1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
27 /* Specifies how a switch's VAR_VALUE relates to its FLAG_VAR. */
29 /* The switch is enabled when FLAG_VAR is nonzero. */
32 /* The switch is enabled when FLAG_VAR == VAR_VALUE. */
35 /* The switch is enabled when VAR_VALUE is not set in FLAG_VAR. */
38 /* The switch is enabled when VAR_VALUE is set in FLAG_VAR. */
41 /* The switch takes a string argument and FLAG_VAR points to that
45 /* The switch takes an enumerated argument (VAR_ENUM says what
46 enumeration) and FLAG_VAR points to that argument. */
49 /* The switch should be stored in the VEC pointed to by FLAG_VAR for
58 const char *missing_argument_error;
59 const char *warn_message;
60 const char *alias_arg;
61 const char *neg_alias_arg;
62 unsigned short alias_target;
63 unsigned short back_chain;
64 unsigned char opt_len;
67 unsigned short flag_var_offset;
68 unsigned short var_enum;
69 enum cl_var_type var_type;
73 /* Records that the state of an option consists of SIZE bytes starting
74 at DATA. DATA might point to CH in some cases. */
75 struct cl_option_state {
81 extern const struct cl_option cl_options[];
82 extern const unsigned int cl_options_count;
83 extern const char *const lang_names[];
84 extern const unsigned int cl_lang_count;
86 #define CL_PARAMS (1U << 11) /* Fake entry. Used to display --param info with --help. */
87 #define CL_WARNING (1U << 12) /* Enables an (optional) warning message. */
88 #define CL_OPTIMIZATION (1U << 13) /* Enables an (optional) optimization. */
89 #define CL_DRIVER (1U << 14) /* Driver option. */
90 #define CL_TARGET (1U << 15) /* Target-specific option. */
91 #define CL_COMMON (1U << 16) /* Language-independent. */
93 #define CL_MIN_OPTION_CLASS CL_PARAMS
94 #define CL_MAX_OPTION_CLASS CL_COMMON
96 /* From here on the bits describe attributes of the options.
97 Before this point the bits have described the class of the option.
98 This distinction is important because --help will not list options
99 which only have these higher bits set. */
101 /* Options marked with CL_SEPARATE take a number of separate arguments
102 (1 to 4) that is one more than the number in this bit-field. */
103 #define CL_SEPARATE_NARGS_SHIFT 17
104 #define CL_SEPARATE_NARGS_MASK (3U << CL_SEPARATE_NARGS_SHIFT)
106 #define CL_SEPARATE_ALIAS (1U << 19) /* Option is an alias when used with separate argument. */
107 #define CL_NO_DRIVER_ARG (1U << 20) /* Option takes no argument in the driver. */
108 #define CL_REJECT_DRIVER (1U << 21) /* Reject this option in the driver. */
109 #define CL_SAVE (1U << 22) /* Target-specific option for attribute. */
110 #define CL_DISABLED (1U << 23) /* Disabled in this configuration. */
111 #define CL_REPORT (1U << 24) /* Report argument with -fverbose-asm */
112 #define CL_JOINED (1U << 25) /* If takes joined argument. */
113 #define CL_SEPARATE (1U << 26) /* If takes a separate argument. */
114 #define CL_REJECT_NEGATIVE (1U << 27) /* Reject no- form. */
115 #define CL_MISSING_OK (1U << 28) /* Missing argument OK (joined). */
116 #define CL_UINTEGER (1U << 29) /* Argument is an integer >=0. */
117 #define CL_UNDOCUMENTED (1U << 30) /* Do not output with --help. */
118 #define CL_NEGATIVE_ALIAS (1U << 31) /* Alias to negative form of option. */
120 /* Flags for an enumerated option argument. */
121 #define CL_ENUM_CANONICAL (1 << 0) /* Canonical for this value. */
122 #define CL_ENUM_DRIVER_ONLY (1 << 1) /* Only accepted in the driver. */
124 /* Structure describing an enumerated option argument. */
128 /* The argument text, or NULL at the end of the array. */
131 /* The corresponding integer value. */
134 /* Flags associated with this argument. */
138 /* Structure describing an enumerated set of option arguments. */
142 /* Help text, or NULL if the values should not be listed in --help
146 /* Error message for unknown arguments, or NULL to use a generic
148 const char *unknown_error;
150 /* Array of possible values. */
151 const struct cl_enum_arg *values;
153 /* The size of the type used to store a value. */
156 /* Function to set a variable of this type. */
157 void (*set) (void *var, int value);
159 /* Function to get the value of a variable of this type. */
160 int (*get) (const void *var);
163 extern const struct cl_enum cl_enums[];
164 extern const unsigned int cl_enums_count;
166 /* Possible ways in which a command-line option may be erroneous.
167 These do not include not being known at all; an option index of
168 OPT_SPECIAL_unknown is used for that. */
170 #define CL_ERR_DISABLED (1 << 0) /* Disabled in this configuration. */
171 #define CL_ERR_MISSING_ARG (1 << 1) /* Argument required but missing. */
172 #define CL_ERR_WRONG_LANG (1 << 2) /* Option for wrong language. */
173 #define CL_ERR_UINT_ARG (1 << 3) /* Bad unsigned integer argument. */
174 #define CL_ERR_ENUM_ARG (1 << 4) /* Bad enumerated argument. */
175 #define CL_ERR_NEGATIVE (1 << 5) /* Negative form of option
176 not permitted (together
177 with OPT_SPECIAL_unknown). */
179 /* Structure describing the result of decoding an option. */
181 struct cl_decoded_option
183 /* The index of this option, or an OPT_SPECIAL_* value for
184 non-options and unknown options. */
187 /* Any warning to give for use of this option, or NULL if none. */
188 const char *warn_message;
190 /* The string argument, or NULL if none. For OPT_SPECIAL_* cases,
191 the option or non-option command-line argument. */
194 /* The original text of option plus arguments, with separate argv
195 elements concatenated into one string with spaces separating
196 them. This is for such uses as diagnostics and
197 -frecord-gcc-switches. */
198 const char *orig_option_with_args_text;
200 /* The canonical form of the option and its argument, for when it is
201 necessary to reconstruct argv elements (in particular, for
202 processing specs and passing options to subprocesses from the
204 const char *canonical_option[4];
206 /* The number of elements in the canonical form of the option and
207 arguments; always at least 1. */
208 size_t canonical_option_num_elements;
210 /* For a boolean option, 1 for the true case and 0 for the "no-"
211 case. For an unsigned integer option, the value of the
212 argument. 1 in all other cases. */
215 /* Any flags describing errors detected in this option. */
219 /* Structure describing an option deferred for handling after the main
224 /* Elements from struct cl_decoded_option used for deferred
229 } cl_deferred_option;
230 DEF_VEC_O(cl_deferred_option);
231 DEF_VEC_ALLOC_O(cl_deferred_option,heap);
233 /* Structure describing a single option-handling callback. */
235 struct cl_option_handler_func
237 /* The function called to handle the option. */
238 bool (*handler) (struct gcc_options *opts,
239 struct gcc_options *opts_set,
240 const struct cl_decoded_option *decoded,
241 unsigned int lang_mask, int kind, location_t loc,
242 const struct cl_option_handlers *handlers,
243 diagnostic_context *dc);
245 /* The mask that must have some bit in common with the flags for the
246 option for this particular handler to be used. */
250 /* Structure describing the callbacks used in handling options. */
252 struct cl_option_handlers
254 /* Callback for an unknown option to determine whether to give an
255 error for it, and possibly store information to diagnose the
256 option at a later point. Return true if an error should be
257 given, false otherwise. */
258 bool (*unknown_option_callback) (const struct cl_decoded_option *decoded);
260 /* Callback to handle, and possibly diagnose, an option for another
262 void (*wrong_lang_callback) (const struct cl_decoded_option *decoded,
263 unsigned int lang_mask);
265 /* Callback to call after the successful handling of any option. */
266 void (*post_handling_callback) (const struct cl_decoded_option *decoded,
269 /* The number of individual handlers. */
272 /* The handlers themselves. */
273 struct cl_option_handler_func handlers[3];
276 /* Input file names. */
278 extern const char **in_fnames;
280 /* The count of input filenames. */
282 extern unsigned num_in_fnames;
284 size_t find_opt (const char *input, unsigned int lang_mask);
285 extern int integral_argument (const char *arg);
286 extern bool enum_value_to_arg (const struct cl_enum_arg *enum_args,
287 const char **argp, int value,
288 unsigned int lang_mask);
289 extern void decode_cmdline_options_to_array (unsigned int argc,
291 unsigned int lang_mask,
292 struct cl_decoded_option **decoded_options,
293 unsigned int *decoded_options_count);
294 extern void init_options_once (void);
295 extern void init_options_struct (struct gcc_options *opts,
296 struct gcc_options *opts_set);
297 extern void decode_cmdline_options_to_array_default_mask (unsigned int argc,
299 struct cl_decoded_option **decoded_options,
300 unsigned int *decoded_options_count);
301 extern void set_default_handlers (struct cl_option_handlers *handlers);
302 extern void decode_options (struct gcc_options *opts,
303 struct gcc_options *opts_set,
304 struct cl_decoded_option *decoded_options,
305 unsigned int decoded_options_count,
307 diagnostic_context *dc);
308 extern int option_enabled (int opt_idx, void *opts);
309 extern bool get_option_state (struct gcc_options *, int,
310 struct cl_option_state *);
311 extern void set_option (struct gcc_options *opts,
312 struct gcc_options *opts_set,
313 int opt_index, int value, const char *arg, int kind,
314 location_t loc, diagnostic_context *dc);
315 extern void *option_flag_var (int opt_index, struct gcc_options *opts);
316 bool handle_generated_option (struct gcc_options *opts,
317 struct gcc_options *opts_set,
318 size_t opt_index, const char *arg, int value,
319 unsigned int lang_mask, int kind, location_t loc,
320 const struct cl_option_handlers *handlers,
321 diagnostic_context *dc);
322 void generate_option (size_t opt_index, const char *arg, int value,
323 unsigned int lang_mask,
324 struct cl_decoded_option *decoded);
325 void generate_option_input_file (const char *file,
326 struct cl_decoded_option *decoded);
327 extern void read_cmdline_option (struct gcc_options *opts,
328 struct gcc_options *opts_set,
329 struct cl_decoded_option *decoded,
331 unsigned int lang_mask,
332 const struct cl_option_handlers *handlers,
333 diagnostic_context *dc);
334 extern void control_warning_option (unsigned int opt_index, int kind,
335 bool imply, location_t loc,
336 unsigned int lang_mask,
337 const struct cl_option_handlers *handlers,
338 struct gcc_options *opts,
339 struct gcc_options *opts_set,
340 diagnostic_context *dc);
341 extern void print_ignored_options (void);
342 extern void handle_common_deferred_options (void);
343 extern bool common_handle_option (struct gcc_options *opts,
344 struct gcc_options *opts_set,
345 const struct cl_decoded_option *decoded,
346 unsigned int lang_mask, int kind,
348 const struct cl_option_handlers *handlers,
349 diagnostic_context *dc);
350 extern bool target_handle_option (struct gcc_options *opts,
351 struct gcc_options *opts_set,
352 const struct cl_decoded_option *decoded,
353 unsigned int lang_mask, int kind,
355 const struct cl_option_handlers *handlers,
356 diagnostic_context *dc);
357 extern void finish_options (struct gcc_options *opts,
358 struct gcc_options *opts_set,
360 extern void default_options_optimization (struct gcc_options *opts,
361 struct gcc_options *opts_set,
362 struct cl_decoded_option *decoded_options,
363 unsigned int decoded_options_count,
365 unsigned int lang_mask,
366 const struct cl_option_handlers *handlers,
367 diagnostic_context *dc);
368 extern void set_struct_debug_option (struct gcc_options *opts,