gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
   4
   5 #This file is part of GNU CC.
   6
   7 #GNU CC is free software; you can redistribute it and/or modify
   8 #it under the terms of the GNU General Public License as published by
   9 #the Free Software Foundation; either version 2, or (at your option)
  10 #any later version.
  11
  12 #GNU CC is distributed in the hope that it will be useful,
  13 #but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #GNU General Public License for more details.
  16
  17 #You should have received a copy of the GNU General Public License
  18 #along with GNU CC; see the file COPYING.  If not, write to
  19 #the Free Software Foundation, 59 Temple Place - Suite 330,
  20 #Boston, MA 02111-1307, USA.
  21
  22 # This shell script produces a header file which the gcc driver
  23 # program uses to pick which library to use based on the machine
  24 # specific options that it is given.
  25
  26 # The first argument is a list of sets of options.  The elements in
  27 # the list are separated by spaces.  Within an element, the options
  28 # are separated by slashes or pipes.  No leading dash is used on the
  29 # options.
  30 # Each option in a set separated by slashes is mutually incompatible
  31 # with all other options
  32 # in the set.
  33 # Each option in a set separated by pipes will be used for the library
  34 # compilation and any of the options in the set will be sufficient
  35 # for it to be triggered.
  36
  37 # The optional second argument is a list of subdirectory names.  If
  38 # the second argument is non-empty, there must be as many elements in
  39 # the second argument as there are options in the first argument.  The
  40 # elements in the second list are separated by spaces.  If the second
  41 # argument is empty, the option names will be used as the directory
  42 # names.
  43
  44 # The optional third argument is a list of options which are
  45 # identical.  The elements in the list are separated by spaces.  Each
  46 # element must be of the form OPTION=OPTION.  The first OPTION should
  47 # appear in the first argument, and the second should be a synonym for
  48 # it.  Question marks are replaced with equal signs in both options.
  49
  50 # The optional fourth argument is a list of multilib directory
  51 # combinations that should not be built.
  52
  53 # The optional fifth argument is a list of options that should be
  54 # used whenever building multilib libraries.
  55
  56 # The output looks like
  57 #   #define MULTILIB_MATCHES "\
  58 #   SUBDIRECTORY OPTIONS;\
  59 #   ...
  60 #   "
  61 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  62 # multiple options separated by spaces.  Each option may start with an
  63 # exclamation point.  gcc will consider each line in turn.  If none of
  64 # the options beginning with an exclamation point are present, and all
  65 # of the other options are present, that subdirectory will be used.
  66 # The order of the subdirectories is such that they can be created in
  67 # order; that is, a subdirectory is preceded by all its parents.
  68
  69 # Here is a example (this is simplified from the actual 680x0 case):
  70 #   genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
  71 #               "m68000=mc68000"
  72 # This produces:
  73 #   ". !m68000 !mc68000 !m68020 !msoft-float;",
  74 #   "m68000 m68000 !m68020 !msoft-float;",
  75 #   "m68000 mc60000 !m68020 !msoft-float;",
  76 #   "m68020 !m68000 !mc68000 m68020 !msoft-float;",
  77 #   "msoft-float !m68000 !mc68000 !m68020 msoft-float;",
  78 #   "m68000/msoft-float m68000 !m68020 msoft-float;",
  79 #   "m68000/msoft-float mc68000 !m68020 msoft-float;",
  80 #   "m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;",
  81 #
  82 # The effect is that `gcc -msoft-float' (for example) will append
  83 # msoft-float to the directory name when searching for libraries or
  84 # startup files, and `gcc -m68000 -msoft-float' (for example) will
  85 # append m68000/msoft-float.
  86
  87 # Copy the positional parameters into variables.
  88 options=$1
  89 dirnames=$2
  90 matches=$3
  91 exceptions=$4
  92 extra=$5
  93
  94 echo "static char *multilib_raw[] = {"
  95
  96 # What we want to do is select all combinations of the sets in
  97 # options.  Each combination which includes a set of mutually
  98 # exclusive options must then be output multiple times, once for each
  99 # item in the set.  Selecting combinations is a recursive process.
 100 # Since not all versions of sh support functions, we achieve recursion
 101 # by creating a temporary shell script which invokes itself.
 102 rm -f tmpmultilib
 103 cat >tmpmultilib <<\EOF
 104 #!/bin/sh
 105 # This recursive script basically outputs all combinations of its
 106 # input arguments, handling mutually exclusive sets of options by
 107 # repetition.  When the script is called, ${initial} is the list of
 108 # options which should appear before all combinations this will
 109 # output.  The output looks like a list of subdirectory names with
 110 # leading and trailing slashes.
 111 if [ "$#" != "0" ]; then
 112   first=$1
 113   shift
 114   case "$first" in
 115   *\|*)
 116     all=${initial}`echo $first | sed -e 's_|_/_'g`
 117     first=`echo $first | sed -e 's_|_ _'g`
 118     echo ${all}/
 119     initial="${initial}${all}/" ./tmpmultilib $@
 120     ./tmpmultilib $first $@ | grep -v "^${all}"
 121     ;;
 122   *)
 123     for opt in `echo $first | sed -e 's|/| |'g`; do
 124       echo ${initial}${opt}/
 125     done
 126     ./tmpmultilib $@
 127     for opt in `echo $first | sed -e 's|/| |'g`; do
 128       initial="${initial}${opt}/" ./tmpmultilib $@
 129     done
 130   esac
 131 fi
 132 EOF
 133 chmod +x tmpmultilib
 134
 135 combinations=`initial=/ ./tmpmultilib ${options}`
 136
 137 rm -f tmpmultilib
 138
 139 # If there exceptions, weed them out now
 140 if [ -n "${exceptions}" ]; then
 141   rm -f tmpmultilib2
 142   cat >tmpmultilib2 <<\EOF
 143 #!/bin/sh
 144 # This recursive script weeds out any combination of multilib
 145 # switches that should not be generated.  The output looks like
 146 # a list of subdirectory names with leading and trailing slashes.
 147
 148   for opt in $@; do
 149     case "$opt" in
 150 EOF
 151
 152   for except in ${exceptions}; do
 153     echo "      /${except}/) : ;;" >> tmpmultilib2
 154   done
 155
 156 cat >>tmpmultilib2 <<\EOF
 157       *) echo ${opt};;
 158     esac
 159   done
 160 EOF
 161   chmod +x tmpmultilib2
 162   combinations=`./tmpmultilib2 ${combinations}`
 163   rm -f ./tmpmultilib2
 164 fi
 165
 166 # Construct a sed pattern which will convert option names to directory
 167 # names.
 168 todirnames=
 169 if [ -n "${dirnames}" ]; then
 170   set x ${dirnames}
 171   shift
 172   for set in ${options}; do
 173     for opts in `echo ${set} | sed -e 's|/| |'g`; do
 174       patt="/"
 175       for opt in `echo ${opts} | sed -e 's_|_ _'g`; do
 176         if [ "$1" != "${opt}" ]; then
 177           todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 178           patt="${patt}${1}/"
 179           if [ "${patt}" != "/${1}/" ]; then
 180             todirnames="${todirnames} -e s|${patt}|/${1}/|g"
 181           fi
 182         fi
 183       done
 184       shift
 185     done
 186   done
 187 fi
 188
 189 # We need another recursive shell script to correctly handle positive
 190 # matches.  If we are invoked as
 191 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 192 # we must output
 193 #   opt1/opt2 opt1 opt2
 194 #   opt1/opt2 nopt1 opt2
 195 #   opt1/opt2 opt1 nopt2
 196 #   opt1/opt2 nopt1 nopt2
 197 # In other words, we must output all combinations of matches.
 198 rm -f tmpmultilib2
 199 cat >tmpmultilib2 <<\EOF
 200 #!/bin/sh
 201 # The positional parameters are a list of matches to consider.
 202 # ${dirout} is the directory name and ${optout} is the current list of
 203 # options.
 204 if [ "$#" = "0" ]; then
 205   echo "\"${dirout} ${optout};\","
 206 else
 207   first=$1
 208   shift
 209   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 210   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 211   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 212   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 213     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 214     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 215   fi
 216 fi
 217 EOF
 218 chmod +x tmpmultilib2
 219
 220 # Start with the current directory, which includes only negations.
 221 optout=
 222 for set in ${options}; do
 223   for opt in `echo ${set} | sed -e 's_[/|]_ _g'`; do
 224     optout="${optout} !${opt}"
 225   done
 226 done
 227 optout=`echo ${optout} | sed -e 's/^ //'`
 228 echo "\". ${optout};\","
 229
 230 # Work over the list of combinations.  We have to translate each one
 231 # to use the directory names rather than the option names, we have to
 232 # include the information in matches, and we have to generate the
 233 # correct list of options and negations.
 234 for combo in ${combinations}; do
 235   # Use the directory names rather than the option names.
 236   if [ -n "${todirnames}" ]; then
 237     dirout=`echo ${combo} | sed ${todirnames}`
 238   else
 239     dirout=${combo}
 240   fi
 241   # Remove the leading and trailing slashes.
 242   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 243
 244   # Look through the options.  We must output each option that is
 245   # present, and negate each option that is not present.
 246   optout=
 247   for set in ${options}; do
 248     setopts=`echo ${set} | sed -e 's_[/|]_ _g'`
 249     for opt in ${setopts}; do
 250       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 251         optout="${optout} ${opt}"
 252       else
 253         optout="${optout} !${opt}"
 254       fi
 255     done
 256   done
 257   optout=`echo ${optout} | sed -e 's/^ //'`
 258
 259   # Output the line with all appropriate matches.
 260   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 261 done
 262
 263 # Terminate the list of string.
 264 echo "NULL"
 265 echo "};"
 266
 267 # Output all of the matches now as option and that is the same as that, with
 268 # a semicolon trailer.  Include all of the normal options as well.
 269 # Note, the format of the matches is reversed compared
 270 # to what we want, so switch them around.
 271 echo ""
 272 echo "static char *multilib_matches_raw[] = {"
 273 for match in ${matches}; do
 274   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 275   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 276   echo "\"${r} ${l};\","
 277 done
 278 for set in ${options}; do
 279   for opt in `echo ${set} | sed -e 's_[/|]_ _'g`; do
 280     echo "\"${opt} ${opt};\","
 281   done
 282 done
 283 echo "NULL"
 284 echo "};"
 285
 286 # Output the default options now
 287 echo ""
 288 echo "static char *multilib_extra = \"${extra}\";"
 289 rm -f tmpmultilib2
 290
 291 exit 0