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14c7833c | 1 | /* Command line option handling. |
5d4b393f | 2 | Copyright (C) 2006, 2007, 2008, 2010 Free Software Foundation, Inc. |
14c7833c L |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
14c7833c L |
9 | version. |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
14c7833c L |
19 | |
20 | #include "config.h" | |
21 | #include "system.h" | |
22 | #include "intl.h" | |
23 | #include "coretypes.h" | |
24 | #include "opts.h" | |
5d4b393f | 25 | #include "options.h" |
5f20c657 | 26 | #include "diagnostic.h" |
e200444e JM |
27 | #include "tm.h" /* For SWITCH_TAKES_ARG, WORD_SWITCH_TAKES_ARG and |
28 | TARGET_OPTION_TRANSLATE_TABLE. */ | |
14c7833c | 29 | |
60cf253a JM |
30 | static void prune_options (struct cl_decoded_option **, unsigned int *); |
31 | ||
14c7833c | 32 | /* Perform a binary search to find which option the command-line INPUT |
6e2f1956 JM |
33 | matches. Returns its index in the option array, and |
34 | OPT_SPECIAL_unknown on failure. | |
14c7833c L |
35 | |
36 | This routine is quite subtle. A normal binary search is not good | |
37 | enough because some options can be suffixed with an argument, and | |
38 | multiple sub-matches can occur, e.g. input of "-pedantic" matching | |
39 | the initial substring of "-pedantic-errors". | |
40 | ||
41 | A more complicated example is -gstabs. It should match "-g" with | |
42 | an argument of "stabs". Suppose, however, that the number and list | |
43 | of switches are such that the binary search tests "-gen-decls" | |
44 | before having tested "-g". This doesn't match, and as "-gen-decls" | |
45 | is less than "-gstabs", it will become the lower bound of the | |
46 | binary search range, and "-g" will never be seen. To resolve this | |
af47e6ac | 47 | issue, 'optc-gen.awk' makes "-gen-decls" point, via the back_chain member, |
14c7833c L |
48 | to "-g" so that failed searches that end between "-gen-decls" and |
49 | the lexicographically subsequent switch know to go back and see if | |
50 | "-g" causes a match (which it does in this example). | |
51 | ||
52 | This search is done in such a way that the longest match for the | |
53 | front end in question wins. If there is no match for the current | |
54 | front end, the longest match for a different front end is returned | |
55 | (or N_OPTS if none) and the caller emits an error message. */ | |
56 | size_t | |
57 | find_opt (const char *input, int lang_mask) | |
58 | { | |
e200444e | 59 | size_t mn, mn_orig, mx, md, opt_len; |
14c7833c L |
60 | size_t match_wrong_lang; |
61 | int comp; | |
62 | ||
63 | mn = 0; | |
64 | mx = cl_options_count; | |
65 | ||
66 | /* Find mn such this lexicographical inequality holds: | |
67 | cl_options[mn] <= input < cl_options[mn + 1]. */ | |
68 | while (mx - mn > 1) | |
69 | { | |
70 | md = (mn + mx) / 2; | |
71 | opt_len = cl_options[md].opt_len; | |
72 | comp = strncmp (input, cl_options[md].opt_text + 1, opt_len); | |
73 | ||
74 | if (comp < 0) | |
75 | mx = md; | |
76 | else | |
77 | mn = md; | |
78 | } | |
79 | ||
e200444e JM |
80 | mn_orig = mn; |
81 | ||
14c7833c | 82 | /* This is the switch that is the best match but for a different |
6e2f1956 JM |
83 | front end, or OPT_SPECIAL_unknown if there is no match at all. */ |
84 | match_wrong_lang = OPT_SPECIAL_unknown; | |
14c7833c L |
85 | |
86 | /* Backtrace the chain of possible matches, returning the longest | |
87 | one, if any, that fits best. With current GCC switches, this | |
88 | loop executes at most twice. */ | |
89 | do | |
90 | { | |
91 | const struct cl_option *opt = &cl_options[mn]; | |
92 | ||
93 | /* Is the input either an exact match or a prefix that takes a | |
94 | joined argument? */ | |
95 | if (!strncmp (input, opt->opt_text + 1, opt->opt_len) | |
96 | && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED))) | |
97 | { | |
98 | /* If language is OK, return it. */ | |
99 | if (opt->flags & lang_mask) | |
100 | return mn; | |
101 | ||
102 | /* If we haven't remembered a prior match, remember this | |
103 | one. Any prior match is necessarily better. */ | |
6e2f1956 | 104 | if (match_wrong_lang == OPT_SPECIAL_unknown) |
14c7833c L |
105 | match_wrong_lang = mn; |
106 | } | |
107 | ||
108 | /* Try the next possibility. This is cl_options_count if there | |
109 | are no more. */ | |
110 | mn = opt->back_chain; | |
111 | } | |
112 | while (mn != cl_options_count); | |
113 | ||
e200444e JM |
114 | if (match_wrong_lang == OPT_SPECIAL_unknown && input[0] == '-') |
115 | { | |
116 | /* Long options, starting "--", may be abbreviated if the | |
117 | abbreviation is unambiguous. This only applies to options | |
118 | not taking a joined argument, and abbreviations of "--option" | |
119 | are permitted even if there is a variant "--option=". */ | |
120 | size_t mnc = mn_orig + 1; | |
121 | size_t cmp_len = strlen (input); | |
122 | while (mnc < cl_options_count | |
123 | && strncmp (input, cl_options[mnc].opt_text + 1, cmp_len) == 0) | |
124 | { | |
125 | /* Option matching this abbreviation. OK if it is the first | |
126 | match and that does not take a joined argument, or the | |
127 | second match, taking a joined argument and with only '=' | |
128 | added to the first match; otherwise considered | |
129 | ambiguous. */ | |
130 | if (mnc == mn_orig + 1 | |
131 | && !(cl_options[mnc].flags & CL_JOINED)) | |
132 | match_wrong_lang = mnc; | |
133 | else if (mnc == mn_orig + 2 | |
134 | && match_wrong_lang == mn_orig + 1 | |
135 | && (cl_options[mnc].flags & CL_JOINED) | |
136 | && (cl_options[mnc].opt_len | |
137 | == cl_options[mn_orig + 1].opt_len + 1) | |
138 | && strncmp (cl_options[mnc].opt_text + 1, | |
139 | cl_options[mn_orig + 1].opt_text + 1, | |
140 | cl_options[mn_orig + 1].opt_len) == 0) | |
141 | ; /* OK, as long as there are no more matches. */ | |
142 | else | |
143 | return OPT_SPECIAL_unknown; | |
144 | mnc++; | |
145 | } | |
146 | } | |
147 | ||
6e2f1956 | 148 | /* Return the best wrong match, or OPT_SPECIAL_unknown if none. */ |
14c7833c L |
149 | return match_wrong_lang; |
150 | } | |
151 | ||
5d4b393f JM |
152 | /* If ARG is a non-negative integer made up solely of digits, return its |
153 | value, otherwise return -1. */ | |
154 | ||
155 | int | |
156 | integral_argument (const char *arg) | |
157 | { | |
158 | const char *p = arg; | |
159 | ||
160 | while (*p && ISDIGIT (*p)) | |
161 | p++; | |
162 | ||
163 | if (*p == '\0') | |
164 | return atoi (arg); | |
165 | ||
166 | return -1; | |
167 | } | |
168 | ||
d9d16a19 JM |
169 | /* Return whether OPTION is OK for the language given by |
170 | LANG_MASK. */ | |
171 | static bool | |
172 | option_ok_for_language (const struct cl_option *option, | |
173 | unsigned int lang_mask) | |
174 | { | |
175 | if (!(option->flags & lang_mask)) | |
176 | return false; | |
177 | else if ((option->flags & CL_TARGET) | |
178 | && (option->flags & (CL_LANG_ALL | CL_DRIVER)) | |
179 | && !(option->flags & (lang_mask & ~CL_COMMON & ~CL_TARGET))) | |
180 | /* Complain for target flag language mismatches if any languages | |
181 | are specified. */ | |
182 | return false; | |
183 | return true; | |
184 | } | |
185 | ||
5de8299c JM |
186 | |
187 | /* Fill in the canonical option part of *DECODED with an option | |
188 | described by OPT_INDEX, ARG and VALUE. */ | |
189 | ||
190 | static void | |
191 | generate_canonical_option (size_t opt_index, const char *arg, int value, | |
192 | struct cl_decoded_option *decoded) | |
193 | { | |
194 | const struct cl_option *option = &cl_options[opt_index]; | |
195 | const char *opt_text = option->opt_text; | |
196 | ||
197 | if (value == 0 | |
198 | && !(option->flags & CL_REJECT_NEGATIVE) | |
199 | && (opt_text[1] == 'W' || opt_text[1] == 'f' || opt_text[1] == 'm')) | |
200 | { | |
201 | char *t = XNEWVEC (char, option->opt_len + 5); | |
202 | t[0] = '-'; | |
203 | t[1] = opt_text[1]; | |
204 | t[2] = 'n'; | |
205 | t[3] = 'o'; | |
206 | t[4] = '-'; | |
207 | memcpy (t + 5, opt_text + 2, option->opt_len); | |
208 | opt_text = t; | |
209 | } | |
210 | ||
211 | decoded->canonical_option[2] = NULL; | |
212 | decoded->canonical_option[3] = NULL; | |
213 | ||
214 | if (arg) | |
215 | { | |
d1583032 JM |
216 | if ((option->flags & CL_SEPARATE) |
217 | && !(option->flags & CL_SEPARATE_ALIAS)) | |
5de8299c JM |
218 | { |
219 | decoded->canonical_option[0] = opt_text; | |
220 | decoded->canonical_option[1] = arg; | |
221 | decoded->canonical_option_num_elements = 2; | |
222 | } | |
223 | else | |
224 | { | |
225 | gcc_assert (option->flags & CL_JOINED); | |
226 | decoded->canonical_option[0] = concat (opt_text, arg, NULL); | |
227 | decoded->canonical_option[1] = NULL; | |
228 | decoded->canonical_option_num_elements = 1; | |
229 | } | |
230 | } | |
231 | else | |
232 | { | |
233 | decoded->canonical_option[0] = opt_text; | |
234 | decoded->canonical_option[1] = NULL; | |
235 | decoded->canonical_option_num_elements = 1; | |
236 | } | |
237 | } | |
238 | ||
e200444e JM |
239 | /* Structure describing mappings from options on the command line to |
240 | options to look up with find_opt. */ | |
241 | struct option_map | |
242 | { | |
243 | /* Prefix of the option on the command line. */ | |
244 | const char *opt0; | |
245 | /* If two argv elements are considered to be merged into one option, | |
246 | prefix for the second element, otherwise NULL. */ | |
247 | const char *opt1; | |
248 | /* The new prefix to map to. */ | |
249 | const char *new_prefix; | |
250 | /* Whether at least one character is needed following opt1 or opt0 | |
251 | for this mapping to be used. (--optimize= is valid for -O, but | |
252 | --warn- is not valid for -W.) */ | |
253 | bool another_char_needed; | |
254 | /* Whether the original option is a negated form of the option | |
255 | resulting from this map. */ | |
256 | bool negated; | |
257 | }; | |
258 | static const struct option_map option_map[] = | |
259 | { | |
260 | { "-Wno-", NULL, "-W", false, true }, | |
261 | { "-fno-", NULL, "-f", false, true }, | |
262 | { "-mno-", NULL, "-m", false, true }, | |
263 | { "--debug=", NULL, "-g", false, false }, | |
264 | { "--machine-", NULL, "-m", true, false }, | |
265 | { "--machine-no-", NULL, "-m", false, true }, | |
266 | { "--machine=", NULL, "-m", false, false }, | |
267 | { "--machine=no-", NULL, "-m", false, true }, | |
268 | { "--machine", "", "-m", false, false }, | |
269 | { "--machine", "no-", "-m", false, true }, | |
270 | { "--optimize=", NULL, "-O", false, false }, | |
271 | { "--std=", NULL, "-std=", false, false }, | |
272 | { "--std", "", "-std=", false, false }, | |
273 | { "--warn-", NULL, "-W", true, false }, | |
274 | { "--warn-no-", NULL, "-W", false, true }, | |
275 | { "--", NULL, "-f", true, false }, | |
276 | { "--no-", NULL, "-f", false, true } | |
277 | }; | |
278 | ||
5d4b393f | 279 | /* Decode the switch beginning at ARGV for the language indicated by |
603349bf JM |
280 | LANG_MASK (including CL_COMMON and CL_TARGET if applicable), into |
281 | the structure *DECODED. Returns the number of switches | |
282 | consumed. */ | |
5d4b393f | 283 | |
6e2f1956 | 284 | static unsigned int |
5d4b393f JM |
285 | decode_cmdline_option (const char **argv, unsigned int lang_mask, |
286 | struct cl_decoded_option *decoded) | |
287 | { | |
288 | size_t opt_index; | |
e200444e | 289 | const char *arg = 0; |
5d4b393f | 290 | int value = 1; |
e200444e JM |
291 | unsigned int result = 1, i, extra_args; |
292 | int adjust_len = 0; | |
eea13ead JM |
293 | size_t total_len; |
294 | char *p; | |
5d4b393f JM |
295 | const struct cl_option *option; |
296 | int errors = 0; | |
2d2bd949 | 297 | const char *warn_message = NULL; |
c878765b JM |
298 | bool separate_arg_flag; |
299 | bool joined_arg_flag; | |
d1583032 | 300 | bool have_separate_arg = false; |
5d4b393f | 301 | |
e200444e | 302 | extra_args = 0; |
5d4b393f | 303 | |
e200444e JM |
304 | opt_index = find_opt (argv[0] + 1, lang_mask); |
305 | i = 0; | |
306 | while (opt_index == OPT_SPECIAL_unknown | |
307 | && i < ARRAY_SIZE (option_map)) | |
5d4b393f | 308 | { |
e200444e JM |
309 | const char *opt0 = option_map[i].opt0; |
310 | const char *opt1 = option_map[i].opt1; | |
311 | const char *new_prefix = option_map[i].new_prefix; | |
312 | bool another_char_needed = option_map[i].another_char_needed; | |
313 | size_t opt0_len = strlen (opt0); | |
314 | size_t opt1_len = (opt1 == NULL ? 0 : strlen (opt1)); | |
315 | size_t optn_len = (opt1 == NULL ? opt0_len : opt1_len); | |
316 | size_t new_prefix_len = strlen (new_prefix); | |
317 | ||
318 | extra_args = (opt1 == NULL ? 0 : 1); | |
319 | value = !option_map[i].negated; | |
320 | ||
321 | if (strncmp (argv[0], opt0, opt0_len) == 0 | |
322 | && (opt1 == NULL | |
323 | || (argv[1] != NULL && strncmp (argv[1], opt1, opt1_len) == 0)) | |
324 | && (!another_char_needed | |
325 | || argv[extra_args][optn_len] != 0)) | |
326 | { | |
327 | size_t arglen = strlen (argv[extra_args]); | |
328 | char *dup; | |
329 | ||
330 | adjust_len = (int) optn_len - (int) new_prefix_len; | |
331 | dup = XNEWVEC (char, arglen + 1 - adjust_len); | |
332 | memcpy (dup, new_prefix, new_prefix_len); | |
333 | memcpy (dup + new_prefix_len, argv[extra_args] + optn_len, | |
334 | arglen - optn_len + 1); | |
335 | opt_index = find_opt (dup + 1, lang_mask); | |
336 | free (dup); | |
337 | } | |
338 | i++; | |
5d4b393f JM |
339 | } |
340 | ||
6e2f1956 JM |
341 | if (opt_index == OPT_SPECIAL_unknown) |
342 | { | |
343 | arg = argv[0]; | |
e200444e JM |
344 | extra_args = 0; |
345 | value = 1; | |
6e2f1956 JM |
346 | goto done; |
347 | } | |
5d4b393f JM |
348 | |
349 | option = &cl_options[opt_index]; | |
350 | ||
351 | /* Reject negative form of switches that don't take negatives as | |
352 | unrecognized. */ | |
353 | if (!value && (option->flags & CL_REJECT_NEGATIVE)) | |
354 | { | |
6e2f1956 | 355 | opt_index = OPT_SPECIAL_unknown; |
184eb658 | 356 | errors |= CL_ERR_NEGATIVE; |
6e2f1956 | 357 | arg = argv[0]; |
5d4b393f JM |
358 | goto done; |
359 | } | |
360 | ||
e200444e | 361 | result = extra_args + 1; |
2d2bd949 JM |
362 | warn_message = option->warn_message; |
363 | ||
5d4b393f JM |
364 | /* Check to see if the option is disabled for this configuration. */ |
365 | if (option->flags & CL_DISABLED) | |
366 | errors |= CL_ERR_DISABLED; | |
367 | ||
c878765b JM |
368 | /* Determine whether there may be a separate argument based on |
369 | whether this option is being processed for the driver. */ | |
370 | separate_arg_flag = ((option->flags & CL_SEPARATE) | |
371 | && !((option->flags & CL_NO_DRIVER_ARG) | |
372 | && (lang_mask & CL_DRIVER))); | |
373 | joined_arg_flag = (option->flags & CL_JOINED) != 0; | |
374 | ||
5d4b393f | 375 | /* Sort out any argument the switch takes. */ |
c878765b | 376 | if (joined_arg_flag) |
5d4b393f JM |
377 | { |
378 | /* Have arg point to the original switch. This is because | |
379 | some code, such as disable_builtin_function, expects its | |
380 | argument to be persistent until the program exits. */ | |
e200444e | 381 | arg = argv[extra_args] + cl_options[opt_index].opt_len + 1 + adjust_len; |
5d4b393f JM |
382 | |
383 | if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) | |
384 | { | |
c878765b | 385 | if (separate_arg_flag) |
5d4b393f | 386 | { |
e200444e JM |
387 | arg = argv[extra_args + 1]; |
388 | result = extra_args + 2; | |
5d4b393f | 389 | if (arg == NULL) |
e200444e | 390 | result = extra_args + 1; |
d1583032 JM |
391 | else |
392 | have_separate_arg = true; | |
5d4b393f JM |
393 | } |
394 | else | |
395 | /* Missing argument. */ | |
396 | arg = NULL; | |
397 | } | |
398 | } | |
c878765b | 399 | else if (separate_arg_flag) |
5d4b393f | 400 | { |
e200444e JM |
401 | arg = argv[extra_args + 1]; |
402 | result = extra_args + 2; | |
5d4b393f | 403 | if (arg == NULL) |
e200444e | 404 | result = extra_args + 1; |
d1583032 JM |
405 | else |
406 | have_separate_arg = true; | |
5d4b393f JM |
407 | } |
408 | ||
5de8299c JM |
409 | if (arg == NULL && (separate_arg_flag || joined_arg_flag)) |
410 | errors |= CL_ERR_MISSING_ARG; | |
411 | ||
2d2bd949 JM |
412 | /* Is this option an alias (or an ignored option, marked as an alias |
413 | of OPT_SPECIAL_ignore)? */ | |
d1583032 JM |
414 | if (option->alias_target != N_OPTS |
415 | && (!(option->flags & CL_SEPARATE_ALIAS) || have_separate_arg)) | |
5de8299c JM |
416 | { |
417 | size_t new_opt_index = option->alias_target; | |
5de8299c | 418 | |
2d2bd949 | 419 | if (new_opt_index == OPT_SPECIAL_ignore) |
5de8299c | 420 | { |
2d2bd949 JM |
421 | gcc_assert (option->alias_arg == NULL); |
422 | gcc_assert (option->neg_alias_arg == NULL); | |
423 | opt_index = new_opt_index; | |
424 | arg = NULL; | |
5de8299c JM |
425 | value = 1; |
426 | } | |
2d2bd949 | 427 | else |
5de8299c | 428 | { |
2d2bd949 | 429 | const struct cl_option *new_option = &cl_options[new_opt_index]; |
5de8299c | 430 | |
2d2bd949 | 431 | /* The new option must not be an alias itself. */ |
e200444e JM |
432 | gcc_assert (new_option->alias_target == N_OPTS |
433 | || (new_option->flags & CL_SEPARATE_ALIAS)); | |
5de8299c | 434 | |
2d2bd949 JM |
435 | if (option->neg_alias_arg) |
436 | { | |
437 | gcc_assert (option->alias_arg != NULL); | |
438 | gcc_assert (arg == NULL); | |
439 | if (value) | |
440 | arg = option->alias_arg; | |
441 | else | |
442 | arg = option->neg_alias_arg; | |
443 | value = 1; | |
444 | } | |
445 | else if (option->alias_arg) | |
446 | { | |
447 | gcc_assert (value == 1); | |
448 | gcc_assert (arg == NULL); | |
449 | arg = option->alias_arg; | |
450 | } | |
5de8299c | 451 | |
2d2bd949 JM |
452 | opt_index = new_opt_index; |
453 | option = new_option; | |
5de8299c | 454 | |
2d2bd949 JM |
455 | if (value == 0) |
456 | gcc_assert (!(option->flags & CL_REJECT_NEGATIVE)); | |
457 | ||
458 | /* Recompute what arguments are allowed. */ | |
459 | separate_arg_flag = ((option->flags & CL_SEPARATE) | |
460 | && !((option->flags & CL_NO_DRIVER_ARG) | |
461 | && (lang_mask & CL_DRIVER))); | |
462 | joined_arg_flag = (option->flags & CL_JOINED) != 0; | |
463 | ||
464 | if (!(errors & CL_ERR_MISSING_ARG)) | |
465 | { | |
466 | if (separate_arg_flag || joined_arg_flag) | |
e200444e JM |
467 | { |
468 | if ((option->flags & CL_MISSING_OK) && arg == NULL) | |
469 | arg = ""; | |
470 | gcc_assert (arg != NULL); | |
471 | } | |
2d2bd949 JM |
472 | else |
473 | gcc_assert (arg == NULL); | |
474 | } | |
5de8299c | 475 | |
2d2bd949 JM |
476 | /* Recheck for warnings and disabled options. */ |
477 | if (option->warn_message) | |
478 | { | |
479 | gcc_assert (warn_message == NULL); | |
480 | warn_message = option->warn_message; | |
481 | } | |
482 | if (option->flags & CL_DISABLED) | |
483 | errors |= CL_ERR_DISABLED; | |
484 | } | |
5de8299c JM |
485 | } |
486 | ||
5d4b393f | 487 | /* Check if this is a switch for a different front end. */ |
d9d16a19 | 488 | if (!option_ok_for_language (option, lang_mask)) |
5d4b393f | 489 | errors |= CL_ERR_WRONG_LANG; |
5d4b393f | 490 | |
5d4b393f JM |
491 | /* If the switch takes an integer, convert it. */ |
492 | if (arg && (option->flags & CL_UINTEGER)) | |
493 | { | |
494 | value = integral_argument (arg); | |
495 | if (value == -1) | |
496 | errors |= CL_ERR_UINT_ARG; | |
497 | } | |
498 | ||
499 | done: | |
5d4b393f JM |
500 | decoded->opt_index = opt_index; |
501 | decoded->arg = arg; | |
502 | decoded->value = value; | |
503 | decoded->errors = errors; | |
2d2bd949 | 504 | decoded->warn_message = warn_message; |
eea13ead JM |
505 | |
506 | if (opt_index == OPT_SPECIAL_unknown) | |
6e2f1956 | 507 | { |
eea13ead JM |
508 | /* Skip the correct number of arguments for options handled |
509 | through specs. */ | |
510 | const char *popt = argv[0] + 1; | |
511 | int c = *popt; | |
512 | ||
513 | gcc_assert (result == 1); | |
514 | if (SWITCH_TAKES_ARG (c) > (popt[1] != 0)) | |
515 | result += SWITCH_TAKES_ARG (c) - (popt[1] != 0); | |
516 | else if (WORD_SWITCH_TAKES_ARG (popt)) | |
517 | result += WORD_SWITCH_TAKES_ARG (popt); | |
518 | if (result > 1) | |
519 | for (i = 1; i < result; i++) | |
520 | if (argv[i] == NULL) | |
521 | { | |
522 | result = i; | |
523 | break; | |
524 | } | |
6e2f1956 | 525 | } |
eea13ead JM |
526 | |
527 | gcc_assert (result >= 1 && result <= ARRAY_SIZE (decoded->canonical_option)); | |
528 | decoded->canonical_option_num_elements = result; | |
529 | total_len = 0; | |
530 | for (i = 0; i < ARRAY_SIZE (decoded->canonical_option); i++) | |
531 | { | |
532 | if (i < result) | |
533 | { | |
5de8299c JM |
534 | if (opt_index == OPT_SPECIAL_unknown) |
535 | decoded->canonical_option[i] = argv[i]; | |
536 | else | |
537 | decoded->canonical_option[i] = NULL; | |
eea13ead JM |
538 | total_len += strlen (argv[i]) + 1; |
539 | } | |
540 | else | |
541 | decoded->canonical_option[i] = NULL; | |
542 | } | |
2d2bd949 | 543 | if (opt_index != OPT_SPECIAL_unknown && opt_index != OPT_SPECIAL_ignore) |
5de8299c | 544 | generate_canonical_option (opt_index, arg, value, decoded); |
eea13ead JM |
545 | decoded->orig_option_with_args_text = p = XNEWVEC (char, total_len); |
546 | for (i = 0; i < result; i++) | |
547 | { | |
548 | size_t len = strlen (argv[i]); | |
549 | ||
550 | memcpy (p, argv[i], len); | |
551 | p += len; | |
552 | if (i == result - 1) | |
553 | *p++ = 0; | |
554 | else | |
555 | *p++ = ' '; | |
556 | } | |
557 | ||
5d4b393f JM |
558 | return result; |
559 | } | |
560 | ||
e200444e JM |
561 | #ifdef TARGET_OPTION_TRANSLATE_TABLE |
562 | static const struct { | |
563 | const char *const option_found; | |
564 | const char *const replacements; | |
565 | } target_option_translations[] = | |
566 | { | |
567 | TARGET_OPTION_TRANSLATE_TABLE, | |
568 | { 0, 0 } | |
569 | }; | |
570 | #endif | |
571 | ||
6e2f1956 JM |
572 | /* Decode command-line options (ARGC and ARGV being the arguments of |
573 | main) into an array, setting *DECODED_OPTIONS to a pointer to that | |
574 | array and *DECODED_OPTIONS_COUNT to the number of entries in the | |
575 | array. The first entry in the array is always one for the program | |
576 | name (OPT_SPECIAL_program_name). LANG_MASK indicates the language | |
603349bf JM |
577 | flags applicable for decoding (including CL_COMMON and CL_TARGET if |
578 | those options should be considered applicable). Do not produce any | |
579 | diagnostics or set state outside of these variables. */ | |
6e2f1956 JM |
580 | |
581 | void | |
582 | decode_cmdline_options_to_array (unsigned int argc, const char **argv, | |
583 | unsigned int lang_mask, | |
584 | struct cl_decoded_option **decoded_options, | |
585 | unsigned int *decoded_options_count) | |
586 | { | |
e200444e | 587 | unsigned int n, i, target_translate_from; |
6e2f1956 JM |
588 | struct cl_decoded_option *opt_array; |
589 | unsigned int num_decoded_options; | |
e200444e | 590 | bool argv_copied = false; |
6e2f1956 JM |
591 | |
592 | opt_array = XNEWVEC (struct cl_decoded_option, argc); | |
593 | ||
594 | opt_array[0].opt_index = OPT_SPECIAL_program_name; | |
2d2bd949 | 595 | opt_array[0].warn_message = NULL; |
6e2f1956 JM |
596 | opt_array[0].arg = argv[0]; |
597 | opt_array[0].orig_option_with_args_text = argv[0]; | |
eea13ead | 598 | opt_array[0].canonical_option_num_elements = 1; |
7a9bf9a4 JM |
599 | opt_array[0].canonical_option[0] = argv[0]; |
600 | opt_array[0].canonical_option[1] = NULL; | |
eea13ead JM |
601 | opt_array[0].canonical_option[2] = NULL; |
602 | opt_array[0].canonical_option[3] = NULL; | |
6e2f1956 JM |
603 | opt_array[0].value = 1; |
604 | opt_array[0].errors = 0; | |
605 | num_decoded_options = 1; | |
606 | ||
e200444e | 607 | target_translate_from = 1; |
6e2f1956 JM |
608 | for (i = 1; i < argc; i += n) |
609 | { | |
610 | const char *opt = argv[i]; | |
611 | ||
612 | /* Interpret "-" or a non-switch as a file name. */ | |
613 | if (opt[0] != '-' || opt[1] == '\0') | |
614 | { | |
d9d16a19 | 615 | generate_option_input_file (opt, &opt_array[num_decoded_options]); |
6e2f1956 JM |
616 | num_decoded_options++; |
617 | n = 1; | |
618 | continue; | |
619 | } | |
620 | ||
e200444e JM |
621 | if (i >= target_translate_from && (lang_mask & CL_DRIVER)) |
622 | { | |
623 | #ifdef TARGET_OPTION_TRANSLATE_TABLE | |
624 | int tott_idx; | |
625 | ||
626 | for (tott_idx = 0; | |
627 | target_option_translations[tott_idx].option_found; | |
628 | tott_idx++) | |
629 | { | |
630 | if (strcmp (target_option_translations[tott_idx].option_found, | |
631 | argv[i]) == 0) | |
632 | { | |
633 | unsigned int spaces = 0; | |
634 | unsigned int m = 0; | |
635 | const char *sp; | |
636 | char *np; | |
637 | ||
638 | for (sp = target_option_translations[tott_idx].replacements; | |
639 | *sp; sp++) | |
640 | { | |
641 | if (*sp == ' ') | |
642 | { | |
643 | spaces++; | |
644 | while (*sp == ' ') | |
645 | sp++; | |
646 | sp--; | |
647 | } | |
648 | } | |
649 | ||
650 | if (spaces) | |
651 | { | |
652 | int new_argc = argc + spaces; | |
653 | if (argv_copied) | |
654 | argv = XRESIZEVEC (const char *, argv, new_argc + 1); | |
655 | else | |
656 | { | |
657 | const char **new_argv = XNEWVEC (const char *, | |
658 | new_argc + 1); | |
659 | memcpy (new_argv, argv, | |
660 | (argc + 1) * sizeof (const char *)); | |
661 | argv = new_argv; | |
662 | argv_copied = true; | |
663 | } | |
664 | memmove (&argv[i] + spaces, &argv[i], | |
665 | (argc + 1 - i) * sizeof (const char *)); | |
666 | argc = new_argc; | |
667 | opt_array = XRESIZEVEC (struct cl_decoded_option, | |
668 | opt_array, argc); | |
669 | } | |
670 | ||
671 | sp = target_option_translations[tott_idx].replacements; | |
672 | np = xstrdup (sp); | |
673 | ||
674 | while (1) | |
675 | { | |
676 | while (*np == ' ') | |
677 | np++; | |
678 | if (*np == 0) | |
679 | break; | |
680 | argv[i + m++] = np; | |
681 | while (*np != ' ' && *np) | |
682 | np++; | |
683 | if (*np == 0) | |
684 | break; | |
685 | *np++ = 0; | |
686 | } | |
687 | ||
688 | target_translate_from = i + m; | |
689 | gcc_assert (m == spaces + 1); | |
690 | break; | |
691 | } | |
692 | } | |
693 | #endif | |
694 | } | |
695 | ||
6e2f1956 JM |
696 | n = decode_cmdline_option (argv + i, lang_mask, |
697 | &opt_array[num_decoded_options]); | |
698 | num_decoded_options++; | |
699 | } | |
700 | ||
e200444e JM |
701 | if (argv_copied) |
702 | free (argv); | |
6e2f1956 JM |
703 | *decoded_options = opt_array; |
704 | *decoded_options_count = num_decoded_options; | |
60cf253a | 705 | prune_options (decoded_options, decoded_options_count); |
6e2f1956 JM |
706 | } |
707 | ||
14c7833c L |
708 | /* Return true if NEXT_OPT_IDX cancels OPT_IDX. Return false if the |
709 | next one is the same as ORIG_NEXT_OPT_IDX. */ | |
710 | ||
711 | static bool | |
712 | cancel_option (int opt_idx, int next_opt_idx, int orig_next_opt_idx) | |
713 | { | |
714 | /* An option can be canceled by the same option or an option with | |
715 | Negative. */ | |
716 | if (cl_options [next_opt_idx].neg_index == opt_idx) | |
717 | return true; | |
718 | ||
719 | if (cl_options [next_opt_idx].neg_index != orig_next_opt_idx) | |
720 | return cancel_option (opt_idx, cl_options [next_opt_idx].neg_index, | |
721 | orig_next_opt_idx); | |
b8698a0f | 722 | |
14c7833c L |
723 | return false; |
724 | } | |
725 | ||
726 | /* Filter out options canceled by the ones after them. */ | |
727 | ||
60cf253a JM |
728 | static void |
729 | prune_options (struct cl_decoded_option **decoded_options, | |
730 | unsigned int *decoded_options_count) | |
14c7833c | 731 | { |
60cf253a JM |
732 | unsigned int old_decoded_options_count = *decoded_options_count; |
733 | struct cl_decoded_option *old_decoded_options = *decoded_options; | |
734 | unsigned int new_decoded_options_count; | |
735 | struct cl_decoded_option *new_decoded_options | |
736 | = XNEWVEC (struct cl_decoded_option, old_decoded_options_count); | |
737 | unsigned int i; | |
14c7833c | 738 | const struct cl_option *option; |
14c7833c L |
739 | |
740 | /* Remove arguments which are negated by others after them. */ | |
60cf253a JM |
741 | new_decoded_options_count = 0; |
742 | for (i = 0; i < old_decoded_options_count; i++) | |
14c7833c | 743 | { |
60cf253a JM |
744 | unsigned int j, opt_idx, next_opt_idx; |
745 | ||
746 | if (old_decoded_options[i].errors & ~CL_ERR_WRONG_LANG) | |
747 | goto keep; | |
14c7833c | 748 | |
60cf253a JM |
749 | opt_idx = old_decoded_options[i].opt_index; |
750 | switch (opt_idx) | |
14c7833c | 751 | { |
60cf253a JM |
752 | case OPT_SPECIAL_unknown: |
753 | case OPT_SPECIAL_ignore: | |
754 | case OPT_SPECIAL_program_name: | |
755 | case OPT_SPECIAL_input_file: | |
756 | goto keep; | |
757 | ||
758 | default: | |
759 | gcc_assert (opt_idx < cl_options_count); | |
760 | option = &cl_options[opt_idx]; | |
761 | if (option->neg_index < 0) | |
762 | goto keep; | |
763 | ||
764 | /* Skip joined switches. */ | |
765 | if ((option->flags & CL_JOINED)) | |
766 | goto keep; | |
767 | ||
768 | for (j = i + 1; j < old_decoded_options_count; j++) | |
14c7833c | 769 | { |
60cf253a JM |
770 | if (old_decoded_options[j].errors & ~CL_ERR_WRONG_LANG) |
771 | continue; | |
772 | next_opt_idx = old_decoded_options[j].opt_index; | |
773 | if (next_opt_idx >= cl_options_count) | |
774 | continue; | |
775 | if (cl_options[next_opt_idx].neg_index < 0) | |
776 | continue; | |
777 | if ((cl_options[next_opt_idx].flags & CL_JOINED)) | |
778 | continue; | |
779 | if (cancel_option (opt_idx, next_opt_idx, next_opt_idx)) | |
14c7833c L |
780 | break; |
781 | } | |
60cf253a JM |
782 | if (j == old_decoded_options_count) |
783 | { | |
14c7833c | 784 | keep: |
60cf253a JM |
785 | new_decoded_options[new_decoded_options_count] |
786 | = old_decoded_options[i]; | |
787 | new_decoded_options_count++; | |
788 | } | |
789 | break; | |
14c7833c L |
790 | } |
791 | } | |
792 | ||
60cf253a JM |
793 | free (old_decoded_options); |
794 | new_decoded_options = XRESIZEVEC (struct cl_decoded_option, | |
795 | new_decoded_options, | |
796 | new_decoded_options_count); | |
797 | *decoded_options = new_decoded_options; | |
798 | *decoded_options_count = new_decoded_options_count; | |
14c7833c | 799 | } |
5f20c657 | 800 | |
481e1176 | 801 | /* Handle option DECODED for the language indicated by LANG_MASK, |
46625112 JM |
802 | using the handlers in HANDLERS and setting fields in OPTS. KIND is |
803 | the diagnostic_t if this is a diagnostics option, DK_UNSPECIFIED | |
804 | otherwise. Returns false if the switch was invalid. */ | |
5f20c657 JM |
805 | |
806 | bool | |
46625112 JM |
807 | handle_option (struct gcc_options *opts, |
808 | const struct cl_decoded_option *decoded, | |
5f20c657 JM |
809 | unsigned int lang_mask, int kind, |
810 | const struct cl_option_handlers *handlers) | |
811 | { | |
481e1176 JM |
812 | size_t opt_index = decoded->opt_index; |
813 | const char *arg = decoded->arg; | |
814 | int value = decoded->value; | |
5f20c657 | 815 | const struct cl_option *option = &cl_options[opt_index]; |
46625112 | 816 | void *flag_var = option_flag_var (opt_index, opts); |
5f20c657 JM |
817 | size_t i; |
818 | ||
46625112 JM |
819 | if (flag_var) |
820 | set_option (opts, opt_index, value, arg, kind); | |
5f20c657 JM |
821 | |
822 | for (i = 0; i < handlers->num_handlers; i++) | |
823 | if (option->flags & handlers->handlers[i].mask) | |
824 | { | |
46625112 | 825 | if (!handlers->handlers[i].handler (opts, decoded, |
5f20c657 JM |
826 | lang_mask, kind, handlers)) |
827 | return false; | |
828 | else | |
481e1176 | 829 | handlers->post_handling_callback (decoded, |
5f20c657 JM |
830 | handlers->handlers[i].mask); |
831 | } | |
832 | ||
833 | return true; | |
834 | } | |
835 | ||
481e1176 JM |
836 | /* Like handle_option, but OPT_INDEX, ARG and VALUE describe the |
837 | option instead of DECODED. This is used for callbacks when one | |
838 | option implies another instead of an option being decoded from the | |
839 | command line. */ | |
840 | ||
841 | bool | |
46625112 JM |
842 | handle_generated_option (struct gcc_options *opts, size_t opt_index, |
843 | const char *arg, int value, | |
481e1176 JM |
844 | unsigned int lang_mask, int kind, |
845 | const struct cl_option_handlers *handlers) | |
846 | { | |
481e1176 JM |
847 | struct cl_decoded_option decoded; |
848 | ||
d9d16a19 | 849 | generate_option (opt_index, arg, value, lang_mask, &decoded); |
46625112 | 850 | return handle_option (opts, &decoded, lang_mask, kind, handlers); |
d9d16a19 JM |
851 | } |
852 | ||
853 | /* Fill in *DECODED with an option described by OPT_INDEX, ARG and | |
854 | VALUE for a front end using LANG_MASK. This is used when the | |
855 | compiler generates options internally. */ | |
856 | ||
857 | void | |
858 | generate_option (size_t opt_index, const char *arg, int value, | |
859 | unsigned int lang_mask, struct cl_decoded_option *decoded) | |
860 | { | |
861 | const struct cl_option *option = &cl_options[opt_index]; | |
862 | ||
863 | decoded->opt_index = opt_index; | |
2d2bd949 | 864 | decoded->warn_message = NULL; |
d9d16a19 | 865 | decoded->arg = arg; |
d9d16a19 JM |
866 | decoded->value = value; |
867 | decoded->errors = (option_ok_for_language (option, lang_mask) | |
868 | ? 0 | |
869 | : CL_ERR_WRONG_LANG); | |
481e1176 | 870 | |
5de8299c JM |
871 | generate_canonical_option (opt_index, arg, value, decoded); |
872 | switch (decoded->canonical_option_num_elements) | |
481e1176 | 873 | { |
5de8299c JM |
874 | case 1: |
875 | decoded->orig_option_with_args_text = decoded->canonical_option[0]; | |
876 | break; | |
877 | ||
878 | case 2: | |
879 | decoded->orig_option_with_args_text | |
880 | = concat (decoded->canonical_option[0], " ", | |
881 | decoded->canonical_option[1], NULL); | |
882 | break; | |
883 | ||
884 | default: | |
885 | gcc_unreachable (); | |
481e1176 | 886 | } |
d9d16a19 | 887 | } |
481e1176 | 888 | |
d9d16a19 JM |
889 | /* Fill in *DECODED with an option for input file FILE. */ |
890 | ||
891 | void | |
892 | generate_option_input_file (const char *file, | |
893 | struct cl_decoded_option *decoded) | |
894 | { | |
895 | decoded->opt_index = OPT_SPECIAL_input_file; | |
2d2bd949 | 896 | decoded->warn_message = NULL; |
d9d16a19 JM |
897 | decoded->arg = file; |
898 | decoded->orig_option_with_args_text = file; | |
899 | decoded->canonical_option_num_elements = 1; | |
900 | decoded->canonical_option[0] = file; | |
901 | decoded->canonical_option[1] = NULL; | |
902 | decoded->canonical_option[2] = NULL; | |
903 | decoded->canonical_option[3] = NULL; | |
904 | decoded->value = 1; | |
905 | decoded->errors = 0; | |
481e1176 JM |
906 | } |
907 | ||
5f20c657 | 908 | /* Handle the switch DECODED for the language indicated by LANG_MASK, |
46625112 | 909 | using the handlers in *HANDLERS and setting fields in OPTS. */ |
5f20c657 JM |
910 | |
911 | void | |
46625112 JM |
912 | read_cmdline_option (struct gcc_options *opts, |
913 | struct cl_decoded_option *decoded, | |
5f20c657 JM |
914 | unsigned int lang_mask, |
915 | const struct cl_option_handlers *handlers) | |
916 | { | |
917 | const struct cl_option *option; | |
2d2bd949 JM |
918 | const char *opt = decoded->orig_option_with_args_text; |
919 | ||
920 | if (decoded->warn_message) | |
921 | warning (0, decoded->warn_message, opt); | |
5f20c657 JM |
922 | |
923 | if (decoded->opt_index == OPT_SPECIAL_unknown) | |
924 | { | |
481e1176 JM |
925 | if (handlers->unknown_option_callback (decoded)) |
926 | error ("unrecognized command line option %qs", decoded->arg); | |
5f20c657 JM |
927 | return; |
928 | } | |
929 | ||
2d2bd949 JM |
930 | if (decoded->opt_index == OPT_SPECIAL_ignore) |
931 | return; | |
932 | ||
5f20c657 | 933 | option = &cl_options[decoded->opt_index]; |
5f20c657 JM |
934 | |
935 | if (decoded->errors & CL_ERR_DISABLED) | |
936 | { | |
937 | error ("command line option %qs" | |
938 | " is not supported by this configuration", opt); | |
939 | return; | |
940 | } | |
941 | ||
942 | if (decoded->errors & CL_ERR_WRONG_LANG) | |
943 | { | |
481e1176 | 944 | handlers->wrong_lang_callback (decoded, lang_mask); |
5f20c657 JM |
945 | return; |
946 | } | |
947 | ||
948 | if (decoded->errors & CL_ERR_MISSING_ARG) | |
949 | { | |
950 | if (option->missing_argument_error) | |
951 | error (option->missing_argument_error, opt); | |
952 | else | |
953 | error ("missing argument to %qs", opt); | |
954 | return; | |
955 | } | |
956 | ||
957 | if (decoded->errors & CL_ERR_UINT_ARG) | |
958 | { | |
959 | error ("argument to %qs should be a non-negative integer", | |
960 | option->opt_text); | |
961 | return; | |
962 | } | |
963 | ||
964 | gcc_assert (!decoded->errors); | |
965 | ||
46625112 | 966 | if (!handle_option (opts, decoded, lang_mask, DK_UNSPECIFIED, handlers)) |
5f20c657 JM |
967 | error ("unrecognized command line option %qs", opt); |
968 | } | |
969 | ||
46625112 | 970 | /* Set any field in OPTS for option OPT_INDEX according to VALUE and ARG, |
5f20c657 JM |
971 | diagnostic kind KIND. */ |
972 | ||
973 | void | |
46625112 JM |
974 | set_option (struct gcc_options *opts, int opt_index, int value, |
975 | const char *arg, int kind) | |
5f20c657 JM |
976 | { |
977 | const struct cl_option *option = &cl_options[opt_index]; | |
46625112 | 978 | void *flag_var = option_flag_var (opt_index, opts); |
5f20c657 | 979 | |
46625112 | 980 | if (!flag_var) |
5f20c657 JM |
981 | return; |
982 | ||
983 | switch (option->var_type) | |
984 | { | |
985 | case CLVC_BOOLEAN: | |
46625112 | 986 | *(int *) flag_var = value; |
5f20c657 JM |
987 | break; |
988 | ||
989 | case CLVC_EQUAL: | |
46625112 JM |
990 | *(int *) flag_var = (value |
991 | ? option->var_value | |
992 | : !option->var_value); | |
5f20c657 JM |
993 | break; |
994 | ||
995 | case CLVC_BIT_CLEAR: | |
996 | case CLVC_BIT_SET: | |
997 | if ((value != 0) == (option->var_type == CLVC_BIT_SET)) | |
46625112 | 998 | *(int *) flag_var |= option->var_value; |
5f20c657 | 999 | else |
46625112 JM |
1000 | *(int *) flag_var &= ~option->var_value; |
1001 | if (flag_var == &target_flags) | |
5f20c657 JM |
1002 | target_flags_explicit |= option->var_value; |
1003 | break; | |
1004 | ||
1005 | case CLVC_STRING: | |
46625112 | 1006 | *(const char **) flag_var = arg; |
5f20c657 JM |
1007 | break; |
1008 | } | |
1009 | ||
1010 | if ((diagnostic_t) kind != DK_UNSPECIFIED) | |
1011 | diagnostic_classify_diagnostic (global_dc, opt_index, (diagnostic_t) kind, | |
1012 | UNKNOWN_LOCATION); | |
1013 | } | |
46625112 JM |
1014 | |
1015 | /* Return the address of the flag variable for option OPT_INDEX in | |
1016 | options structure OPTS, or NULL if there is no flag variable. */ | |
1017 | ||
1018 | void * | |
1019 | option_flag_var (int opt_index, struct gcc_options *opts) | |
1020 | { | |
1021 | const struct cl_option *option = &cl_options[opt_index]; | |
1022 | ||
1023 | if (option->flag_var_offset == (unsigned short) -1) | |
1024 | return NULL; | |
1025 | return (void *)(((char *) opts) + option->flag_var_offset); | |
1026 | } |