gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995, 1996, 1997 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.  No leading dash is used on the options.
  29 # Each option in a set is mutually incompatible with all other options
  30 # in the set.
  31
  32 # The optional second argument is a list of subdirectory names.  If
  33 # the second argument is non-empty, there must be as many elements in
  34 # the second argument as there are options in the first argument.  The
  35 # elements in the second list are separated by spaces.  If the second
  36 # argument is empty, the option names will be used as the directory
  37 # names.
  38
  39 # The optional third argument is a list of options which are
  40 # identical.  The elements in the list are separated by spaces.  Each
  41 # element must be of the form OPTION=OPTION.  The first OPTION should
  42 # appear in the first argument, and the second should be a synonym for
  43 # it.  Question marks are replaced with equal signs in both options.
  44
  45 # The optional fourth argument is a list of multilib directory
  46 # combinations that should not be built.
  47
  48 # The optional fifth argument is a list of options that should be
  49 # used whenever building multilib libraries.
  50
  51 # The output looks like
  52 #   #define MULTILIB_MATCHES "\
  53 #   SUBDIRECTORY OPTIONS;\
  54 #   ...
  55 #   "
  56 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  57 # multiple options separated by spaces.  Each option may start with an
  58 # exclamation point.  gcc will consider each line in turn.  If none of
  59 # the options beginning with an exclamation point are present, and all
  60 # of the other options are present, that subdirectory will be used.
  61 # The order of the subdirectories is such that they can be created in
  62 # order; that is, a subdirectory is preceded by all its parents.
  63
  64 # Here is a example (this is simplified from the actual 680x0 case):
  65 #   genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
  66 #               "m68000=mc68000"
  67 # This produces:
  68 #   ". !m68000 !mc68000 !m68020 !msoft-float;",
  69 #   "m68000 m68000 !m68020 !msoft-float;",
  70 #   "m68000 mc60000 !m68020 !msoft-float;",
  71 #   "m68020 !m68000 !mc68000 m68020 !msoft-float;",
  72 #   "msoft-float !m68000 !mc68000 !m68020 msoft-float;",
  73 #   "m68000/msoft-float m68000 !m68020 msoft-float;",
  74 #   "m68000/msoft-float mc68000 !m68020 msoft-float;",
  75 #   "m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;",
  76 #
  77 # The effect is that `gcc -msoft-float' (for example) will append
  78 # msoft-float to the directory name when searching for libraries or
  79 # startup files, and `gcc -m68000 -msoft-float' (for example) will
  80 # append m68000/msoft-float.
  81
  82 # Copy the positional parameters into variables.
  83 options=$1
  84 dirnames=$2
  85 matches=$3
  86 exceptions=$4
  87 extra=$5
  88
  89 echo "static char *multilib_raw[] = {"
  90
  91 # What we want to do is select all combinations of the sets in
  92 # options.  Each combination which includes a set of mutually
  93 # exclusive options must then be output multiple times, once for each
  94 # item in the set.  Selecting combinations is a recursive process.
  95 # Since not all versions of sh support functions, we achieve recursion
  96 # by creating a temporary shell script which invokes itself.
  97 rm -f tmpmultilib
  98 cat >tmpmultilib <<\EOF
  99 #!/bin/sh
 100 # This recursive script basically outputs all combinations of its
 101 # input arguments, handling mutually exclusive sets of options by
 102 # repetition.  When the script is called, ${initial} is the list of
 103 # options which should appear before all combinations this will
 104 # output.  The output looks like a list of subdirectory names with
 105 # leading and trailing slashes.
 106 if [ "$#" != "0" ]; then
 107   first=$1
 108   shift
 109   for opt in `echo $first | sed -e 's|/| |'g`; do
 110     echo ${initial}${opt}/
 111   done
 112   ./tmpmultilib $@
 113   for opt in `echo $first | sed -e 's|/| |'g`; do
 114     initial="${initial}${opt}/" ./tmpmultilib $@
 115   done
 116 fi
 117 EOF
 118 chmod +x tmpmultilib
 119
 120 combinations=`initial=/ ./tmpmultilib ${options}`
 121
 122 rm -f tmpmultilib
 123
 124 # If there exceptions, weed them out now
 125 if [ -n "${exceptions}" ]; then
 126   rm -f tmpmultilib2
 127   cat >tmpmultilib2 <<\EOF
 128 #!/bin/sh
 129 # This recursive script weeds out any combination of multilib
 130 # switches that should not be generated.  The output looks like
 131 # a list of subdirectory names with leading and trailing slashes.
 132
 133   for opt in $@; do
 134     case "$opt" in
 135 EOF
 136
 137   for except in ${exceptions}; do
 138     echo "      /${except}/) : ;;" >> tmpmultilib2
 139   done
 140
 141 cat >>tmpmultilib2 <<\EOF
 142       *) echo ${opt};;
 143     esac
 144   done
 145 EOF
 146   chmod +x tmpmultilib2
 147   combinations=`./tmpmultilib2 ${combinations}`
 148   rm -f ./tmpmultilib2
 149 fi
 150
 151 # Construct a sed pattern which will convert option names to directory
 152 # names.
 153 todirnames=
 154 if [ -n "${dirnames}" ]; then
 155   set x ${dirnames}
 156   shift
 157   for set in ${options}; do
 158     for opt in `echo ${set} | sed -e 's|/| |'g`; do
 159       if [ "$1" != "${opt}" ]; then
 160         todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 161       fi
 162       shift
 163     done
 164   done
 165 fi
 166
 167 # We need another recursive shell script to correctly handle positive
 168 # matches.  If we are invoked as
 169 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 170 # we must output
 171 #   opt1/opt2 opt1 opt2
 172 #   opt1/opt2 nopt1 opt2
 173 #   opt1/opt2 opt1 nopt2
 174 #   opt1/opt2 nopt1 nopt2
 175 # In other words, we must output all combinations of matches.
 176 rm -f tmpmultilib2
 177 cat >tmpmultilib2 <<\EOF
 178 #!/bin/sh
 179 # The positional parameters are a list of matches to consider.
 180 # ${dirout} is the directory name and ${optout} is the current list of
 181 # options.
 182 if [ "$#" = "0" ]; then
 183   echo "\"${dirout} ${optout};\","
 184 else
 185   first=$1
 186   shift
 187   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 188   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 189   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 190   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 191     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 192     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 193   fi
 194 fi
 195 EOF
 196 chmod +x tmpmultilib2
 197
 198 # Start with the current directory, which includes only negations.
 199 optout=
 200 for set in ${options}; do
 201   for opt in `echo ${set} | sed -e 's|/| |'g`; do
 202     optout="${optout} !${opt}"
 203   done
 204 done
 205 optout=`echo ${optout} | sed -e 's/^ //'`
 206 echo "\". ${optout};\","
 207
 208 # Work over the list of combinations.  We have to translate each one
 209 # to use the directory names rather than the option names, we have to
 210 # include the information in matches, and we have to generate the
 211 # correct list of options and negations.
 212 for combo in ${combinations}; do
 213   # Use the directory names rather than the option names.
 214   if [ -n "${todirnames}" ]; then
 215     dirout=`echo ${combo} | sed ${todirnames}`
 216   else
 217     dirout=${combo}
 218   fi
 219   # Remove the leading and trailing slashes.
 220   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 221
 222   # Look through the options.  We must output each option that is
 223   # present, and negate each option that is not present.
 224   optout=
 225   for set in ${options}; do
 226     setopts=`echo ${set} | sed -e 's|/| |g'`
 227     for opt in ${setopts}; do
 228       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 229         optout="${optout} ${opt}"
 230       else
 231         optout="${optout} !${opt}"
 232       fi
 233     done
 234   done
 235   optout=`echo ${optout} | sed -e 's/^ //'`
 236
 237   # Output the line with all appropriate matches.
 238   dirout="${dirout}" optout="${optout}" ./tmpmultilib2
 239 done
 240
 241 # Terminate the list of string.
 242 echo "NULL"
 243 echo "};"
 244
 245 # Output all of the matches now as option and that is the same as that, with
 246 # a semicolon trailer.  Include all of the normal options as well.
 247 # Note, the format of the matches is reversed compared
 248 # to what we want, so switch them around.
 249 echo ""
 250 echo "static char *multilib_matches_raw[] = {"
 251 for match in ${matches}; do
 252   l=`echo ${match} | sed -e 's/=.*$//' -e 's/?/=/g'`
 253   r=`echo ${match} | sed -e 's/^.*=//' -e 's/?/=/g'`
 254   echo "\"${r} ${l};\","
 255 done
 256 for set in ${options}; do
 257   for opt in `echo ${set} | sed -e 's|/| |'g`; do
 258     echo "\"${opt} ${opt};\","
 259   done
 260 done
 261 echo "NULL"
 262 echo "};"
 263
 264 # Output the default options now
 265 echo ""
 266 echo "static char *multilib_extra = \"${extra}\";"
 267 rm -f tmpmultilib2
 268
 269 exit 0