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 28BEGIN { 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. 56END { 57print "/* This file is auto-generated by opts.sh. */" 58print "" 59n_headers = split(header_name, headers, " ") 60for (i = 1; i <= n_headers; i++) 61 print "#include " quote headers[i] quote 62print "#include " quote "opts.h" quote 63print "#include " quote "intl.h" quote 64print "" 65print "#ifdef GCC_DRIVER" 66print "int target_flags;" 67print "#endif /* GCC_DRIVER */" 68print "" 69 70for (i = 0; i < n_opts; i++) { 71 name = var_name(flags[i]); 72 if (name == "") 73 continue; 74 75 if (flag_set_p("VarExists", flags[i])) { 76 # Need it for the gcc driver. 77 if (name in var_seen) 78 continue; 79 init = "" 80 gcc_driver = 1 81 } 82 else { 83 init = opt_args("Init", flags[i]) 84 if (init != "") 85 init = " = " init; 86 else if (name in var_seen) 87 continue; 88 gcc_driver = 0 89 } 90 91 if (gcc_driver == 1) 92 print "#ifdef GCC_DRIVER" 93 print "/* Set by -" opts[i] "." 94 print " " help[i] " */" 95 print var_type(flags[i]) name init ";" 96 if (gcc_driver == 1) 97 print "#endif /* GCC_DRIVER */" 98 print "" 99 100 var_seen[name] = 1; 101} 102 103print "" 104print "/* Local state variables. */" 105for (i = 0; i < n_opts; i++) { 106 name = static_var(opts[i], flags[i]); 107 if (name != "") 108 print "static " var_type(flags[i]) name ";" 109} 110print "" 111 112print "const char * const lang_names[] =\n{" 113for (i = 0; i < n_langs; i++) { 114 macros[i] = "CL_" langs[i] 115 gsub( "[^A-Za-z0-9_]", "X", macros[i] ) 116 s = substr(" ", length (macros[i])) 117 print " " quote langs[i] quote "," 118 } 119 120print " 0\n};\n" 121print "const unsigned int cl_options_count = N_OPTS;\n" 122 123print "const struct cl_option cl_options[] =\n{" 124 125j = 0 126for (i = 0; i < n_opts; i++) { 127 back_chain[i] = "N_OPTS"; 128 indices[opts[i]] = j; 129 # Combine the flags of identical switches. Switches 130 # appear many times if they are handled by many front 131 # ends, for example. 132 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 133 flags[i + 1] = flags[i] " " flags[i + 1]; 134 i++; 135 back_chain[i] = "N_OPTS"; 136 indices[opts[i]] = j; 137 } 138 j++; 139} 140 141for (i = 0; i < n_opts; i++) { 142 # Combine the flags of identical switches. Switches 143 # appear many times if they are handled by many front 144 # ends, for example. 145 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 146 flags[i + 1] = flags[i] " " flags[i + 1]; 147 i++; 148 } 149 150 len = length (opts[i]); 151 enum = "OPT_" opts[i] 152 if (opts[i] == "finline-limit=") 153 enum = enum "eq" 154 gsub ("[^A-Za-z0-9]", "_", enum) 155 156 # If this switch takes joined arguments, back-chain all 157 # subsequent switches to it for which it is a prefix. If 158 # a later switch S is a longer prefix of a switch T, T 159 # will be back-chained to S in a later iteration of this 160 # for() loop, which is what we want. 161 if (flag_set_p("Joined.*", flags[i])) { 162 for (j = i + 1; j < n_opts; j++) { 163 if (substr (opts[j], 1, len) != opts[i]) 164 break; 165 back_chain[j] = enum; 166 } 167 } 168 169 s = substr(" ", length (opts[i])) 170 if (i + 1 == n_opts) 171 comma = "" 172 173 if (help[i] == "") 174 hlp = "0" 175 else 176 hlp = quote help[i] quote; 177 178 neg = opt_args("Negative", flags[i]); 179 if (neg != "") 180 idx = indices[neg] 181 else { 182 if (flag_set_p("RejectNegative", flags[i])) 183 idx = -1; 184 else { 185 if (opts[i] ~ "^[Wfm]") 186 idx = indices[opts[i]]; 187 else 188 idx = -1; 189 } 190 } 191 printf(" { %c-%s%c,\n %s,\n %s, %u, %d,\n", 192 quote, opts[i], quote, hlp, back_chain[i], len, idx) 193 condition = opt_args("Condition", flags[i]) 194 cl_flags = switch_flags(flags[i]) 195 if (condition != "") 196 printf("#if %s\n" \ 197 " %s,\n" \ 198 "#else\n" \ 199 " CL_DISABLED,\n" \ 200 "#endif\n", 201 condition, cl_flags, cl_flags) 202 else 203 printf(" %s,\n", cl_flags) 204 printf(" %s, %s }%s\n", var_ref(opts[i], flags[i]), 205 var_set(flags[i]), comma) 206} 207 208print "};" 209} 210