gcc/opts.sh

   1 #!/bin/sh
   2 #
   3 #  Copyright (C) 2003 Free Software Foundation, Inc.
   4 #  Contributed by 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 2, 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; if not, write to the Free Software
  18 # Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 #
  20 # Usage: opts.sh moveifchange srcdir outfile.c outfile.h file1.opt [ ...]
  21
  22 # Always operate in the C locale.
  23 LANG=C
  24 LANGUAGE=C
  25 LC_ALL=C
  26 export LANG LANGUAGE LC_ALL
  27
  28 # Set AWK if environment has not already set it.
  29 AWK=${AWK-awk}
  30
  31 SORT=sort               # Could be /bin/sort or /usr/bin/sort
  32
  33 MOVEIFCHANGE=$1; shift
  34 C_FILE=$1; shift
  35 H_FILE=$1; shift
  36 TMP_C_FILE=tmp-${C_FILE}
  37 TMP_H_FILE=tmp-${H_FILE}
  38
  39 ${AWK} '
  40         # Ignore comments and blank lines
  41         /^[ \t]*(;|$)/  { next }
  42         # Note that RS="" falls foul of gawk 3.1.2 bugs
  43         /^[^ \t]/       { record = $0
  44                           do { getline tmp;
  45                                if (!(tmp ~ "^[ \t]*(;|$)"))
  46                                   record = record "\034" tmp
  47                           } while (tmp != "")
  48                           print record
  49                         }
  50 ' "$@" | ${SORT} | ${AWK} '
  51     function switch_flags (flags,   result)
  52     {
  53         flags = " " flags " "
  54         result = "0"
  55         for (j = 0; j < n_langs; j++) {
  56             regex = " " langs[j] " "
  57             gsub ( "\\+", "\\+", regex )
  58             if (flags ~ regex)
  59                 result = result " | " macros[j]
  60         }
  61         if (flags ~ " Common ") result = result " | CL_COMMON"
  62         if (flags ~ " Joined ") result = result " | CL_JOINED"
  63         if (flags ~ " JoinedOrMissing ") \
  64                 result = result " | CL_JOINED | CL_MISSING_OK"
  65         if (flags ~ " Separate ") result = result " | CL_SEPARATE"
  66         if (flags ~ " RejectNegative ") result = result " | CL_REJECT_NEGATIVE"
  67         if (flags ~ " UInteger ") result = result " | CL_UINTEGER"
  68         if (flags ~ " Undocumented ") result = result " | CL_UNDOCUMENTED"
  69         sub( "^0 \\| ", "", result )
  70         return result
  71     }
  72
  73     BEGIN {
  74         FS = "\034"
  75         n_opts = 0
  76         n_langs = 0
  77     }
  78
  79 # Collect the text and flags of each option into an array
  80     {
  81         if ($1 == "Language") {
  82                 langs[n_langs] = $2
  83                 n_langs++;
  84         } else {
  85                 opts[n_opts] = $1
  86                 flags[n_opts] = $2
  87                 help[n_opts] = $3
  88                 n_opts++;
  89         }
  90     }
  91
  92 # Dump out an enumeration into a .h file, and an array of options into a
  93 # C file.  Combine the flags of duplicate options.
  94     END {
  95         c_file = "'${TMP_C_FILE}'"
  96         h_file = "'${TMP_H_FILE}'"
  97         realh_file = "'${H_FILE}'"
  98         comma = ","
  99
 100         print "/* This file is auto-generated by opts.sh.  */\n" > c_file
 101         print "#include <intl.h>"                       >> c_file
 102         print "#include \"" realh_file "\""             >> c_file
 103         print "#include \"opts.h\"\n"                   >> c_file
 104         print "const char * const lang_names[] =\n{"    >> c_file
 105
 106         print "/* This file is auto-generated by opts.sh.  */\n" > h_file
 107         for (i = 0; i < n_langs; i++) {
 108             macros[i] = "CL_" langs[i]
 109             gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 110             s = substr("         ", length (macros[i]))
 111             print "#define " macros[i] s " (1 << " i ")" >> h_file
 112             print "  \"" langs[i] "\","                 >> c_file
 113         }
 114
 115         print "  0\n};\n"                               >> c_file
 116         print "const unsigned int cl_options_count = N_OPTS;\n" >> c_file
 117         print "const struct cl_option cl_options[] =\n{" >> c_file
 118
 119         print "\nenum opt_code\n{"                      >> h_file
 120
 121         for (i = 0; i < n_opts; i++)
 122             back_chain[i] = "N_OPTS";
 123
 124         for (i = 0; i < n_opts; i++) {
 125             # Combine the flags of identical switches.  Switches
 126             # appear many times if they are handled by many front
 127             # ends, for example.
 128             while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 129                 flags[i + 1] = flags[i] " " flags[i + 1];
 130                 i++;
 131             }
 132
 133             len = length (opts[i]);
 134             enum = "OPT_" opts[i]
 135             if (opts[i] == "finline-limit=")
 136                 enum = enum "eq"
 137             gsub ("[^A-Za-z0-9]", "_", enum)
 138
 139             # If this switch takes joined arguments, back-chain all
 140             # subsequent switches to it for which it is a prefix.  If
 141             # a later switch S is a longer prefix of a switch T, T
 142             # will be back-chained to S in a later iteration of this
 143             # for() loop, which is what we want.
 144             if (flags[i] ~ "Joined") {
 145                 for (j = i + 1; j < n_opts; j++) {
 146                     if (substr (opts[j], 1, len) != opts[i])
 147                         break;
 148                     back_chain[j] = enum;
 149                 }
 150             }
 151
 152             s = substr("                                  ", length (opts[i]))
 153             if (i + 1 == n_opts)
 154                 comma = ""
 155
 156             if (help[i] == "")
 157                 hlp = "0"
 158             else
 159                 hlp = "N_(\"" help[i] "\")";
 160
 161             printf("  %s,%s/* -%s */\n", enum, s, opts[i]) >> h_file
 162             printf("  { \"-%s\",\n    %s,\n    %s, %u, %s }%s\n",
 163                    opts[i], hlp, back_chain[i], len,
 164                    switch_flags(flags[i]), comma)       >> c_file
 165         }
 166
 167         print "  N_OPTS\n};"                            >> h_file
 168         print "};"                                      >> c_file
 169     }
 170 '
 171
 172 # Copy the newly generated files back to the correct names only if different.
 173 # This is to prevent a cascade of file rebuilds when not necessary.
 174 ${MOVEIFCHANGE} ${TMP_H_FILE} ${H_FILE}
 175 ${MOVEIFCHANGE} ${TMP_C_FILE} ${C_FILE}