gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995 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 output looks like
  46 #   #define MULTILIB_MATCHES "\
  47 #   SUBDIRECTORY OPTIONS;\
  48 #   ...
  49 #   "
  50 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  51 # multiple options separated by spaces.  Each option may start with an
  52 # exclamation point.  gcc will consider each line in turn.  If none of
  53 # the options beginning with an exclamation point are present, and all
  54 # of the other options are present, that subdirectory will be used.
  55 # The order of the subdirectories is such that they can be created in
  56 # order; that is, a subdirectory is preceded by all its parents.
  57
  58 # Here is a example (this is simplified from the actual 680x0 case):
  59 #   genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
  60 #               "m68000=mc68000"
  61 # This produces:
  62 #   #define MULTILIB_SELECT "\
  63 #   . !m68000 !mc68000 !m68020 !msoft-float;\
  64 #   m68000 m68000 !m68020 !msoft-float;\
  65 #   m68000 mc60000 !m68020 !msoft-float;\
  66 #   m68020 !m68000 !mc68000 m68020 !msoft-float;\
  67 #   msoft-float !m68000 !mc68000 !m68020 msoft-float;\
  68 #   m68000/msoft-float m68000 !m68020 msoft-float;\
  69 #   m68000/msoft-float mc68000 !m68020 msoft-float;\
  70 #   m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;\
  71 #   "
  72 # The effect is that `gcc -msoft-float' (for example) will append
  73 # msoft-float to the directory name when searching for libraries or
  74 # startup files, and `gcc -m68000 -msoft-float' (for example) will
  75 # append m68000/msoft-float.
  76
  77 # Copy the positional parameters into variables.
  78 options=$1
  79 dirnames=$2
  80 matches=$3
  81
  82 # What we want to do is select all combinations of the sets in
  83 # options.  Each combination which includes a set of mutually
  84 # exclusive options must then be output multiple times, once for each
  85 # item in the set.  Selecting combinations is a recursive process.
  86 # Since not all versions of sh support functions, we achieve recursion
  87 # by creating a temporary shell script which invokes itself.
  88 rm -f tmpmultilib
  89 cat >tmpmultilib <<\EOF
  90 #!/bin/sh
  91 # This recursive script basically outputs all combinations of its
  92 # input arguments, handling mutually exclusive sets of options by
  93 # repetition.  When the script is called, ${initial} is the list of
  94 # options which should appear before all combinations this will
  95 # output.  The output looks like a list of subdirectory names with
  96 # leading and trailing slashes.
  97 if [ "$#" != "0" ]; then
  98   first=$1
  99   shift
 100   for opt in `echo $first | sed -e 's|/| |'g`; do
 101     echo ${initial}${opt}/
 102   done
 103   ./tmpmultilib $@
 104   for opt in `echo $first | sed -e 's|/| |'g`; do
 105     initial="${initial}${opt}/" ./tmpmultilib $@
 106   done
 107 fi
 108 EOF
 109 chmod +x tmpmultilib
 110
 111 combinations=`initial=/ ./tmpmultilib ${options}`
 112
 113 rm -f tmpmultilib
 114
 115 # Construct a sed pattern which will convert option names to directory
 116 # names.
 117 todirnames=
 118 if [ -n "${dirnames}" ]; then
 119   set x ${dirnames}
 120   shift
 121   for set in ${options}; do
 122     for opt in `echo ${set} | sed -e 's|/| |'g`; do
 123       if [ "$1" != "${opt}" ]; then
 124         todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 125       fi
 126       shift
 127     done
 128   done
 129 fi
 130
 131 # Construct a sed pattern which will add negations based on the
 132 # matches.  The semicolons are easier than getting the shell to accept
 133 # quoted spaces when expanding a variable.
 134 matchnegations=
 135 for i in ${matches}; do
 136   l=`echo $i | sed -e 's/=.*$//' -e 's/?/=/g'`
 137   r=`echo $i | sed -e 's/^.*=//' -e 's/?/=/g'`
 138   matchnegations="${matchnegations} -e s/;!${l};/;!${l};!${r};/"
 139 done
 140
 141 # We need another recursive shell script to correctly handle positive
 142 # matches.  If we are invoked as
 143 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 144 # we must output
 145 #   opt1/opt2 opt1 opt2
 146 #   opt1/opt2 nopt1 opt2
 147 #   opt1/opt2 opt1 nopt2
 148 #   opt1/opt2 nopt1 nopt2
 149 # In other words, we must output all combinations of matches.
 150 rm -f tmpmultilib2
 151 cat >tmpmultilib2 <<\EOF
 152 #!/bin/sh
 153 # The positional parameters are a list of matches to consider.
 154 # ${dirout} is the directory name and ${optout} is the current list of
 155 # options.
 156 if [ "$#" = "0" ]; then
 157   echo "${dirout} ${optout};\\"
 158 else
 159   first=$1
 160   shift
 161   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 162   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 163   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 164   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 165     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 166     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 167   fi
 168 fi
 169 EOF
 170 chmod +x tmpmultilib2
 171
 172 # We are ready to start output.
 173 echo '#define MULTILIB_SELECT "\'
 174
 175 # Start with the current directory, which includes only negations.
 176 optout=
 177 for set in ${options}; do
 178   for opt in `echo ${set} | sed -e 's|/| |'g`; do
 179     optout="${optout} !${opt}"
 180   done
 181 done
 182 optout=`echo ${optout} | sed -e 's/^ //'`
 183 if [ -n "${matchnegations}" ]; then
 184   optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
 185 fi
 186 echo ". ${optout};\\"
 187
 188 # Work over the list of combinations.  We have to translate each one
 189 # to use the directory names rather than the option names, we have to
 190 # include the information in matches, and we have to generate the
 191 # correct list of options and negations.
 192 for combo in ${combinations}; do
 193   # Use the directory names rather than the option names.
 194   if [ -n "${todirnames}" ]; then
 195     dirout=`echo ${combo} | sed ${todirnames}`
 196   else
 197     dirout=${combo}
 198   fi
 199   # Remove the leading and trailing slashes.
 200   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 201
 202   # Look through the options.  We must output each option that is
 203   # present, and negate each option that is not present.
 204   optout=
 205   for set in ${options}; do
 206     setopts=`echo ${set} | sed -e 's|/| |g'`
 207     for opt in ${setopts}; do
 208       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 209         optout="${optout} ${opt}"
 210       else
 211         optout="${optout} !${opt}"
 212       fi
 213     done
 214   done
 215   optout=`echo ${optout} | sed -e 's/^ //'`
 216
 217   # Add any negations of matches.
 218   if [ -n "${matchnegations}" ]; then
 219     optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
 220   fi
 221
 222   # Output the line with all appropriate matches.
 223   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 ${matches}
 224 done
 225
 226 rm -f tmpmultilib2
 227
 228 # That's it.
 229 echo '"'
 230
 231 exit 0