1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
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/>. */
26 /* Specifies how a switch's VAR_VALUE relates to its FLAG_VAR. */
28 /* The switch is enabled when FLAG_VAR is nonzero. */
31 /* The switch is enabled when FLAG_VAR == VAR_VALUE. */
34 /* The switch is enabled when VAR_VALUE is not set in FLAG_VAR. */
37 /* The switch is enabled when VAR_VALUE is set in FLAG_VAR. */
40 /* The switch takes a string argument and FLAG_VAR points to that
49 const char *missing_argument_error;
50 const char *warn_message;
51 const char *alias_arg;
52 const char *neg_alias_arg;
53 unsigned short alias_target;
54 unsigned short back_chain;
55 unsigned char opt_len;
58 unsigned short flag_var_offset;
59 enum cl_var_type var_type;
63 /* Records that the state of an option consists of SIZE bytes starting
64 at DATA. DATA might point to CH in some cases. */
65 struct cl_option_state {
71 extern const struct cl_option cl_options[];
72 extern const unsigned int cl_options_count;
73 extern const char *const lang_names[];
74 extern const unsigned int cl_lang_count;
76 #define CL_PARAMS (1 << 11) /* Fake entry. Used to display --param info with --help. */
77 #define CL_WARNING (1 << 12) /* Enables an (optional) warning message. */
78 #define CL_OPTIMIZATION (1 << 13) /* Enables an (optional) optimization. */
79 #define CL_DRIVER (1 << 14) /* Driver option. */
80 #define CL_TARGET (1 << 15) /* Target-specific option. */
81 #define CL_COMMON (1 << 16) /* Language-independent. */
83 #define CL_MIN_OPTION_CLASS CL_PARAMS
84 #define CL_MAX_OPTION_CLASS CL_COMMON
86 /* From here on the bits describe attributes of the options.
87 Before this point the bits have described the class of the option.
88 This distinction is important because --help will not list options
89 which only have these higher bits set. */
91 /* Options marked with CL_SEPARATE take a number of separate arguments
92 (1 to 4) that is one more than the number in this bit-field. */
93 #define CL_SEPARATE_NARGS_SHIFT 17
94 #define CL_SEPARATE_NARGS_MASK (3 << CL_SEPARATE_NARGS_SHIFT)
96 #define CL_SEPARATE_ALIAS (1 << 19) /* Option is an alias when used with separate argument. */
97 #define CL_NO_DRIVER_ARG (1 << 20) /* Option takes no argument in the driver. */
98 #define CL_REJECT_DRIVER (1 << 21) /* Reject this option in the driver. */
99 #define CL_SAVE (1 << 22) /* Target-specific option for attribute. */
100 #define CL_DISABLED (1 << 23) /* Disabled in this configuration. */
101 #define CL_REPORT (1 << 24) /* Report argument with -fverbose-asm */
102 #define CL_JOINED (1 << 25) /* If takes joined argument. */
103 #define CL_SEPARATE (1 << 26) /* If takes a separate argument. */
104 #define CL_REJECT_NEGATIVE (1 << 27) /* Reject no- form. */
105 #define CL_MISSING_OK (1 << 28) /* Missing argument OK (joined). */
106 #define CL_UINTEGER (1 << 29) /* Argument is an integer >=0. */
107 #define CL_UNDOCUMENTED (1 << 30) /* Do not output with --help. */
109 /* Possible ways in which a command-line option may be erroneous.
110 These do not include not being known at all; an option index of
111 OPT_SPECIAL_unknown is used for that. */
113 #define CL_ERR_DISABLED (1 << 0) /* Disabled in this configuration. */
114 #define CL_ERR_MISSING_ARG (1 << 1) /* Argument required but missing. */
115 #define CL_ERR_WRONG_LANG (1 << 2) /* Option for wrong language. */
116 #define CL_ERR_UINT_ARG (1 << 3) /* Bad unsigned integer argument. */
117 #define CL_ERR_NEGATIVE (1 << 4) /* Negative form of option
118 not permitted (together
119 with OPT_SPECIAL_unknown). */
121 /* Structure describing the result of decoding an option. */
123 struct cl_decoded_option
125 /* The index of this option, or an OPT_SPECIAL_* value for
126 non-options and unknown options. */
129 /* Any warning to give for use of this option, or NULL if none. */
130 const char *warn_message;
132 /* The string argument, or NULL if none. For OPT_SPECIAL_* cases,
133 the option or non-option command-line argument. */
136 /* The original text of option plus arguments, with separate argv
137 elements concatenated into one string with spaces separating
138 them. This is for such uses as diagnostics and
139 -frecord-gcc-switches. */
140 const char *orig_option_with_args_text;
142 /* The canonical form of the option and its argument, for when it is
143 necessary to reconstruct argv elements (in particular, for
144 processing specs and passing options to subprocesses from the
146 const char *canonical_option[4];
148 /* The number of elements in the canonical form of the option and
149 arguments; always at least 1. */
150 size_t canonical_option_num_elements;
152 /* For a boolean option, 1 for the true case and 0 for the "no-"
153 case. For an unsigned integer option, the value of the
154 argument. 1 in all other cases. */
157 /* Any flags describing errors detected in this option. */
161 /* Structure describing a single option-handling callback. */
163 struct cl_option_handler_func
165 /* The function called to handle the option. */
166 bool (*handler) (struct gcc_options *opts,
167 struct gcc_options *opts_set,
168 const struct cl_decoded_option *decoded,
169 unsigned int lang_mask, int kind, location_t loc,
170 const struct cl_option_handlers *handlers,
171 diagnostic_context *dc);
173 /* The mask that must have some bit in common with the flags for the
174 option for this particular handler to be used. */
178 /* Structure describing the callbacks used in handling options. */
180 struct cl_option_handlers
182 /* Callback for an unknown option to determine whether to give an
183 error for it, and possibly store information to diagnose the
184 option at a later point. Return true if an error should be
185 given, false otherwise. */
186 bool (*unknown_option_callback) (const struct cl_decoded_option *decoded);
188 /* Callback to handle, and possibly diagnose, an option for another
190 void (*wrong_lang_callback) (const struct cl_decoded_option *decoded,
191 unsigned int lang_mask);
193 /* Callback to call after the successful handling of any option. */
194 void (*post_handling_callback) (const struct cl_decoded_option *decoded,
197 /* The number of individual handlers. */
200 /* The handlers themselves. */
201 struct cl_option_handler_func handlers[3];
204 /* Input file names. */
206 extern const char **in_fnames;
208 /* The count of input filenames. */
210 extern unsigned num_in_fnames;
212 size_t find_opt (const char *input, int lang_mask);
213 extern int integral_argument (const char *arg);
214 extern void decode_cmdline_options_to_array (unsigned int argc,
216 unsigned int lang_mask,
217 struct cl_decoded_option **decoded_options,
218 unsigned int *decoded_options_count);
219 extern void init_options_once (void);
220 extern void init_options_struct (struct gcc_options *opts,
221 struct gcc_options *opts_set);
222 extern void decode_cmdline_options_to_array_default_mask (unsigned int argc,
224 struct cl_decoded_option **decoded_options,
225 unsigned int *decoded_options_count);
226 extern void set_default_handlers (struct cl_option_handlers *handlers);
227 extern void decode_options (struct gcc_options *opts,
228 struct gcc_options *opts_set,
229 struct cl_decoded_option *decoded_options,
230 unsigned int decoded_options_count,
232 diagnostic_context *dc);
233 extern int option_enabled (int opt_idx, void *opts);
234 extern bool get_option_state (struct gcc_options *, int,
235 struct cl_option_state *);
236 extern void set_option (struct gcc_options *opts,
237 struct gcc_options *opts_set,
238 int opt_index, int value, const char *arg, int kind,
239 location_t loc, diagnostic_context *dc);
240 extern void *option_flag_var (int opt_index, struct gcc_options *opts);
241 bool handle_generated_option (struct gcc_options *opts,
242 struct gcc_options *opts_set,
243 size_t opt_index, const char *arg, int value,
244 unsigned int lang_mask, int kind, location_t loc,
245 const struct cl_option_handlers *handlers,
246 diagnostic_context *dc);
247 void generate_option (size_t opt_index, const char *arg, int value,
248 unsigned int lang_mask,
249 struct cl_decoded_option *decoded);
250 void generate_option_input_file (const char *file,
251 struct cl_decoded_option *decoded);
252 extern void read_cmdline_option (struct gcc_options *opts,
253 struct gcc_options *opts_set,
254 struct cl_decoded_option *decoded,
256 unsigned int lang_mask,
257 const struct cl_option_handlers *handlers,
258 diagnostic_context *dc);
259 extern void control_warning_option (unsigned int opt_index, int kind,
260 bool imply, location_t loc,
261 unsigned int lang_mask,
262 const struct cl_option_handlers *handlers,
263 struct gcc_options *opts,
264 struct gcc_options *opts_set,
265 diagnostic_context *dc);
266 extern void print_ignored_options (void);