gcc/optc-gen.awk

   1 #  Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011
   2 #  Free Software Foundation, Inc.
   3 #  Contributed by Kelley Cook, June 2004.
   4 #  Original code from Neil Booth, May 2003.
   5 #
   6 # This program is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by the
   8 # Free Software Foundation; either version 3, or (at your option) any
   9 # later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; see the file COPYING3.  If not see
  18 # <http://www.gnu.org/licenses/>.
  19
  20 # This Awk script reads in the option records generated from
  21 # opt-gather.awk, combines the flags of duplicate options and generates a
  22 # C file.
  23 #
  24
  25 # This program uses functions from opt-functions.awk and code from
  26 # opt-read.awk.
  27 #
  28 # Usage: awk -f opt-functions.awk -f opt-read.awk -f optc-gen.awk \
  29 #            [-v header_name=header.h] < inputfile > options.c
  30
  31 # Dump that array of options into a C file.
  32 END {
  33 print "/* This file is auto-generated by optc-gen.awk.  */"
  34 print ""
  35 n_headers = split(header_name, headers, " ")
  36 for (i = 1; i <= n_headers; i++)
  37         print "#include " quote headers[i] quote
  38 print "#include " quote "opts.h" quote
  39 print "#include " quote "intl.h" quote
  40 print ""
  41
  42 if (n_extra_c_includes > 0) {
  43         for (i = 0; i < n_extra_c_includes; i++) {
  44                 print "#include " quote extra_c_includes[i] quote
  45         }
  46         print ""
  47 }
  48
  49 for (i = 0; i < n_enums; i++) {
  50         name = enum_names[i]
  51         type = enum_type[name]
  52         print "static const struct cl_enum_arg cl_enum_" name \
  53             "_data[] = "
  54         print "{"
  55         print enum_data[name] "  { NULL, 0, 0 }"
  56         print "};"
  57         print ""
  58         print "static void"
  59         print "cl_enum_" name "_set (void *var, int value)"
  60         print "{"
  61         print "  *((" type " *) var) = (" type ") value;"
  62         print "}"
  63         print ""
  64         print "static int"
  65         print "cl_enum_" name "_get (const void *var)"
  66         print "{"
  67         print "  return (int) *((const " type " *) var);"
  68         print "}"
  69         print ""
  70 }
  71
  72 print "const struct cl_enum cl_enums[] ="
  73 print "{"
  74 for (i = 0; i < n_enums; i++) {
  75         name = enum_names[i]
  76         ehelp = enum_help[name]
  77         if (ehelp == "")
  78                 ehelp = "NULL"
  79         else
  80                 ehelp = quote ehelp quote
  81         unknown_error = enum_unknown_error[name]
  82         if (unknown_error == "")
  83                 unknown_error = "NULL"
  84         else
  85                 unknown_error = quote unknown_error quote
  86         print "  {"
  87         print "    " ehelp ","
  88         print "    " unknown_error ","
  89         print "    cl_enum_" name "_data,"
  90         print "    sizeof (" enum_type[name] "),"
  91         print "    cl_enum_" name "_set,"
  92         print "    cl_enum_" name "_get"
  93         print "  },"
  94 }
  95 print "};"
  96 print "const unsigned int cl_enums_count = " n_enums ";"
  97 print ""
  98
  99 print "const struct gcc_options global_options_init =\n{"
 100 for (i = 0; i < n_extra_vars; i++) {
 101         var = extra_vars[i]
 102         init = extra_vars[i]
 103         if (var ~ "=" ) {
 104                 sub(".*= *", "", init)
 105         } else {
 106                 init = "0"
 107         }
 108         sub(" *=.*", "", var)
 109         name = var
 110         sub("^.*[ *]", "", name)
 111         sub("\\[.*\\]$", "", name)
 112         var_seen[name] = 1
 113         print "  " init ", /* " name " */"
 114 }
 115 for (i = 0; i < n_opts; i++) {
 116         name = var_name(flags[i]);
 117         if (name == "")
 118                 continue;
 119
 120         init = opt_args("Init", flags[i])
 121         if (init != "") {
 122                 if (name in var_init && var_init[name] != init)
 123                         print "#error multiple initializers for " name
 124                 var_init[name] = init
 125         }
 126 }
 127 for (i = 0; i < n_opts; i++) {
 128         name = var_name(flags[i]);
 129         if (name == "")
 130                 continue;
 131
 132         if (name in var_seen)
 133                 continue;
 134
 135         if (name in var_init)
 136                 init = var_init[name]
 137         else
 138                 init = "0"
 139
 140         print "  " init ", /* " name " */"
 141
 142         var_seen[name] = 1;
 143 }
 144 for (i = 0; i < n_opts; i++) {
 145         name = static_var(opts[i], flags[i]);
 146         if (name != "") {
 147                 print "  0, /* " name " (private state) */"
 148                 print "#undef x_" name
 149         }
 150 }
 151 for (i = 0; i < n_opts; i++) {
 152         if (flag_set_p("SetByCombined", flags[i]))
 153                 print "  false, /* frontend_set_" var_name(flags[i]) " */"
 154 }
 155 print "};"
 156 print ""
 157 print "struct gcc_options global_options;"
 158 print "struct gcc_options global_options_set;"
 159 print ""
 160
 161 print "const char * const lang_names[] =\n{"
 162 for (i = 0; i < n_langs; i++) {
 163         macros[i] = "CL_" langs[i]
 164         gsub( "[^" alnum "_]", "X", macros[i] )
 165         s = substr("         ", length (macros[i]))
 166         print "  " quote langs[i] quote ","
 167     }
 168
 169 print "  0\n};\n"
 170 print "const unsigned int cl_options_count = N_OPTS;\n"
 171 print "const unsigned int cl_lang_count = " n_langs ";\n"
 172
 173 print "const struct cl_option cl_options[] =\n{"
 174
 175 j = 0
 176 for (i = 0; i < n_opts; i++) {
 177         back_chain[i] = "N_OPTS";
 178         indices[opts[i]] = j;
 179         # Combine the flags of identical switches.  Switches
 180         # appear many times if they are handled by many front
 181         # ends, for example.
 182         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 183                 flags[i + 1] = flags[i] " " flags[i + 1];
 184                 if (help[i + 1] == "")
 185                         help[i + 1] = help[i]
 186                 else if (help[i] != "" && help[i + 1] != help[i])
 187                         print "warning: multiple different help strings for " \
 188                                 opts[i] ":\n\t" help[i] "\n\t" help[i + 1] \
 189                                 | "cat 1>&2"
 190                 i++;
 191                 back_chain[i] = "N_OPTS";
 192                 indices[opts[i]] = j;
 193         }
 194         j++;
 195 }
 196
 197 for (i = 0; i < n_opts; i++) {
 198         # With identical flags, pick only the last one.  The
 199         # earlier loop ensured that it has all flags merged,
 200         # and a nonempty help text if one of the texts was nonempty.
 201         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 202                 i++;
 203         }
 204
 205         len = length (opts[i]);
 206         enum = opt_enum(opts[i])
 207
 208         # If this switch takes joined arguments, back-chain all
 209         # subsequent switches to it for which it is a prefix.  If
 210         # a later switch S is a longer prefix of a switch T, T
 211         # will be back-chained to S in a later iteration of this
 212         # for() loop, which is what we want.
 213         if (flag_set_p("Joined.*", flags[i])) {
 214                 for (j = i + 1; j < n_opts; j++) {
 215                         if (substr (opts[j], 1, len) != opts[i])
 216                                 break;
 217                         back_chain[j] = enum;
 218                 }
 219         }
 220
 221         s = substr("                                  ", length (opts[i]))
 222         if (i + 1 == n_opts)
 223                 comma = ""
 224
 225         if (help[i] == "")
 226                 hlp = "0"
 227         else
 228                 hlp = quote help[i] quote;
 229
 230         missing_arg_error = opt_args("MissingArgError", flags[i])
 231         if (missing_arg_error == "")
 232                 missing_arg_error = "0"
 233         else
 234                 missing_arg_error = quote missing_arg_error quote
 235
 236
 237         warn_message = opt_args("Warn", flags[i])
 238         if (warn_message == "")
 239                 warn_message = "0"
 240         else
 241                 warn_message = quote warn_message quote
 242
 243         alias_arg = opt_args("Alias", flags[i])
 244         if (alias_arg == "") {
 245                 if (flag_set_p("Ignore", flags[i]))
 246                         alias_data = "NULL, NULL, OPT_SPECIAL_ignore"
 247                 else
 248                         alias_data = "NULL, NULL, N_OPTS"
 249         } else {
 250                 alias_opt = nth_arg(0, alias_arg)
 251                 alias_posarg = nth_arg(1, alias_arg)
 252                 alias_negarg = nth_arg(2, alias_arg)
 253
 254                 if (var_ref(opts[i], flags[i]) != "-1")
 255                         print "#error Alias setting variable"
 256
 257                 if (alias_posarg != "" && alias_negarg == "") {
 258                         if (!flag_set_p("RejectNegative", flags[i]) \
 259                             && opts[i] ~ "^[Wfm]")
 260                                 print "#error Alias with single argument " \
 261                                         "allowing negative form"
 262                 }
 263                 if (alias_posarg != "" \
 264                     && flag_set_p("NegativeAlias", flags[i])) {
 265                         print "#error Alias with multiple arguments " \
 266                                 "used with NegativeAlias"
 267                 }
 268
 269                 alias_opt = opt_enum(alias_opt)
 270                 if (alias_posarg == "")
 271                         alias_posarg = "NULL"
 272                 else
 273                         alias_posarg = quote alias_posarg quote
 274                 if (alias_negarg == "")
 275                         alias_negarg = "NULL"
 276                 else
 277                         alias_negarg = quote alias_negarg quote
 278                 alias_data = alias_posarg ", " alias_negarg ", " alias_opt
 279         }
 280
 281         neg = opt_args("Negative", flags[i]);
 282         if (neg != "")
 283                 idx = indices[neg]
 284         else {
 285                 if (flag_set_p("RejectNegative", flags[i]))
 286                         idx = -1;
 287                 else {
 288                         if (opts[i] ~ "^[Wfm]")
 289                                 idx = indices[opts[i]];
 290                         else
 291                                 idx = -1;
 292                 }
 293         }
 294         # Split the printf after %u to work around an ia64-hp-hpux11.23
 295         # awk bug.
 296         printf("  { %c-%s%c,\n    %s,\n    %s,\n    %s,\n    %s, %s, %u,",
 297                quote, opts[i], quote, hlp, missing_arg_error, warn_message,
 298                alias_data, back_chain[i], len)
 299         printf(" %d,\n", idx)
 300         condition = opt_args("Condition", flags[i])
 301         cl_flags = switch_flags(flags[i])
 302         cl_bit_fields = switch_bit_fields(flags[i])
 303         cl_zero_bit_fields = switch_bit_fields("")
 304         if (condition != "")
 305                 printf("#if %s\n" \
 306                        "    %s,\n" \
 307                        "    0, %s,\n" \
 308                        "#else\n" \
 309                        "    0,\n" \
 310                        "    1 /* Disabled.  */, %s,\n" \
 311                        "#endif\n",
 312                        condition, cl_flags, cl_bit_fields, cl_zero_bit_fields)
 313         else
 314                 printf("    %s,\n" \
 315                        "    0, %s,\n",
 316                        cl_flags, cl_bit_fields)
 317         printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),
 318                var_set(flags[i]), comma)
 319 }
 320
 321 print "};"
 322
 323 }