | { |
ee1fe73e | 308 | this->set_static(true); |
09124467 ILT |
309 | } |
310 | ||
ee1fe73e ILT |
311 | void |
312 | General_options::parse_script(const char*, const char* arg, | |
313 | Command_line* cmdline) | |
09124467 | 314 | { |
ee1fe73e ILT |
315 | if (!read_commandline_script(arg, cmdline)) |
316 | gold::gold_fatal(_("unable to parse script file %s"), arg); | |
61ba1cf9 ILT |
317 | } |
318 | ||
ee1fe73e ILT |
319 | void |
320 | General_options::parse_version_script(const char*, const char* arg, | |
321 | Command_line* cmdline) | |
ead1e424 | 322 | { |
ee1fe73e ILT |
323 | if (!read_version_script(arg, cmdline)) |
324 | gold::gold_fatal(_("unable to parse version script file %s"), arg); | |
ead1e424 ILT |
325 | } |
326 | ||
0864d551 ILT |
327 | void |
328 | General_options::parse_wrap(const char*, const char* arg, | |
329 | Command_line*) | |
330 | { | |
331 | this->wrap_symbols_.insert(std::string(arg)); | |
332 | } | |
333 | ||
ee1fe73e ILT |
334 | void |
335 | General_options::parse_start_group(const char*, const char*, | |
336 | Command_line* cmdline) | |
337 | { | |
338 | cmdline->inputs().start_group(); | |
339 | } | |
ead1e424 | 340 | |
ee1fe73e ILT |
341 | void |
342 | General_options::parse_end_group(const char*, const char*, | |
343 | Command_line* cmdline) | |
ead1e424 | 344 | { |
ee1fe73e | 345 | cmdline->inputs().end_group(); |
ead1e424 ILT |
346 | } |
347 | ||
ee1fe73e | 348 | } // End namespace gold. |
bae7f79e | 349 | |
ee1fe73e | 350 | namespace |
bae7f79e | 351 | { |
bae7f79e | 352 | |
ee1fe73e ILT |
353 | void |
354 | usage() | |
355 | { | |
356 | fprintf(stderr, | |
357 | _("%s: use the --help option for usage information\n"), | |
358 | gold::program_name); | |
359 | ::exit(EXIT_FAILURE); | |
360 | } | |
bae7f79e | 361 | |
ee1fe73e ILT |
362 | void |
363 | usage(const char* msg, const char *opt) | |
364 | { | |
365 | fprintf(stderr, | |
366 | _("%s: %s: %s\n"), | |
367 | gold::program_name, opt, msg); | |
368 | usage(); | |
bae7f79e ILT |
369 | } |
370 | ||
ee1fe73e ILT |
371 | // Recognize input and output target names. The GNU linker accepts |
372 | // these with --format and --oformat. This code is intended to be | |
373 | // minimally compatible. In practice for an ELF target this would be | |
374 | // the same target as the input files; that name always start with | |
375 | // "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex", | |
376 | // "binary", "ihex". | |
8486ee48 | 377 | |
ee1fe73e ILT |
378 | gold::General_options::Object_format |
379 | string_to_object_format(const char* arg) | |
8486ee48 | 380 | { |
ee1fe73e ILT |
381 | if (strncmp(arg, "elf", 3) == 0) |
382 | return gold::General_options::OBJECT_FORMAT_ELF; | |
383 | else if (strcmp(arg, "binary") == 0) | |
384 | return gold::General_options::OBJECT_FORMAT_BINARY; | |
385 | else | |
386 | { | |
09ffbbe0 | 387 | gold::gold_error(_("format '%s' not supported; treating as elf " |
ee1fe73e ILT |
388 | "(supported formats: elf, binary)"), |
389 | arg); | |
390 | return gold::General_options::OBJECT_FORMAT_ELF; | |
391 | } | |
8486ee48 ILT |
392 | } |
393 | ||
ad2d6943 ILT |
394 | // If the default sysroot is relocatable, try relocating it based on |
395 | // the prefix FROM. | |
396 | ||
397 | char* | |
398 | get_relative_sysroot(const char* from) | |
399 | { | |
400 | char* path = make_relative_prefix(gold::program_name, from, | |
ee1fe73e | 401 | TARGET_SYSTEM_ROOT); |
ad2d6943 ILT |
402 | if (path != NULL) |
403 | { | |
404 | struct stat s; | |
405 | if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode)) | |
ee1fe73e | 406 | return path; |
ad2d6943 ILT |
407 | free(path); |
408 | } | |
409 | ||
410 | return NULL; | |
411 | } | |
412 | ||
413 | // Return the default sysroot. This is set by the --with-sysroot | |
ee1fe73e ILT |
414 | // option to configure. Note we do not free the return value of |
415 | // get_relative_sysroot, which is a small memory leak, but is | |
416 | // necessary since we store this pointer directly in General_options. | |
ad2d6943 | 417 | |
ee1fe73e | 418 | const char* |
ad2d6943 ILT |
419 | get_default_sysroot() |
420 | { | |
421 | const char* sysroot = TARGET_SYSTEM_ROOT; | |
422 | if (*sysroot == '\0') | |
ee1fe73e | 423 | return NULL; |
ad2d6943 ILT |
424 | |
425 | if (TARGET_SYSTEM_ROOT_RELOCATABLE) | |
426 | { | |
ee1fe73e | 427 | char* path = get_relative_sysroot(BINDIR); |
ad2d6943 | 428 | if (path == NULL) |
ee1fe73e | 429 | path = get_relative_sysroot(TOOLBINDIR); |
ad2d6943 | 430 | if (path != NULL) |
ee1fe73e | 431 | return path; |
ad2d6943 ILT |
432 | } |
433 | ||
434 | return sysroot; | |
435 | } | |
436 | ||
ee1fe73e ILT |
437 | // Parse a long option. Such options have the form |
438 | // <-|--><option>[=arg]. If "=arg" is not present but the option | |
439 | // takes an argument, the next word is taken to the be the argument. | |
440 | // If equals_only is set, then only the <option>=<arg> form is | |
441 | // accepted, not the <option><space><arg> form. Returns a One_option | |
442 | // struct or NULL if argv[i] cannot be parsed as a long option. In | |
443 | // the not-NULL case, *arg is set to the option's argument (NULL if | |
444 | // the option takes no argument), and *i is advanced past this option. | |
445 | // NOTE: it is safe for argv and arg to point to the same place. | |
446 | gold::options::One_option* | |
447 | parse_long_option(int argc, const char** argv, bool equals_only, | |
448 | const char** arg, int* i) | |
61ba1cf9 | 449 | { |
ee1fe73e | 450 | const char* const this_argv = argv[*i]; |
bae7f79e | 451 | |
ee1fe73e ILT |
452 | const char* equals = strchr(this_argv, '='); |
453 | const char* option_start = this_argv + strspn(this_argv, "-"); | |
454 | std::string option(option_start, | |
455 | equals ? equals - option_start : strlen(option_start)); | |
35cdfc9a | 456 | |
ee1fe73e ILT |
457 | gold::options::Option_map::iterator it |
458 | = gold::options::long_options->find(option); | |
459 | if (it == gold::options::long_options->end()) | |
460 | return NULL; | |
35cdfc9a | 461 | |
ee1fe73e | 462 | gold::options::One_option* retval = it->second; |
c7912668 | 463 | |
ee1fe73e ILT |
464 | // If the dash-count doesn't match, we fail. |
465 | if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>" | |
466 | { | |
467 | if (retval->dashes != gold::options::DASH_Z) | |
468 | return NULL; | |
469 | } | |
470 | else if (this_argv[1] != '-') // one dash | |
471 | { | |
472 | if (retval->dashes != gold::options::ONE_DASH | |
473 | && retval->dashes != gold::options::EXACTLY_ONE_DASH | |
474 | && retval->dashes != gold::options::TWO_DASHES) | |
475 | return NULL; | |
476 | } | |
477 | else // two dashes (or more!) | |
478 | { | |
479 | if (retval->dashes != gold::options::TWO_DASHES | |
480 | && retval->dashes != gold::options::EXACTLY_TWO_DASHES | |
481 | && retval->dashes != gold::options::ONE_DASH) | |
482 | return NULL; | |
483 | } | |
bae7f79e | 484 | |
ee1fe73e ILT |
485 | // Now that we know the option is good (or else bad in a way that |
486 | // will cause us to die), increment i to point past this argv. | |
487 | ++(*i); | |
bae7f79e | 488 | |
ee1fe73e ILT |
489 | // Figure out the option's argument, if any. |
490 | if (!retval->takes_argument()) | |
491 | { | |
492 | if (equals) | |
493 | usage(_("unexpected argument"), this_argv); | |
494 | else | |
495 | *arg = NULL; | |
496 | } | |
497 | else | |
498 | { | |
499 | if (equals) | |
500 | *arg = equals + 1; | |
086a1841 ILT |
501 | else if (retval->takes_optional_argument()) |
502 | *arg = retval->default_value; | |
ee1fe73e ILT |
503 | else if (*i < argc && !equals_only) |
504 | *arg = argv[(*i)++]; | |
505 | else | |
506 | usage(_("missing argument"), this_argv); | |
507 | } | |
516cb3d0 | 508 | |
ee1fe73e ILT |
509 | return retval; |
510 | } | |
511 | ||
512 | // Parse a short option. Such options have the form -<option>[arg]. | |
513 | // If "arg" is not present but the option takes an argument, the next | |
514 | // word is taken to the be the argument. If the option does not take | |
515 | // an argument, it may be followed by another short option. Returns a | |
516 | // One_option struct or NULL if argv[i] cannot be parsed as a short | |
517 | // option. In the not-NULL case, *arg is set to the option's argument | |
518 | // (NULL if the option takes no argument), and *i is advanced past | |
519 | // this option. This function keeps *i the same if we parsed a short | |
520 | // option that does not take an argument, that looks to be followed by | |
521 | // another short option in the same word. | |
522 | gold::options::One_option* | |
523 | parse_short_option(int argc, const char** argv, int pos_in_argv_i, | |
524 | const char** arg, int* i) | |
525 | { | |
526 | const char* const this_argv = argv[*i]; | |
527 | ||
528 | if (this_argv[0] != '-') | |
529 | return NULL; | |
530 | ||
531 | // We handle -z as a special case. | |
532 | static gold::options::One_option dash_z("", gold::options::DASH_Z, | |
086a1841 ILT |
533 | 'z', "", "-z", "Z-OPTION", false, |
534 | NULL); | |
ee1fe73e ILT |
535 | gold::options::One_option* retval = NULL; |
536 | if (this_argv[pos_in_argv_i] == 'z') | |
537 | retval = &dash_z; | |
538 | else | |
539 | { | |
540 | const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]); | |
541 | if (char_as_int > 0 && char_as_int < 128) | |
542 | retval = gold::options::short_options[char_as_int]; | |
543 | } | |
516cb3d0 | 544 | |
ee1fe73e ILT |
545 | if (retval == NULL) |
546 | return NULL; | |
35cdfc9a | 547 | |
ee1fe73e ILT |
548 | // Figure out the option's argument, if any. |
549 | if (!retval->takes_argument()) | |
cd72c291 | 550 | { |
ee1fe73e ILT |
551 | *arg = NULL; |
552 | // We only advance past this argument if it's the only one in argv. | |
553 | if (this_argv[pos_in_argv_i + 1] == '\0') | |
554 | ++(*i); | |
cd72c291 ILT |
555 | } |
556 | else | |
ee1fe73e ILT |
557 | { |
558 | // If we take an argument, we'll eat up this entire argv entry. | |
559 | ++(*i); | |
560 | if (this_argv[pos_in_argv_i + 1] != '\0') | |
561 | *arg = this_argv + pos_in_argv_i + 1; | |
086a1841 ILT |
562 | else if (retval->takes_optional_argument()) |
563 | *arg = retval->default_value; | |
ee1fe73e ILT |
564 | else if (*i < argc) |
565 | *arg = argv[(*i)++]; | |
566 | else | |
567 | usage(_("missing argument"), this_argv); | |
568 | } | |
cd72c291 | 569 | |
ee1fe73e ILT |
570 | // If we're a -z option, we need to parse our argument as a |
571 | // long-option, e.g. "-z stacksize=8192". | |
572 | if (retval == &dash_z) | |
35cdfc9a | 573 | { |
ee1fe73e ILT |
574 | int dummy_i = 0; |
575 | const char* dash_z_arg = *arg; | |
576 | retval = parse_long_option(1, arg, true, arg, &dummy_i); | |
577 | if (retval == NULL) | |
578 | usage(_("unknown -z option"), dash_z_arg); | |
35cdfc9a ILT |
579 | } |
580 | ||
ee1fe73e | 581 | return retval; |
c7912668 ILT |
582 | } |
583 | ||
ee1fe73e | 584 | } // End anonymous namespace. |
c7912668 | 585 | |
ee1fe73e | 586 | namespace gold |
c7912668 | 587 | { |
c7912668 | 588 | |
ee1fe73e | 589 | General_options::General_options() |
086a1841 | 590 | : execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false), |
0864d551 | 591 | do_demangle_(false), wrap_symbols_() |
ee1fe73e ILT |
592 | { |
593 | } | |
594 | ||
595 | General_options::Object_format | |
596 | General_options::format_enum() const | |
597 | { | |
598 | return string_to_object_format(this->format()); | |
599 | } | |
600 | ||
601 | General_options::Object_format | |
602 | General_options::oformat_enum() const | |
603 | { | |
604 | return string_to_object_format(this->oformat()); | |
35cdfc9a ILT |
605 | } |
606 | ||
ad2d6943 ILT |
607 | // Add the sysroot, if any, to the search paths. |
608 | ||
609 | void | |
610 | General_options::add_sysroot() | |
611 | { | |
ee1fe73e | 612 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') |
ad2d6943 | 613 | { |
ee1fe73e ILT |
614 | this->set_sysroot(get_default_sysroot()); |
615 | if (this->sysroot() == NULL || this->sysroot()[0] == '\0') | |
616 | return; | |
ad2d6943 ILT |
617 | } |
618 | ||
ee1fe73e | 619 | char* canonical_sysroot = lrealpath(this->sysroot()); |
ad2d6943 | 620 | |
ee1fe73e ILT |
621 | for (Dir_list::iterator p = this->library_path_.value.begin(); |
622 | p != this->library_path_.value.end(); | |
ad2d6943 | 623 | ++p) |
ee1fe73e | 624 | p->add_sysroot(this->sysroot(), canonical_sysroot); |
ad2d6943 ILT |
625 | |
626 | free(canonical_sysroot); | |
627 | } | |
628 | ||
ee1fe73e ILT |
629 | // Set up variables and other state that isn't set up automatically by |
630 | // the parse routine, and ensure options don't contradict each other | |
631 | // and are otherwise kosher. | |
e5756efb | 632 | |
ee1fe73e ILT |
633 | void |
634 | General_options::finalize() | |
bc644c6c | 635 | { |
ee1fe73e ILT |
636 | // Normalize the strip modifiers. They have a total order: |
637 | // strip_all > strip_debug > strip_debug_gdb. If one is true, set | |
638 | // all beneath it to true as well. | |
639 | if (this->strip_all()) | |
640 | this->set_strip_debug(true); | |
641 | if (this->strip_debug()) | |
642 | this->set_strip_debug_gdb(true); | |
bc644c6c | 643 | |
ee1fe73e ILT |
644 | // If the user specifies both -s and -r, convert the -s to -S. |
645 | // -r requires us to keep externally visible symbols! | |
646 | if (this->strip_all() && this->relocatable()) | |
647 | { | |
648 | this->set_strip_all(false); | |
649 | gold_assert(this->strip_debug()); | |
650 | } | |
bc644c6c | 651 | |
ee1fe73e ILT |
652 | // For us, -dc and -dp are synonyms for --define-common. |
653 | if (this->dc()) | |
654 | this->set_define_common(true); | |
655 | if (this->dp()) | |
656 | this->set_define_common(true); | |
657 | ||
658 | // We also set --define-common if we're not relocatable, as long as | |
659 | // the user didn't explicitly ask for something different. | |
660 | if (!this->user_set_define_common()) | |
661 | this->set_define_common(!this->relocatable()); | |
662 | ||
663 | // execstack_status_ is a three-state variable; update it based on | |
664 | // -z [no]execstack. | |
665 | if (this->execstack()) | |
666 | this->set_execstack_status(EXECSTACK_YES); | |
667 | else if (this->noexecstack()) | |
668 | this->set_execstack_status(EXECSTACK_NO); | |
669 | ||
086a1841 ILT |
670 | // Handle the optional argument for --demangle. |
671 | if (this->user_set_demangle()) | |
672 | { | |
673 | this->set_do_demangle(true); | |
674 | const char* style = this->demangle(); | |
675 | if (*style != '\0') | |
676 | { | |
677 | enum demangling_styles style_code; | |
678 | ||
679 | style_code = cplus_demangle_name_to_style(style); | |
680 | if (style_code == unknown_demangling) | |
681 | gold_fatal("unknown demangling style '%s'", style); | |
682 | cplus_demangle_set_style(style_code); | |
683 | } | |
684 | } | |
685 | else if (this->user_set_no_demangle()) | |
686 | this->set_do_demangle(false); | |
687 | else | |
688 | { | |
689 | // Testing COLLECT_NO_DEMANGLE makes our default demangling | |
690 | // behaviour identical to that of gcc's linker wrapper. | |
691 | this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL); | |
692 | } | |
693 | ||
ee1fe73e ILT |
694 | // If --thread_count is specified, it applies to |
695 | // --thread-count-{initial,middle,final}, though it doesn't override | |
696 | // them. | |
697 | if (this->thread_count() > 0 && this->thread_count_initial() == 0) | |
698 | this->set_thread_count_initial(this->thread_count()); | |
699 | if (this->thread_count() > 0 && this->thread_count_middle() == 0) | |
700 | this->set_thread_count_middle(this->thread_count()); | |
701 | if (this->thread_count() > 0 && this->thread_count_final() == 0) | |
702 | this->set_thread_count_final(this->thread_count()); | |
703 | ||
09ffbbe0 ILT |
704 | // Let's warn if you set the thread-count but we're going to ignore it. |
705 | #ifndef ENABLE_THREADS | |
706 | if (this->threads()) | |
707 | { | |
708 | gold_warning(_("ignoring --threads: " | |
709 | "%s was compiled without thread support"), | |
710 | program_name); | |
711 | this->set_threads(false); | |
712 | } | |
713 | if (this->thread_count() > 0 || this->thread_count_initial() > 0 | |
714 | || this->thread_count_middle() > 0 || this->thread_count_final() > 0) | |
715 | gold_warning(_("ignoring --thread-count: " | |
716 | "%s was compiled without thread support"), | |
717 | program_name); | |
718 | #endif | |
719 | ||
706e1f5e ILT |
720 | if (this->user_set_Y()) |
721 | { | |
722 | std::string s = this->Y(); | |
723 | if (s.compare(0, 2, "P,") == 0) | |
724 | s.erase(0, 2); | |
725 | ||
726 | size_t pos = 0; | |
727 | size_t next_pos; | |
728 | do | |
729 | { | |
730 | next_pos = s.find(':', pos); | |
731 | size_t len = (next_pos == std::string::npos | |
732 | ? next_pos | |
733 | : next_pos - pos); | |
734 | if (len != 0) | |
735 | this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str()); | |
736 | pos = next_pos + 1; | |
737 | } | |
738 | while (next_pos != std::string::npos); | |
739 | } | |
740 | else | |
741 | { | |
742 | // Even if they don't specify it, we add -L /lib and -L /usr/lib. | |
743 | // FIXME: We should only do this when configured in native mode. | |
744 | this->add_to_library_path_with_sysroot("/lib"); | |
745 | this->add_to_library_path_with_sysroot("/usr/lib"); | |
746 | } | |
ee1fe73e ILT |
747 | |
748 | // Normalize library_path() by adding the sysroot to all directories | |
749 | // in the path, as appropriate. | |
750 | this->add_sysroot(); | |
751 | ||
752 | // Now that we've normalized the options, check for contradictory ones. | |
753 | if (this->shared() && this->relocatable()) | |
754 | gold_fatal(_("-shared and -r are incompatible")); | |
755 | ||
756 | if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF | |
757 | && (this->shared() || this->relocatable())) | |
758 | gold_fatal(_("binary output format not compatible with -shared or -r")); | |
759 | ||
c18476e7 ILT |
760 | if (this->user_set_hash_bucket_empty_fraction() |
761 | && (this->hash_bucket_empty_fraction() < 0.0 | |
762 | || this->hash_bucket_empty_fraction() >= 1.0)) | |
763 | gold_fatal(_("--hash-bucket-empty-fraction value %g out of range " | |
764 | "[0.0, 1.0)"), | |
765 | this->hash_bucket_empty_fraction()); | |
766 | ||
ee1fe73e | 767 | // FIXME: we can/should be doing a lot more sanity checking here. |
e5756efb ILT |
768 | } |
769 | ||
ad2d6943 ILT |
770 | // Search_directory methods. |
771 | ||
772 | // This is called if we have a sysroot. Apply the sysroot if | |
773 | // appropriate. Record whether the directory is in the sysroot. | |
774 | ||
775 | void | |
776 | Search_directory::add_sysroot(const char* sysroot, | |
ee1fe73e | 777 | const char* canonical_sysroot) |
ad2d6943 ILT |
778 | { |
779 | gold_assert(*sysroot != '\0'); | |
780 | if (this->put_in_sysroot_) | |
781 | { | |
782 | if (!IS_DIR_SEPARATOR(this->name_[0]) | |
ee1fe73e ILT |
783 | && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1])) |
784 | this->name_ = '/' + this->name_; | |
ad2d6943 ILT |
785 | this->name_ = sysroot + this->name_; |
786 | this->is_in_sysroot_ = true; | |
787 | } | |
788 | else | |
789 | { | |
790 | // Check whether this entry is in the sysroot. To do this | |
791 | // correctly, we need to use canonical names. Otherwise we will | |
792 | // get confused by the ../../.. paths that gcc tends to use. | |
793 | char* canonical_name = lrealpath(this->name_.c_str()); | |
794 | int canonical_name_len = strlen(canonical_name); | |
795 | int canonical_sysroot_len = strlen(canonical_sysroot); | |
796 | if (canonical_name_len > canonical_sysroot_len | |
ee1fe73e ILT |
797 | && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len])) |
798 | { | |
799 | canonical_name[canonical_sysroot_len] = '\0'; | |
800 | if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0) | |
801 | this->is_in_sysroot_ = true; | |
802 | } | |
ad2d6943 ILT |
803 | free(canonical_name); |
804 | } | |
805 | } | |
806 | ||
dbe717ef ILT |
807 | // Input_arguments methods. |
808 | ||
809 | // Add a file to the list. | |
810 | ||
811 | void | |
812 | Input_arguments::add_file(const Input_file_argument& file) | |
813 | { | |
814 | if (!this->in_group_) | |
815 | this->input_argument_list_.push_back(Input_argument(file)); | |
816 | else | |
817 | { | |
a3ad94ed ILT |
818 | gold_assert(!this->input_argument_list_.empty()); |
819 | gold_assert(this->input_argument_list_.back().is_group()); | |
dbe717ef ILT |
820 | this->input_argument_list_.back().group()->add_file(file); |
821 | } | |
822 | } | |
823 | ||
824 | // Start a group. | |
825 | ||
826 | void | |
827 | Input_arguments::start_group() | |
828 | { | |
ee1fe73e ILT |
829 | if (this->in_group_) |
830 | gold_fatal(_("May not nest groups")); | |
dbe717ef ILT |
831 | Input_file_group* group = new Input_file_group(); |
832 | this->input_argument_list_.push_back(Input_argument(group)); | |
833 | this->in_group_ = true; | |
834 | } | |
835 | ||
836 | // End a group. | |
837 | ||
838 | void | |
839 | Input_arguments::end_group() | |
840 | { | |
ee1fe73e ILT |
841 | if (!this->in_group_) |
842 | gold_fatal(_("Group end without group start")); | |
dbe717ef ILT |
843 | this->in_group_ = false; |
844 | } | |
845 | ||
ead1e424 | 846 | // Command_line options. |
bae7f79e | 847 | |
a5dc0706 | 848 | Command_line::Command_line() |
bae7f79e ILT |
849 | { |
850 | } | |
851 | ||
ee1fe73e ILT |
852 | // Process the command line options. For process_one_option, i is the |
853 | // index of argv to process next, and must be an option (that is, | |
854 | // start with a dash). The return value is the index of the next | |
855 | // option to process (i+1 or i+2, or argc to indicate processing is | |
856 | // done). no_more_options is set to true if (and when) "--" is seen | |
857 | // as an option. | |
bae7f79e | 858 | |
a0451b38 | 859 | int |
ee1fe73e | 860 | Command_line::process_one_option(int argc, const char** argv, int i, |
a0451b38 | 861 | bool* no_more_options) |
bae7f79e | 862 | { |
ee1fe73e | 863 | gold_assert(argv[i][0] == '-' && !(*no_more_options)); |
a0451b38 | 864 | |
ee1fe73e ILT |
865 | // If we are reading "--", then just set no_more_options and return. |
866 | if (argv[i][1] == '-' && argv[i][2] == '\0') | |
bae7f79e | 867 | { |
ee1fe73e | 868 | *no_more_options = true; |
a0451b38 ILT |
869 | return i + 1; |
870 | } | |
bae7f79e | 871 | |
ee1fe73e ILT |
872 | int new_i = i; |
873 | options::One_option* option = NULL; | |
874 | const char* arg = NULL; | |
bae7f79e | 875 | |
ee1fe73e ILT |
876 | // First, try to process argv as a long option. |
877 | option = parse_long_option(argc, argv, false, &arg, &new_i); | |
878 | if (option) | |
a0451b38 | 879 | { |
ee1fe73e ILT |
880 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); |
881 | return new_i; | |
a0451b38 | 882 | } |
bae7f79e | 883 | |
ee1fe73e ILT |
884 | // Now, try to process argv as a short option. Since several short |
885 | // options can be combined in one argv, we may have to parse a lot | |
886 | // until we're done reading this argv. | |
887 | int pos_in_argv_i = 1; | |
888 | while (new_i == i) | |
a0451b38 | 889 | { |
ee1fe73e ILT |
890 | option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i); |
891 | if (!option) | |
892 | break; | |
893 | option->reader->parse_to_value(argv[i], arg, this, &this->options_); | |
894 | ++pos_in_argv_i; | |
a0451b38 | 895 | } |
ee1fe73e ILT |
896 | if (option) |
897 | return new_i; | |
a0451b38 | 898 | |
ee1fe73e ILT |
899 | // I guess it's neither a long option nor a short option. |
900 | usage(_("unknown option"), argv[i]); | |
901 | return argc; | |
a0451b38 | 902 | } |
bae7f79e | 903 | |
bae7f79e | 904 | |
a0451b38 | 905 | void |
ee1fe73e | 906 | Command_line::process(int argc, const char** argv) |
a0451b38 ILT |
907 | { |
908 | bool no_more_options = false; | |
909 | int i = 0; | |
910 | while (i < argc) | |
ead1e424 | 911 | { |
ee1fe73e ILT |
912 | this->position_options_.copy_from_options(this->options()); |
913 | if (no_more_options || argv[i][0] != '-') | |
914 | { | |
915 | Input_file_argument file(argv[i], false, "", false, | |
916 | this->position_options_); | |
917 | this->inputs_.add_file(file); | |
918 | ++i; | |
919 | } | |
bae7f79e | 920 | else |
ee1fe73e | 921 | i = process_one_option(argc, argv, i, &no_more_options); |
bae7f79e | 922 | } |
bae7f79e | 923 | |
dbe717ef | 924 | if (this->inputs_.in_group()) |
ee1fe73e ILT |
925 | { |
926 | fprintf(stderr, _("%s: missing group end\n"), program_name); | |
927 | usage(); | |
928 | } | |
bae7f79e | 929 | |
ee1fe73e ILT |
930 | // Normalize the options and ensure they don't contradict each other. |
931 | this->options_.finalize(); | |
bae7f79e | 932 | } |
61ba1cf9 ILT |
933 | |
934 | } // End namespace gold. |