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1 /* Command line option handling.
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2 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
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3 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef GCC_OPTS_H
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22 #define GCC_OPTS_H
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23
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24 /* Specifies how a switch's VAR_VALUE relates to its FLAG_VAR. */
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25 enum cl_var_type {
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26 /* The switch is enabled when FLAG_VAR is nonzero. */
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27 CLVC_BOOLEAN,
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28
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29 /* The switch is enabled when FLAG_VAR == VAR_VALUE. */
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30 CLVC_EQUAL,
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31
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32 /* The switch is enabled when VAR_VALUE is not set in FLAG_VAR. */
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33 CLVC_BIT_CLEAR,
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34
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35 /* The switch is enabled when VAR_VALUE is set in FLAG_VAR. */
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36 CLVC_BIT_SET,
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37
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38 /* The switch takes a string argument and FLAG_VAR points to that
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39 argument. */
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40 CLVC_STRING
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41 };
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42
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43 struct cl_option
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44 {
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45 const char *opt_text;
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46 const char *help;
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47 unsigned short back_chain;
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48 unsigned char opt_len;
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49 int neg_index;
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50 unsigned int flags;
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51 void *flag_var;
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52 enum cl_var_type var_type;
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53 int var_value;
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54 };
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55
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56 /* Records that the state of an option consists of SIZE bytes starting
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57 at DATA. DATA might point to CH in some cases. */
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58 struct cl_option_state {
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59 const void *data;
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60 size_t size;
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61 char ch;
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62 };
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63
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64 extern const struct cl_option cl_options[];
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65 extern const unsigned int cl_options_count;
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66 extern const char *const lang_names[];
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67 extern const unsigned int cl_lang_count;
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68
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69 #define CL_PARAMS (1 << 17) /* Fake entry. Used to display --param info with --help. */
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70 #define CL_WARNING (1 << 18) /* Enables an (optional) warning message. */
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71 #define CL_OPTIMIZATION (1 << 19) /* Enables an (optional) optimization. */
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72 #define CL_TARGET (1 << 20) /* Target-specific option. */
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73 #define CL_COMMON (1 << 21) /* Language-independent. */
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74
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75 #define CL_MIN_OPTION_CLASS CL_PARAMS
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76 #define CL_MAX_OPTION_CLASS CL_COMMON
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77
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78 /* From here on the bits describe attributes of the options.
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79 Before this point the bits have described the class of the option.
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80 This distinction is important because --help will not list options
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81 which only have these higher bits set. */
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82
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83 #define CL_SAVE (1 << 22) /* Target-specific option for attribute. */
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84 #define CL_DISABLED (1 << 23) /* Disabled in this configuration. */
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85 #define CL_REPORT (1 << 24) /* Report argument with -fverbose-asm */
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86 #define CL_JOINED (1 << 25) /* If takes joined argument. */
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87 #define CL_SEPARATE (1 << 26) /* If takes a separate argument. */
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88 #define CL_REJECT_NEGATIVE (1 << 27) /* Reject no- form. */
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89 #define CL_MISSING_OK (1 << 28) /* Missing argument OK (joined). */
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90 #define CL_UINTEGER (1 << 29) /* Argument is an integer >=0. */
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91 #define CL_UNDOCUMENTED (1 << 30) /* Do not output with --help. */
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92
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93 /* Input file names. */
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94
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95 extern const char **in_fnames;
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96
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97 /* The count of input filenames. */
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98
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99 extern unsigned num_in_fnames;
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100
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101 size_t find_opt (const char *input, int lang_mask);
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102 extern void prune_options (int *argcp, char ***argvp);
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103 extern void decode_options (unsigned int argc, const char **argv);
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104 extern int option_enabled (int opt_idx);
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105 extern bool get_option_state (int, struct cl_option_state *);
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106
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107 extern void enable_warning_as_error (const char *arg, int value,
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108 unsigned int lang_mask);
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109 extern void print_ignored_options (void);
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110 #endif
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