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5457b645 | 1 | /* Command line option handling. |
d353bf18 | 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
5457b645 | 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 | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
5457b645 | 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 | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
5457b645 | 19 | |
20 | #ifndef GCC_OPTS_H | |
21 | #define GCC_OPTS_H | |
22 | ||
ba30d337 | 23 | #include "obstack.h" |
3c6c0e40 | 24 | |
ff05e09e | 25 | /* Specifies how a switch's VAR_VALUE relates to its FLAG_VAR. */ |
0fe44c73 | 26 | enum cl_var_type { |
ff05e09e | 27 | /* The switch is enabled when FLAG_VAR is nonzero. */ |
28 | CLVC_BOOLEAN, | |
29 | ||
30 | /* The switch is enabled when FLAG_VAR == VAR_VALUE. */ | |
31 | CLVC_EQUAL, | |
32 | ||
33 | /* The switch is enabled when VAR_VALUE is not set in FLAG_VAR. */ | |
34 | CLVC_BIT_CLEAR, | |
35 | ||
36 | /* The switch is enabled when VAR_VALUE is set in FLAG_VAR. */ | |
0fe44c73 | 37 | CLVC_BIT_SET, |
38 | ||
39 | /* The switch takes a string argument and FLAG_VAR points to that | |
40 | argument. */ | |
f0da0668 | 41 | CLVC_STRING, |
42 | ||
d62a5950 | 43 | /* The switch takes an enumerated argument (VAR_ENUM says what |
44 | enumeration) and FLAG_VAR points to that argument. */ | |
45 | CLVC_ENUM, | |
46 | ||
f0da0668 | 47 | /* The switch should be stored in the VEC pointed to by FLAG_VAR for |
48 | later processing. */ | |
49 | CLVC_DEFER | |
ff05e09e | 50 | }; |
5457b645 | 51 | |
55da3817 | 52 | struct cl_option |
53 | { | |
ec840af4 | 54 | /* Text of the option, including initial '-'. */ |
55da3817 | 55 | const char *opt_text; |
ec840af4 | 56 | /* Help text for --help, or NULL. */ |
53b8e5c1 | 57 | const char *help; |
ec840af4 | 58 | /* Error message for missing argument, or NULL. */ |
fecf9011 | 59 | const char *missing_argument_error; |
ec840af4 | 60 | /* Warning to give when this option is used, or NULL. */ |
3b0273a1 | 61 | const char *warn_message; |
ec840af4 | 62 | /* Argument of alias target when positive option given, or NULL. */ |
67089c6b | 63 | const char *alias_arg; |
ec840af4 | 64 | /* Argument of alias target when negative option given, or NULL. */ |
67089c6b | 65 | const char *neg_alias_arg; |
ec840af4 | 66 | /* Alias target, or N_OPTS if not an alias. */ |
67089c6b | 67 | unsigned short alias_target; |
ec840af4 | 68 | /* Previous option that is an initial substring of this one, or |
69 | N_OPTS if none. */ | |
6b1f09ff | 70 | unsigned short back_chain; |
ec840af4 | 71 | /* Option length, not including initial '-'. */ |
55da3817 | 72 | unsigned char opt_len; |
ec840af4 | 73 | /* Next option in a sequence marked with Negative, or -1 if none. */ |
a1baa5f1 | 74 | int neg_index; |
ec840af4 | 75 | /* CL_* flags for this option. */ |
3272db82 | 76 | unsigned int flags; |
ec840af4 | 77 | /* Disabled in this configuration. */ |
78 | BOOL_BITFIELD cl_disabled : 1; | |
79 | /* Options marked with CL_SEPARATE take a number of separate | |
80 | arguments (1 to 4) that is one more than the number in this | |
81 | bit-field. */ | |
82 | unsigned int cl_separate_nargs : 2; | |
83 | /* Option is an alias when used with separate argument. */ | |
84 | BOOL_BITFIELD cl_separate_alias : 1; | |
85 | /* Alias to negative form of option. */ | |
86 | BOOL_BITFIELD cl_negative_alias : 1; | |
87 | /* Option takes no argument in the driver. */ | |
88 | BOOL_BITFIELD cl_no_driver_arg : 1; | |
89 | /* Reject this option in the driver. */ | |
90 | BOOL_BITFIELD cl_reject_driver : 1; | |
91 | /* Reject no- form. */ | |
92 | BOOL_BITFIELD cl_reject_negative : 1; | |
93 | /* Missing argument OK (joined). */ | |
94 | BOOL_BITFIELD cl_missing_ok : 1; | |
95 | /* Argument is an integer >=0. */ | |
96 | BOOL_BITFIELD cl_uinteger : 1; | |
72ec6882 | 97 | /* Argument is a HOST_WIDE_INT. */ |
98 | BOOL_BITFIELD cl_host_wide_int : 1; | |
cb14e058 | 99 | /* Argument should be converted to lowercase. */ |
100 | BOOL_BITFIELD cl_tolower : 1; | |
ec840af4 | 101 | /* Report argument with -fverbose-asm */ |
102 | BOOL_BITFIELD cl_report : 1; | |
103 | /* Offset of field for this option in struct gcc_options, or | |
104 | (unsigned short) -1 if none. */ | |
2c5d2e39 | 105 | unsigned short flag_var_offset; |
ec840af4 | 106 | /* Index in cl_enums of enum used for this option's arguments, for |
107 | CLVC_ENUM options. */ | |
d62a5950 | 108 | unsigned short var_enum; |
ec840af4 | 109 | /* How this option's value is determined and sets a field. */ |
0fe44c73 | 110 | enum cl_var_type var_type; |
ec840af4 | 111 | /* Value or bit-mask with which to set a field. */ |
72ec6882 | 112 | HOST_WIDE_INT var_value; |
55da3817 | 113 | }; |
114 | ||
7abcc497 | 115 | /* Records that the state of an option consists of SIZE bytes starting |
116 | at DATA. DATA might point to CH in some cases. */ | |
117 | struct cl_option_state { | |
118 | const void *data; | |
119 | size_t size; | |
120 | char ch; | |
121 | }; | |
122 | ||
55da3817 | 123 | extern const struct cl_option cl_options[]; |
124 | extern const unsigned int cl_options_count; | |
9cf6679e | 125 | extern const char *const lang_names[]; |
87c75316 | 126 | extern const unsigned int cl_lang_count; |
55da3817 | 127 | |
634b1f85 | 128 | #define CL_PARAMS (1U << 16) /* Fake entry. Used to display --param info with --help. */ |
129 | #define CL_WARNING (1U << 17) /* Enables an (optional) warning message. */ | |
130 | #define CL_OPTIMIZATION (1U << 18) /* Enables an (optional) optimization. */ | |
131 | #define CL_DRIVER (1U << 19) /* Driver option. */ | |
132 | #define CL_TARGET (1U << 20) /* Target-specific option. */ | |
133 | #define CL_COMMON (1U << 21) /* Language-independent. */ | |
151ef6b4 | 134 | |
135 | #define CL_MIN_OPTION_CLASS CL_PARAMS | |
87c75316 | 136 | #define CL_MAX_OPTION_CLASS CL_COMMON |
137 | ||
138 | /* From here on the bits describe attributes of the options. | |
139 | Before this point the bits have described the class of the option. | |
140 | This distinction is important because --help will not list options | |
141 | which only have these higher bits set. */ | |
142 | ||
634b1f85 | 143 | #define CL_JOINED (1U << 22) /* If takes joined argument. */ |
144 | #define CL_SEPARATE (1U << 23) /* If takes a separate argument. */ | |
145 | #define CL_UNDOCUMENTED (1U << 24) /* Do not output with --help. */ | |
3fe1aabe | 146 | #define CL_NO_DWARF_RECORD (1U << 25) /* Do not add to producer string. */ |
d8f2baf5 | 147 | #define CL_PCH_IGNORE (1U << 26) /* Do compare state for pch. */ |
5457b645 | 148 | |
d62a5950 | 149 | /* Flags for an enumerated option argument. */ |
150 | #define CL_ENUM_CANONICAL (1 << 0) /* Canonical for this value. */ | |
151 | #define CL_ENUM_DRIVER_ONLY (1 << 1) /* Only accepted in the driver. */ | |
152 | ||
153 | /* Structure describing an enumerated option argument. */ | |
154 | ||
155 | struct cl_enum_arg | |
156 | { | |
157 | /* The argument text, or NULL at the end of the array. */ | |
158 | const char *arg; | |
159 | ||
160 | /* The corresponding integer value. */ | |
161 | int value; | |
162 | ||
163 | /* Flags associated with this argument. */ | |
164 | unsigned int flags; | |
165 | }; | |
166 | ||
167 | /* Structure describing an enumerated set of option arguments. */ | |
168 | ||
169 | struct cl_enum | |
170 | { | |
171 | /* Help text, or NULL if the values should not be listed in --help | |
172 | output. */ | |
173 | const char *help; | |
174 | ||
175 | /* Error message for unknown arguments, or NULL to use a generic | |
176 | error. */ | |
177 | const char *unknown_error; | |
178 | ||
179 | /* Array of possible values. */ | |
180 | const struct cl_enum_arg *values; | |
181 | ||
182 | /* The size of the type used to store a value. */ | |
183 | size_t var_size; | |
184 | ||
185 | /* Function to set a variable of this type. */ | |
186 | void (*set) (void *var, int value); | |
187 | ||
188 | /* Function to get the value of a variable of this type. */ | |
189 | int (*get) (const void *var); | |
190 | }; | |
191 | ||
192 | extern const struct cl_enum cl_enums[]; | |
193 | extern const unsigned int cl_enums_count; | |
194 | ||
06907f25 | 195 | /* Possible ways in which a command-line option may be erroneous. |
196 | These do not include not being known at all; an option index of | |
615ef0bb | 197 | OPT_SPECIAL_unknown is used for that. */ |
06907f25 | 198 | |
199 | #define CL_ERR_DISABLED (1 << 0) /* Disabled in this configuration. */ | |
200 | #define CL_ERR_MISSING_ARG (1 << 1) /* Argument required but missing. */ | |
201 | #define CL_ERR_WRONG_LANG (1 << 2) /* Option for wrong language. */ | |
202 | #define CL_ERR_UINT_ARG (1 << 3) /* Bad unsigned integer argument. */ | |
d62a5950 | 203 | #define CL_ERR_ENUM_ARG (1 << 4) /* Bad enumerated argument. */ |
204 | #define CL_ERR_NEGATIVE (1 << 5) /* Negative form of option | |
19c8675b | 205 | not permitted (together |
206 | with OPT_SPECIAL_unknown). */ | |
06907f25 | 207 | |
208 | /* Structure describing the result of decoding an option. */ | |
209 | ||
210 | struct cl_decoded_option | |
211 | { | |
615ef0bb | 212 | /* The index of this option, or an OPT_SPECIAL_* value for |
213 | non-options and unknown options. */ | |
06907f25 | 214 | size_t opt_index; |
215 | ||
3b0273a1 | 216 | /* Any warning to give for use of this option, or NULL if none. */ |
217 | const char *warn_message; | |
218 | ||
615ef0bb | 219 | /* The string argument, or NULL if none. For OPT_SPECIAL_* cases, |
220 | the option or non-option command-line argument. */ | |
06907f25 | 221 | const char *arg; |
222 | ||
615ef0bb | 223 | /* The original text of option plus arguments, with separate argv |
224 | elements concatenated into one string with spaces separating | |
225 | them. This is for such uses as diagnostics and | |
226 | -frecord-gcc-switches. */ | |
227 | const char *orig_option_with_args_text; | |
228 | ||
e88d34f6 | 229 | /* The canonical form of the option and its argument, for when it is |
230 | necessary to reconstruct argv elements (in particular, for | |
231 | processing specs and passing options to subprocesses from the | |
71a2f35e | 232 | driver). */ |
233 | const char *canonical_option[4]; | |
234 | ||
235 | /* The number of elements in the canonical form of the option and | |
236 | arguments; always at least 1. */ | |
237 | size_t canonical_option_num_elements; | |
e88d34f6 | 238 | |
06907f25 | 239 | /* For a boolean option, 1 for the true case and 0 for the "no-" |
240 | case. For an unsigned integer option, the value of the | |
241 | argument. 1 in all other cases. */ | |
242 | int value; | |
243 | ||
244 | /* Any flags describing errors detected in this option. */ | |
245 | int errors; | |
246 | }; | |
247 | ||
f0da0668 | 248 | /* Structure describing an option deferred for handling after the main |
249 | option handlers. */ | |
250 | ||
b3e7c666 | 251 | struct cl_deferred_option |
f0da0668 | 252 | { |
253 | /* Elements from struct cl_decoded_option used for deferred | |
254 | options. */ | |
255 | size_t opt_index; | |
256 | const char *arg; | |
257 | int value; | |
b3e7c666 | 258 | }; |
f0da0668 | 259 | |
b78351e5 | 260 | /* Structure describing a single option-handling callback. */ |
261 | ||
262 | struct cl_option_handler_func | |
263 | { | |
264 | /* The function called to handle the option. */ | |
2c5d2e39 | 265 | bool (*handler) (struct gcc_options *opts, |
f83b64ca | 266 | struct gcc_options *opts_set, |
2c5d2e39 | 267 | const struct cl_decoded_option *decoded, |
3c6c0e40 | 268 | unsigned int lang_mask, int kind, location_t loc, |
6bd9d862 | 269 | const struct cl_option_handlers *handlers, |
270 | diagnostic_context *dc); | |
b78351e5 | 271 | |
272 | /* The mask that must have some bit in common with the flags for the | |
273 | option for this particular handler to be used. */ | |
274 | unsigned int mask; | |
275 | }; | |
276 | ||
277 | /* Structure describing the callbacks used in handling options. */ | |
278 | ||
279 | struct cl_option_handlers | |
280 | { | |
281 | /* Callback for an unknown option to determine whether to give an | |
282 | error for it, and possibly store information to diagnose the | |
283 | option at a later point. Return true if an error should be | |
284 | given, false otherwise. */ | |
666f4bf0 | 285 | bool (*unknown_option_callback) (const struct cl_decoded_option *decoded); |
b78351e5 | 286 | |
287 | /* Callback to handle, and possibly diagnose, an option for another | |
288 | language. */ | |
666f4bf0 | 289 | void (*wrong_lang_callback) (const struct cl_decoded_option *decoded, |
b78351e5 | 290 | unsigned int lang_mask); |
291 | ||
b78351e5 | 292 | /* The number of individual handlers. */ |
293 | size_t num_handlers; | |
294 | ||
295 | /* The handlers themselves. */ | |
296 | struct cl_option_handler_func handlers[3]; | |
297 | }; | |
298 | ||
7981458e | 299 | /* Input file names. */ |
dcfa26d9 | 300 | |
301 | extern const char **in_fnames; | |
302 | ||
7981458e | 303 | /* The count of input filenames. */ |
dcfa26d9 | 304 | |
305 | extern unsigned num_in_fnames; | |
306 | ||
ba30d337 | 307 | extern char *opts_concat (const char *first, ...); |
308 | ||
309 | /* Obstack for option strings. */ | |
310 | ||
311 | extern struct obstack opts_obstack; | |
312 | ||
607eb2c8 | 313 | size_t find_opt (const char *input, unsigned int lang_mask); |
06907f25 | 314 | extern int integral_argument (const char *arg); |
d62a5950 | 315 | extern bool enum_value_to_arg (const struct cl_enum_arg *enum_args, |
316 | const char **argp, int value, | |
317 | unsigned int lang_mask); | |
615ef0bb | 318 | extern void decode_cmdline_options_to_array (unsigned int argc, |
319 | const char **argv, | |
320 | unsigned int lang_mask, | |
321 | struct cl_decoded_option **decoded_options, | |
322 | unsigned int *decoded_options_count); | |
f3f006ad | 323 | extern void init_options_once (void); |
324 | extern void init_options_struct (struct gcc_options *opts, | |
325 | struct gcc_options *opts_set); | |
d7be771e | 326 | extern void finalize_options_struct (struct gcc_options *opts); |
f3f006ad | 327 | extern void decode_cmdline_options_to_array_default_mask (unsigned int argc, |
328 | const char **argv, | |
329 | struct cl_decoded_option **decoded_options, | |
330 | unsigned int *decoded_options_count); | |
c123f04d | 331 | extern void set_default_handlers (struct cl_option_handlers *handlers); |
f3f006ad | 332 | extern void decode_options (struct gcc_options *opts, |
333 | struct gcc_options *opts_set, | |
334 | struct cl_decoded_option *decoded_options, | |
6bd9d862 | 335 | unsigned int decoded_options_count, |
3c6c0e40 | 336 | location_t loc, |
6bd9d862 | 337 | diagnostic_context *dc); |
2c5d2e39 | 338 | extern int option_enabled (int opt_idx, void *opts); |
339 | extern bool get_option_state (struct gcc_options *, int, | |
340 | struct cl_option_state *); | |
f83b64ca | 341 | extern void set_option (struct gcc_options *opts, |
342 | struct gcc_options *opts_set, | |
24ca3b4e | 343 | int opt_index, int value, const char *arg, int kind, |
3c6c0e40 | 344 | location_t loc, diagnostic_context *dc); |
2c5d2e39 | 345 | extern void *option_flag_var (int opt_index, struct gcc_options *opts); |
2c5d2e39 | 346 | bool handle_generated_option (struct gcc_options *opts, |
f83b64ca | 347 | struct gcc_options *opts_set, |
2c5d2e39 | 348 | size_t opt_index, const char *arg, int value, |
3c6c0e40 | 349 | unsigned int lang_mask, int kind, location_t loc, |
24ca3b4e | 350 | const struct cl_option_handlers *handlers, |
351 | diagnostic_context *dc); | |
cb22f930 | 352 | void generate_option (size_t opt_index, const char *arg, int value, |
353 | unsigned int lang_mask, | |
354 | struct cl_decoded_option *decoded); | |
355 | void generate_option_input_file (const char *file, | |
356 | struct cl_decoded_option *decoded); | |
2c5d2e39 | 357 | extern void read_cmdline_option (struct gcc_options *opts, |
f83b64ca | 358 | struct gcc_options *opts_set, |
2c5d2e39 | 359 | struct cl_decoded_option *decoded, |
3c6c0e40 | 360 | location_t loc, |
b78351e5 | 361 | unsigned int lang_mask, |
24ca3b4e | 362 | const struct cl_option_handlers *handlers, |
363 | diagnostic_context *dc); | |
c123f04d | 364 | extern void control_warning_option (unsigned int opt_index, int kind, |
365 | bool imply, location_t loc, | |
366 | unsigned int lang_mask, | |
367 | const struct cl_option_handlers *handlers, | |
368 | struct gcc_options *opts, | |
369 | struct gcc_options *opts_set, | |
370 | diagnostic_context *dc); | |
ddb48b82 | 371 | extern void print_ignored_options (void); |
f0da0668 | 372 | extern void handle_common_deferred_options (void); |
79396169 | 373 | extern bool common_handle_option (struct gcc_options *opts, |
374 | struct gcc_options *opts_set, | |
375 | const struct cl_decoded_option *decoded, | |
376 | unsigned int lang_mask, int kind, | |
377 | location_t loc, | |
378 | const struct cl_option_handlers *handlers, | |
379 | diagnostic_context *dc); | |
380 | extern bool target_handle_option (struct gcc_options *opts, | |
381 | struct gcc_options *opts_set, | |
382 | const struct cl_decoded_option *decoded, | |
383 | unsigned int lang_mask, int kind, | |
384 | location_t loc, | |
385 | const struct cl_option_handlers *handlers, | |
386 | diagnostic_context *dc); | |
387 | extern void finish_options (struct gcc_options *opts, | |
9faf44d6 | 388 | struct gcc_options *opts_set, |
389 | location_t loc); | |
79396169 | 390 | extern void default_options_optimization (struct gcc_options *opts, |
391 | struct gcc_options *opts_set, | |
392 | struct cl_decoded_option *decoded_options, | |
393 | unsigned int decoded_options_count, | |
394 | location_t loc, | |
395 | unsigned int lang_mask, | |
396 | const struct cl_option_handlers *handlers, | |
397 | diagnostic_context *dc); | |
9faf44d6 | 398 | extern void set_struct_debug_option (struct gcc_options *opts, |
399 | location_t loc, | |
400 | const char *value); | |
9105695c | 401 | extern bool opt_enum_arg_to_value (size_t opt_index, const char *arg, |
402 | int *value, unsigned int lang_mask); | |
5457b645 | 403 | #endif |