gcc/optc-gen.awk

   1 #  Copyright (C) 2003,2004 Free Software Foundation, Inc.
   2 #  Contributed by Kelley Cook, June 2004.
   3 #  Original code from Neil Booth, May 2003.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the
   7 # Free Software Foundation; either version 2, or (at your option) any
   8 # later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18
  19 # This Awk script reads in the option records generated from
  20 # opt-gather.awk, combines the flags of duplicat options and generates a
  21 # C file.
  22 #
  23 # This program uses functions from opt-functions.awk
  24 #
  25 # Usage: awk -f opt-functions.awk -f optc-gen.awk \
  26 #            [-v header_name=header.h] < inputfile > options.c
  27
  28 BEGIN {
  29         n_opts = 0
  30         n_langs = 0
  31         quote = "\042"
  32         comma = ","
  33         FS=SUBSEP
  34         # Default the name of header created from opth-gen.awk to options.h
  35         if (header_name == "") header_name="options.h"
  36 }
  37
  38 # Collect the text and flags of each option into an array
  39         {
  40                 if ($1 == "Language") {
  41                         langs[n_langs] = $2
  42                         n_langs++;
  43                 }
  44                 else {
  45                         name = opt_args("Mask", $1)
  46                         if (name == "") {
  47                                 opts[n_opts]  = $1
  48                                 flags[n_opts] = $2
  49                                 help[n_opts]  = $3
  50                                 n_opts++;
  51                         }
  52                 }
  53         }
  54
  55 # Dump that array of options into a C file.
  56 END {
  57 print "/* This file is auto-generated by opts.sh.  */"
  58 print ""
  59 n_headers = split(header_name, headers, " ")
  60 for (i = 1; i <= n_headers; i++)
  61         print "#include " quote headers[i] quote
  62 print "#include " quote "opts.h" quote
  63 print "#include " quote "intl.h" quote
  64 print ""
  65 print "int target_flags;"
  66 print ""
  67
  68 for (i = 0; i < n_opts; i++) {
  69         name = var_name(flags[i]);
  70         if (name == "")
  71                 continue;
  72
  73         if (flag_set_p("VarExists", flags[i])) {
  74                 # Need it for the gcc driver.
  75                 if (name in var_seen)
  76                         continue;
  77                 init = ""
  78         }
  79         else {
  80                 init = opt_args("Init", flags[i])
  81                 if (init != "")
  82                         init = " = " init;
  83                 else if (name in var_seen)
  84                         continue;
  85         }
  86
  87         print "/* Set by -" opts[i] "."
  88         print "   " help[i] "  */"
  89         print var_type(flags[i]) name init ";"
  90         print ""
  91
  92         var_seen[name] = 1;
  93 }
  94
  95 print ""
  96 print "/* Local state variables.  */"
  97 for (i = 0; i < n_opts; i++) {
  98         name = static_var(opts[i], flags[i]);
  99         if (name != "")
 100                 print "static " var_type(flags[i]) name ";"
 101 }
 102 print ""
 103
 104 print "const char * const lang_names[] =\n{"
 105 for (i = 0; i < n_langs; i++) {
 106         macros[i] = "CL_" langs[i]
 107         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 108         s = substr("         ", length (macros[i]))
 109         print "  " quote langs[i] quote ","
 110     }
 111
 112 print "  0\n};\n"
 113 print "const unsigned int cl_options_count = N_OPTS;\n"
 114
 115 print "const struct cl_option cl_options[] =\n{"
 116
 117 j = 0
 118 for (i = 0; i < n_opts; i++) {
 119         back_chain[i] = "N_OPTS";
 120         indices[opts[i]] = j;
 121         # Combine the flags of identical switches.  Switches
 122         # appear many times if they are handled by many front
 123         # ends, for example.
 124         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 125                 flags[i + 1] = flags[i] " " flags[i + 1];
 126                 i++;
 127                 back_chain[i] = "N_OPTS";
 128                 indices[opts[i]] = j;
 129         }
 130         j++;
 131 }
 132
 133 for (i = 0; i < n_opts; i++) {
 134         # Combine the flags of identical switches.  Switches
 135         # appear many times if they are handled by many front
 136         # ends, for example.
 137         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 138                 flags[i + 1] = flags[i] " " flags[i + 1];
 139                 i++;
 140         }
 141
 142         len = length (opts[i]);
 143         enum = "OPT_" opts[i]
 144         if (opts[i] == "finline-limit=")
 145                 enum = enum "eq"
 146         gsub ("[^A-Za-z0-9]", "_", enum)
 147
 148         # If this switch takes joined arguments, back-chain all
 149         # subsequent switches to it for which it is a prefix.  If
 150         # a later switch S is a longer prefix of a switch T, T
 151         # will be back-chained to S in a later iteration of this
 152         # for() loop, which is what we want.
 153         if (flag_set_p("Joined.*", flags[i])) {
 154                 for (j = i + 1; j < n_opts; j++) {
 155                         if (substr (opts[j], 1, len) != opts[i])
 156                                 break;
 157                         back_chain[j] = enum;
 158                 }
 159         }
 160
 161         s = substr("                                  ", length (opts[i]))
 162         if (i + 1 == n_opts)
 163                 comma = ""
 164
 165         if (help[i] == "")
 166                 hlp = "0"
 167         else
 168                 hlp = quote help[i] quote;
 169
 170         neg = opt_args("Negative", flags[i]);
 171         if (neg != "")
 172                 idx = indices[neg]
 173         else {
 174                 if (flag_set_p("RejectNegative", flags[i]))
 175                         idx = -1;
 176                 else {
 177                         if (opts[i] ~ "^[Wfm]")
 178                                 idx = indices[opts[i]];
 179                         else
 180                                 idx = -1;
 181                 }
 182         }
 183         printf("  { %c-%s%c,\n    %s,\n    %s, %u, %d,\n",
 184                quote, opts[i], quote, hlp, back_chain[i], len, idx)
 185         condition = opt_args("Condition", flags[i])
 186         cl_flags = switch_flags(flags[i])
 187         if (condition != "")
 188                 printf("#if %s\n" \
 189                        "    %s,\n" \
 190                        "#else\n" \
 191                        "    CL_DISABLED,\n" \
 192                        "#endif\n",
 193                        condition, cl_flags, cl_flags)
 194         else
 195                 printf("    %s,\n", cl_flags)
 196         printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),
 197                var_set(flags[i]), comma)
 198 }
 199
 200 print "};"
 201 }