gcc/opts.h

   1 /* Command line option handling.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   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
  10 version.
  11
  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
  15 for more details.
  16
  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/>.  */
  20
  21 #ifndef GCC_OPTS_H
  22 #define GCC_OPTS_H
  23
  24 /* Specifies how a switch's VAR_VALUE relates to its FLAG_VAR.  */
  25 enum cl_var_type {
  26   /* The switch is enabled when FLAG_VAR is nonzero.  */
  27   CLVC_BOOLEAN,
  28
  29   /* The switch is enabled when FLAG_VAR == VAR_VALUE.  */
  30   CLVC_EQUAL,
  31
  32   /* The switch is enabled when VAR_VALUE is not set in FLAG_VAR.  */
  33   CLVC_BIT_CLEAR,
  34
  35   /* The switch is enabled when VAR_VALUE is set in FLAG_VAR.  */
  36   CLVC_BIT_SET,
  37
  38   /* The switch takes a string argument and FLAG_VAR points to that
  39      argument.  */
  40   CLVC_STRING
  41 };
  42
  43 struct cl_option
  44 {
  45   const char *opt_text;
  46   const char *help;
  47   unsigned short back_chain;
  48   unsigned char opt_len;
  49   int neg_index;
  50   unsigned int flags;
  51   void *flag_var;
  52   enum cl_var_type var_type;
  53   int var_value;
  54 };
  55
  56 /* Records that the state of an option consists of SIZE bytes starting
  57    at DATA.  DATA might point to CH in some cases.  */
  58 struct cl_option_state {
  59   const void *data;
  60   size_t size;
  61   char ch;
  62 };
  63
  64 extern const struct cl_option cl_options[];
  65 extern const unsigned int cl_options_count;
  66 extern const char *const lang_names[];
  67 extern const unsigned int cl_lang_count;
  68
  69 #define CL_PARAMS               (1 << 17) /* Fake entry.  Used to display --param info with --help.  */
  70 #define CL_WARNING              (1 << 18) /* Enables an (optional) warning message.  */
  71 #define CL_OPTIMIZATION         (1 << 19) /* Enables an (optional) optimization.  */
  72 #define CL_TARGET               (1 << 20) /* Target-specific option.  */
  73 #define CL_COMMON               (1 << 21) /* Language-independent.  */
  74
  75 #define CL_MIN_OPTION_CLASS     CL_PARAMS
  76 #define CL_MAX_OPTION_CLASS     CL_COMMON
  77
  78 /* From here on the bits describe attributes of the options.
  79    Before this point the bits have described the class of the option.
  80    This distinction is important because --help will not list options
  81    which only have these higher bits set.  */
  82
  83 #define CL_SAVE                 (1 << 22) /* Target-specific option for attribute.  */
  84 #define CL_DISABLED             (1 << 23) /* Disabled in this configuration.  */
  85 #define CL_REPORT               (1 << 24) /* Report argument with -fverbose-asm  */
  86 #define CL_JOINED               (1 << 25) /* If takes joined argument.  */
  87 #define CL_SEPARATE             (1 << 26) /* If takes a separate argument.  */
  88 #define CL_REJECT_NEGATIVE      (1 << 27) /* Reject no- form.  */
  89 #define CL_MISSING_OK           (1 << 28) /* Missing argument OK (joined).  */
  90 #define CL_UINTEGER             (1 << 29) /* Argument is an integer >=0.  */
  91 #define CL_UNDOCUMENTED         (1 << 30) /* Do not output with --help.  */
  92
  93 /* Input file names.  */
  94
  95 extern const char **in_fnames;
  96
  97 /* The count of input filenames.  */
  98
  99 extern unsigned num_in_fnames;
 100
 101 size_t find_opt (const char *input, int lang_mask);
 102 extern void prune_options (int *argcp, char ***argvp);
 103 extern void decode_options (unsigned int argc, const char **argv);
 104 extern int option_enabled (int opt_idx);
 105 extern bool get_option_state (int, struct cl_option_state *);
 106 extern void set_option (const struct cl_option *, int, const char *);
 107
 108 extern void register_warning_as_error_callback (void (*callback) (int));
 109 extern void enable_warning_as_error (const char *arg, int value,
 110                                      unsigned int lang_mask);
 111 extern void print_ignored_options (void);
 112 #endif